<?php

require_once (__DIR__.'/image.php');

/**
 * Base class for image methods.
 **/
class Util
{
	var $app;
	var $dataDir;

	function __construct ($app)
	{
		$this->app = $app;
		$this->dataDir = _DATA_DIR .'/'. $app->getName () .'/image-db';
	}

	/**
	 * Loads information for specified schema.
	 *
	 * @param string $schema The schema name
	 **/
	function loadInfo ($schema)
	{
		$db = $this->app->getSysConn ();
	
		$info = $db->getRow (
			'SELECT id, max_width, max_height, `schema`, `table`, `column` 
				FROM image_schema WHERE name = #schema'
			,['schema' => $schema]
		);
		
		if (!$info)
			return NULL;

		$res = $db->query (
			'SELECT width, height, crop
				FROM image_schema_size WHERE image_schema_id = #id'
			,['id' => $info['id']]
		);
		
		$info['sizes'] = [];
		
		while ($r = $res->fetch_assoc ())
		{
			$size = "{$r['width']}x{$r['height']}";
			$info['sizes'][$size] = [
				'width' => $r['width'],
				'height' => $r['height'],
				'crop' => $r['crop']
			];
		}
		
		return $info;
	}
}