<?php

/**
 * @file
 * This file contains all the functions which describe and implement drupal database tables
 * needed by this module. This module was developed by Chad N.A. Krilow and Lacey-Anne Sanderson,
 * University of Saskatchewan.
 *
 * The project manamgenet module allows you to sync data in a chado/Tripal instance with
 * multiple project/mysql instances as well as manage and create such project instances
 */

/**
 * Implementation of hook_install().
 */
function tripal_project_install() {
  drupal_install_schema('tripal_project');
}

/**
 * Implementation of hook_uninstall().
 */
function tripal_project_uninstall() {
  drupal_uninstall_schema('tripal_project');
}

/**
 * Implementation of hook_schema().
 */
function tripal_project_schema() {

  //specification for 'tripal_project_instances'
  $schema['chado_project'] = array(

    'fields' => array(

      //a int field that cannot be null and acts as a unique identifier for all nid's
      'nid' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        ),

      //a int field that cannot be null and is vid
      'vid' => array(
          'type' => 'int',
          'not null' => TRUE,
      ),

      //a intfield, not null and project_id is the unique_id of the project in chado
       'project_id' => array(
          'type' => 'int',
          'unsigned' => TRUE,
          'not null' => TRUE,
      ),


    ),//end of shema

    'primary key' => array('nid', 'vid', 'project_id'),

  );

  return $schema;
}

/**
 * Implementation of hook_requirements(). 
 *
 */
function tripal_project_requirements($phase) {
  $requirements = array();
  if ($phase == 'install') {
    // make sure chado is installed
    if (!tripal_core_is_chado_installed()) {
      $requirements ['tripal_project'] = array(
            'title' => "tripal_project",
            'value' => "ERROR: Chado most be installed before this module can be enabled",
            'severity' => REQUIREMENT_ERROR,
      );
    }
  }
  return $requirements;
}