<?php

/**
 * @file
 * Rules Scheduler tests.
 */

/**
 * Test cases for the Rules Scheduler module.
 */
class RulesSchedulerTestCase extends DrupalWebTestCase {

  /**
   * Declares test metadata.
   */
  public static function getInfo() {
    return array(
      'name' => 'Rules Scheduler tests',
      'description' => 'Test scheduling components.',
      'group' => 'Rules',
    );
  }

  /**
   * Overrides DrupalWebTestCase::setUp().
   */
  protected function setUp() {
    parent::setUp('rules_scheduler', 'rules_scheduler_test');
    RulesLog::logger()->clear();
    variable_set('rules_debug_log', TRUE);
  }

  /**
   * Tests scheduling components from the action.
   *
   * Note that this also makes sure Rules properly handles timezones, else this
   * test could fail due to a wrong 'now' timestamp.
   */
  public function testComponentSchedule() {
    $set = rules_rule_set(array(
      'node1' => array('type' => 'node', 'label' => 'node'),
    ));
    $set->rule(rule()->condition('node_is_published', array('node:select' => 'node1'))
                     ->action('node_unpublish', array('node:select' => 'node1'))
               );
    $set->integrityCheck()->save('rules_test_set_2');

    // Use different names for the variables to ensure they are properly mapped.
    $rule = rule(array(
      'node2' => array('type' => 'node', 'label' => 'node'),
    ));
    $rule->action('schedule', array(
      'component' => 'rules_test_set_2',
      'identifier' => 'node_[node2:nid]',
      'date' => 'now',
      'param_node1:select' => 'node2',
    ));

    $node = $this->drupalCreateNode(array('title' => 'The title.', 'status' => 1));
    $rule->execute($node);

    // Run cron to let the rules scheduler do its work.
    $this->cronRun();

    $node = node_load($node->nid, NULL, TRUE);
    $this->assertFalse($node->status, 'The component has been properly scheduled.');
    RulesLog::logger()->checkLog();
  }

  /**
   * Makes sure recursion prevention is working fine for scheduled rule sets.
   */
  public function testRecursionPrevention() {
    $set = rules_rule_set(array(
      'node1' => array('type' => 'node', 'label' => 'node'),
    ));
    $set->rule(rule()->condition('node_is_published', array('node:select' => 'node1'))
                     ->action('node_unpublish', array('node:select' => 'node1'))
               );
    $set->integrityCheck()->save('rules_test_set_2');

    // Add an reaction rule that is triggered upon a node save. The scheduled
    // component changes the node, thus it would be scheduled again and run in
    // an endless loop.
    $rule = rules_reaction_rule();
    $rule->event('node_insert');
    $rule->event('node_update');
    $rule->action('schedule', array(
      'component' => 'rules_test_set_2',
      'identifier' => 'test_recursion_prevention',
      'date' => 'now',
      'param_node1:select' => 'node',
    ));
    $rule->save();

    // Create a node, what triggers the rule.
    $node = $this->drupalCreateNode(array('title' => 'The title.', 'status' => 1));
    // Run cron to let the rules scheduler do its work.
    $this->cronRun();

    $node = node_load($node->nid, NULL, TRUE);
    $this->assertFalse($node->status, 'The component has been properly scheduled.');

    // Create a simple user account with permission to see the dblog.
    $user = $this->drupalCreateUser(array('access site reports'));
    $this->drupalLogin($user);

    // View the database log.
    $this->drupalGet('admin/reports/dblog');

    // Can't use
    // $this->clickLink('Rules debug information: " Scheduled evaluation...')
    // because xpath doesn't allow : or " in the string.
    // So instead, use our own xpath to figure out the href of the second link
    // on the page (the first link is the most recent log entry, which is the
    // log entry for the user login, above.)

    // All links.
    $links = $this->xpath('//a[contains(@href, :href)]', array(':href' => 'admin/reports/event/'));
    // Strip off /?q= from href.
    $href = explode('=', $links[1]['href']);
    // Click the link for the RulesLog entry.
    $this->drupalGet($href[1]);
    $this->assertRaw(RulesTestCase::t('Not evaluating reaction rule %unlabeled to prevent recursion.', array('unlabeled' => $rule->name)), "Scheduled recursion prevented.");
    RulesLog::logger()->checkLog();
  }

  /**
   * Tests that custom task handlers are properly invoked.
   */
  public function testCustomTaskHandler() {
    // Set up a scheduled task that will simply write a variable when executed.
    $variable = 'rules_schedule_task_handler_variable';
    rules_scheduler_schedule_task(array(
      'date' => REQUEST_TIME,
      'identifier' => '',
      'config' => '',
      'data' => array('variable' => $variable),
      'handler' => 'RulesTestTaskHandler',
    ));

    // Run cron to let the rules scheduler do its work.
    $this->cronRun();

    // The task handler should have set the variable to TRUE now.
    $this->assertTrue(variable_get($variable));
  }

}