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<?php
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/**
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 * @file
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 * Install, update, and uninstall functions for the ext_links module.
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 */
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/**
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 * Implements hook_schema().
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 */
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function ext_links_schema() {
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  $schema['ext_links'] = [
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    'description' => 'Table external link templates.',
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    'fields' => [
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      'id' => [
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        'type' => 'varchar',
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        'length' => 32,
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        'not null' => TRUE,
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        'default' => '',
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        'description' => 'Name of the ext_link being referenced.',
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      ],
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      'title' => [
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        'type' => 'varchar',
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        'length' => 255,
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        'not null' => TRUE,
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        'description' => 'The link title',
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      ],
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      'link' => [
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        'type' => 'varchar',
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        'length' => 255,
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        'not null' => TRUE,
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        'description' => 'The link url template',
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      ],
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      'glue' => [
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        'type' => 'varchar',
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        'length' => 10,
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        'not null' => TRUE,
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        'description' => 'The string to concatenate name parts in the URL query string',
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      ],
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      'category' => [
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        'type' => 'varchar',
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        'length' => 255,
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        'not null' => TRUE,
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        'description' => 'The link category',
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      ],
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      'weight' => [
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        'type' => 'int',
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        'not null' => TRUE,
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        'default' => 0,
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        'description' => 'Weight of filter within format.',
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      ],
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      'status' => [
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        'type' => 'int',
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        'not null' => TRUE,
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        'default' => 0,
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        'description' => 'External link enabled status. (1 = enabled, 0 = disabled)',
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      ],
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    ],
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    'primary key' => ['id'],
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    'indexes' => [
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      'list' => ['weight', 'id'],
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    ],
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  ];
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  return $schema;
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}
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/**
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 * implements hook_install()
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 */
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function ext_links_install() {
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  $links_templates = migrate_old_ext_links();
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  foreach ($links_templates as $ext_link){
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    db_delete('variable')
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      ->condition('name', "ext_links_" . $ext_link->id . '_%', 'LIKE')
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      ->execute();
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  }
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}
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/**
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 * Implements hook_uninstall().
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 */
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function hook_uninstall() {
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  db_drop_table('ext_links');
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}
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/**
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 * Migrates old ext link templates from drupal vars to the ext_link table.
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 */
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function migrate_old_ext_links(){
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  $links_templates = ext_links_templates();
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  foreach ($links_templates as $ext_link){
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    $ext_link = _ext_links_merge_old_vars($ext_link);
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    ext_links_save($ext_link);
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  }
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  return $links_templates;
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}
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/**
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 * Merge the old settings stored in drupal vars into the ext_link template object
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 * @param $ext_link object
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 *
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 * @return object
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 *  The ext link template
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 */
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function _ext_links_merge_old_vars($ext_link){
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  $ext_link_id = $ext_link->id;
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  $ext_link->status = variable_get("ext_links_${ext_link_id}_check", $ext_link->status);
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  $ext_link->link =  variable_get("ext_links_${ext_link_id}_link", $ext_link->link);
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  $ext_link->glue = variable_get("ext_links_${ext_link_id}_concat",   $ext_link->glue);
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  $ext_link->title = variable_get("ext_links_${ext_link_id}_text", $ext_link->title);
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  return $ext_link;
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}
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