<?php

/**
 * @file
 * Installation functions for Entity Translation module.
 */

/**
 * Implements hook_schema().
 */
function entity_translation_schema() {
  $schema = array();

  $schema['entity_translation'] = array(
    'description' => 'Table to track entity translations',
    'fields' => array(
      'entity_type' => array(
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The entity type this translation relates to',
      ),
      'entity_id' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'description' => 'The entity id this translation relates to',
      ),
      'revision_id' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'description' => 'The entity revision id this translation relates to',
      ),
      'language' => array(
        'type' => 'varchar',
        'length' => 32,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The target language for this translation.',
      ),
      'source' => array(
        'type' => 'varchar',
        'length' => 32,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The source language from which this translation was created.',
      ),
      'uid' => array(
        'description' => 'The author of this translation.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
      'status' => array(
        'description' => 'Boolean indicating whether the translation is published (visible to non-administrators).',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 1,
      ),
      'translate' => array(
        'description' => 'A boolean indicating whether this translation needs to be updated.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
      'created' => array(
        'description' => 'The Unix timestamp when the translation was created.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
      'changed' => array(
        'description' => 'The Unix timestamp when the translation was most recently saved.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
    ),
    'primary key' => array('entity_type', 'entity_id', 'language'),
  );

  $schema['entity_translation_revision'] = array(
    'description' => 'Table to track entity translation revisions',
    'fields' => array(
      'entity_type' => array(
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The entity type this translation revision relates to',
      ),
      'entity_id' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'description' => 'The entity id this translation revision relates to',
      ),
      'revision_id' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'description' => 'The entity revision id this translation relates to',
      ),
      'language' => array(
        'type' => 'varchar',
        'length' => 32,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The target language for this translation revision.',
      ),
      'source' => array(
        'type' => 'varchar',
        'length' => 32,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The source language from which this translation revision was created.',
      ),
      'uid' => array(
        'description' => 'The author of this translation revision.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
      'status' => array(
        'description' => 'Boolean indicating whether the translation revision is published (visible to non-administrators).',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 1,
      ),
      'translate' => array(
        'description' => 'A boolean indicating whether this translation revision needs to be updated.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
      'created' => array(
        'description' => 'The Unix timestamp when the translation revision was created.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
      'changed' => array(
        'description' => 'The Unix timestamp when the translation revision was most recently saved.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
    ),
    'primary key' => array('entity_type', 'revision_id', 'language'),
    'indexes'=> array('revision_id' => array('revision_id')),
  );

  return $schema;
}

/**
 * Implements hook_install().
 */
function entity_translation_install() {
  // entity_translation_form_alter() needs to run after locale_form_alter() and
  // translation_menu(); entity_translation_menu_alter() needs to run after
  // i18n_node_menu_alter().
  db_update('system')
    ->fields(array('weight' => 11))
    ->condition('name', 'entity_translation')
    ->execute();

  // Enable translation for nodes.
  variable_set('entity_translation_entity_types', array('node' => 'node'));

  // Make translation use the content language type.
  variable_set('translation_language_type', LANGUAGE_TYPE_CONTENT);

  // Enable revision support for entity translation.
  variable_set('entity_translation_revision_enabled', TRUE);
}

/**
 * Grant 'edit $type original values' permission to existing roles.
 */
function _entity_translation_grant_edit_permissions() {
  variable_set('entity_translation_workflow_enabled', TRUE);
  $permissions = array();

  // Nodes.
  $permissions['node'][] = 'bypass node access';
  foreach (node_permissions_get_configured_types() as $type) {
    $permissions['node'][] = "edit own $type content";
    $permissions['node'][] = "edit any $type content";
  }

  // Comments.
  if (module_exists('comment')) {
    $permissions['comment'][] = 'administer comments';
    $permissions['comment'][] = 'edit own comments';
  }

  // Taxonomy terms.
  if (module_exists('taxonomy')) {
    $permissions['taxonomy_term'][] = 'administer taxonomy';
    foreach (taxonomy_get_vocabularies() as $vocabulary) {
      $permissions['taxonomy_term'][] = "edit terms in {$vocabulary->vid}";
    }
  }

  $assignments = array();
  foreach ($permissions as $entity_type => $permissions_filter) {
    if (entity_translation_enabled($entity_type)) {
      $permission = "edit $entity_type original values";
      $assignments[] = _entity_translation_grant_permission($permission, $permissions_filter);
      $permission = "edit $entity_type translation shared fields";
      $assignments[] = _entity_translation_grant_permission($permission, $permissions_filter);
    }
  }
  $assignments = '<ul><li>' . implode('</li><li>', $assignments) . '</li></ul>';

  $t = get_t();
  return $t('The following permissions have been assigned to existing roles: !assignments', array('!assignments' => $assignments));
}

/**
 * Grant the given permission to all roles which already have any of the
 * permissions specified in the $permissions_filter parameter.
 *
 * @param $permission
 *   The new permission which to grant.
 * @param $permissions_filter
 *   List of permissions used for loading roles.
 *
 * @return
 *   A message describing permission changes.
 */
function _entity_translation_grant_permission($permission, $permissions_filter = NULL) {
  $roles = user_roles(FALSE, $permissions_filter);
  foreach ($roles as $rid => $role) {
    user_role_grant_permissions($rid, array($permission));
  }
  $t = get_t();
  return $t('%permission was assigned to %roles', array(
    '%permission' => $permission,
    '%roles' => implode(', ', $roles)
  ));
}

/**
 * Implements hook_enable().
 */
function entity_translation_enable() {
  // Re-activate entity translation for content types which had used it when
  // the module was last disabled (if any), unless these have since been altered
  // by the user to use a different translation option.
  $entity_translation_types = variable_get('entity_translation_disabled_content_types', array());
  foreach ($entity_translation_types as $index => $type) {
    if (variable_get("language_content_type_$type", 0) == 0) {
      variable_set("language_content_type_$type", ENTITY_TRANSLATION_ENABLED);
    }
    // We should show the warning only if we actually restored at least one
    // content type.
    else {
      unset($entity_translation_types[$index]);
    }
  }
  if ($entity_translation_types) {
    drupal_set_message(t('All content types previously configured to use field translation are now using it again.'), 'warning');
  }
  variable_del('entity_translation_disabled_content_types');
}

/**
 * Implements hook_disable().
 */
function entity_translation_disable() {
  // Store record of which types are using entity translation, and set those
  // types to not be translated. These content types will be reset to use entity
  // translation again if the module is later re-enabled, unless they have been
  // changed by the user in the meantime.
  $entity_translation_types = array();
  foreach (node_type_get_types() as $type => $object) {
    if (variable_get("language_content_type_$type", 0) == ENTITY_TRANSLATION_ENABLED) {
      $entity_translation_types[] = $type;
      variable_set("language_content_type_$type", 0);
    }
  }
  if ($entity_translation_types) {
    variable_set('entity_translation_disabled_content_types', $entity_translation_types);
    drupal_set_message(t('All content types configured to use field translation now have multilingual support disabled. This change will be reverted if the entity translation module is enabled again.'), 'warning');
  }
}

/**
 * Implements hook_uninstall().
 */
function entity_translation_uninstall() {
  db_delete('variable')
    ->condition('name', db_like('entity_translation_') . '%', 'LIKE')
    ->execute();

  variable_del('translation_language_type');
  variable_del('locale_field_language_fallback');
}

/**
 * Implements hook_update_N().
 */
function entity_translation_update_7001() {
  db_update('system')
    ->fields(array('weight' => 11))
    ->condition('name', 'entity_translation')
    ->execute();
}

/**
 * Grant 'edit original values' and 'edit shared field' permissions to roles which have entity editing permissions.
 */
function entity_translation_update_7002() {
  // Grant the 'edit original values' permission, so we don't break editing on
  // existing sites.
  return _entity_translation_grant_edit_permissions();
}

/**
 * Configure node and comment language settings to the prior default behavior.
 */
function entity_translation_update_7003() {
  module_load_include('inc', 'entity_translation', 'entity_translation.admin');
  foreach (array_keys(entity_get_info()) as $entity_type) {
    entity_translation_settings_init($entity_type);
  }
}

/**
 * Rebuild entity information to update the path scheme settings.
 */
function entity_translation_update_7004() {
  entity_info_cache_clear();
}

/**
 * Rebuild the class registry to pick up the translation handler factory class.
 */
function entity_translation_update_7005() {
  registry_rebuild();
}

/**
 * Add revision schema for entity translation metadata.
 */
function entity_translation_update_7006() {
  // Create revision id column.
  $spec = array(
    'type' => 'int',
    'unsigned' => TRUE,
    // If we have existing data we cannot enforce this to be NOT NULL.
    'not null' => FALSE,
    'description' => 'The entity revision id this translation relates to',
  );
  db_add_field('entity_translation', 'revision_id', $spec);

  // Create the entity translation revision schema.
  $table = array(
    'description' => 'Table to track entity translation revisions',
    'fields' => array(
      'entity_type' => array(
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The entity type this translation revision relates to',
      ),
      'entity_id' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'description' => 'The entity id this translation revision relates to',
      ),
      'revision_id' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'description' => 'The entity revision id this translation relates to',
      ),
      'language' => array(
        'type' => 'varchar',
        'length' => 32,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The target language for this translation revision.',
      ),
      'source' => array(
        'type' => 'varchar',
        'length' => 32,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The source language from which this translation revision was created.',
      ),
      'uid' => array(
        'description' => 'The author of this translation revision.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
      'status' => array(
        'description' => 'Boolean indicating whether the translation revision is published (visible to non-administrators).',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 1,
      ),
      'translate' => array(
        'description' => 'A boolean indicating whether this translation revision needs to be updated.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
      'created' => array(
        'description' => 'The Unix timestamp when the translation revision was created.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
      'changed' => array(
        'description' => 'The Unix timestamp when the translation revision was most recently saved.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
    ),
    'primary key' => array('entity_type', 'revision_id', 'language'),
    'indexes'=> array('revision_id' => array('revision_id')),
  );
  db_create_table('entity_translation_revision', $table);
}

/**
 * Disable revision support on existing installations.
 */
function entity_translation_update_7007() {
  // Revision support is not enabled by default on existing installations as
  // making it work implies copying translation metadata to the
  // {entity_translation_revision} table for all the existing translations.
  // Since this process cannot be reliably implemented in an update function,
  // we leave the choice of manually performing the upgrade to people with the
  // required skills to do so. Be aware that enabling revision support on sites
  // where data has not been manually migrated may cause translation metadata to
  // be permanently lost or corrupted. See https://www.drupal.org/node/2396103.
  variable_set('entity_translation_revision_enabled', FALSE);
}