<?php

/**
 * @file
 * Feature integration with String Overrides.
 */

/**
 * Implements hook_features_api().
 */
function stringoverrides_features_api() {
  return array(
    'stringoverrides' => array(
      'name' => t('String Overides'),
      'default_hook' => 'stringoverrides_features_defaults',
      'features_source' => TRUE,
      'file' => drupal_get_path('module', 'stringoverrides') . '/stringoverrides.features.inc',
    ),
  );
}

/**
 * Features callback; Retrieves the String Overrides defaults.
 */
function stringoverrides_features_defaults() {
  return array();
}

/**
 * Implements hook_features_export().
 */
function stringoverrides_features_export($data, &$export, $module_name) {
  foreach ($data as $name => $value) {
    // Split the unique component name into the language, context and override.
    list($lang, $context, $original) = explode(':', $name, 3);
    // Retrieve the value of the override within its context.
    $overrides = variable_get('locale_custom_strings_' . $lang, array());
    $override = $overrides[$context][$original];

    // Set up the exportable component value.
    $export['features']['stringoverrides'][$name] = $name;
    $export['dependencies']['stringoverrides'] = 'stringoverrides';
  }
  return array();
}

/**
 * Implements hook_features_export_options().
 */
function stringoverrides_features_export_options() {
  $options = array();

  // Retrieve all the enabled overrides for each given language.
  $result = db_select('variable', 'v')
    ->fields('v')
    ->condition('name', 'locale_custom_strings_%', 'LIKE')
    ->execute();

  // Go through all of the variables.
  foreach ($result as $variable) {
    // Retrieve each override set.
    $overrideset = variable_get($variable->name, array());
    $lang = str_replace('locale_custom_strings_', '', $variable->name);

    // Each override set first has the context.
    foreach ($overrideset as $context => $overrides) {
      // Each context contains all the overrides.
      foreach ($overrides as $original => $replacement) {
        // Constuct the unique name for the override.
        $name = $lang . ':' . $context . ':' . $original;
        $options[$name] = t('!lang: !original', array(
          '!lang' => $lang,
          '!original' => $original,
        ));
      }
    }
  }
  return $options;
}

/**
 * Implements hook_features_export_render().
 */
function stringoverrides_features_export_render($module_name, $data, $export = NULL) {
  $output = array();
  $code = '';
  foreach ($data as $index => $name) {
    // Split the unique component name into the language, context and override.
    list($lang, $context, $original) = explode(':', $name, 3);
    // Retrieve the value of the override within its context.
    $overrides = variable_get('locale_custom_strings_' . $lang, array());
    // Add the value of the override directly to the output.
    $replacement = $overrides[$context][$original];
    $code .= '  $stringoverrides[' . features_var_export($name) . '] = ' . features_var_export($replacement) . ";\n";
  }
  // Constuct the output code.
  $code .= '  return $stringoverrides;';
  return array('stringoverrides_defaults' => $code);
}

/**
 * Implements hook_features_export_revert().
 */
function stringoverrides_features_export_revert($module_name) {
  $stringoverrides = module_invoke_all($module_name, 'stringoverrides_defaults');
  if (!empty($stringoverrides)) {
    foreach ($stringoverrides as $name => $value) {
      // Split the unique component name into the language, context and override.
      list($lang, $context, $override) = explode(':', $name, 3);
      // Retrieve the value of the override within its context.
      $overrides = variable_get('locale_custom_strings_' . $lang, array());
      // Delete the override.
      unset($overrides[$context][$override]);
      variable_set('locale_custom_strings_' . $lang, $overrides);
    }
  }
}

/**
 * Implements hook_features_export_rebuild().
 */
function stringoverrides_features_export_rebuild($module_name) {
  $stringoverrides = module_invoke_all($module_name, 'stringoverrides_defaults');
  if (!empty($stringoverrides)) {
    foreach ($stringoverrides as $name => $value) {
      // Split the unique component name into the language, context and override.
      list($lang, $context, $override) = explode(':', $name, 3);
      $overrides = variable_get('locale_custom_strings_' . $lang, array());
      $overrides[$context][$override] = $value;
      variable_set('locale_custom_strings_' . $lang, $overrides);
    }
  }
}