tripal/tripal_bulk_loader/tripal_bulk_loader.admin.inc

<?php

/**
 * @file
 * Handles Create/Edit/Delete Template Admin Forms
 */

/**
 * Provides a description page and quick links for the bulk loader
 */
function tripal_bulk_loader_admin_template() {
  $output = '';

  $output .= '<br><h3>Quick Links:</h3>';
  $output .= l('Create a new bulk loader template', 'admin/tripal/tripal_bulk_loader_template/create') . "<br>";
  $output .= l('Edit a bulk loader template', 'admin/tripal/tripal_bulk_loader_template/edit') . "<br>";
  $output .= l('Delete a bulk loader template', 'admin/tripal/tripal_bulk_loader_template/delete') . "<br>";
  $output .= l('Export a bulk loader template', 'admin/tripal/tripal_bulk_loader_template/export') . "<br>";
  $output .= l('Import a bulk loader template', 'admin/tripal/tripal_bulk_loader_template/import') . "<br>";
  $output .= '<br>';

  $output .= '<h3>Module Description:</h3>';
  $output .= '<p>This module provides the ability to create loading templates for any tab-delimited '
    . 'data file allowing it to be loaded into chado. The Loading Templates are a direct mapping '
    . 'between the columns in your file and the columns in chado tables. As such to use this tool '
    . 'you need to be very familar with the chado schema -See '
    . l('Chado -Getting Started', 'http://gmod.org/wiki/Chado_-_Getting_Started')
    . '. The ability to add constants and specify foreign key contraints is also provided '
    . 'in order for the loader to fill chado columns which may be required but are not specified '
    . 'in your input file.</p>';
  $output .= '<br>';

  $output .= '<h3>Setup Instructions</h3>';
  $output .= '<p>After intallation of the bulk loader module, the following tasks should be performed:</p>';
  $output .= '<ol>';
  $output .= '<li><b>Install Theme:</b> In order for Bulk Loading pages to be displayed correctly, '
    .'the contents of the Tripal Bulk Loader theme directory ([drupal root]/sites/all/modules/tripal/tripal_bulk_loader/theme) '
    .'should be moved to the base directory of the Tripal theme ([drupal root]/sites/all/themes/tripal). '
    .'Finally the drupal cache should be cleared for the new theme to take effect -navigate to admin/settings/performance '
    .'and click the Clear Cached Data button.</li>';
  $output .= '</ol>';

  return $output;
}

/**
 * A Configuration form for this module
 */
function tripal_bulk_loader_configuration_form($form_state = NULL) {
  $form = array();

  $form['speed'] = array(
    '#type' => 'fieldset',
    '#title' => t('Possible Speed Improvements'),
  );

  $form['speed']['prepare'] = array(
    '#type' => 'checkbox',
    '#title' => t('Use Prepared Statements'),
    '#description' => t('SQL Prepared Statements allow for SQL queries which will be run '
      .'many times to be parsed, rewritten and planned only once rather then every time '
      .'the query is run. In the case of the bulk loader, this ensures that planning only '
      .'occurs once for each "record" in your bulk loading template.'),
    '#default_value' => variable_get('tripal_bulk_loader_prepare', TRUE),
  );

  $form['speed']['disable_triggers'] = array(
    '#type' => 'checkbox',
    '#title' => t('Delay Constraint Checking during loading job.'),
    '#description' => t('This delays the constraint checking until the end of the
    loading proccess.'),
    '#default_value' => variable_get('tripal_bulk_loader_disable_triggers', TRUE),
  );

  $form['speed']['transactions'] = array(
    '#type' => 'radios',
    '#title' => t('Transaction Rollback when an error is encountered'),
    '#options' => array(
      'all' => t('Rollback the last constant set.'
        .'<div class="description"If you added more then one constant set then the
        successfully loaded constant sets will not be rolled back. However, once an error
        is encountered no further constant sets will be loaded either.</div>'),
      'row' => t('Only Rollback the last line of the input file.'
        .'<div class="description">This option may allow you to restart the job after
        fixing the error (manual intervention needed).</div>'),
      'none' => t('Do not use transactions<div class="description">This is not recommended.</div>')
    ),
    '#default_value' => variable_get('tripal_bulk_loader_transactions','row')
  );

  $form['submit1'] = array(
    '#type' => 'submit',
    '#value' => t('Save')
  );

  return $form;
}

/**
 * A Configuration form for this module (Submit)
 */
function tripal_bulk_loader_configuration_form_submit($form, $form_state) {

  variable_set('tripal_bulk_loader_prepare', $form_state['values']['prepare']);
  variable_set('tripal_bulk_loader_disable_triggers', $form_state['values']['disable_triggers']);
  variable_set('tripal_bulk_loader_transactions',$form_state['values']['transactions']);

}

//////////////////////////////////////////////////////////////////////////////////////
// Modify Template
//////////////////////////////////////////////////////////////////////////////////////


/**
 * The main form reached at admin/tripal/tripal_bulk_loader/create and /edit
 */
function tripal_bulk_loader_modify_template_base_form($form_state = NULL, $mode) {
  $form = array();

   // get template id from path and rebuild form
   if ($_GET['template_id']) {
    if (preg_match('/^\d+$/', $_GET['template_id'])) {
      $form_state['storage']['template_id'] = $_GET['template_id'];
    }

    $sql = "SELECT * FROM {tripal_bulk_loader_template} WHERE template_id=%d";
    $result = db_fetch_object(db_query($sql, $form_state['storage']['template_id']));
    $form_state['storage']['template'] = unserialize($result->template_array);
    $form_state['storage']['template_name'] = $result->name;

    $form_state['storage']['record2priority'] = array();
    foreach ($form_state['storage']['template'] as $priority => $record_array) {
      if (!is_array($record_array)) {
      continue; }
      $form_state['storage']['record2priority'][$record_array['record_id']] = $priority;
    }
  }

  $form['mode'] = array(
    '#type' => 'hidden',
    '#value' => $mode,
  );

  if ($form_state['storage']['template_id']) {
    $form['template_name'] = array(
        '#type' => 'item',
        '#title' => 'Template',
        '#value' => $form_state['storage']['template_name'],
        '#weight' => 1,
    );
  }
  else {
    if (preg_match('/create/', $mode)) {
     $form['new_template_name'] = array(
        '#type' => 'textfield',
        '#title' => 'Template Name',
        '#weight' => 1,
      );
    }
    elseif (preg_match('/edit/', $mode)) {
      $sql = "SELECT * FROM {tripal_bulk_loader_template}";
      $resource = db_query($sql);
      $templates = array();
      $templates[''] = 'Select a Template';
      while ($r = db_fetch_object($resource)) {
        $templates[$r->template_id] = $r->name;
      }

      $form['template_id'] = array(
        '#title'         => t('Template'),
        '#description'   => t('Please select the template you would like to edit.'),
        '#type'          => 'select',
        '#options'       => $templates,
        '#default_value' => $form_state['storage']['template_id'],
        '#weight'        => 0,
        '#required'      => TRUE,
        '#weight' => 1,
      );
    }
  }

  $form['records'] = array(
    '#type' => ($form_state['storage']['template_id'])? 'fieldset' : 'hidden',
    '#title' => t('Current Records'),
    '#collapsible' => TRUE,
    '#weight' => 2,
  );

  $form['records']['description'] = array(
    '#type' => 'item',
    '#value' => 'Records will be inserted into the chado database in the order listed below. To '
      .'change this order: <ul><li>Drag the rows into the correct order OR</li><li>Enter '
      .'the numbers 1 and up in the Order textboxes to indicate the correct order.</li></ul>',
  );

  $form['records']['records-data'] = array(
    '#tree' => TRUE,
  );

  $form['records']['no_records'] = array(
    '#type' => 'hidden',
    '#value' => TRUE,
  );

  $form['records']['submit-new_record'] = array(
    '#type' => 'submit',
    '#value' => 'New Record/Field',
  );

  $form['records']['submit-reorder'] = array(
    '#type' => 'submit',
    '#value' => 'Save Order',
  );

  $form['fields'] = array(
    '#type' => ($form_state['storage']['template_id'])? 'fieldset' : 'hidden',
    '#title' => t('Current Fields'),
    '#collapsible' => TRUE,
    '#weight' => 3,
  );

  $form['fields']['fields-data'] = array(
    '#tree' => TRUE,
  );

  if ($form_state['storage']['template']) {

    // List Current Fields -------------------------------------------------------------
    $i=1;
    foreach ($form_state['storage']['template'] as $priority => $table_array) {
      if (!is_array($table_array)) {
      continue; }

        $form['records']['no_records']['#value'] = FALSE;

        $form['records']['records-data'][$priority] = array(
          'title' => array(
            '#type' => 'markup',
            '#value' => $table_array['record_id'],
          ),
          'chado_table' => array(
            '#type' => 'markup',
            '#value' => $table_array['table'],
          ),
          'mode' => array(
            '#type' => 'item',
            '#value' => ($table_array['mode']) ? $table_array['mode'] : 'insert_unique',
          ),
          'new_priority' => array(
            '#type' => 'select',
            '#options' => range(1, sizeof($form_state['storage']['template'])),
            '#default_value' => $priority,
          ),
          'old_priority' => array(
            '#type' => 'hidden',
            '#value' => $priority,
          ),
          'id'  => array(
            '#type' => 'hidden',
            '#value' => $priority,
          ),
          'submit-edit_record' => array(
            '#type' => 'submit',
            '#name' => (string)$priority,
            '#value' => 'Edit Record',
          ),
          'submit-add_field' => array(
            '#type' => 'submit',
            '#name' => (string)$priority,
            '#value' => 'Add Field',
          ),
          'submit-duplicate_record' => array(
            '#type' => 'submit',
            '#name' => (string)$priority,
            '#value' => 'Duplicate Record'
          ),
        );

        foreach ($table_array['fields'] as $field_index => $field) {

          $form['fields']['fields-data'][$i] = array(
            'record_id' => array(
              '#type' => 'item',
              '#value' => $table_array['record_id'],
            ),
            'priority_hidden' => array(
              '#type' => 'hidden',
              '#value' => $priority,
            ),
            'field_name' => array(
              '#type' => 'item',
              '#value' => $field['title'],
            ),
            'chado_table_name' => array(
              '#type' => 'item',
              '#value' => $table_array['table'],
            ),
            'chado_table_hidden' => array(
              '#type' => 'hidden',
              '#value' => $table_array['table'],
            ),
            'chado_field_name' => array(
              '#type' => 'item',
              '#value' => $field['field'],
            ),
            'sheet_name' => array(
              '#type' => 'item',
              '#value' => $field['spreadsheet sheet'],
            ),
            'column_num' => array(
              '#type' => 'item',
              '#value' => $field['spreadsheet column'],
            ),
            'constant_value' => array(
              '#type' => 'item',
              '#value' => $field['constant value'],
            ),
            'field_index' => array(
              '#type' => 'hidden',
              '#value' => $field_index
            ),
            'foreign_record_id' => array(
              '#type' => 'item',
              '#value' => $field['foreign key'],
            ),
            'edit_submit' => array(
              '#type' => 'submit',
              '#name' => (string)$i,
              '#value' => "Edit Field",
            ),
            'delete_submit' => array(
              '#type' => 'submit',
              '#name' => (string)$i,
              '#value' => "Delete Field",
            ),
          );

          $i++;
        }
    }
    $form['fields']['total_fields'] = array(
      '#type' => 'item',
      '#value' => $i,
    );

  }

  if ($form['records']['no_records']['#value']) {
    $form['records']['description'] = array(
      '#type' => 'item',
      '#value' => 'There are currently no records.',
    );
    unset($form['records']['submit-reorder']);

    $form['fields']['description'] = array(
      '#type' => 'item',
      '#value' => 'There are currently no fields.',
    );

  }

  $mode_title = (preg_match('/create/', $mode)) ? 'Create Template' : 'Edit Template';
  $value = ($form_state['storage']['template_id'])? 'Save Template' : $mode_title;
  $form['submit'] = array(
    '#type' => 'submit',
    '#value' => $value,
    '#weight' => 4,
  );
  return $form;
}

/**
 * Submit for tripal_bulk_loader_modify_template_base_form
 */
function tripal_bulk_loader_modify_template_base_form_submit($form, &$form_state) {

  $form_state['rebuild'] = TRUE;
  if ($form_state['storage']['template_id']) {
    $sql = "SELECT * FROM {tripal_bulk_loader_template} WHERE template_id=%d";
    $result = db_fetch_object(db_query($sql, $form_state['storage']['template_id']));
    $form_state['storage']['template'] = unserialize($result->template_array);
  }

  $op = $form_state['values'][ $form_state['clicked_button']['#name'] ];
  switch ($op) {
    // Initialize after template is chosen ----------------------------------------
    case 'Edit Template':
      $form_state['storage']['template_id'] = $form_state['values']['template_id'];

      $sql = "SELECT * FROM {tripal_bulk_loader_template} WHERE template_id=%d";
      $result = db_fetch_object(db_query($sql, $form_state['storage']['template_id']));
      $form_state['storage']['template'] = unserialize($result->template_array);
      $form_state['storage']['template_name'] = $result->name;

      $form_state['storage']['record2priority'] = array();
      foreach ($form_state['storage']['template'] as $priority => $record_array) {
        if (!is_array($record_array)) {
         continue;
         }
        $form_state['storage']['record2priority'][$record_array['record_id']] = $priority;
      }
    break;

    case 'Create Template':
      $record = array(
        'name' => $form_state['values']['new_template_name'],
        'template_array' => array(),
      );
      drupal_write_record('tripal_bulk_loader_template', $record);
      $form_state['storage']['template_id'] = $record['template_id'];
      $form_state['storage']['template_name'] = $record['name'];
      $form_state['storage']['template'] = array();
    break;

    // Save Reordered Records -----------------------------------------------------
    case 'Save Order':
      $new_template = $form_state['storage']['template'];
      // unset old elements
       $form_state['storage']['record2priority'] = array();
      foreach ($new_template as $priority => $record_array) {
        if (preg_match('/\d+/', $priority)) {
           unset($new_template[$priority]);
         }
      }
      //set elements in new order
      foreach ($form_state['values']['records-data'] as $item) {
        $new_template[$item['new_priority']] = $form_state['storage']['template'][$item['old_priority']];
        $record_name = $new_template[$item['new_priority']]['record_id'];
        $form_state['storage']['record2priority'][$record_name] = $item['new_priority'];
      }
      ksort($new_template);
      $form_state['storage']['template'] = $new_template;
    break;

    case 'New Record/Field':
      $query = array(
        'template_id' => $form_state['storage']['template_id'],
        'record_id' => 'NEW',
      );
      drupal_goto('admin/tripal/tripal_bulk_loader_template/add_field', $query);
    break;

    case 'Edit Record':
      $query = array(
        'template_id' => $form_state['storage']['template_id'],
        'record_id' => $form_state['clicked_button']['#name'],
      );
      drupal_goto('admin/tripal/tripal_bulk_loader_template/edit_record', $query);
    break;

    case 'Add Field':
      $query = array(
        'template_id' => $form_state['storage']['template_id'],
        'record_id' => $form_state['clicked_button']['#name'],
      );
      drupal_goto('admin/tripal/tripal_bulk_loader_template/add_field', $query);
    break;

    case 'Duplicate Record':
      // original record (one to be duplicated)
      $orig_priority = $form_state['clicked_button']['#name'];
      $record = $form_state['storage']['template'][ $orig_priority ];

      // new record
      $new_priority = sizeof($form_state['storage']['template']) + 1;
      $record['record_id'] = $record['record_id'] . '_' . date('YzHi');
      $form_state['storage']['template'][ $new_priority ] = $record;
    break;

    case 'Edit Field':
      $field_data_index = $form_state['clicked_button']['#name'];
      $query = array(
        'template_id' => $form_state['storage']['template_id'],
        'record_id' => $form_state['values']['fields-data'][$field_data_index]['priority_hidden'],
        'field_index' => $form_state['values']['fields-data'][$field_data_index]['field_index'],
      );
      drupal_goto('admin/tripal/tripal_bulk_loader_template/edit_field', $query);
    break;

    case 'Delete Field':
      $field_data = $form_state['values']['fields-data'][$form_state['clicked_button']['#name']];
      $priority = $field_data['priority_hidden'];
      $field_key = $field_data['field_index'];
      unset($form_state['storage']['template'][$priority]['fields'][$field_key]);
      if (!$form_state['storage']['template'][$priority]['fields']) {
        unset($form_state['storage']['record2priority'][$form_state['storage']['template'][$priority]['record_id']]);
        unset($form_state['storage']['template'][$priority]);
      }
      drupal_set_message('Deleted Field from Template.');
    break;
  } //end of switch

  // Save Template
  $record = array(
    'template_id' => $form_state['storage']['template_id'],
    'template_array' => serialize($form_state['storage']['template'])
  );
  drupal_write_record('tripal_bulk_loader_template', $record, array('template_id'));
  drupal_set_message('Template Saved.');

}

//////////////////////////////////////////////////////////////////////////////////////
// Delete Template
//////////////////////////////////////////////////////////////////////////////////////

/**
 * Delete Template Form
 * This form allows admin to delete already existing templates
 */
function tripal_bulk_loader_delete_template_base_form() {
  $form = array();

  $sql = "SELECT * FROM {tripal_bulk_loader_template}";
  $resource = db_query($sql);
  $templates = array();
  $templates[''] = 'Select a Template';
  while ($r = db_fetch_object($resource)) {
    $templates[$r->template_id] = $r->name;
  }
  $form['template_name'] = array(
      '#title'         => t('Template'),
      '#description'   => t('Please select the template you would like to delete.'),
      '#type'          => 'select',
      '#options'       => $templates,
      '#weight'        => 0,
      '#required'      => TRUE,
  );

  $form['submit'] = array(
    '#type' => 'submit',
    '#value' => 'Delete Template',
  );

  return $form;
}

/**
 * Delete Template Form Submit
 *
 * @param $form
 *   The form that was submitted
 * @param $form_state
 *   The values and storage that were submitted
 */
function tripal_bulk_loader_delete_template_base_form_submit($form, &$form_state) {
  $sql = "DELETE FROM {tripal_bulk_loader_template} WHERE template_id=%d";
  db_query($sql, $form_state['values']['template_name']);
}

//////////////////////////////////////////////////////////////////////////////////////
// Import/Export Template
//////////////////////////////////////////////////////////////////////////////////////

/**
 * Import/Export Template Form
 *
 * On export, simply selects the serialized array from the db for a given template
 * and presents it to the user. On import, a serialized template array and a name is
 * supplied and a template record is created.
 *
 * @todo Make array presented to the user more readable. (ie: unserialize and print to the screen)
 *
 * @param $form_state
 *   The values and storage for the form
 * @param $mode
 *   Either 'import' or 'export' to indicate which function is being performed
 * @return
 *   A form array to be rendered by drupal_get_form
 */
function tripal_bulk_loader_import_export_template_form($form_state = NULL, $mode) {
  $form = array();

  $form['mode'] = array(
    '#type' => 'hidden',
    '#value' => $mode,
  );

  if (preg_match('/import/', $mode)) {
   $form['new_template_name'] = array(
      '#type' => 'textfield',
      '#title' => 'Template Name',
      '#weight' => 1,
    );
  }
  elseif (preg_match('/export/', $mode)) {
    $sql = "SELECT * FROM {tripal_bulk_loader_template}";
    $resource = db_query($sql);
    $templates = array();
    $templates[''] = 'Select a Template';
    while ($r = db_fetch_object($resource)) {
      $templates[$r->template_id] = $r->name;
    }

    $form['template_id'] = array(
      '#title'         => t('Template'),
      '#description'   => t('Please select the template you would like to edit.'),
      '#type'          => 'select',
      '#options'       => $templates,
      '#default_value' => $form_state['storage']['template_id'],
      '#weight'        => 0,
      '#required'      => TRUE,
      '#weight' => 1,
    );
  }

  $form['template_array'] = array(
    '#type' => 'textarea',
    '#title' => 'Template Array',
    '#default_value' => $form_state['storage']['template_array'],
    '#weight' => 2,
  );

  $form['submit'] = array(
    '#type' => 'submit',
    '#value' => 'Submit',
    '#weight' => 10,
  );

  return $form;
}

/**
 * Import/Export Template Form Submit
 *
 * @param $form
 *   The form that was submitted
 * @param $form_state
 *   The values and storage that were submitted
 */
function tripal_bulk_loader_import_export_template_form_submit($form, &$form_state) {
  switch ($form_state['values']['mode']) {
    case 'export':
      $record = db_fetch_object(db_query("SELECT * FROM {tripal_bulk_loader_template} WHERE template_id=%d", $form_state['values']['template_id']));
      $form_state['storage']['template_array'] = $record->template_array;
      $form_state['storage']['template_id'] = $form_state['values']['template_id'];
    break;
    case 'import':
      $record = array(
        'name' => $form_state['values']['new_template_name'],
        'template_array' => $form_state['values']['template_array'],
      );
      drupal_write_record('tripal_bulk_loader_template', $record);
      if ($record->template_id) {
        drupal_set_message('Successfully imported Tripal Bulk Loader Template.');
      }
    break;
  }
}

//////////////////////////////////////////////////////////////////////////////////////
// Edit Record Form
//////////////////////////////////////////////////////////////////////////////////////

/**
 * Edit Record Form
 *
 * This form is meant to be called from a bulk loader form. The following should be set
 * in the query section of the path:
 *  - template_id=\d+: the template which the edited record is part of
 *  - record_id=\d+: the priority or key in the template array of the record to be edited
 *
 * @param $form_state
 *   Contains the values and storage for the form
 * @return
 *   A form array to be rendered by drupal_get_form
 */
function tripal_bulk_loader_edit_template_record_form(&$form_state = NULL) {
   $form['#cache'] = TRUE; // Make sure the form is cached.

   // get template id from path
   $template_id = ($_GET['template_id'] !== NULL) ? $_GET['template_id'] : $form_state['values']['template_id'];

   // if there is no template supplied don't return rest of form
   if (!$template_id) {
     return $form;
   }

  // Pre-process values/defaults ---------------------------

   // If this is the first load of the form (no form state) we need to initialize some variables
   if (!$form_state['storage']['template']) {
    $sql = "SELECT * FROM {tripal_bulk_loader_template} WHERE template_id=%d";
    $template = db_fetch_object(db_query($sql, $template_id));
    $form_state['storage']['template_array'] = unserialize($template->template_array);
    $form_state['storage']['template'] = $template;

    $form_state['storage']['record2priority'] = array();
    foreach ($form_state['storage']['template_array'] as $priority => $record_array) {
      if (!is_array($record_array)) {
         continue;
       }
      $form_state['storage']['record2priority'][$record_array['record_id']] = $priority;
    }

    $form_state['storage']['referring URL'] = $_SERVER["HTTP_REFERER"];
  }
  else {
    $template = $form_state['storage']['template'];
  }

   // get the record_id from the path
   if ($_GET['record_id'] !== NULL) {
     $form_state['values']['field_group'] = $_GET['record_id'];
     $form_state['storage']['original_priority'] = $_GET['record_id'];
  }


  // Tables and default table
  $tables = tripal_core_get_chado_tables();
  if ($form_state['values']['chado_table']) {
    $table = $form_state['values']['chado_table'];
  }
  else {
    $table = $form_state['storage']['template_array'][$form_state['storage']['original_priority']]['table'];
  }

  //dpm($form_state, 'form state');

   // Form Proper -------------------------------------------
  $form['template_name'] = array(
    '#type' => 'item',
    '#title' => 'Template',
    '#value' => $template->name,
  );

  $form['template_id'] = array(
    '#type' => 'hidden',
    '#value' => $template_id,
  );

  $form['edit_record'] = array(
    '#type' => 'fieldset',
  );

  // check template array for records then add one more
  if (!$form_state['storage']['record2priority']) {
    $groups = array();
  }
  else {
    $groups = array_flip($form_state['storage']['record2priority']);
  }
  $priority_default = $form_state['values']['field_group'];
  $form['edit_record']['field_group']  = array(
    '#type' => 'select',
    '#title' => 'Record',
    '#description' => 'By Changing the record here, you can move all the fields from the current record into the selected record.',
    '#options' => $groups,
    '#default_value' => $priority_default,
    '#required' => TRUE,
  );

  $form['edit_record']['record_name'] = array(
    '#type' => 'textfield',
    '#title' => 'Unique Record Name',
    '#default_value' => $groups[$priority_default],
  );

  $form['edit_record']['chado_table'] = array(
    '#type' => 'select',
    '#title' => t('Chado Table'),
    '#description' => 'This changes the chado table for all fields in this record.',
    '#options' => $tables,
    '#default_value' => $table,
  );

  $form['edit_record']['mode'] = array(
    '#type' => 'radios',
    '#title' => 'Action to take when Loading Record',
    '#options' => array(
      'select' => 'SELECT: Don\'t insert this record: it\'s used to define a foreign key in another record',
      'insert' => 'INSERT: Insert the record',
      'optional' => 'OPTIONAL: Record will only be inserted if all required data is filled in',
      'insert_once' => 'INSERT ONCE: Record will be inserted once for the entire spreadsheet',
      'insert_unique' => 'INSERT UNIQUE: Only insert record if there isn\'t a record with the same values',
    ),
    '#default_value' => 'insert_unique'
  );

  $form['edit_record']['submit-edit_record'] = array(
      '#type' => 'submit',
      '#value' => 'Edit Record'
  );

  $form['edit_record']['submit-cancel'] = array(
      '#type' => 'submit',
      '#value' => 'Cancel'
  );

  return $form;
}


/**
 * Edit Record Form Submit
 *
 * @param $form
 *   The form that was submitted
 * @param $form_state
 *   Contains the values and storage for the form
 */
function tripal_bulk_loader_edit_template_record_form_submit($form, &$form_state) {
  //dpm($form_state, 'form state -start submit');

  if (!$form_state['ahah_submission']) {
    if ($form_state['values']['op'] ==  'Edit Record') {

      $template = $form_state['storage']['template_array'];

      // Edit Record
      $record = $template[ $form_state['storage']['original_priority'] ];
      $record['record_id'] = $form_state['values']['record_name'];
      $record['mode'] = $form_state['values']['mode'];
      $record['table'] = $form_state['values']['chado_table'];

      if ($form_state['storage']['original_priority'] != $form_state['values']['field_group']) {
        $record['fields'] = array_merge($record['fields'], $template[ $form_state['values']['field_group'] ]['fields']);
        $template[ $form_state['values']['field_group'] ] = $record;
        unset($template[ $form_state['storage']['original_priority'] ]);
      }
      else {
        $template[ $form_state['storage']['original_priority'] ] = $record;
      }

      // Save Template
      $form_state['storage']['template']->template_array = serialize($template);
      $success = drupal_write_record('tripal_bulk_loader_template', $form_state['storage']['template'], array('template_id'));

      if ($success) {
        drupal_set_message('Successfully Updated Template Record');
        drupal_set_message('Template Saved.');

        $path = explode('?', $form_state['storage']['referring URL']);
        parse_str($path[1], $query);
        $query['template_id'] = $form_state['storage']['template']->template_id;
        drupal_goto($path[0], $query);
      }
      else {
        drupal_set_message('Unable to Save Template!', 'error');
        watchdog('T_bulk_loader',
          'Unable to save bulk loader template: %template',
          array('%template' => print_r($form_state['storage']['template'], TRUE)),
          WATCHDOG_ERROR
        );
      }
    }
    elseif ($form_state['values']['op'] ==  'Cancel') {
        $path = explode('?', $form_state['storage']['referring URL']);
        parse_str($path[1], $query);
        $query['template_id'] = $form_state['storage']['template']->template_id;
        //dpm('Redirecting to: '.$path[0].'?'.print_r($query,TRUE).' where the referring URL:'.$form_state['storage']['referring URL']);
        drupal_goto($path[0], $query);
    }
  }

}

//////////////////////////////////////////////////////////////////////////////////////
// Add/Edit Field Forms
//////////////////////////////////////////////////////////////////////////////////////

/**
 * Add Field Form
 *
 * This form is meant to be called from a bulk loader form. Blank Defaults are in place but you
 * can use the following in the query of the path to set defaults for a given template:
 *  - template_id=\d+: the template to add the field to
 *  - record_id=\d+: the priority or key in the template array of the record to add the field to
 *
 * @param $form_state
 *   Contains the values and storage for the form
 * @return
 *   A form array to be rendered by drupal_get_form
 */
function tripal_bulk_loader_add_template_field_form(&$form_state = NULL) {
  $form = array();
   $form['#cache'] = TRUE; // Make sure the form is cached.

   // get template id from path
   $template_id = ($_GET['template_id']) ? $_GET['template_id'] : $form_state['values']['template_id'];

   // if there is no template supplied don't return rest of form
   if (!$template_id) {
     return $form;
   }

  // Pre-set Variables needed for form proper------------------------------------------

   // If this is the first load of the form (no form state) we need to initialize some variables
   if (!$form_state['storage']['template']) {
    $sql = "SELECT * FROM {tripal_bulk_loader_template} WHERE template_id=%d";
    $template = db_fetch_object(db_query($sql, $template_id));
    $form_state['storage']['template_array'] = unserialize($template->template_array);
    $form_state['storage']['template'] = $template;

    $form_state['storage']['record2priority'] = array();
    foreach ($form_state['storage']['template_array'] as $priority => $record_array) {
      if (!is_array($record_array)) {
        continue;
      }
      $form_state['storage']['record2priority'][$record_array['record_id']] = $priority;
    }

    $form_state['storage']['referring URL'] = $_SERVER["HTTP_REFERER"];
  }
  else {
    $template = $form_state['storage']['template'];
  }

  $field_type = ($form_state['values']['field_type'])? $form_state['values']['field_type'] : 'table field';

  // Tables and default table
  $tables = tripal_core_get_chado_tables();
  if ($form_state['values']) {
    if (!preg_match('/^' . current($tables) . '$/', $form_state['values']['chado_table'])) {
      $table = $form_state['values']['chado_table'];
    }
    elseif ($form_state['values']['record_name']) {
      $record_name = $form_state['values']['record_name'];
      $priority = $form_state['storage']['record2priority'][$record_name];
      $table = $form_state['storage']['template_array'][$priority]['table'];
    }
    else {
      $priority = $form_state['values']['field_group'];
      $table = $form_state['storage']['template_array'][$priority]['table'];
    }
  }
  if (!$table) {
    $table = reset($tables);
  }

   // get the record_id from the path
   if ($_GET['record_id'] !== NULL) {
     $form_state['values']['field_group'] = $_GET['record_id'];
    if (preg_match('/\d+/', $_GET['record_id'])) {
      $priority = $form_state['values']['field_group'];
      $table = $form_state['storage']['template_array'][$priority]['table'];
    }
  }

  // Fields and foreign key mappings
  $chado_fields = array();
  $fk_options = array();
  $fk_options['NULL'] = 'None';
  $table_description = module_invoke_all('chado_' . $table . '_schema');
  //dpm($table_description, 'table description for |'.$table.'|');
  if ($field_type == 'foreign key') {
    $foreign_field2table = array();
    foreach ($table_description['foreign keys'] as $key_table => $key_array) {
      foreach ($key_array['columns'] as $left_field => $right_field) {
        $chado_fields[$left_field] = $left_field;
        $foreign_field2table[$left_field] = $key_table;
      }
    }
    reset($chado_fields);

    // set default field
    if (empty($chado_fields)) {
      $field = NULL;
    }
    elseif ($chado_fields[$form_state['values']['chado_field']]) {
      $field = $form_state['values']['chado_field'];
    }
    else {
      $field = current($chado_fields);
    }

    // Foreign key options
    $foreign_table = $foreign_field2table[$field];
    if ($foreign_table) {
      foreach ($form_state['storage']['record2priority'] as $record_name => $priority ) {
        if (preg_match('/^' . $foreign_table . '$/', $form_state['storage']['template_array'][$priority]['table'])) {
          $fk_options[$record_name] = $record_name;
        }
      }
    }
  }
  else {
    foreach ($table_description['fields'] as $field_name => $field_array) {
        $chado_fields[$field_name] = $field_name;
    }
  }

  $variables = array(
    'form_state' => $form_state,
    'tables' => $tables,
    'default table' => $table,
    'fields' => $chado_fields,
    'default_field' => $field,
    'priority' => $priority,
    'record_name' => $record_name,
    'table description' => $table_description,
    'foreign key options' => $fk_options,
    'foreign field=>table' => $foreign_field2table,
    'foreign table' => $foreign_table,
  );
  //dpm($variables, 'variables');

  // Start of Form Proper--------------------------------------------------------------
  //dpm($form_state, 'Form State');

  $form['template_name'] = array(
    '#type' => 'item',
    '#title' => 'Template',
    '#value' => $template->name,
  );

  $form['template_id'] = array(
    '#type' => 'hidden',
    '#value' => $template_id,
  );

  $form['add_fields'] = array(
    '#type' => 'fieldset',
    '#prefix' => '<div id="tripal_bulk_loader_template-add_field">',
    '#suffix' => '</div>',
  );

  $form['add_fields']['field_type'] = array(
    '#type' => 'radios',
    '#title' => t('Type of Field'),
    '#options' => array(
      'table field' => t('Spreadsheet: Fields which maps to a Spreadsheet Column'),
      'constant' => t('Constant: Field which remains Constant throughout the Spreadsheet'),
      'foreign key' => t('Foreign Key: Fields which map to a record in another table'),
    ),
    '#required' => TRUE,
    '#default_value' => $field_type,
    '#ahah' => array(
      'path' => 'admin/tripal/tripal_bulk_loader_template/add_field_ahah',
      'wrapper' => 'tripal_bulk_loader_template-add_field',
      'effect' => 'fade'
    ),
  );

  // check template array for records then add one more
  if (!$form_state['storage']['record2priority']) {
    $groups = array();
  }
  else {
    $groups = array_flip($form_state['storage']['record2priority']);
  }
  $groups['NONE'] = 'Select a Record';
  $groups['NEW'] = 'New Record';
  $form['add_fields']['field_group']  = array(
    '#type' => 'select',
    '#title' => 'Record',
    '#description' => 'This is used to group a set of fields together allowing '
      .'multiple records to be inserted into the same table per line of the spreadsheet',
    '#options' => $groups,
    '#default_value' => (preg_match('/\w+.*/', $form_state['values']['field_group'])) ? $form_state['values']['field_group'] : 'NONE',
    '#ahah' => array(
      'path' => 'admin/tripal/tripal_bulk_loader_template/add_field_ahah',
      'wrapper' => 'tripal_bulk_loader_template-add_field',
      'effect' => 'fade'
    ),
    '#required' => TRUE,
  );

  $form['add_fields']['record_name'] = array(
    '#type' => (preg_match('/NEW/', $form_state['values']['field_group'])) ? 'textfield' : 'hidden',
    '#title' => 'Unique Record Name',
    '#prefix' => '<div id="tripal_bulk_loader_template-add_record">',
    '#suffix' => '</div>',
    '#default_value' => $form_state['values']['record_name'],
  );

  $form['add_fields']['field_title'] = array(
    '#type' => 'textfield',
    '#title' => t('Human-readable Title for Field'),
    '#default_value' => $form_state['values']['field_title'],
  );

  // Spreadsheet column
  $form['add_fields']['columns'] = array(
    '#type' => 'fieldset',
    '#title' => t('Spreadsheet Column'),
    '#collapsible' => TRUE,
    '#collapsed' => ($field_type == 'table field')? FALSE : TRUE,
  );

  $form['add_fields']['columns']['sheet_name'] = array(
    '#type' => 'textfield',
    '#title' => t('Worksheet'),
    '#description' => t('Specify the name of the worksheet.'),
    '#size' => 5,
    '#default_value' => ($form_state['values']['sheet_name'])? $form_state['values']['sheet_name'] : 'Sheet1',
  );

  $form['add_fields']['columns']['column_number'] = array(
    '#type' => 'textfield',
    '#title' => t('Column'),
    '#description' => t('Specify the column in the spreadsheet that this field maps to where the first column is 1.'),
    '#size' => 5,
    '#default_value' => $form_state['values']['column_number'],
  );

  $form['add_fields']['columns']['column_exposed'] = array(
    '#type' => 'checkbox',
    '#title' => t('Allow Column to be set for each Bulk Loading Job'),
    '#description' => t('Adds a textbox field to the Bulk Loader Page to allow users to set this value.'),
    '#default_value' => ($form_state['values']['column_exposed']) ? $form_state['values']['column_exposed'] : $template_field['exposed'],
  );

  $form['add_fields']['columns']['column_exposed_desc'] = array(
    '#type' => 'textfield',
    '#title' => t('Description for exposed field on bulk loading job'),
    '#description' => t('This description should tell the user what column should be entered here.'),
    '#default_value' => ($form_state['values']['column_exposed_desc']) ? $form_state['values']['column_exposed_desc'] : $template_field['exposed_description'],
  );

  // Global Value
  $form['add_fields']['constant'] = array(
    '#type' => 'fieldset',
    '#title' => t('Constant'),
    '#collapsible' => TRUE,
    '#collapsed' => ($field_type == 'constant')? FALSE : TRUE,
  );

  $form['add_fields']['constant']['constant_value'] = array(
    '#type' => 'textfield',
    '#title' => t('Constant Value'),
    '#description' => t('Specify the value you wish this field to have regardless of spreadsheet data.'),
    '#default_value' => $form_state['values']['constant_value']
  );

  $form['add_fields']['constant']['constant_exposed'] = array(
    '#type' => 'checkbox',
    '#title' => t('Allow Constant to be set for each Bulk Loading Job'),
    '#description' => t('Adds a textbox field to the Create Bulk Loader Form to allow users to set this value.')
  );

  $form['add_fields']['constant']['constant_validate'] = array(
    '#type' => 'checkbox',
    '#title' => t('Ensure value is in table'),
    '#description' => t('Checks the database when a bulk loading job is created to ensure the value entered already exists in the database.'),
  );

  // Foreign Key
  $form['add_fields']['foreign_key'] = array(
    '#type' => 'fieldset',
    '#title' => 'Foreign Key',
    '#collapsible' => TRUE,
    '#collapsed' => ($field_type == 'foreign key')? FALSE : TRUE,
  );

  $form['add_fields']['foreign_key']['foreign_record'] = array(
    '#type' => 'select',
    '#title' => 'Record to refer to',
    '#descripion' => 'Select the record that this foreign key shouold refer to. The record needs to already exist and be of the correct table.',
    '#options' => $fk_options,
  );

  // Chado Field
  $form['add_fields']['chado'] = array(
    '#type' => 'fieldset',
    '#title' => t('Chado Field/Column Details'),
    '#description' => t('Specify the Table/Field in chado that this field maps to.'),
  );

  $form['add_fields']['chado']['chado_table'] = array(
    '#type' => 'select',
    '#title' => t('Chado Table'),
    '#options' => $tables,
    '#default_value' => $table,
    '#ahah' => array(
      'path' => 'admin/tripal/tripal_bulk_loader_template/add_field_ahah',
      'wrapper' => 'tripal_bulk_loader_template-add_field',
      'effect' => 'fade'
      ),
  );

  $form['add_fields']['chado']['chado_field'] = array(
    '#type' => 'select',
    '#title' => t('Chado Field/Column'),
    '#options' => $chado_fields,
    '#default_value' => $form_state['values']['chado_field'],
    '#ahah' => array(
      'path' => 'admin/tripal/tripal_bulk_loader_template/add_field_ahah',
      'wrapper' => 'tripal_bulk_loader_template-add_field',
      'effect' => 'fade'
    ),
  );

  $form['add_fields']['additional'] = array(
    '#type' => 'fieldset',
    '#title' => 'Additional Options',
  );

  $form['add_fields']['additional']['required'] = array(
    '#type' => 'checkbox',
    '#title' => 'Make this file required',
  );

  $form['add_fields']['additional']['regex_transform'] = array(
    '#type' => 'fieldset',
    '#title' => 'Transform Spreadsheet Value Rules',
    '#collapsible' => TRUE,
    '#collapsed' => (!$form_state['storage']['regex']['pattern']) ? TRUE : FALSE,
  );

  $form['add_fields']['additional']['regex_transform']['regex_description'] = array(
    '#type' => 'item',
    '#value' => 'A transformation rule allows you to transform the original value '
      .'(usually from a user submitted spreadsheet) into the form you would like it stored '
      .'in the chado database. Each rule consists of a match pattern (a php regular expression '
      .'which determines which replacement patterns are applied and captures regions of the '
      .'original value) and a replacement pattern (a string which may contain capture references '
      .'that describes what the new value should be). Each rule is applied to the result of the '
      .'previous rule.'
  );

  $form['add_fields']['additional']['regex_transform']['regex-data'] = array(
    '#tree' => TRUE,
  );
  if (!$form_state['storage']['regex']['pattern']) {
    $form_state['storage']['regex']['pattern'] = array();
  }
  foreach ($form_state['storage']['regex']['pattern'] as $index => $pattern) {
    $data_element = array(
      'pattern' => array(
        '#type' => 'item',
        '#value' => $pattern,
      ),
      'replace' => array(
        '#type' => 'item',
        '#value' => $form_state['storage']['regex']['replace'][$index],
      ),
      'old_index' => array(
        '#type' => 'hidden',
        '#value' => $index,
      ),
      'new_index' => array(
        '#type' => 'select',
        '#options' => range(0, sizeof($form_state['storage']['regex']['pattern'])-1),
        '#default_value' => $index,
      ),
      'id' => array(
        '#type' => 'hidden',
        '#value' => $index,
      ),
      'submit-delete' => array(
        '#type' => 'submit',
        '#value' => 'Delete Transformation',
        '#name' => $index,
      ),
    );
    $form['add_fields']['additional']['regex_transform']['regex-data'][$index] = $data_element;
  }

  $form['add_fields']['additional']['regex_transform']['submit-reorder_regex'] = array(
    '#type' => ($form_state['storage']['regex']['pattern']) ? 'submit' : 'hidden',
    '#value' => 'Save Transformation Rule Order'
  );

  $form['add_fields']['additional']['regex_transform']['new_regex'] = array(
    '#type' => 'fieldset',
    '#title' => 'Add a new Transformation Rule',
  );

  $form['add_fields']['additional']['regex_transform']['new_regex']['pattern'] = array(
    '#type' => 'textfield',
    '#title' => 'Match Pattern',
    '#description' => 'You can use standard php regular expressions in this field to specify a '
      .'pattern. Only if this pattern matches the value in the spreadsheet does the replacement '
      .'pattern get applied to the value. To capture a section of your value for use in the '
      .'replacement patten surround with round brackets. For example, <i>GI:(\d+)</i> will match '
      .' NCBI gi numbers and will capture the numerical digits for use in the replacement pattern. '
      .' To match and capture any value use <i>.*</i>',
  );

  $form['add_fields']['additional']['regex_transform']['new_regex']['replace'] = array(
    '#type' => 'textfield',
    '#title' => 'Replacement Pattern',
    '#description' => 'This pattern should contain the text you want to replace the match pattern '
    .'mentioned above. It can include references of the form \n where n is the number of the '
    .'capture in the match pattern. For example, \1 will be replaced with the text matched in your '
    .'first set of round brackets.',
  );

  if ($field_type == 'table field') {
    $tab = '&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp';
    $form['add_fields']['additional']['regex_transform']['new_regex']['replace']['#description'] .= '<p>'
      .'The following references are also available for spreadsheet fields: <b><#column:<i>number</i>#></b>. '
      .'This allows you to substitute other spreadsheet values into the current field. For example, '
      .'if you had the following line:<br>'
      . $tab . 'SNP' . $tab . '15-Jan-2011' . $tab . '1' . $tab . '54' . $tab . 'Contig34355'
      .'<br> and your current field is for column #1 and you\'re inserting into the chado field '
      .'feature.uniquename then you might want to add in the data to ensure your uniquename is '
      .'unique. The Match Pattern is (.*) to select all the first column and the Replacement '
      .'Pattern could be \1_<#column:2#> which would insert SNP_15-Jan-2011 into the database.</p>';
  }

  $form['add_fields']['additional']['regex_transform']['new_regex']['submit-add_transform'] = array(
    '#type' => 'submit',
    '#value' => 'Add Transformation',
  );

  $form['add_fields']['additional']['regex_transform']['test_regex'] = array(
    '#type' => 'fieldset',
    '#title' => 'Test Transformation Rules',
  );

  $form['add_fields']['additional']['regex_transform']['test_regex']['test_string'] = array(
    '#type' => 'textfield',
    '#title' => 'Test Value',
    '#description' => 'This should be a value that you expect the above transformation rules '
      .'to be applied to.',
    '#default_value' => $form_state['storage']['test_regex_test'],
  );

  $form['add_fields']['additional']['regex_transform']['test_regex']['test_result'] = array(
    '#type' => 'textfield',
    '#title' => 'Test Result',
    '#description' => 'This is the value that would be saved to the database after the above transformation '
      .'riles were applied to the Test Value.',
    '#default_value' => $form_state['storage']['test_regex_result'],
  );

  $form['add_fields']['additional']['regex_transform']['test_regex']['submit-test'] = array(
    '#type' => 'submit',
    '#value' => 'Test Transformation Rules'
  );

  $form['add_fields']['submit-add_field'] = array(
      '#type' => 'submit',
      '#value' => 'Add Field'
  );

  $form['add_fields']['submit-cancel'] = array(
      '#type' => 'submit',
      '#value' => 'Cancel'
  );

  return $form;
}

/**
 * Add Field Submit
 *
 * @param $form
 *   The form that was submitted
 * @param $form_state
 *   The values and storage for the form
 */
function tripal_bulk_loader_add_template_field_form_submit($form, &$form_state) {

  $op = $form_state['values'][ $form_state['clicked_button']['#name'] ];

  if (!$form_state['ahah_submission']) {
    if ($op ==  'Add Field') {

      $template = $form_state['storage']['template_array'];

       // If new record
      if (preg_match('/NEW/', $form_state['values']['field_group'])) {
        $record_name = $form_state['values']['record_name'];
        $priority = sizeof($form_state['storage']['template_array']) + 1;
        $record2priority[$record_name] = $priority;
        $template[$priority]['table'] = $form_state['values']['chado_table'];
        $template[$priority]['record_id'] = $record_name;

      }
      else {
        $priority = $form_state['values']['field_group'];
        $record_name = $record2priority[$priority];
      }

      // Add field to template array
      if ($form_state['values']['field_type'] == 'table field') {
        $field = array(
          'type' => 'table field',
          'title' => $form_state['values']['field_title'],
          'field' => $form_state['values']['chado_field'],
          'required' => $form_state['values']['required'],
          //'allowed values' => empty by default,
          'spreadsheet sheet' => $form_state['values']['sheet_name'],
          'spreadsheet column' => $form_state['values']['column_number'],
          'exposed' => $form_state['values']['column_exposed'],
          'exposed_description' => $form_state['values']['column_exposed_desc'],
        );
      }
      elseif ($form_state['values']['field_type'] == 'constant') {
        $field = array(
          'type' => 'constant',
          'title' => $form_state['values']['field_title'],
          'field' => $form_state['values']['chado_field'],
          'required' => $form_state['values']['required'],
          //'allowed values' => empty by default,
          'constant value' => $form_state['values']['constant_value'],
          'exposed' => $form_state['values']['constant_exposed'],
          'exposed_validate' => $form_state['values']['constant_validate'],
        );
      }
      elseif ($form_state['values']['field_type'] == 'foreign key') {
        $field = array(
          'type' => 'foreign key',
          'title' => $form_state['values']['field_title'],
          'field' => $form_state['values']['chado_field'],
          'foreign key' => $form_state['values']['foreign_record'],
          'required' => $form_state['values']['required'],
        );
      }

      // Deal with any additional options
      if ($form_state['storage']['regex']) {
        $field['regex'] = $form_state['storage']['regex'];
      }

      // Save Template
      $template[$priority]['fields'][] = $field;
      $form_state['storage']['template']->template_array = serialize($template);
      $success = drupal_write_record('tripal_bulk_loader_template', $form_state['storage']['template'], array('template_id'));

      if ($success) {
        drupal_set_message('Successfully Added Field to Template');
        drupal_set_message('Template Saved.');

        $path = explode('?', $form_state['storage']['referring URL']);
        parse_str($path[1], $query);
        $query['template_id'] = $form_state['storage']['template']->template_id;
        drupal_goto($path[0], $query);
      }
      else {
        drupal_set_message('Unable to Save Template!', 'error');
        watchdog('T_bulk_loader',
          'Unable to save bulk loader template: %template',
          array('%template' => print_r($form_state['storage']['template'], TRUE)),
          WATCHDOG_ERROR
        );
      }
    }
    elseif ($op ==  'Cancel') {
        $path = explode('?', $form_state['storage']['referring URL']);
        parse_str($path[1], $query);
        $query['template_id'] = $form_state['storage']['template']->template_id;
        drupal_goto($path[0], $query);
    }
    elseif ($op == 'Add Transformation') {

      // Add transformation rule to original field
      $form_state['storage']['regex']['pattern'][] = '/' . $form_state['values']['pattern'] . '/';
      $form_state['storage']['regex']['replace'][] = $form_state['values']['replace'];
      drupal_set_message('Successfully Added Transformation Rule');

    }
    elseif ($op == 'Save Transformation Rule Order') {

      // Generate new regex array
      $new_regex = array();
      $old_regex = $form_state['storage']['regex'];
      foreach ($form_state['values']['regex-data'] as $key => $element) {
        $new_regex['pattern'][ $element['new_index'] ] = $old_regex['pattern'][ $element['old_index'] ];
        $new_regex['replace'][ $element['new_index'] ] = $old_regex['replace'][ $element['old_index'] ];
      }

      // sort new regex arrays
      asort($new_regex['pattern']);
      asort($new_regex['replace']);

      $form_state['storage']['regex'] = $new_regex;
    }
    elseif ($op == 'Delete Transformation') {

      // Unset regex rule
      $index = $form_state['clicked_button']['#name'];
      unset($form_state['storage']['regex']['pattern'][$index]);
      unset($form_state['storage']['regex']['replace'][$index]);

    }
    elseif ($op == 'Test Transformation Rules') {

      $patterns = $form_state['storage']['regex']['pattern'];
      $replaces = $form_state['storage']['regex']['replace'];
      $test_string = $form_state['values']['test_string'];
      $form_state['storage']['test_regex_result'] = preg_replace($patterns, $replaces, $test_string);
      $form_state['storage']['test_regex_test'] = $test_string;
    }
  }

}

/**
 * Edit Field Form
 *
 * This form is meant to be called from a bulk loader form. The following should be set
 * in the query section of the path:
 *  - template_id=\d+: the template which the edited field is part of
 *  - record_id=\d+: the priority or key in the template array of the record the field
 *      is currently part of
 *  - field_index=\d+: the key of the field in the fields array of the previously
 *      specified record
 *
 * @param $form_state
 *   Contains the values and storage for the form
 * @return
 *   A form array to be rendered by drupal_get_form
 */
function tripal_bulk_loader_edit_template_field_form(&$form_state = NULL) {
  $form = array();
   $form['#cache'] = TRUE; // Make sure the form is cached.

   // get template id from path
   $template_id = ($_GET['template_id']) ? $_GET['template_id'] : $form_state['values']['template_id'];

   // if there is no template supplied don't return rest of form
   if (!$template_id) {
     return $form;
   }

  // Pre-set Variables needed for form proper------------------------------------------

   // If this is the first load of the form (no form state) we need to initialize some variables
   if (!$form_state['storage']['template']) {
    $sql = "SELECT * FROM {tripal_bulk_loader_template} WHERE template_id=%d";
    $template = db_fetch_object(db_query($sql, $template_id));
    $form_state['storage']['template_array'] = unserialize($template->template_array);
    $form_state['storage']['template'] = $template;

    $form_state['storage']['record2priority'] = array();
    foreach ($form_state['storage']['template_array'] as $priority => $record_array) {
      if (!is_array($record_array)) {
         continue;
       }
      $form_state['storage']['record2priority'][$record_array['record_id']] = $priority;
    }

    $form_state['storage']['referring URL'] = $_SERVER["HTTP_REFERER"];
  }
  else {
    $template = $form_state['storage']['template'];
  }

  // get the field from the path
  if (!($_GET['record_id']===NULL || $_GET['field_index']===NULL)) {
    $priority = $_GET['record_id'];
    $field_index = $_GET['field_index'];
    $template_field = $form_state['storage']['template_array'][$priority]['fields'][$field_index];
    $form_state['storage']['original_field'] = $template_field;
    $form_state['storage']['original_field']['priority'] = $priority;
    $form_state['storage']['original_field']['field_index'] = $field_index;
  }

  $field_type = ($form_state['values']['field_type'])? $form_state['values']['field_type'] : $template_field['type'];

  // Tables and default table
  $tables = tripal_core_get_chado_tables();
  if ($form_state['values']) {
    $table = $form_state['values']['chado_table'];
  }
  else {
    $table = $form_state['storage']['template_array'][$priority]['table'];
  }


  // Fields and foreign key mappings
  $chado_fields = array();
  $fk_options = array();
  $fk_options['NULL'] = 'None';
  $table_description = module_invoke_all('chado_' . $table . '_schema');
  if ($field_type == 'foreign key') {
    $foreign_field2table = array();
    foreach ($table_description['foreign keys'] as $key_table => $key_array) {
      foreach ($key_array['columns'] as $left_field => $right_field) {
        $chado_fields[$left_field] = $left_field;
        $foreign_field2table[$left_field] = $key_table;
      }
    }
    reset($chado_fields);

    // set default field
    if (empty($chado_fields)) {
      $field = NULL;
    }
    elseif ($chado_fields[$form_state['values']['chado_field']]) {
      $field = $form_state['values']['chado_field'];
    }
    elseif ($template_field['field']) {
      $field = $template_field['field'];
    }
    else {
      $field = current($chado_fields);
    }
    //dpm($field, 'field');

    // Foreign key options
    $foreign_table = $foreign_field2table[$field];
    if ($foreign_table) {
      foreach ($form_state['storage']['record2priority'] as $record_name_ => $priority_ ) {
        if (preg_match('/^' . $foreign_table . '$/', $form_state['storage']['template_array'][$priority_]['table'])) {
          $fk_options[$record_name_] = $record_name_;
        }
      }
    }
  }
  else {
    foreach ($table_description['fields'] as $field_name => $field_array) {
        $chado_fields[$field_name] = $field_name;
    }
  }

//  dpm(array( 'tables' => $tables, 'default table' => $table, 'record name' => $record_name, 'priority' => $priority,
//    'fields' => $chad_fields, 'default field' => $field, 'foreign field=>table' => $foreign_field2table,
//    'table desc' => $table_description, 'foreign record options' => $fk_options, 'foreign table' => $foreign_table
//    ), 'Variables');

  // Start of Form Proper--------------------------------------------------------------

  $form['template_name'] = array(
    '#type' => 'item',
    '#title' => 'Template',
    '#value' => $template->name,
  );

  $form['template_id'] = array(
    '#type' => 'hidden',
    '#value' => $template_id,
  );

  $form['edit_fields'] = array(
    '#type' => 'fieldset',
    '#prefix' => '<div id="tripal_bulk_loader_template-edit_field">',
    '#suffix' => '</div>',
  );

  $form['edit_fields']['field_type'] = array(
    '#type' => 'radios',
    '#title' => t('Type of Field'),
    '#options' => array(
      'table field' => t('Spreadsheet: Fields which maps to a Spreadsheet Column'),
      'constant' => t('Constant: Field which remains Constant throughout the Spreadsheet'),
      'foreign key' => t('Foreign Key: Fields which map to a record in another table'),
    ),
    '#required' => TRUE,
    '#default_value' => $field_type,
    '#ahah' => array(
      'path' => 'admin/tripal/tripal_bulk_loader_template/edit_field_ahah',
      'wrapper' => 'tripal_bulk_loader_template-edit_field',
      'effect' => 'fade'
    ),
  );

  // check template array for records then edit one more
  if (!$form_state['storage']['record2priority']) {
    $groups = array();
  }
  else {
    $groups = array_flip($form_state['storage']['record2priority']);
  }
  $groups['NONE'] = 'Select a Record';
  $groups['NEW'] = 'New Record';
  $form['edit_fields']['field_group']  = array(
    '#type' => 'select',
    '#title' => 'Record',
    '#description' => 'This is used to group a set of fields together allowing '
      .'multiple records to be inserted into the same table per line of the spreadsheet',
    '#options' => $groups,
    '#default_value' => (preg_match('/(\d+|\w+)/', $form_state['values']['field_group'])) ? $form_state['values']['field_group'] : $priority,
    '#ahah' => array(
      'path' => 'admin/tripal/tripal_bulk_loader_template/edit_field_ahah',
      'wrapper' => 'tripal_bulk_loader_template-edit_field',
      'effect' => 'fade'
    ),
    '#required' => TRUE,
  );

  $form['edit_fields']['record_name'] = array(
    '#type' => (preg_match('/NEW/', $form_state['values']['field_group'])) ? 'textfield' : 'hidden',
    '#title' => 'Unique Record Name',
    '#prefix' => '<div id="tripal_bulk_loader_template-edit_record">',
    '#suffix' => '</div>',
    '#default_value' => $form_state['values']['record_name'],
  );

  $form['edit_fields']['field_title'] = array(
    '#type' => 'textfield',
    '#title' => t('Human-readable Title for Field'),
    '#default_value' => ($form_state['values']['field_title']) ? $form_state['values']['field_title'] : $template_field['title'],
  );

  // Spreadsheet column
  $form['edit_fields']['columns'] = array(
    '#type' => 'fieldset',
    '#title' => t('Spreadsheet Column'),
    '#collapsible' => TRUE,
    '#collapsed' => ($field_type == 'table field')? FALSE : TRUE,
  );

  $form['edit_fields']['columns']['sheet_name'] = array(
    '#type' => 'textfield',
    '#title' => t('Worksheet'),
    '#description' => t('Specify the name of the worksheet.'),
    '#size' => 5,
    '#default_value' => ($form_state['values']['sheet_name'])? $form_state['values']['sheet_name'] : $template_field['spreadsheet sheet'],
  );

  $form['edit_fields']['columns']['column_number'] = array(
    '#type' => 'textfield',
    '#title' => t('Column'),
    '#description' => t('Specify the column in the spreadsheet that this field maps to where the first column is 1.'),
    '#size' => 5,
    '#default_value' => ($form_state['values']['column_number']) ? $form_state['values']['column_number'] : $template_field['spreadsheet column'],
  );

  $form['edit_fields']['columns']['column_exposed'] = array(
    '#type' => 'checkbox',
    '#title' => t('Allow Column to be set for each Bulk Loading Job'),
    '#description' => t('Adds a textbox field to the Bulk Loader Page to allow users to set this value.'),
    '#default_value' => ($form_state['values']['column_exposed']) ? $form_state['values']['column_exposed'] : $template_field['exposed'],
  );

  $form['edit_fields']['columns']['column_exposed_desc'] = array(
    '#type' => 'textfield',
    '#title' => t('Description for exposed field on bulk loading job'),
    '#description' => t('This description should tell the user what column should be entered here.'),
    '#default_value' => ($form_state['values']['column_exposed_desc']) ? $form_state['values']['column_exposed_desc'] : $template_field['exposed_description'],
  );

  // Global Value
  $form['edit_fields']['constant'] = array(
    '#type' => 'fieldset',
    '#title' => t('Constant'),
    '#collapsible' => TRUE,
    '#collapsed' => ($field_type == 'constant')? FALSE : TRUE,
  );

  $form['edit_fields']['constant']['constant_value'] = array(
    '#type' => 'textfield',
    '#title' => t('Constant Value'),
    '#description' => t('Specify the value you wish this field to have regardless of spreadsheet data.'),
    '#default_value' => ($form_state['values']['constant_value']) ? $form_state['values']['constant_value'] : $template_field['constant value'],
  );

  $form['edit_fields']['constant']['constant_exposed'] = array(
    '#type' => 'checkbox',
    '#title' => t('Allow Constant to be set for each Bulk Loading Job'),
    '#description' => t('Adds a textbox field to the Create Bulk Loader Form to allow users to set this value.'),
    '#default_value' => ($form_state['values']['constant_exposed']) ? $form_state['values']['constant_exposed'] : $template_field['exposed'],
  );

  $form['edit_fields']['constant']['constant_validate'] = array(
    '#type' => 'checkbox',
    '#title' => t('Ensure value is in table'),
    '#description' => t('Checks the database when a bulk loading job is created to ensure the value entered already exists in the database.'),
    '#default_value' => ($form_state['values']['constant_validate']) ? $form_state['values']['constant_validate'] : $template_field['exposed_validate'],
  );

  // Foreign Key
  $form['edit_fields']['foreign_key'] = array(
    '#type' => 'fieldset',
    '#title' => 'Foreign Key',
    '#collapsible' => TRUE,
    '#collapsed' => ($field_type == 'foreign key')? FALSE : TRUE,
  );

  $form['edit_fields']['foreign_key']['foreign_record'] = array(
    '#type' => 'select',
    '#title' => 'Record to refer to',
    '#descripion' => 'Select the record that this foreign key shouold refer to. The record needs to already exist and be of the correct table.',
    '#options' => $fk_options,
  );

  // Chado Field
  $form['edit_fields']['chado'] = array(
    '#type' => 'fieldset',
    '#title' => t('Chado Field/Column Details'),
    '#description' => t('Specify the Table/Field in chado that this field maps to.'),
  );

  $form['edit_fields']['chado']['chado_table'] = array(
    '#type' => 'select',
    '#title' => t('Chado Table'),
    '#options' => $tables,
    '#default_value' => $table,
    '#ahah' => array(
      'path' => 'admin/tripal/tripal_bulk_loader_template/edit_field_ahah',
      'wrapper' => 'tripal_bulk_loader_template-edit_field',
      'effect' => 'fade'
      ),
  );

  $form['edit_fields']['chado']['chado_field'] = array(
    '#type' => 'select',
    '#title' => t('Chado Field/Column'),
    '#options' => $chado_fields,
    '#default_value' => ($form_state['values']['chado_field']) ? $form_state['values']['chado_field'] : $template_field['field'],
    '#ahah' => array(
      'path' => 'admin/tripal/tripal_bulk_loader_template/edit_field_ahah',
      'wrapper' => 'tripal_bulk_loader_template-edit_field',
      'effect' => 'fade'
    ),
  );

  $form['edit_fields']['additional'] = array(
    '#type' => 'fieldset',
    '#title' => 'Additional Options',
  );

  $form['edit_fields']['additional']['required'] = array(
    '#type' => 'checkbox',
    '#title' => 'Make this file required',
    '#default_value' => $template_field['required'],
  );

  $form['edit_fields']['additional']['regex_transform'] = array(
    '#type' => 'fieldset',
    '#title' => 'Transform Spreadsheet Value Rules',
    '#collapsible' => TRUE,
    '#collapsed' => (!$template_field['regex']['pattern']) ? TRUE : FALSE,
  );

  $transformation_msg = '<p>A transformation rule allows you to transform the original value '
      .'(usually from a user submitted spreadsheet) into the form you would like it stored '
      .'in the chado database. Each rule consists of a match pattern (a php regular expression '
      .'which determines which replacement patterns are applied and captures regions of the '
      .'original value) and a replacement pattern (a string which may contain capture references '
      .'that describes what the new value should be). Each rule is applied to the result of the '
      .'previous rule.<p>';
  $form['edit_fields']['additional']['regex_transform']['regex_description'] = array(
    '#type' => 'item',
    '#value' => $transformation_msg,
  );

  $form['edit_fields']['additional']['regex_transform']['regex-data'] = array(
    '#tree' => TRUE,
  );
  foreach ($template_field['regex']['pattern'] as $index => $pattern) {
    $data_element = array(
      'pattern' => array(
        '#type' => 'item',
        '#value' => $pattern,
      ),
      'replace' => array(
        '#type' => 'item',
        '#value' => $template_field['regex']['replace'][$index],
      ),
      'old_index' => array(
        '#type' => 'hidden',
        '#value' => $index,
      ),
      'new_index' => array(
        '#type' => 'select',
        '#options' => range(0, sizeof($template_field['regex']['pattern'])-1),
        '#default_value' => $index,
      ),
      'id' => array(
        '#type' => 'hidden',
        '#value' => $index,
      ),
      'submit-delete' => array(
        '#type' => 'submit',
        '#value' => 'Delete Transformation',
        '#name' => $index,
      ),
    );
    $form['edit_fields']['additional']['regex_transform']['regex-data'][$index] = $data_element;
  }

  $form['edit_fields']['additional']['regex_transform']['submit-reorder_regex'] = array(
    '#type' => 'submit',
    '#value' => 'Save Transformation Rule Order'
  );

  $form['edit_fields']['additional']['regex_transform']['new_regex'] = array(
    '#type' => 'fieldset',
    '#title' => 'Add a new Transformation Rule',
  );

  $form['edit_fields']['additional']['regex_transform']['new_regex']['pattern'] = array(
    '#type' => 'textfield',
    '#title' => 'Match Pattern',
    '#description' => 'You can use standard <b>php regular expressions</b> in this field to specify a '
      .'pattern. Only if this pattern matches the value in the spreadsheet does the replacement '
      .'pattern get applied to the value. To capture a section of your value for use in the '
      .'replacement patten surround with round brackets. For example, <i>GI:(\d+)</i> will match '
      .' NCBI gi numbers and will capture the numerical digits for use in the replacement pattern. '
      .' To match and capture any value use <i>.*</i>',
  );

  $form['edit_fields']['additional']['regex_transform']['new_regex']['replace'] = array(
    '#type' => 'textfield',
    '#title' => 'Replacement Pattern',
    '#description' => '<p>This pattern should contain the text you want to replace the match pattern '
    .'mentioned above. It can include references of the form <b>\n</b> where n is the number of the '
    .'capture in the match pattern. For example, \1 will be replaced with the text matched in your '
    .'first set of round brackets.</p>',
  );

  if ($field_type == 'table field') {
    $tab = '&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp';
    $form['edit_fields']['additional']['regex_transform']['new_regex']['replace']['#description'] .= '<p>'
      .'The following references are also available for spreadsheet fields: <b><#column:<i>number</i>#></b>. '
      .'This allows you to substitute other spreadsheet values into the current field. For example, '
      .'if you had the following line:<br>'
      . $tab . 'SNP' . $tab . '15-Jan-2011' . $tab . '1' . $tab . '54' . $tab . 'Contig34355'
      .'<br> and your current field is for column #1 and you\'re inserting into the chado field '
      .'feature.uniquename then you might want to add in the data to ensure your uniquename is '
      .'unique. The Match Pattern is (.*) to select all the first column and the Replacement '
      .'Pattern could be \1_<#column:2#> which would insert SNP_15-Jan-2011 into the database.</p>';
  }

  $form['edit_fields']['additional']['regex_transform']['new_regex']['submit-add_transform'] = array(
    '#type' => 'submit',
    '#value' => 'Add Transformation',
  );

  $form['edit_fields']['additional']['regex_transform']['test_regex'] = array(
    '#type' => 'fieldset',
    '#title' => 'Test Transformation Rules',
  );

  $form['edit_fields']['additional']['regex_transform']['test_regex']['test_string'] = array(
    '#type' => 'textfield',
    '#title' => 'Test Value',
    '#description' => 'This should be a value that you expect the above transformation rules '
      .'to be applied to.',
    '#default_value' => $form_state['storage']['test_regex_test'],
  );

  $form['edit_fields']['additional']['regex_transform']['test_regex']['test_result'] = array(
    '#type' => 'textfield',
    '#title' => 'Test Result',
    '#description' => 'This is the value that would be saved to the database after the above transformation '
      .'riles were applied to the Test Value.',
    '#default_value' => $form_state['storage']['test_regex_result'],
  );

  $form['edit_fields']['additional']['regex_transform']['test_regex']['submit-test'] = array(
    '#type' => 'submit',
    '#value' => 'Test Transformation Rules'
  );

  $form['edit_fields']['submit-edit_field'] = array(
      '#type' => 'submit',
      '#value' => 'Edit Field'
  );

  $form['edit_fields']['submit-cancel'] = array(
      '#type' => 'submit',
      '#value' => 'Cancel'
  );

  return $form;
}

/**
 * Edit Field Form Submit
 *
 * @param $form
 *   The form that was submitted
 * @param $form_state
 *   The values and storage for the form
 */
function tripal_bulk_loader_edit_template_field_form_submit($form, &$form_state) {

  $op = $form_state['values'][ $form_state['clicked_button']['#name'] ];
  //dpm($op, 'Operation Submitted');

  //Clear Test
  $form_state['storage']['test_regex_result'] = NULL;
  $form_state['storage']['test_regex_test'] = NULL;

  if (!$form_state['ahah_submission']) {
    if ($op ==  'Edit Field') {

      // If new record
      if (preg_match('/NEW/', $form_state['values']['field_group'])) {
        // add new record
        $record_name = $form_state['values']['record_name'];
        $priority = sizeof($form_state['storage']['template_array']) + 1;
        $old_priority = $form_state['storage']['original_field']['priority'];
        $field_index = $form_state['storage']['original_field']['field_index'];
        $form_state['storage']['record2priority'][$record_name] = $priority;
        $form_state['storage']['template_array'][$priority]['table'] = $form_state['values']['chado_table'];
        $form_state['storage']['template_array'][$priority]['record_id'] = $record_name;

      }
      else {
        $priority = $form_state['values']['field_group'];
        $old_priority = $form_state['storage']['original_field']['priority'];
        $field_index = $form_state['storage']['original_field']['field_index'];
        $record_name = $form_state['storage']['record2priority'][$priority];
      }

      $field = $form_state['storage']['original_field'];
      if ($form_state['values']['field_type'] == 'table field') {
          $field['type'] = 'table field';
          $field['title'] = $form_state['values']['field_title'];
          $field['field'] = $form_state['values']['chado_field'];
          $field['required'] = $form_state['values']['required'];
          //$field['allowed values'] = empty by default;
          $field['spreadsheet sheet'] = $form_state['values']['sheet_name'];
          $field['spreadsheet column'] = $form_state['values']['column_number'];
          $field['exposed'] = $form_state['values']['column_exposed'];
          $field['exposed_description'] = $form_state['values']['column_exposed_desc'];
      }
      elseif ($form_state['values']['field_type'] == 'constant') {
          $field['type'] = 'constant';
          $field['title'] = $form_state['values']['field_title'];
          $field['field'] = $form_state['values']['chado_field'];
          $field['required'] = $form_state['values']['required'];
          //$field['allowed values'] = empty by default;
          $field['constant value'] = $form_state['values']['constant_value'];
          $field['exposed_validate'] = $form_state['values']['constant_validate'];
          $field['exposed'] = $form_state['values']['constant_exposed'];
      }
      elseif ($form_state['values']['field_type'] == 'foreign key') {
          $field['type'] = 'foreign key';
          $field['title'] = $form_state['values']['field_title'];
          $field['field'] = $form_state['values']['chado_field'];
          $field['foreign key'] = $form_state['values']['foreign_record'];
          $field['required'] = $form_state['values']['required'];
      }

      // Deal with any additional options

      // if the record has changed...
      $form_state['storage']['template_array'][$priority]['table'] = $form_state['values']['chado_table'];
      if ($old_priority != $priority) {
        $form_state['storage']['template_array'][$priority]['fields'][] = $field;
        unset($form_state['storage']['template_array'][$old_priority]['fields'][$field_index]);

        // if there are no fields left delete the old record
        if (!$form_state['storage']['template_array'][$old_priority]['fields']) {
          unset($form_state['storage']['template_array'][$old_priority]);
        }
      }
      else {
        $form_state['storage']['template_array'][$priority]['fields'][$field_index] = $field;
      }

      // Save Template
      $form_state['storage']['template']->template_array = serialize($form_state['storage']['template_array']);
      $success = drupal_write_record('tripal_bulk_loader_template', $form_state['storage']['template'], array('template_id'));

      if ($success) {
        drupal_set_message('Successfully Updated Field');
        drupal_set_message('Template Saved.');

        $path = explode('?', $form_state['storage']['referring URL']);
        parse_str($path[1], $query);
        $query['template_id'] = $form_state['storage']['template']->template_id;
        drupal_goto($path[0], $query);
      }
      else {
        drupal_set_message('Unable to Save Template!', 'error');
        watchdog('T_bulk_loader',
          'Unable to save bulk loader template: %template',
          array('%template' => print_r($form_state['storage']['template'], TRUE)),
          WATCHDOG_ERROR
        );
      }

    }
    elseif ($op ==  'Cancel') {

        $path = explode('?', $form_state['storage']['referring URL']);
        parse_str($path[1], $query);
        $query['template_id'] = $form_state['storage']['template']->template_id;
        drupal_goto($path[0], $query);

    }
    elseif ($op == 'Add Transformation') {

      // Add transformation rule to original field
      $form_state['storage']['original_field']['regex']['pattern'][] = '/' . $form_state['values']['pattern'] . '/';
      $form_state['storage']['original_field']['regex']['replace'][] = $form_state['values']['replace'];

      // Add original field back into template
      $priority = $form_state['storage']['original_field']['priority'];
      $field_index = $form_state['storage']['original_field']['field_index'];
      $form_state['storage']['template_array'][$priority]['fields'][$field_index] = $form_state['storage']['original_field'];

      // Save Template
      $form_state['storage']['template']->template_array = serialize($form_state['storage']['template_array']);
      $success = drupal_write_record('tripal_bulk_loader_template', $form_state['storage']['template'], array('template_id'));

      if ($success) {
        drupal_set_message('Successfully Added Transformation Rule');
        drupal_set_message('Template Saved.');
      }
      else {
        drupal_set_message('Unable to Save Template!', 'error');
        watchdog('T_bulk_loader',
          'Unable to save bulk loader template: %template',
          array('%template' => print_r($form_state['storage']['template'], TRUE)),
          WATCHDOG_ERROR
        );
      }
    }
    elseif ($op == 'Save Transformation Rule Order') {

      // Generate new regex array
      $new_regex = array();
      $old_regex = $form_state['storage']['original_field']['regex'];
      foreach ($form_state['values']['regex-data'] as $key => $element) {
        $new_regex['pattern'][ $element['new_index'] ] = $old_regex['pattern'][ $element['old_index'] ];
        $new_regex['replace'][ $element['new_index'] ] = $old_regex['replace'][ $element['old_index'] ];
      }

      // sort new regex arrays
      asort($new_regex['pattern']);
      asort($new_regex['replace']);

      // Add back to original field
      $form_state['storage']['original_field']['regex'] = $new_regex;
      $priority = $form_state['storage']['original_field']['priority'];
      $field_index = $form_state['storage']['original_field']['field_index'];
      $form_state['storage']['template_array'][$priority]['fields'][$field_index] = $form_state['storage']['original_field'];

      // Save Template
      $form_state['storage']['template']->template_array = serialize($form_state['storage']['template_array']);
      $success = drupal_write_record('tripal_bulk_loader_template', $form_state['storage']['template'], array('template_id'));

      if ($success) {
        drupal_set_message('Successfully Reordered Transformation Rules');
        drupal_set_message('Template Saved.');
      }
      else {
        drupal_set_message('Unable to Save Template!', 'error');
        watchdog('T_bulk_loader',
          'Unable to save bulk loader template: %template',
          array('%template' => print_r($form_state['storage']['template'], TRUE)),
          WATCHDOG_ERROR
        );
      }
    }
    elseif ($op == 'Delete Transformation') {

      // Unset regex rule
      $index = $form_state['clicked_button']['#name'];
      unset($form_state['storage']['original_field']['regex']['pattern'][$index]);
      unset($form_state['storage']['original_field']['regex']['replace'][$index]);

      $priority = $form_state['storage']['original_field']['priority'];
      $field_index = $form_state['storage']['original_field']['field_index'];
      $form_state['storage']['template_array'][$priority]['fields'][$field_index] = $form_state['storage']['original_field'];

      // Save Template
      $form_state['storage']['template']->template_array = serialize($form_state['storage']['template_array']);
      $success = drupal_write_record('tripal_bulk_loader_template', $form_state['storage']['template'], array('template_id'));

      if ($success) {
        drupal_set_message('Successfully Reordered Transformation Rules');
        drupal_set_message('Template Saved.');
      }
      else {
        drupal_set_message('Unable to Save Template!', 'error');
        watchdog('T_bulk_loader',
          'Unable to save bulk loader template: %template',
          array('%template' => print_r($form_state['storage']['template'], TRUE)),
          WATCHDOG_ERROR
        );
      }

    }
    elseif ($op == 'Test Transformation Rules') {

      $patterns = $form_state['storage']['original_field']['regex']['pattern'];
      $replaces = $form_state['storage']['original_field']['regex']['replace'];
      $test_string = $form_state['values']['test_string'];
      $form_state['storage']['test_regex_result'] = preg_replace($patterns, $replaces, $test_string);
      $form_state['storage']['test_regex_test'] = $test_string;
    }
  }

}

//////////////////////////////////////////////////////////////////////////////////////
// AHAH Callbacks
//////////////////////////////////////////////////////////////////////////////////////

/**
 * AHAH Function: Replace $form['add_fields'] in tripal_bulk_loader_add_template_field_form
 *
 * @return
 *  JSON Data printed to the screen
 */
function tripal_bulk_loader_add_field_ahah() {

  $form_state = array('storage' => NULL, 'submitted' => FALSE);
  $form_build_id = $_POST['form_build_id'];
  $form = form_get_cache($form_build_id, $form_state);
  $args = $form['#parameters'];
  $form_id = array_shift($args);
  $form_state['post'] = $form['#post'] = $_POST;

  // Enable the submit/validate handlers to determine whether AHAH-submittted.
  $form_state['ahah_submission'] = TRUE;

  $form['#programmed'] = $form['#redirect'] = FALSE;
  drupal_process_form($form_id, $form, $form_state);
  $form = drupal_rebuild_form($form_id, $form_state, $args, $form_build_id);

  $form_element = $form['add_fields'];
  // Remove the wrapper so we don't double it up.
  //unset($form_element['#prefix'], $form_element['#suffix']);

  $output = theme('status_messages');
  $output .= drupal_render($form_element);

  // Final rendering callback.
  print drupal_json(array('status' => TRUE, 'data' => $output));
  exit();

}

/**
 * AHAH Function: Replace $form['edit_fields'] in tripal_bulk_loader_edit_template_field_form
 *
 * @return
 *  JSON Data printed to the screen
 */
function tripal_bulk_loader_edit_field_ahah() {

  $form_state = array('storage' => NULL, 'submitted' => FALSE);
  $form_build_id = $_POST['form_build_id'];
  $form = form_get_cache($form_build_id, $form_state);
  $args = $form['#parameters'];
  $form_id = array_shift($args);
  $form_state['post'] = $form['#post'] = $_POST;

  // Enable the submit/validate handlers to determine whether AHAH-submittted.
  $form_state['ahah_submission'] = TRUE;

  $form['#programmed'] = $form['#redirect'] = FALSE;
  drupal_process_form($form_id, $form, $form_state);
  $form = drupal_rebuild_form($form_id, $form_state, $args, $form_build_id);

  $form_element = $form['edit_fields'];
  // Remove the wrapper so we don't double it up.
  unset($form_element['#prefix'], $form_element['#suffix']);

  $output = theme('status_messages');
  $output .= drupal_render($form_element);

  // Final rendering callback.
  print drupal_json(array('status' => TRUE, 'data' => $output));
  exit();

}