<?php
ApplicationSettings::RegisterDefaultSetting("images", "upload_location", "images/uploads");
ApplicationSettings::RegisterDefaultSetting("images", "thumbnail_width", "480");
ApplicationSettings::RegisterDefaultSetting("images", "thumbnail_height", "360");

if (!file_exists(ApplicationSettings::GetSetting("images", "upload_location")))
	mkdir(ApplicationSettings::GetSetting("images", "upload_location"));

class Image extends DBObjectAutoCreate {
	public $Path,$ThumbnailPath;
	private $Filename,$TempFile;
	
	public static function IsValidType($ext){
		// use a switch because it's quicker than a loop
		switch (strtolower($ext)){
			case "bmp":
			case "dib":
			case "jpeg":
			case "jpg":
			case "jpe":
			case "jfif":
			case "gif":
			case "tif":
			case "tiff":
			case "png":
			case "ico":
				return true;
			default:
				return false;
		}
	}
	
	public static function GetImagesByAlbum($albumId) {
		self::CreateTable("images");
		$images=array();
		$prep=self::$PDO->prepare("SELECT image_id FROM images WHERE album_id=? AND image_deleted=0");
		$prep->execute(array($albumId));
		while ($imageId=$prep->fetchColumn())
			$images[]=new Image($imageId);
		return $images;
	}
	
	public function __construct($id=0,$tempFile="") {
		if (!is_numeric($id)){
			$this->Filename=$id;
			$this->TempFile=$tempFile;
			$id=0;
		}
		parent::__construct("images", "image_id", $id);
		
		if ($this->ImageId)
			$this->CalculatePaths();
	}
	
	private function CalculatePaths(){
		$dir=ApplicationSettings::GetSetting("images", "upload_location");
		$info=pathinfo($this->ImageFilename);
		$this->Path=$dir.'/'.$this->ImageFilename;
		$this->ThumbnailPath=$dir.'/'.$info['filename'].'.thumbnail.'.$info['extension'];
	}

	private function MakeFileName() {
		return $this->ImageId."_".Utils::MakeStringUrlSafe($this->Filename);
	}
	
	public function Save() {
		$newSave=!$this->ImageId;
		parent::Save();
		if ($newSave && $this->ImageId){
			$this->ImageFilename=$this->MakeFileName();
			$this->CalculatePaths();
			if(!move_uploaded_file($this->TempFile, $this->Path))
				throw new Exception("Unable to move uploaded file: ".$this->Path.', '.$this->TempFile);
			
			if (class_exists("Imagick")){
				$thumb=new Imagick($this->Path);
				$height=ApplicationSettings::GetSetting("images", "thumbnail_height");
				$width=ApplicationSettings::GetSetting("images", "thumbnail_width");
				$thumb->scaleImage(0,$height);
				$thumb->scaleImage($width,0);
				$thumb->writeImage($this->ThumbnailPath);
				$thumb->clear();
				$thumb->destroy();
			} else
				copy($this->Path, $this->ThumbnailPath);
			
			parent::Save();
		}
	}
}