<?php

/**
 * @file
 * API to manage the chado prop table for various Tripal Node Types
 *
 * How To Use:
 * @code

  function chado_example_form($form, &$form_state) {

    // Default values for form elements can come in the following ways:
    //
    // 1) as elements of the $node object.  This occurs when editing an existing node
    // 2) in the $form_state['values'] array which occurs on a failed validation or
    //    ajax callbacks when the ajax call originates from non-submit fields other
    //    than button
    // 3) in the $form_state['input'] array which occurs on ajax callbacks from submit
    //    form elements (e.g. buttons) and the form is being rebuilt but has not yet
    //    been validated
    //
    // The reference elements added by this function do use AJAX calls from buttons,
    // therefore, it is important to check for form values in the $form_state['values']
    // for case #2 above, and in the $form_state['input'] for case #3.
    // See the chado analysis node form for an example.


    // Next, add in all the form array definition particular to your node type

    // To add in the chado properties form elements, you first need to prepare the arguments
    // for the function call.

    $details = array(
      'property_table' => 'example_property',      // the name of the table linking additional properties to this node
      'chado_id_field' => 'example_id',          // key to link to the chado content created by this node
      'chado_id' => $example_id,             // the value of the above key
      'cv_name' => 'example_prop_cv',              // the name of the cv governing the _prop.type_id
      'fieldset_title' => 'Additional References', // the non-translated title for this fieldset
      'additional_instructions' => ''              // a non-stranslated string providing additional instructions
    );

    // Finally, and add the additional form elements to the form
    chado_add_node_form_properties($form, $form_state, $details);

    return $form;
  }

  function chado_example_insert($node) {

    // if there is an example_id in the $node object then this must be a sync so
    // we can skip adding the chado_example as it is already there, although
    // we do need to proceed with the rest of the insert
    if (!property_exists($node, 'example_id')) {

      // Add record to chado example table

      // Add to any other tables needed

      // Add all properties
      // Existing _property links will be cleared and then re-added
      tripal_api_chado_node_properties_form_update_properties(
        $node,                // the node object passed in via hook_insert()
        'example_property',   // the name of the _property linking table
        'example',            // the name of the base chado table for the node
        'example_id',         // key to link to the chado content created by this node
        $node->example_id     // value of the above key
      );
    }

    // Add record to chado_example linking example_id to new node

  }

  function chado_example_update($node) {


      // Update record in chado example table

      // Update any other tables needed

      // Update all properties
      // Existing _property links will be cleared and then re-added
      tripal_api_chado_node_properties_form_update_properties(
        $node,                // the node object passed in via hook_insert()
        'example_property',   // the name of the _property linking table
        'example',            // the name of the base chado table for the node
        'example_id',         // key to link to the chado content created by this node
        $node->example_id     // value of the above key
      );

    // Don't need to update chado_example linking table since niether example_id or nid can be changed in update

  }

 * @endcode
 *
 * @ingroup tripal_chado_node_api
 */

/**
 * Provides a form for adding to BASEprop table
 *
 * @param $form
 *   The Drupal form array into which the property form elements will be added
 * @param $form_state
 *   The corresponding form_state array for the form
 * @param $details
 *   An array defining details used by this form.
 *   Required keys that are always required:
 *     - property_table: the name of the property table (e.g.: featureprop, stockprop, etc.)
 *   Required keys for forms that update a record.
 *     - chado_id: the id of the record to which properties will be associated (e.g.: if a
 *       feature has a feature_id of 999 and we want to associate properties for that feature
 *       then the chado_id option should be 999)
 *   Require ONE of the following to identify the controlled vocabulary containing the properties to use:
 *     - cv_id: the unique key from the cv table
 *     - cv_name: the cv.name field uniquely identifying the controlled vocabulary
 *   Optional keys include:
 *     - chado_id_field: the foreign key field that links properties to the
 *       chado_id record. If this value is not specified it is determined using the
 *       traditional Chado naming scheme for property tables.
 *     - additional_instructions: provides additional instructions to the user
 *       for dealing with the property elements.  These instructions are appended
 *       to the default instructions
 *     - fieldset_title: An alternate name for the fieldset in which the properties
 *       form is placed. By default the title is 'Properties'.
 *     - default_properties:  An array of properties used to initialize the
 *       properties form.  Each property shoudl be represented as an array with
 *       the following keys and values:
 *          'cvterm':    The cvterm object for the property type
 *          'value':     The property value
 *     - select_options: an array of terms to use for the drop down select box.
 *       this array will be used rather than populating the drop down with terms
 *       from the named vocabulary.  The array must have keys with the cvterm_id
 *       and values with the cvterm name.
 *
 * @ingroup tripal_chado_node_api
 */

function chado_add_node_form_properties(&$form, &$form_state, $details) {

  // Set defaults for optional fields
  if (!array_key_exists('fieldset_title', $details)){
    $details['fieldset_title'] = 'Properties';
  }
  if (!array_key_exists('additional_instructions', $details)){
    $details['additional_instructions'] =  '';
  };
  if (!array_key_exists('default_properties', $details)){
    $details['default_properties'] =  array();
  };
  if (!is_array($details['default_properties'])) {
    drupal_set_message("The 'default_properties' option must be an array", "error");
    tripal_report_error('tcprops_form', TRIPAL_ERROR,
      "The 'default_properties' option must be an array",
      array());
    return;
  }

  // make sure the property table exists before proceeding.
  if (!chado_table_exists($details['property_table'])) {
    drupal_set_message("Cannot add property elements to the form. The property table, '" .
      $details['property_table'] . "', does not exists", "error");
    tripal_report_error('tcprops_form', TRIPAL_ERROR,
     "Cannot add property elements to the form. The property table, '%name', cannot be found.",
      array('%name' => $details['property_table']));
    return;
  }

  // if the chado_id_field is not specified then set it using the
  // typical chado naming scheme
  if (!array_key_exists('chado_id_field', $details)) {
    $chado_id_table = preg_replace('/prop$/', '', $details['property_table']);
    $chado_id_field = $chado_id_table . '_id';
    $details['chado_id_field'] = $chado_id_field;
  }

  // make sure the specified cv exists
  if (isset($details['cv_name'])) {
    // make sure the cv_name is real
    $result = chado_select_record('cv',array('cv_id'),array('name' => $details['cv_name']));
    if (count($result) == 0) {
      drupal_set_message("Cannot add property elements to the form. The CV name, '" .
        $details['cv_name'] . "', does not exists", "error");
      tripal_report_error('tcprops_form', TRIPAL_ERROR,
        "Cannot add property elements to the form. The CV named, '%name', cannot be found.",
        array('%name' => $details['cv_name']));
      return;
    }
    // add the cv_id option to the details array
    $details['cv_id'] = $result[0]->cv_id;
  }
  elseif (isset($details['cv_id'])) {
    // make sure the cv_id is real
    $result = chado_select_record('cv', array('name'), array('cv_id' => $details['cv_id']));
    if (count($result) == 0) {
      drupal_set_message("Cannot add property elements to the form. The CV ID, '" .
        $details['cv_id'] . "', does not exist", "error");
      tripal_report_error('tcprops_form', TRIPAL_ERROR,
        "Cannot add property elements to the form. The CV ID, '%id', cannot be found.",
        array('%id' => $details['cv_id']));
      return;
    }
    // add the cv_name option to the details array
    $details['cv_name'] = $result[0]->name;
  }
  else {

    // If we didn't get given a cv identifier, then try retrieving the default one
    // using the new cv defaults api
    $default_cv = tripal_get_default_cv($details['property_table'], 'type_id');
    if (!empty($default_cv)) {
      $details['cv_id'] = $default_cv->cv_id;
      $details['cv_name'] = $default_cv->name;
    }
    else {

      $default_form_link = l('vocabulary defaults configuration page',
          'admin/tripal/chado/tripal_cv/defaults',
          array('attributes' => array('target' => '_blank')));
      $message = "There is not a default vocabulary set for Property Types. Please set one using the $default_form_link.";

      if (preg_match('/(\w+)_id/',$details['chado_id_field'],$matches)) {
        $table = $matches[1];
        $table = ucwords(str_replace('_',' ',$table));
        $message = "There is not a default vocabulary set for $table Property Types. Please set one using the  $default_form_link.";
      }

      tripal_set_message($message, TRIPAL_WARNING);
      tripal_report_error('tcprops_form', TRIPAL_ERROR,
        "Please provide either a 'cv_name' or 'cv_id' as an option for adding properties to the form",
        array());
    }
    return;
  }

  // Get property types for the select list. If the user has provided a set
  // then use those, otherwise get them from the cvterm table for specified cv.
  if (array_key_exists('select_options', $details) and
      is_array($details['select_options'])) {
    $property_options = $details['select_options'];
  }
  // if the select options are not provided then try to get them on our own
  else {
    // if the vocabulary name is provided in the details then use that to
    // get the terms
    if (isset($details['cv_name'])) {
      $property_options = array();
      $property_options[] = 'Select a Property';
      $sql = "
        SELECT DISTINCT CVT.cvterm_id, CVT.name, CVT.definition, CV.cv_id as cv_id
        FROM  {cvterm} CVT
          INNER JOIN {cv} CV ON CVT.cv_id = CV.cv_id
        WHERE
          CV.name = :cv_name AND
          NOT CVT.is_obsolete = 1
        ORDER BY CVT.name ASC
      ";
      $prop_types = chado_query($sql, array(':cv_name' => $details['cv_name']));
      while ($prop = $prop_types->fetchObject()) {
        $property_options[$prop->cvterm_id] = $prop->name;
      }
    }
    // if the cv_id is set in the $details array then use that to get the terms
    elseif (isset($details['cv_id'])) {
      $property_options = array();
      $property_options[] = 'Select a Property';
      $sql = "
        SELECT DISTINCT CVT.cvterm_id, CVT.name, CVT.definition, CV.name as cv_name
        FROM  {cvterm} CVT
          INNER JOIN {cv} CV ON CVT.cv_id = CV.cv_id
        WHERE
          CV.cv_id = :cv_id AND
          NOT CVT.is_obsolete = 1
        ORDER BY CVT.name ASC
      ";
      $prop_types = chado_query($sql, array(':cv_id' => $details['cv_id']));
      while ($prop = $prop_types->fetchObject()) {
        $property_options[$prop->cvterm_id] = $prop->name;
      }
    }
  }

  // Tell tripal administrators how to add terms to the property types drop down.
  if (empty($property_options)) {
    $tripal_message = tripal_set_message(
      t('There are currently no property types! To add properties to the drop
        down list, you need to <a href="@cvtermlink">add a controlled vocabulary term</a>
        to the %cv_name controlled vocabulary.',
        array(
          '%cv_name' => $details['cv_name'],
          '@cvtermlink' => url('admin/tripal/chado/tripal_cv/cv/' . $details['cv_id'] . '/cvterm/add')
        )
      ),
      TRIPAL_NOTICE,
      array('return_html' => TRUE)
    );
  }
  else {
    $tripal_message = tripal_set_message(
      t('To add additional properties to the drop down list, you need to <a href="@cvtermlink">add
        a controlled vocabulary term</a> to the %cv_name controlled vocabulary.',
        array(
          '%cv_name' => $details['cv_name'],
          '@cvtermlink' => url('admin/tripal/chado/tripal_cv/cv/' . $details['cv_id'] . '/cvterm/add')
        )
      ),
      TRIPAL_INFO,
      array('return_html' => TRUE)
    );
  }

  // Group all of the chado node api fieldsets into vertical tabs.
  $form['chado_node_api'] = array(
    '#type' => 'vertical_tabs',
    '#attached' => array(
      'css' => array(
        'chado-node-api' => drupal_get_path('module', 'tripal_core') . '/theme/css/chado_node_api.css',
      ),
    ),
  );

  // the fieldset of the property elements
  $form['properties'] = array(
    '#type' => 'fieldset',
    '#title' => t($details['fieldset_title']),
    '#description' => t('Add properties by selecting a type
      from the dropdown, enter a value and click the "Add" button. To
      remove a property, click the remove button.' . $details['additional_instructions']),
    '#collapsible' => TRUE,
    '#collapsed' => TRUE,
    '#group' => 'chado_node_api',
    '#weight'      => 8,
    '#attributes' => array('class' => array('chado-node-api','properties')),
    '#attached' => array(
      'js' => array(
        'chado-node-api-vertical-tabs' => drupal_get_path('module', 'tripal_core') . '/theme/js/chadoNodeApi_updateVerticalTabSummary.js',
      ),
    ),
  );

  $form['properties']['admin_message'] = array(
    '#type' => 'markup',
    '#markup' => $tripal_message
  );

  // this form element is a tree, so that we don't puke all of the values into then node variable
  // it is set as a tree, and keeps them in the $form_state['values']['property_table'] heading.
  $form['properties']['property_table'] = array(
    '#type' => 'markup',
    '#tree' => TRUE,
    '#prefix' => '<div id="tripal-generic-edit-properties-table">',
    '#suffix' => '</div>',
    '#theme' => 'chado_node_properties_form_table'
  );

  // Add defaults into form_state to be used elsewhere
  $form['properties']['property_table']['details'] = array(
    '#type' => 'hidden',
    '#value' => serialize($details)
  );

  /* Properties can come to us in two ways:
   * 1) As entries in the $details['default_properties'] option
   *
   * 2) In the form state in the $form_state['chado_properties']. Data is in this field
   *    when an AJAX call updates the form state or a validation error.
   *
   * 3) Directly from the database if the record already has properties associated.  This
   *    data is only used the first time the form is loaded. On AJAX calls or validation
   *    errors the fields on the form are populated from the $form_state['chado_properties']
   *    entry.
   */
  if (isset($form_state['chado_properties'])) {
    $existing_properties = $form_state['chado_properties'];
  }
  else {

    // build the SQL for extracting properties already assigned to this record
    $sql_args = array();
    $sql_args[':chado_id'] = $details['chado_id'];
    if (array_key_exists('cv_name', $details)) {
      $cv_where = "CV.name = :cvname";
      $sql_args[':cvname'] = $details['cv_name'];
    }
    elseif (array_key_exists('cv_id', $details)) {
      $cv_where = "CV.cv_id = :cvid";
      $sql_args[':cvid'] = $details['cv_id'];
    }
    $existing_properties = chado_query(
      "SELECT
         PP.".$details['property_table']."_id property_id,
         CVT.cvterm_id as type_id,
         CVT.name as type_name,
         CVT.definition,
         PP.value,
         PP.rank
       FROM {" . $details['property_table'] . "} PP
         INNER JOIN {cvterm} CVT ON CVT.cvterm_id = PP.type_id
         INNER JOIN {cv} CV      ON CVT.cv_id     = CV.cv_id
       WHERE
         PP." . $details['chado_id_field'] . " = :chado_id AND
         $cv_where
       ORDER BY CVT.name, PP.rank", $sql_args)->fetchAll();

    // next add in any default properties
    if (array_key_exists('default_properties', $details)) {

      // next iterate through each of the default properties and create a new
      // stdClass array that contains the fields needed.
      foreach ($details['default_properties'] as $property) {
        $new_prop = new stdClass();
        $new_prop->type_id     = $property['cvterm']->cvterm_id;
        $new_prop->type_name   = $property['cvterm']->name;
        $new_prop->definition  = $property['cvterm']->definition;
        $new_prop->value       = $property['value'];
        $new_prop->property_id = 'TEMP' . uniqid();
        $new_prop->rank = 'TEMP' . uniqid();
        $existing_properties[] = $new_prop;
      }
    }
  }

  /* The format of the $existing_properties array is either:
   *
   * From the chado_properties array:
   * $form_state['chado_properties'] = array(
   *   '[type_id]-[rank]' => array(
   *     'type_id' => [the cvterm.cvterm_id value]
   *     'type_name' => [the cvterm.name value]
   *     'property_id' => [the property.property_id value, or temporary value if it doesn't yet exist],
   *     'value' => [the BASEprop.value value],
   *     'rank' => [the BASEprop.rank value or NULL if not saved yet],
   *   ),
   * );
   *
   * OR
   * Populated from the database:
   * $existing_property = array(
   *   0 => array(
   *     'property_id' => [the property.property_id value],
   *     'type_id' => [the cvterm.cvterm_id value]
   *     'type_name' => [the cvterm.name value]
   *     'value' => [the BASEprop.value value],
   *     'rank' => [the BASEprop.rank value],
   *   ),
   * );
   *
   * NOTE: The main difference is the key
   *
   * Loop on the array elements of the $existing_properties array and add
   * an element to the form for each one as long as it's also in the
   * $properties_options array.
   */
  $num_properties = 0;
  foreach ($existing_properties as $property) {
    if (array_key_exists($property->type_id, $property_options)) {
      $num_properties++;

      $form['properties']['property_table'][$property->type_id]['#type'] = 'markup';
      $form['properties']['property_table'][$property->type_id]['#value'] = '';

      $form['properties']['property_table'][$property->type_id][$property->property_id]['#type'] = 'markup';
      $form['properties']['property_table'][$property->type_id][$property->property_id]['#value'] = '';
      $form['properties']['property_table'][$property->type_id][$property->property_id]['#attributes'] = array(
        'class' => array('property', 'saved')
      );

      // Determine whether this property is unsaved or not.
      // We can tell this by looking at the property_id: if it's not
      // saved yet we will have entered a TEMP###.
      if (preg_match('/^TEMP/', $property->property_id)) {
        $form['properties']['property_table'][$property->type_id][$property->property_id]['#attributes'] = array(
          'class' => array('property', 'unsaved')
        );
      }

      $form['properties']['property_table'][$property->type_id][$property->property_id]['prop_type_id'] = array(
        '#type' => 'hidden',
        '#value' => $property->type_id
      );

      $form['properties']['property_table'][$property->type_id][$property->property_id]['prop_value'] = array(
        '#type' => 'hidden',
        '#value' => $property->value
      );

      $form['properties']['property_table'][$property->type_id][$property->property_id]['prop_rank'] = array(
        '#type' => 'hidden',
        '#value' => $property->rank
      );

      $form['properties']['property_table'][$property->type_id][$property->property_id]['property_id'] = array(
        '#type' => 'hidden',
        '#value' => $property->property_id
      );

      $form['properties']['property_table'][$property->type_id][$property->property_id]['type'] = array(
        '#type' => 'markup',
        '#markup' => $property->type_name
      );
      // If a definition is available we want to add that to the type column
      // to make it easier for users to determine what an added property means.
      if (isset($property->definition)) {
        $form['properties']['property_table'][$property->type_id][$property->property_id]['type']['#markup'] = $property->type_name . '<br><i>' . $property->definition . '</i>';
      }

      $form['properties']['property_table'][$property->type_id][$property->property_id]['value'] = array(
        '#type' => 'markup',
        '#markup' => $property->value,
      );

      $form['properties']['property_table'][$property->type_id][$property->property_id]['rank'] = array(
        '#type' => 'markup',
        '#markup' => $property->rank
      );
      // remove button
      $form['properties']['property_table'][$property->type_id][$property->property_id]['property_action'] = array(
        '#type' => 'submit',
        '#value' => t('Remove'),
        '#name' => "properties_remove-".$property->type_id.'-'.$property->property_id,
        '#ajax' => array(
          'callback' => "chado_add_node_form_subtable_ajax_update",
          'wrapper' => 'tripal-generic-edit-properties-table',
          'effect'   => 'fade',
          'method'   => 'replace',
          'prevent'  => 'click'
        ),
        // When this button is clicked, the form will be validated and submitted.
        // Therefore, we set custom submit and validate functions to override the
        // default node form submit.  In the validate function we validate only the
        // property fields and in the submit we remove the indicated property
        // from the chado_properties array. In order to keep validate errors
        // from the node form validate and Drupal required errors for non-property fields
        // preventing the user from removing properties we set the #limit_validation_errors below
        '#validate' => array('chado_add_node_form_subtables_remove_button_validate'),
        '#submit' => array('chado_add_node_form_subtables_remove_button_submit'),
        // Limit the validation of the form upon clicking this button to the property_table tree
        // No other fields will be validated (ie: no fields from the main form or any other api
        // added form).
        '#limit_validation_errors' => array(
          array('property_table')  // Validate all fields within $form_state['values']['property_table']
        ),
      );
    }
  }

  // Quickly add a hidden field stating how many properties are currently added.
  $form['properties']['num_properties'] = array(
    '#type' => 'hidden',
    '#value' => $num_properties,
    '#attributes' => array('class' => 'num-properties')
  );

  // Form elements for adding a new property
  //---------------------------------------------
  $form['properties']['property_table']['new'] = array(
    '#type' => 'markup',
    '#prefix' => '<span class="addtl-properties-add-new-property">',
    '#suffix' => '</span>'
  );

  // get the value selected (only works on AJAX call) and print the
  // description
  $type_desc = '';
  if (isset($form_state['input']['property_table']['new']['type'])) {
    $new_type_id = $form_state['input']['property_table']['new']['type'];
    $new_term = tripal_get_cvterm(array('cvterm_id' => $new_type_id));
    if ($new_term) {
      $type_desc = $new_term->definition;
    }
  }
  $form['properties']['property_table']['new']['type'] = array(
    '#type' => 'select',
    '#options' => $property_options, // Set at top of form
    '#prefix' => '<span id="tripal-generic-edit-properties-new-desc">',
    '#suffix' => '<i>' . $type_desc . '</i></span>',
    '#ajax' => array(
      'callback' => "chado_add_node_form_properties_ajax_desc",
      'wrapper' => 'tripal-generic-edit-properties-new-desc',
      'effect'   => 'fade',
      'method'   => 'replace',
    ),
  );

  $form['properties']['property_table']['new']['value'] = array(
    '#type' => 'textarea',
    '#rows' => 2,
  );

  // add button
  $form['properties']['property_table']['new']['property_action'] = array(
    '#type' => 'submit',
    '#value' => t('Add'),
    '#name' => "properties-add",
    '#ajax' => array(
      'callback' => "chado_add_node_form_subtable_ajax_update",
      'wrapper' => 'tripal-generic-edit-properties-table',
      'effect'   => 'fade',
      'method'   => 'replace',
      'prevent'  => 'click'
    ),
    // When this button is clicked, the form will be validated and submitted.
    // Therefore, we set custom submit and validate functions to override the
    // default node form submit.  In the validate function we validate only the
    // additional property fields and in the submit we add them to the chado_properties
    // array. In order to keep validate errors from the node form validate and Drupal
    // required errors for non-property fields preventing the user from adding properties we
    // set the #limit_validation_errors below
    '#validate' => array('chado_add_node_form_subtables_add_button_validate'),
    '#submit' => array('chado_add_node_form_subtables_add_button_submit'),
    // Limit the validation of the form upon clicking this button to the property_table tree
    // No other fields will be validated (ie: no fields from the main form or any other api
    // added form).
    '#limit_validation_errors' => array(
      array('property_table')  // Validate all fields within $form_state['values']['property_table']
    )
  );
}

/**
 * Validate the user input for creating a new property
 * Called by the add button in chado_add_node_form_properties
 *
 * @ingroup tripal_core
 */
function chado_add_node_form_properties_add_button_validate($form, &$form_state) {
  
  // Ensure the type_id is supplied & Valid
  $cvterm = chado_select_record(
    'cvterm',
    array('cvterm_id', 'name', 'definition'),
    array('cvterm_id' => $form_state['values']['property_table']['new']['type'])
  );
  if (!isset($cvterm[0])) {
    form_set_error('property_table][new][cvterm', 'Please select a property type before attempting to add a new property.');
  }
  else {
    $form_state['values']['property_table']['new']['type_name']  = $cvterm[0]->name;
    $form_state['values']['property_table']['new']['definition'] = $cvterm[0]->definition;
  }

  // Ensure value is supplied
  if (empty($form_state['values']['property_table']['new']['value'])) {
    form_set_error('property_table][new][value','You must enter the property value before attempting to add a new property.');
  }
}

/**
 * Called by the add button in chado_add_node_form_properties
 *
 * Create an array of properties in the form state. This array will then be
 * used to rebuild the form in subsequent builds
 *
 * @ingroup tripal_core
 */
function chado_add_node_form_properties_add_button_submit($form, &$form_state) {

  $details = unserialize($form_state['values']['property_table']['details']);

  // if the chado_additional_properties array is not set then this is the first time modifying the
  // property table. this means we need to include all the properties from the db
  if (!isset($form_state['chado_properties'])) {
    chado_add_node_form_properties_create_property_formstate_array($form, $form_state);
  }

  // get details for the new property
  $property = array(
    'type_id' => $form_state['values']['property_table']['new']['type'],
    'type_name' => $form_state['values']['property_table']['new']['type_name'],
    'definition' => $form_state['values']['property_table']['new']['definition'],
    'property_id' => 'TEMP' . uniqid(),
    'value' => $form_state['values']['property_table']['new']['value'],
    'rank' => 'TEMP' . uniqid(),
  );

  $key = $property['type_id'] . '-' . $property['property_id'];
  $form_state['chado_properties'][$key] = (object) $property;

  // we don't want the new element to pick up the values from the previous element so wipe them out
  unset($form_state['input']['property_table']['new']['type']);
  unset($form_state['input']['property_table']['new']['type_name']);
  unset($form_state['input']['property_table']['new']['definition']);
  unset($form_state['input']['property_table']['new']['value']);

}

/**
 * Called by the many remove buttons in chado_add_node_form_properties
 *
 * @ingroup tripal_core
 */
function chado_add_node_form_properties_remove_button_validate($form, &$form_state) {
  // No validation needed.
}

/**
 * Remove the correct property from the form
 * Called by the many remove buttons in chado_add_node_form_properties
 *
 * @ingroup tripal_core
 */
function chado_add_node_form_properties_remove_button_submit(&$form, &$form_state) {

  // if the chado_properties array is not set then this is the first time modifying the
  // property table. this means we need to include all the properties from the db
  if (!isset($form_state['chado_properties'])) {
    chado_add_node_form_properties_create_property_formstate_array($form, $form_state);
  }

  // remove the specified property from the form property table
  if(preg_match('/properties_remove-([^-]+-[^-]+)/',$form_state['triggering_element']['#name'],$match)) {
    $key = $match[1];
    if (array_key_exists($key, $form_state['chado_properties'])) {
      unset($form_state['chado_properties'][$key]);
    }
  }
}

function chado_add_node_form_properties_ajax_desc($form, $form_state) {
  return $form['properties']['property_table']['new']['type'];
}

/**
 * Creates an array in form_state containing the existing properties. This array is
 * then modified by the add/remove buttons and used as a source for rebuilding the form.
 * This function get's called at each button (add and remove) button submits the first
 * time one of the button's is clicked to instantiates the $form_state['chado_properties'] array
 *
 * $form_state['chado_properties'] = array(
 *   '[type_id]-[rank]' => array(
 *     'type_id' => [the cvterm.cvterm_id value]
 *     'type_name' => [the cvterm.name value]
 *     'property_id' => [the property.property_id value, or NULL if it doesn't yet exist],
 *     'value' => [the BASEprop.value value],
 *     'rank' => [the BASEprop.rank value],
 *   ),
 * );
 *
 * @ingroup tripal_core
 */
function chado_add_node_form_properties_create_property_formstate_array($form, &$form_state) {

  $form_state['chado_properties'] = array();

  foreach (element_children($form['properties']['property_table']) as $type_id) {
    if ($type_id != 'new') {
      foreach (element_children($form['properties']['property_table'][$type_id]) as $property_id) {
          $element = $form['properties']['property_table'][$type_id][$property_id];
          $property = array(
            'type_id' => $element['prop_type_id']['#value'],
            'type_name' => $element['type']['#markup'],
            'property_id' => $element['property_id']['#value'],
            'value' => $element['value']['#markup'],
            'rank' => $element['rank']['#markup']
          );
          $key = $property['type_id'] . '-' . $property['property_id'];
          $form_state['chado_properties'][$key] = (object) $property;
      }
    }
  }
}

/**
 * Function to theme the add/remove properties form into a table
 *
 * @ingroup tripal_chado_node_api
 */
function theme_chado_add_node_form_properties($variables) {
  $element = $variables['element'];

  $header = array(
    'type'            => array('data' => t('Type'),   'width' => '30%'),
    'value'           => array('data' => t('Value'),  'width' => '50%'),
    'property_action' => array('data' => t('Actions'),'width' => '20%'),
  );

  $rows = array();
  foreach (element_children($element) as $type_id) {
    if ($type_id == 'new') {
      $row = array();

        $row['data'] = array();
        foreach ($header as $fieldname => $title) {
          $row['data'][] = drupal_render($element[$type_id][$fieldname]);
        }
        $rows[] = $row;
    }
    else {
      foreach (element_children($element[$type_id]) as $version) {
        $row = array();

        $row['data'] = array();
        $row['class'] = $element[$type_id][$version]['#attributes']['class'];
        foreach ($header as $fieldname => $title) {
          $row['data'][] = drupal_render($element[$type_id][$version][$fieldname]);
        }
        $rows[] = $row;
      }
    }
  }

  return theme('table', array(
    'header' => $header,
    'rows' => $rows
  ));
}

/**
 * This function is used in a hook_insert, hook_update for a node form
 * when the chado node properties form has been added to the form.  It retrieves all of the properties
 * and returns them in an array of the format:
 *
 *   $dbxefs[<type_id>][<rank>] = <value>
 *
 * This array can then be used for inserting or updating properties
 *
 * @param $node
 *
 * @return
 *   A property array
 *
 * @ingroup tripal_chado_node_api
 */
function chado_retrieve_node_form_properties($node) {
  $properties = array();

  if (isset($node->property_table)) {
    foreach ($node->property_table as $type_id => $elements) {
      if ($type_id != 'new' AND $type_id != 'details') {
        foreach ($elements as $property_id => $element) {
          $properties[$type_id][$element['prop_rank']] = $element['prop_value'];
        }
      }
    }
  }

  return $properties;
}

/**
 * This function is used in hook_insert or hook_update and handles inserting of any new
 * properties
 *
 * @param $node
 *    The node passed into hook_insert & hook_update
 * @param $details
 *   - property_table: the name of the _property linking table (ie: feature_property)
 *   - base_table: the name of the base table (ie: feature)
 *   - foreignkey_name: the name of the foreign key used to link to the node content (ie: feature_id)
 *   - foreignkey_value: the value of the foreign key (ie: 445, if there exists a feature where feature_id=445)
 * @param $retrieved_properties
 *   An array of properties from chado_retrieve_node_form_properties($node). This can be used if you need
 *   special handling for some of the properties (See FeatureMap chado_featuremap_insert for an example)
 *
 * @ingroup tripal_chado_node_api
 */
function chado_update_node_form_properties($node, $details, $retrieved_properties = FALSE) {

  $details['foreignkey_value'] = (isset($details['foreignkey_value'])) ? $details['foreignkey_value'] : 0;

  if (isset($node->property_table) AND ($details['foreignkey_value'] > 0)) {
    // First remove existing property links
    chado_delete_record($details['property_table'], array($details['foreignkey_name'] => $details['foreignkey_value']));

    // Add back in property links and insert properties as needed
    if ($retrieved_properties) {
      $properties = $retrieved_properties;
    }
    else {
      $properties = chado_retrieve_node_form_properties($node);
    }
    foreach ($properties as $type_id => $ranks) {
      foreach ($ranks as $rank => $value) {

        if (preg_match('/^TEMP/', $rank)) {
          $rank = chado_get_table_max_rank(
            $details['property_table'],
            array(
              $details['foreignkey_name'] => $details['foreignkey_value'],
              'type_id' => $type_id
            )
          );
          $rank = strval($rank + 1);
        }
        $success = chado_insert_record(
          $details['property_table'],
          array(
            $details['foreignkey_name'] => $details['foreignkey_value'],
            'type_id' => $type_id,
            'value' => $value,
            'rank' => $rank
          )
        );

        if (!$success) {
          tripal_report_error('tripal_' . $details['base_table'], TRIPAL_ERROR,
            $details['base_table'] . ' Insert: Unable to insert property type_id %cvterm with value %value.',
            array('%cvterm' => $type_id, '%value' => $value));
        }
      }
    }
  }
}