<?php
/**
 * @copyright   2006-2013, Miles Johnson - http://milesj.me
 * @license     https://github.com/milesj/admin/blob/master/license.md
 * @link        http://milesj.me/code/cakephp/admin
 */

App::uses('ForumAppModel', 'Forum.Model');

/**
 * @property Forum $Forum
 * @property Topic $Topic
 * @property User $User
 * @property PostRating $PostRating
 */
class Post extends ForumAppModel {

    /**
     * Belongs to.
     *
     * @type array
     */
    public $belongsTo = array(
        'Forum' => array(
            'className' => 'Forum.Forum',
            'counterCache' => true
        ),
        'Topic' => array(
            'className' => 'Forum.Topic',
            'counterCache' => true
        ),
        'User' => array(
            'className' => USER_MODEL,
            'counterCache' => true
        )
    );

    /**
     * Has many.
     *
     * @type array
     */
    public $hasMany = array(
        'PostRating' => array(
            'className' => 'Forum.PostRating',
            'dependent' => true,
            'limit' => 25
        )
    );

    /**
     * Validation.
     *
     * @type array
     */
    public $validations = array(
        'default' => array(
            'forum_id' => array(
                'rule' => 'notEmpty'
            ),
            'topic_id' => array(
                'rule' => 'notEmpty'
            ),
            'user_id' => array(
                'rule' => 'notEmpty'
            ),
            'content' => array(
                'rule' => 'notEmpty'
            )
        )
    );

    /**
     * Admin settings.
     *
     * @type array
     */
    public $admin = array(
        'iconClass' => 'icon-comments',
        'editorFields' => array('content')
    );

    /**
     * Validate and add a post.
     *
     * @param array $data
     * @return bool|int
     */
    public function addPost($data) {
        $this->set($data);

        if ($this->validates()) {
            $settings = Configure::read('Forum.settings');
            $isAdmin = $this->Session->read('Acl.isAdmin');

            if (($secondsLeft = $this->checkFlooding($settings['postFloodInterval'])) > 0 && !$isAdmin) {
                return $this->invalid('content', 'You must wait %s more second(s) till you can post a reply', $secondsLeft);

            } else if ($this->checkHourly($settings['postsPerHour']) && !$isAdmin) {
                return $this->invalid('content', 'You are only allowed to post %s time(s) per hour', $settings['postsPerHour']);

            } else {
                $this->create();
                $this->save($data, false, array('topic_id', 'forum_id', 'user_id', 'userIP', 'content'));

                $data['post_id'] = $this->id;

                $this->Topic->update($data['topic_id'], array(
                    'lastPost_id' => $data['post_id'],
                    'lastUser_id' => $data['user_id'],
                ));

                $this->Topic->Forum->chainUpdate($data['forum_id'], array(
                    'lastTopic_id' => $data['topic_id'],
                    'lastPost_id' => $data['post_id'],
                    'lastUser_id' => $data['user_id']
                ));

                return $data['post_id'];
            }
        }

        return false;
    }

    /**
     * Save the first post with a topic.
     *
     * @param array $data
     * @return int
     */
    public function addFirstPost($data) {
        $this->create();

        $this->save(array(
            'topic_id' => $data['topic_id'],
            'forum_id' => $data['forum_id'],
            'user_id' => $data['user_id'],
            'userIP' => $data['userIP'],
            'content' => $data['content']
        ), false);

        return $this->id;
    }

    /**
     * Check the posting flood interval.
     *
     * @param int $interval
     * @return bool
     */
    public function checkFlooding($interval) {
        if ($posts = $this->Session->read('Forum.posts')) {
            $timeLeft = time() - array_pop($posts);

            if ($timeLeft <= $interval) {
                return $interval - $timeLeft;
            }
        }

        return false;
    }

    /**
     * Check the hourly posting.
     *
     * @param int $max
     * @return bool
     */
    public function checkHourly($max) {
        $pastHour = strtotime('-1 hour');

        if ($posts = $this->Session->read('Forum.posts')) {
            $count = 0;

            foreach ($posts as $time) {
                if ($time >= $pastHour) {
                    ++$count;
                }
            }

            if ($count >= $max) {
                return true;
            }
        }

        return false;
    }

    /**
     * Return a post based on ID.
     *
     * @param int $id
     * @return array
     */
    public function getById($id) {
        return $this->find('first', array(
            'conditions' => array('Post.id' => $id),
            'contain' => array(
                'Topic', 'User',
                'Forum' => array('Parent')
            ),
            'cache' => array(__METHOD__, $id)
        ));
    }

    /**
     * Return a list of IDs within a topic.
     *
     * @param int $topic_id
     * @return array
     */
    public function getIdsForTopic($topic_id) {
        return $this->find('list', array(
            'conditions' => array('Post.topic_id' => $topic_id),
            'order' => array('Post.id' => 'ASC')
        ));
    }

    /**
     * Return the latest posts by a user.
     *
     * @param int $user_id
     * @param int $limit
     * @return array
     */
    public function getLatestByUser($user_id, $limit = 5) {
        return $this->find('all', array(
            'conditions' => array('Post.user_id' => $user_id),
            'order' => array('Post.created' => 'DESC'),
            'limit' => $limit,
            'contain' => array(
                'Topic' => array('User')
            )
        ));
    }

    /**
     * Return the latest posts by a user, grouped by the topic ID.
     *
     * @param int $user_id
     * @param int $limit
     * @return array
     */
    public function getGroupedLatestByUser($user_id, $limit = 10) {
        return $this->find('all', array(
            'conditions' => array('Post.user_id' => $user_id),
            'order' => array('Post.created' => 'DESC'),
            'group' => array('Post.topic_id'),
            'limit' => $limit,
            'contain' => array(
                'Topic' => array('LastUser', 'LastPost', 'User')
            ),
            'cache' => array(__METHOD__, $user_id, $limit),
            'cacheExpires' => '+5 minutes'
        ));
    }

    /**
     * Get popular scoring posts by a user.
     *
     * @param int $user_id
     * @param int $limit
     * @return array
     */
    public function getPopularByUser($user_id, $limit = 10) {
        return $this->find('all', array(
            'conditions' => array('Post.user_id' => $user_id),
            'order' => array('Post.score' => 'DESC'),
            'limit' => $limit,
            'cache' => array(__METHOD__, $user_id, $limit),
            'cacheExpires' => '+5 minutes'
        ));
    }

    /**
     * Get popular scoring posts in a topic.
     *
     * @param int $topic_id
     * @param int $limit
     * @return array
     */
    public function getPopularInTopic($topic_id, $limit = 10) {
        return $this->find('all', array(
            'conditions' => array('Post.topic_id' => $topic_id),
            'order' => array('Post.score' => 'DESC'),
            'limit' => $limit,
            'contain' => array('User'),
            'cache' => array(__METHOD__, $topic_id, $limit),
            'cacheExpires' => '+5 minutes'
        ));
    }

    /**
     * Return a post for quoting.
     *
     * @param int $id
     * @return array
     */
    public function getQuote($id) {
        return $this->find('first', array(
            'conditions' => array('Post.id' => $id),
            'contain' => array('User')
        ));
    }

    /**
     * Return the latest posts in a topic.
     *
     * @param int $topic_id
     * @param int $limit
     * @return array
     */
    public function getTopicReview($topic_id, $limit = 10) {
        return $this->find('all', array(
            'conditions' => array('Post.topic_id' => $topic_id),
            'contain' => array('User'),
            'order' => array('Post.created' => 'DESC'),
            'limit' => $limit
        ));
    }

    /**
     * Increase the down ratings.
     *
     * @param int $id
     * @return bool
     */
    public function rateDown($id) {
        $down = (int) Configure::read('Forum.settings.rateDownPoints');

        return $this->updateAll(
            array('Post.down' => 'Post.down + ' . $down, 'Post.score' => 'Post.score - ' . $down),
            array('Post.id' => $id)
        );
    }

    /**
     * Increase the up ratings.
     *
     * @param int $id
     * @return bool
     */
    public function rateUp($id) {
        $up = (int) Configure::read('Forum.settings.rateUpPoints');

        return $this->updateAll(
            array('Post.up' => 'Post.up + ' . $up, 'Post.score' => 'Post.score + ' . $up),
            array('Post.id' => $id)
        );
    }

    /**
     * Move all posts to a new forum.
     *
     * @param int $start_id
     * @param int $moved_id
     * @return bool
     */
    public function moveAll($start_id, $moved_id) {
        return $this->updateAll(
            array('Post.forum_id' => $moved_id),
            array('Post.forum_id' => $start_id)
        );
    }

    /**
     * Parse the HTML version.
     *
     * @param array $options
     * @return bool
     */
    public function beforeSave($options = array()) {
        return $this->validateDecoda('Post');
    }

    /**
     * Null associations.
     */
    public function afterDelete() {
        $this->Forum->updateAll(
            array('Forum.lastPost_id' => null),
            array('Forum.lastPost_id' => $this->id)
        );

        $this->Topic->updateAll(
            array('Topic.firstPost_id' => null),
            array('Topic.firstPost_id' => $this->id)
        );

        $this->Topic->updateAll(
            array('Topic.lastPost_id' => null),
            array('Topic.lastPost_id' => $this->id)
        );
    }

}