<?php

/**

 * Implements hook_permission().

 */

function module_test_permission() {

  return array(

    'module_test perm' => t('example perm for module_test module'),

  );

}

/**

 * Implements hook_system_info_alter().

 *

 * Manipulate module dependencies to test dependency chains.

 */

function module_test_system_info_alter(&$info, $file, $type) {

  if (variable_get('dependency_test', FALSE) == 'missing dependency') {

    if ($file->name == 'forum') {

      // Make forum module depend on poll.

      $info['dependencies'][] = 'poll';

    }

    elseif ($file->name == 'poll') {

      // Make poll depend on a made-up module.

      $info['dependencies'][] = 'foo';

    }

  }

  elseif (variable_get('dependency_test', FALSE) == 'dependency') {

    if ($file->name == 'forum') {

      // Make the forum module depend on poll.

      $info['dependencies'][] = 'poll';

    }

    elseif ($file->name == 'poll') {

      // Make poll depend on php module.

      $info['dependencies'][] = 'php';

    }

  }

  elseif (variable_get('dependency_test', FALSE) == 'version dependency') {

    if ($file->name == 'forum') {

      // Make the forum module depend on poll.

      $info['dependencies'][] = 'poll';

    }

    elseif ($file->name == 'poll') {

      // Make poll depend on a specific version of php module.

      $info['dependencies'][] = 'php (1.x)';

    }

    elseif ($file->name == 'php') {

      // Set php module to a version compatible with the above.

      $info['version'] = '7.x-1.0';

    }

  }

  if ($file->name == 'seven' && $type == 'theme') {

    $info['regions']['test_region'] = t('Test region');

  }

}

/**

 * Implements hook_hook_info().

 */

function module_test_hook_info() {

  $hooks['test_hook'] = array(

    'group' => 'file',

  );

  return $hooks;

}

/**

 * Implements hook_menu().

 */

function module_test_menu() {

  $items['module-test/hook-dynamic-loading-invoke'] = array(

    'title' => 'Test hook dynamic loading (invoke)',

    'page callback' => 'module_test_hook_dynamic_loading_invoke',

    'access arguments' => array('access content'),

  );

  $items['module-test/hook-dynamic-loading-invoke-all'] = array(

    'title' => 'Test hook dynamic loading (invoke_all)',

    'page callback' => 'module_test_hook_dynamic_loading_invoke_all',

    'access arguments' => array('access content'),

  );

  return $items;

}

/**

 * Page callback for 'hook dynamic loading' test.

 *

 * If the hook is dynamically loaded correctly, the menu callback should

 * return 'success!'.

 */

function module_test_hook_dynamic_loading_invoke() {

  $result = module_invoke('module_test', 'test_hook');

  return $result['module_test'];

}

/**

 * Page callback for 'hook dynamic loading' test.

 *

 * If the hook is dynamically loaded correctly, the menu callback should

 * return 'success!'.

 */

function module_test_hook_dynamic_loading_invoke_all() {

  $result = module_invoke_all('test_hook');

  return $result['module_test'];

}

/**

 * Implements hook_modules_enabled().

 */

function module_test_modules_enabled($modules) {

  // Record the ordered list of modules that were passed in to this hook so we

  // can check that the modules were enabled in the correct sequence.

  variable_set('test_module_enable_order', $modules);

}

/**

 * Implements hook_modules_disabled().

 */

function module_test_modules_disabled($modules) {

  // Record the ordered list of modules that were passed in to this hook so we

  // can check that the modules were disabled in the correct sequence.

  variable_set('test_module_disable_order', $modules);

}

/**

 * Implements hook_modules_uninstalled().

 */

function module_test_modules_uninstalled($modules) {

  // Record the ordered list of modules that were passed in to this hook so we

  // can check that the modules were uninstalled in the correct sequence.

  variable_set('test_module_uninstall_order', $modules);

}

/**

 * Implements hook_module_implements_alter()

 */

function module_test_module_implements_alter(&$implementations, $hook) {

  if ($hook === 'altered_test_hook') {

    // Add a hook implementation, that will be found in

    // module_test.implementations.inc.

    $implementations['module_test'] = 'implementations';

  }

}