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upload mass deface mass delete console info server
name : Model.php
 <?php

class GridGallery_Installer_Model extends GridGallery_Core_BaseModel
{
    /**
     * Cheks whether the specified table exists.
     * @param  string $tableName Table name.
     * @return bool
     */
    public function tableExists($tableName)
    {
        $prefix = $this->db->prefix;
        $table = str_replace('{prefix}', $prefix, $tableName);

        $query = 'SHOW TABLES LIKE \'' . $table . '\'';

        $result = $this->db->get_results($query);

        return (count($result) > 0 ? true : false);
    }

    /**
     * Replace {prefix} with the current database prefix.
     * @param  string $table Table name or query.
     * @return string
     */
    public function prefix($table)
    {
        return str_replace('{prefix}', $this->db->prefix, $table);
    }

    /**
     * Install plugin.
     * @param  array $queries An array of the queries.
     * @return bool
     */
    public function install($queries)
    {
        if (!is_array($queries)) {
            return false;
        }

        foreach ($queries as $table => $query) {
            if($this->isCreateTable($table)) {
                $this->delta($this->prefix($query));
            }
        }

        return true;
    }

    /**
     * Uninstall plugin.
     * @param  array $queries An array of the queries.
     * @return bool
     */
    public function drop($queries)
    {
        if (!is_array($queries)) {
            return false;
        }

        foreach ($queries as $table => $query) {
            if($this->isCreateTable($table)) {
                $this->dropTable($table);
            }
        }

        return true;
    }

    /**
     * Updates the database.
     * @param  array $queries An array of the queries.
     */
    public function update($queries)
    {
        foreach ($queries as $table => $query) {
            if($this->isCreateTable($table)) {
                if(!$this->tableExists($table)) {
				    $this->delta($this->prefix($query));
                }
            } else {
                $this->alterTable($table, $this->prefix($query));
            }
        }
    }

    public function isCreateTable($table)
    {
        return strpos($table, '{prefix}') === 0;
    }

    public function alterTable($params, $query)
    {
        $parts = explode(':', $params);
        if(sizeof($parts) != 3) return;

        if($parts[0] == 'altercolumn') {
            $existsColumn = $this->db->get_results('Show columns from `'.str_replace('{prefix}', $this->db->prefix, $parts[2]).'` like \''.$parts[1].'\'');
            if(!$this->db->last_error && (!isset($existsColumn) || !is_array($existsColumn) || sizeof($existsColumn) == 0)) {
                $this->db->query($query);
            }
        }      
    }

    protected function dropTable($table)
    {
        $importantTable = array(
            $this->prefix('{prefix}gg_photos'),
            $this->prefix('{prefix}gg_galleries_resources'),
            $this->prefix('{prefix}gg_settings_sets'),
            $this->prefix('{prefix}gg_galleries'),
            $this->prefix('{prefix}gg_tags'),
            $this->prefix('{prefix}gg_attributes'),
        );
        if(!in_array($this->prefix($table), $importantTable)){
            $query = 'DROP TABLE IF EXISTS ' . $this->prefix($table);
            $this->db->query($query);
        }
    }
}
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