<?php

namespace Lychee\Modules;

final class Import {

	/**
	 * Creates an array similar to a file upload array and adds the photo to Lychee.
	 * @return boolean Returns true when photo import was successful.
	 */
	private function photo($path, $albumID = 0) {

		// No need to validate photo type and extension in this function.
		// $photo->add will take care of it.

		$info  = getimagesize($path);
		$size  = filesize($path);
		$photo = new Photo(null);

		$nameFile                = array(array());
		$nameFile[0]['name']     = $path;
		$nameFile[0]['type']     = $info['mime'];
		$nameFile[0]['tmp_name'] = $path;
		$nameFile[0]['error']    = 0;
		$nameFile[0]['size']     = $size;
		$nameFile[0]['error']    = UPLOAD_ERR_OK;

		if ($photo->add($nameFile, $albumID, true)===false) return false;
		return true;

	}

	/**
	 * @return boolean Returns true when successful.
	 */
	public function url($urls, $albumID = 0) {

		// Call plugins
		Plugins::get()->activate(__METHOD__, 0, func_get_args());

		$error = false;

		// Parse URLs
		$urls = str_replace(' ', '%20', $urls);
		$urls = explode(',', $urls);

		foreach ($urls as &$url) {

			// Validate photo type and extension even when $this->photo (=> $photo->add) will do the same.
			// This prevents us from downloading invalid photos.

			// Verify extension
			$extension = getExtension($url, true);
			if (!in_array(strtolower($extension), Photo::$validExtensions, true)) {
				$error = true;
				Log::error(Database::get(), __METHOD__, __LINE__, 'Photo format not supported (' . $url . ')');
				continue;
			}

			// Verify image
			$type = @exif_imagetype($url);
			if (!in_array($type, Photo::$validTypes, true)) {
				$error = true;
				Log::error(Database::get(), __METHOD__, __LINE__, 'Photo type not supported (' . $url . ')');
				continue;
			}

			$pathinfo = pathinfo($url);
			$filename = $pathinfo['filename'] . '.' . $pathinfo['extension'];
			$tmp_name = LYCHEE_DATA . $filename;

			if (@copy($url, $tmp_name)===false) {
				$error = true;
				Log::error(Database::get(), __METHOD__, __LINE__, 'Could not copy file (' . $tmp_name . ') to temp-folder (' . $tmp_name . ')');
				continue;
			}

			// Import photo
			if (!$this->photo($tmp_name, $albumID)) {
				$error = true;
				Log::error(Database::get(), __METHOD__, __LINE__, 'Could not import file (' . $tmp_name . ')');
				continue;
			}

		}

		// Call plugins
		Plugins::get()->activate(__METHOD__, 1, func_get_args());

		if ($error===false) return true;
		return false;

	}

	/**
	 * @return boolean|string Returns true when successful.
	 *                        Warning: Folder empty or no readable files to process!
	 *                        Notice: Import only contained albums!
	 */
	public function server($path, $albumID = 0) {

		// Parse path
		if (!isset($path))           $path = LYCHEE_UPLOADS_IMPORT;
		if (substr($path, -1)==='/') $path = substr($path, 0, -1);

		if (is_dir($path)===false) {
			Log::error(Database::get(), __METHOD__, __LINE__, 'Given path is not a directory (' . $path . ')');
			return false;
		}

		// Skip folders of Lychee
		if ($path===LYCHEE_UPLOADS_BIG||($path . '/')===LYCHEE_UPLOADS_BIG||
			$path===LYCHEE_UPLOADS_MEDIUM||($path . '/')===LYCHEE_UPLOADS_MEDIUM||
			$path===LYCHEE_UPLOADS_THUMB||($path . '/')===LYCHEE_UPLOADS_THUMB) {
				Log::error(Database::get(), __METHOD__, __LINE__, 'The given path is a reserved path of Lychee (' . $path . ')');
				return false;
		}

		$error              = false;
		$contains['photos'] = false;
		$contains['albums'] = false;

		// Call plugins
		// Note that updated albumId and path explicitly passed, rather
		// than using func_get_args() which will only return original ones
		Plugins::get()->activate(__METHOD__, 0, array($albumID, $path));

		// Get all files
		$files = glob($path . '/*');

		foreach ($files as $file) {

			// It is possible to move a file because of directory permissions but
			// the file may still be unreadable by the user
			if (!is_readable($file)) {
				$error = true;
				Log::error(Database::get(), __METHOD__, __LINE__, 'Could not read file or directory (' . $file . ')');
				continue;
			}

			if (@exif_imagetype($file)!==false) {

				// Photo

				$contains['photos'] = true;

				if ($this->photo($file, $albumID)===false) {
					$error = true;
					Log::error(Database::get(), __METHOD__, __LINE__, 'Could not import file (' . $file . ')');
					continue;
				}

			} else if (is_dir($file)) {

				// Folder

				$album              = new Album(null);
				$newAlbumID         = $album->add('[Import] ' . basename($file));
				$contains['albums'] = true;

				if ($newAlbumID===false) {
					$error = true;
					Log::error(Database::get(), __METHOD__, __LINE__, 'Could not create album in Lychee (' . $newAlbumID . ')');
					continue;
				}

				$import = $this->server($file . '/', $newAlbumID);

				if ($import!==true&&$import!=='Notice: Import only contains albums!') {
					$error = true;
					Log::error(Database::get(), __METHOD__, __LINE__, 'Could not import folder. Function returned warning.');
					continue;
				}

			}

		}

		// Call plugins
		// Note that updated albumId and path explicitly passed, rather
		// than using func_get_args() which will only return original ones
		Plugins::get()->activate(__METHOD__, 1, array($albumID, $path));

		// The following returns will be caught in the front-end
		if ($contains['photos']===false&&$contains['albums']===false) return 'Warning: Folder empty or no readable files to process!';
		if ($contains['photos']===false&&$contains['albums']===true)  return 'Notice: Import only contained albums!';

		if ($error===true) return false;
		return true;

	}

}

?>