<?php
/**
 * This source file is part of the open source project
 * ExpressionEngine (https://expressionengine.com)
 *
 * @link      https://expressionengine.com/
 * @copyright Copyright (c) 2003-2022, Packet Tide, LLC (https://www.packettide.com)
 * @license   https://expressionengine.com/license Licensed under Apache License, Version 2.0
 */

namespace ExpressionEngine\Model\Comment;

use ExpressionEngine\Service\Model\Model;

/**
 * Comment Model
 *
 * A model representing a comment on a Channel entry.
 */
class Comment extends Model
{
    protected static $_primary_key = 'comment_id';
    protected static $_table_name = 'comments';

    protected static $_hook_id = 'comment';

    protected static $_relationships = array(
        'Site' => array(
            'type' => 'BelongsTo'
        ),
        'Entry' => array(
            'type' => 'BelongsTo',
            'model' => 'ChannelEntry'
        ),
        'Channel' => array(
            'type' => 'BelongsTo'
        ),
        'Author' => array(
            'type' => 'BelongsTo',
            'model' => 'Member',
            'from_key' => 'author_id',
            'to_key' => 'member_id'
        )
    );

    protected static $_validation_rules = array(
        'site_id' => 'required|isNatural',
        'entry_id' => 'required|isNatural',
        'channel_id' => 'required|isNatural',
        'author_id' => 'required|isNatural',
        'status' => 'enum[o,c,p,s]',
        'ip_address' => 'ip_address',
        'comment' => 'required',
    );

    protected static $_events = array(
        'afterInsert',
        'afterDelete',
        'afterUpdate',
    );

    protected $comment_id;
    protected $site_id;
    protected $entry_id;
    protected $channel_id;
    protected $author_id;
    protected $status;
    protected $name;
    protected $email;
    protected $url;
    protected $location;
    protected $ip_address;
    protected $comment_date;
    protected $edit_date;
    protected $comment;

    public function onAfterInsert()
    {
        // only update stats for open comments
        if ($this->status == 'o') {
            $this->updateCommentStats();
        }

        ee()->functions->clear_caching('all');
    }

    public function onAfterUpdate($changed)
    {
        if (isset($changed['status']) && $changed['status'] !== null) {
            $this->updateCommentStats();
        }
        ee()->functions->clear_caching('all');
    }

    public function onAfterDelete()
    {
        if ($this->Author) {
            // store the author and dissociate. otherwise saving the author will
            // attempt to save this entry to ensure relationship integrity.
            // TODO make sure everything is already dissociated when we hit this
            $last_author = $this->Author;
            $this->Author = null;

            $last_author->updateAuthorStats();
        }

        $this->updateCommentStats();
        ee()->functions->clear_caching('all');
    }

    private function updateCommentStats()
    {
        $site_id = ($this->site_id) ?: ee()->config->item('site_id');
        $now = ee()->localize->now;

        $comments = $this->getModelFacade()->get('Comment')
            ->filter('site_id', $site_id);

        $total_comments = $comments->count();

        $last_comment = $comments->filter('status', 'o')
            ->fields('comment_date')
            ->order('comment_date', 'desc')
            ->first();

        $last_comment_date = ($last_comment) ? $last_comment->comment_date : 0;

        $stats = $this->getModelFacade()->get('Stats')
            ->filter('site_id', $site_id)
            ->first();

        $stats->total_comments = $total_comments;
        $stats->last_comment_date = $last_comment_date;
        $stats->save();

        // entry won't exist if we deleted comments because we deleted the entry
        if ($this->Entry) {
            $entry_comments = $comments->filter('entry_id', $this->entry_id);

            // Update comment count and most recent date for the entry
            $total_entry_comments = $entry_comments->count();
            $recent_comment = $entry_comments->fields('comment_date')
                ->order('comment_date', 'desc')
                ->first();

            // There are times, espcially when deleting a ChannelEntry, that
            // the related entry object isn't fully loaded, so we'll need
            // to reload it before working on it.
            if (is_null($this->Entry->Channel)) {
                $this->getAssociation('Entry')->markForReload();
            }

            $this->Entry->comment_total = $total_entry_comments;
            $this->Entry->recent_comment_date = ($recent_comment) ? $recent_comment->comment_date : 0;
            $this->Entry->save();
        }

        // update member stats
        if ($this->Author) {
            $this->Author->updateAuthorStats();
        }
    }
}

// EOF
