<?php
/**
 * @brief cinecturlink2, a plugin for Dotclear 2
 * 
 * @package Dotclear
 * @subpackage Plugin
 * 
 * @author Jean-Christian Denis and Contributors
 * 
 * @copyright Jean-Christian Denis
 * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
 */

if (!defined('DC_RC_PATH')) {
    return null;
}

/**
 * @ingroup DC_PLUGIN_CINECTURLINK2
 * @brief Share media you like - main methods.
 * @since 2.6
 */
class cinecturlink2
{
    /** @var dcCore dcCore instance */
    public $core;
    /** @var dbLayer dbLayer instance */
    public $con;
    /** @var string Cinecturlink table name */
    public $table;
    /** @var string Blog ID */
    public $blog;

    /**
     * Contructor
     * 
     * @param dcCore $core dcCore instance
     */
    public function __construct(dcCore $core)
    {
        $core->blog->settings->addNamespace('cinecturlink2');

        $this->core = $core;
        $this->con = $core->con;
        $this->table = $core->prefix . 'cinecturlink2';
        $this->blog = $core->con->escape($core->blog->id);
    }

    /**
     * Get links
     * 
     * @param  array   $params     Query params
     * @param  boolean $count_only Count only result
     * @return record              record instance
     */
    public function getLinks($params = [], $count_only = false)
    {
        if ($count_only) {
            $strReq = 'SELECT count(L.link_id) ';
        } else {
            $content_req = '';
            if (!empty($params['columns']) && is_array($params['columns'])) {
                $content_req .= implode(', ', $params['columns']) . ', ';
            }

            $strReq =
            'SELECT L.link_id, L.blog_id, L.cat_id, L.user_id, L.link_type, ' .
            $content_req .
            'L.link_creadt, L.link_upddt, L.link_note, L.link_count, ' .
            'L.link_title, L.link_desc, L.link_author, ' .
            'L.link_lang, L.link_url, L.link_img, ' .
            'U.user_name, U.user_firstname, U.user_displayname, U.user_email, ' .
            'U.user_url, ' .
            'C.cat_title, C.cat_desc ';
        }

        $strReq .= 
        'FROM '. $this->table . ' L ' .
        'INNER JOIN ' . $this->core->prefix . 'user U ON U.user_id = L.user_id ' .
        'LEFT OUTER JOIN ' . $this->table . '_cat C ON L.cat_id = C.cat_id ';

        if (!empty($params['from'])) {
            $strReq .= $params['from'] . ' ';
        }

        $strReq .= "WHERE L.blog_id = '" . $this->blog . "' ";

        if (isset($params['link_type'])) {
            if (is_array($params['link_type']) && !empty($params['link_type'])) {
                $strReq .= 'AND L.link_type ' . $this->con->in($params['link_type']);
            } elseif ($params['link_type'] != '') {
                $strReq .= "AND L.link_type = '" . $this->con->escape($params['link_type']) . "' ";
            }
        } else {
            $strReq .= "AND L.link_type = 'cinecturlink' ";
        }

        if (!empty($params['link_id'])) {
            if (is_array($params['link_id'])) {
                array_walk($params['link_id'], function(&$v, $k){ if($v !== null) { $v = (integer) $v;}});
            } else {
                $params['link_id'] = [(integer) $params['link_id']];
            }
            $strReq .= 'AND L.link_id ' . $this->con->in($params['link_id']);
        }

        if (!empty($params['cat_id'])) {
            if (is_array($params['cat_id'])) {
                array_walk($params['cat_id'], function(&$v, $k) { if($v !== null) { $v = (integer) $v;}});
            } else {
                $params['cat_id'] = [(integer) $params['cat_id']];
            }
            $strReq .= 'AND L.cat_id ' . $this->con->in($params['cat_id']);
        }
        if (!empty($params['cat_title'])) {
            $strReq .= "AND C.cat_title = '" . $this->con->escape($params['cat_title']) . "' ";
        }

        if (!empty($params['link_title'])) {
            $strReq .= "AND L.link_title = '" . $this->con->escape($params['link_title']) . "' ";
        }

        if (!empty($params['link_lang'])) {
            $strReq .= "AND L.link_lang = '" . $this->con->escape($params['link_lang']) . "' ";
        }

        if (!empty($params['sql'])) {
            $strReq .= $params['sql'] . ' ';
        }

        if (!$count_only) {
            if (!empty($params['order'])) {
                $strReq .= 'ORDER BY ' . $this->con->escape($params['order']) . ' ';
            } else {
                $strReq .= 'ORDER BY L.link_upddt DESC ';
            }
        }

        if (!$count_only && !empty($params['limit'])) {
            $strReq .= $this->con->limit($params['limit']);
        }

        return $this->con->select($strReq);
    }

    /**
     * Add link
     * 
     * @param cursor $cur cursor instance
     */
    public function addLink(cursor $cur)
    {
        $this->con->writeLock($this->table);

        try {
            if ($cur->link_title == '') {
                throw new Exception(__('No link title'));
            }
            if ($cur->link_desc == '') {
                throw new Exception(__('No link description'));
            }
            if ('' == $cur->link_note) {
                $cur->link_note = 10;
            }
            if (0 > $cur->link_note || $cur->link_note > 20) {
                $cur->link_note = 10;
            }

            $cur->link_id = $this->getNextLinkId();
            $cur->blog_id = $this->blog;
            $cur->user_id = $this->core->auth->userID();
            $cur->link_creadt = date('Y-m-d H:i:s');
            $cur->link_upddt = date('Y-m-d H:i:s');
            $cur->link_pos = 0;
            $cur->link_count = 0;
            $cur->insert();
            $this->con->unlock();
        } catch (Exception $e) {
            $this->con->unlock();
            throw $e;
        }
        $this->trigger();

        # --BEHAVIOR-- cinecturlink2AfterAddLink
        $this->core->callBehavior('cinecturlink2AfterAddLink', $cur);

        return $cur->link_id;
    }

    /**
     * Update link
     * 
     * @param  integer $id       Link ID
     * @param  cursor  $cur      cursor instance
     * @param  boolean $behavior Call related behaviors
     */
    public function updLink($id, cursor $cur, $behavior = true)
    {
        $id = (integer) $id;

        if (empty($id)) {
            throw new Exception(__('No such link ID'));
        }

        $cur->link_upddt = date('Y-m-d H:i:s');

        $cur->update("WHERE link_id = " . $id . " AND blog_id = '" . $this->blog . "' ");
        $this->trigger();

        if ($behavior) {
            # --BEHAVIOR-- cinecturlink2AfterUpdLink
            $this->core->callBehavior('cinecturlink2AfterUpdLink', $cur, $id);
        }
    }

    /**
     * Delete link
     * 
     * @param  integer $id Link ID
     */
    public function delLink($id)
    {
        $id = (integer) $id;

        if (empty($id)) {
            throw new Exception(__('No such link ID'));
        }

        # --BEHAVIOR-- cinecturlink2BeforeDelLink
        $this->core->callBehavior('cinecturlink2BeforeDelLink', $id);

        $this->con->execute(
            'DELETE FROM ' . $this->table . ' ' .
            'WHERE link_id = ' . $id . ' ' .
            "AND blog_id = '" . $this->blog . "' "
        );

        $this->trigger();
    }

    /**
     * Get next link ID
     * 
     * @return integer Next link ID
     */
    private function getNextLinkId()
    {
        return $this->con->select(
            'SELECT MAX(link_id) FROM ' . $this->table . ' '
        )->f(0) + 1;
    }

    /**
     * Get categories
     * 
     * @param  array   $params     Query params
     * @param  boolean $count_only Count only result
     * @return record              record instance
     */
    public function getCategories($params = [], $count_only = false)
    {
        if ($count_only) {
            $strReq = 'SELECT count(C.cat_id) ';
        }
        else {
            $content_req = '';
            if (!empty($params['columns']) && is_array($params['columns'])) {
                $content_req .= implode(', ', $params['columns']) . ', ';
            }

            $strReq =
            'SELECT C.cat_id, C.blog_id, C.cat_title, C.cat_desc, ' .
            $content_req .
            'C.cat_pos, C.cat_creadt, C.cat_upddt ';
        }

        $strReq .= 'FROM ' . $this->table . '_cat C  ';

        if (!empty($params['from'])) {
            $strReq .= $params['from'] . ' ';
        }

        $strReq .= "WHERE C.blog_id = '" . $this->blog . "' ";

        if (!empty($params['cat_id'])) {
            if (is_array($params['cat_id'])) {
                array_walk($params['cat_id'], function(&$v, $k) { if($v !== null) { $v = (integer) $v; }});
            } else {
                $params['cat_id'] = [(integer) $params['cat_id']];
            }
            $strReq .= 'AND C.cat_id ' . $this->con->in($params['cat_id']);
        }

        if (isset($params['exclude_cat_id']) && $params['exclude_cat_id'] !== '') {
            if (is_array($params['exclude_cat_id'])) {
                array_walk($params['exclude_cat_id'], function (&$v, $k) { if ($v !== null) {$v = (integer) $v;}});
            } else {
                $params['exclude_cat_id'] = [(integer) $params['exclude_cat_id']];
            }
            $strReq .= 'AND C.cat_id NOT ' . $this->con->in($params['exclude_cat_id']);
        }

        if (!empty($params['cat_title'])) {
            $strReq .= "AND C.cat_title = '" . $this->con->escape($params['cat_title']) . "' ";
        }

        if (!empty($params['sql'])) {
            $strReq .= $params['sql'] . ' ';
        }

        if (!$count_only) {
            if (!empty($params['order'])) {
                $strReq .= 'ORDER BY ' . $this->con->escape($params['order']) . ' ';
            } else {
                $strReq .= 'ORDER BY cat_pos ASC ';
            }
        }

        if (!$count_only && !empty($params['limit'])) {
            $strReq .= $this->con->limit($params['limit']);
        }

        return $this->con->select($strReq);
    }

    /**
     * Add category
     * 
     * @param  cursor  $cur cursor instance
     * @return integer      New category ID
     */
    public function addCategory(cursor $cur)
    {
        $this->con->writeLock($this->table . '_cat');

        try {
            if ($cur->cat_title == '') {
                throw new Exception(__('No category title'));
            }
            if ($cur->cat_desc == '') {
                throw new Exception(__('No category description'));
            }

            $cur->cat_id = $this->getNextCatId();
            $cur->cat_pos = $this->getNextCatPos();
            $cur->blog_id = $this->blog;
            $cur->cat_creadt = date('Y-m-d H:i:s');
            $cur->cat_upddt = date('Y-m-d H:i:s');
            $cur->insert();
            $this->con->unlock();
        } catch (Exception $e) {
            $this->con->unlock();
            throw $e;
        }
        $this->trigger();

        return $cur->cat_id;
    }

    /**
     * Update category
     * 
     * @param  integer $id  Category ID
     * @param  cursor  $cur cursor instance
     */
    public function updCategory($id, cursor $cur)
    {
        $id = (integer) $id;

        if (empty($id)) {
            throw new Exception(__('No such category ID'));
        }

        $cur->cat_upddt = date('Y-m-d H:i:s');

        $cur->update("WHERE cat_id = " . $id . " AND blog_id = '" . $this->blog . "' ");
        $this->trigger();
    }

    /**
     * Delete category
     * 
     * @param  integer $id Category ID
     */
    public function delCategory($id)
    {
        $id = (integer) $id;

        if (empty($id)) {
            throw new Exception(__('No such category ID'));
        }

        $this->con->execute(
            'DELETE FROM ' . $this->table . '_cat ' .
            'WHERE cat_id = ' . $id . ' ' .
            "AND blog_id = '" . $this->blog . "' "
        );

        # Update link cat to NULL
        $cur = $this->con->openCursor($this->table);
        $cur->cat_id = NULL;
        $cur->link_upddt = date('Y-m-d H:i:s');
        $cur->update("WHERE cat_id = " . $id . " AND blog_id = '" . $this->blog . "' ");

        $this->trigger();
    }

    /**
     * Get next category ID
     * 
     * @return integer Next category ID
     */
    private function getNextCatId()
    {
        return $this->con->select(
            'SELECT MAX(cat_id) FROM ' . $this->table . '_cat '
        )->f(0) + 1;
    }

    /**
     * Get next category position
     * 
     * @return integer Next category position
     */
    private function getNextCatPos()
    {
        return $this->con->select(
            'SELECT MAX(cat_pos) FROM ' . $this->table . '_cat ' .
            "WHERE blog_id = '" . $this->blog . "' "
        )->f(0) + 1;
    }

    /**
     * Trigger event
     */
    private function trigger()
    {
        $this->core->blog->triggerBlog();
    }

    /**
     * Check if a directory exists and is writable
     * 
     * @param  string  $root   Root
     * @param  string  $folder Folder to create into root folder
     * @param  boolean $throw  Throw exception or not
     * @return boolean         True if exists and writable
     */
    public static function test_folder($root, $folder, $throw = false)
    {
        if (!is_dir($root . '/' . $folder)) {
            if (!is_dir($root) || !is_writable($root) || !mkdir($root . '/' . $folder)) {
                if ($throw) {
                    throw new Exception(__('Failed to create public folder for images.'));
                }
                return false;
            }
        }
        return true;
    }
}