#
# 対応サムネイルを追加するコード
#

# exclude 'mp4' and 'webm'
$config['ffmpeg_ext_files'][] = 'flv';
$config['ffmpeg_ext_files'][] = 'wmv';
$config['ffmpeg_ext_files'][] = 'asf';
$config['ffmpeg_ext_files'][] = 'mpeg';
$config['ffmpeg_ext_files'][] = 'mpg';
$config['ffmpeg_ext_files'][] = 'avi';
$config['ffmpeg_ext_files'][] = 'ts';
$config['ffmpeg_ext_files'][] = 'm2ts';
$config['ffmpeg_ext_files'][] = 'mov';
$config['ffmpeg_ext_files'][] = 'mkv';

# imagemagick, graphicsmagick extensions
$config['imgm_ext_files'][] = 'mpo';
$config['imgm_ext_files'][] = 'avif';
$config['imgm_ext_files'][] = 'tiff';
$config['imgm_ext_files'][] = 'webp';
$config['imgm_ext_files'][] = 'svg';

$config['allowed_ext_files'] = array_merge(
	$config['allowed_ext_files'], $config['imgm_ext_files'], $config['ffmpeg_ext_files']);

if (! function_exists('postHundlerIcThumb')) {

	class ImageIC {
		public $src, $format, $image, $size;
		public function __construct($src, $format = false, $size = false) {
			global $config;
		
			$this->src = $src;
			$this->format = $format;

			if ($config['thumb_method'] == 'imagick') {
				$classname = 'ImageImagick';
			} elseif (in_array($config['thumb_method'], array('convert', 'convert+gifsicle', 'gm', 'gm+gifsicle'))) {
				$classname = 'ImageConvert';
			} else {
				$classname = 'Image' . strtoupper($this->format);
				if (!class_exists($classname)) {
					error('IC-1:'._('Unsupported file format: ') . $this->format);
				}
			}
		
			$this->image = new $classname($this, $size);

			if (!$this->image->valid()) {
				$this->delete();
				error('IC-2:' . $config['error']['invalidimg']);
			}
		
			$this->size = (object)array('width' => $this->image->_width(), 'height' => $this->image->_height());
			if ($this->size->width < 1 || $this->size->height < 1) {
				$this->delete();
				error('IC-3:' . $config['error']['invalidimg']);
			}
		}
	
		public function resize($extension, $max_width, $max_height) {
			global $config;

			if ($config['thumb_method'] == 'imagick') {
				$classname = 'ImageImagick';
			} elseif ($config['thumb_method'] == 'convert') {
				$classname = 'ImageConvert';
			} elseif ($config['thumb_method'] == 'convert+gifsicle') {
				$classname = 'ImageConvert';
				$gifsicle = true;
			} elseif ($config['thumb_method'] == 'gm') {
				$classname = 'ImageConvert';
				$gm = true;
			} elseif ($config['thumb_method'] == 'gm+gifsicle') {
				$classname = 'ImageConvert';
				$gm = true;
				$gifsicle = true;
			} else {
				$classname = 'Image' . strtoupper($extension);
				if (!class_exists($classname)) {
					error('IC-4:'._('Unsupported file format: ') . $extension);
				}
			}
		
			$thumb = new $classname(false);
			$thumb->src = $this->src;
			$thumb->format = $this->format;
			$thumb->original_width = $this->size->width;
			$thumb->original_height = $this->size->height;
		
			$x_ratio = $max_width / $this->size->width;
			$y_ratio = $max_height / $this->size->height;
		
			if (($this->size->width <= $max_width) && ($this->size->height <= $max_height)) {
				$width = $this->size->width;
				$height = $this->size->height;
			} elseif (($x_ratio * $this->size->height) < $max_height) {
				$height = ceil($x_ratio * $this->size->height);
				$width = $max_width;
			} else {
				$width = ceil($y_ratio * $this->size->width);
				$height = $max_height;
			}
		
			$thumb->_resize($this->image->image, $width, $height);
				
			return $thumb;
		}
	
		public function to($dst) {
			$this->image->to($dst);
		}
	
		public function delete() {
			file_unlink($this->src);
		}
		public function destroy() {
			$this->image->_destroy();
		}
	}

	
	function postHundlerIcThumb($post) {
		global $board, $config;
		if (! $post->has_file) {
			return;
		};
		if ($config['spoiler_images'] && isset($_POST['spoiler'])) {
			return;
		};
		foreach ($post->files as &$file) {
			# exclude 'spoiler' and thumb-generated file.
			if ($file->thumb == 'file' || $file->thumb == '') {
				$result = postHandlerVideoThumb($file, $post);
				if ($result === true) {
					continue;
				} elseif ($result === false) {
					# do nothing
				} else {
					return 'postHandlerVideoThumb: ' . $result;  # error
				};
				$result = postHandlerImageThumb($file, $post);
				if ($result === true) {
					continue;
				} elseif ($result === false) {
					# do nothing
				} else {
					return 'postHandlerImageThumb:' . $result;  # error
				};
			};
		};
	};


	function postHandlerImageThumb(&$file, &$post) {
		global $board, $config;
		if (! in_array($file->extension, $config['imgm_ext_files'])) {
			# $post->body .= 'postHandlerImageThumb:fileext[' . $file->extension . '] ';
			return false;
		};
		if (! in_array($config['thumb_method'], ['gm', 'convert', 'imagick'])) {
			# $post->body .= 'postHandlerImageThumb:thumb_method[' . $config['thumb_method'] . '] ';
			return false;
		};
		require_once dirname(__FILE__) . '/image.php';

		$file_thumb = $board['dir'] . $config['dir']['thumb'] . $file->file_id . '.';
		if ($config['thumb_ext']) {
			$file_thumb .= $config['thumb_ext'];
		} else {
			$file_thumb .= $file->extension;
		};

		$image = new ImageIC($file->file_path);

		$thumb = $image->resize(
			$config['thumb_ext'] ? $config['thumb_ext'] : $file->extension,
			$post->op ? $config['thumb_op_width'] : $config['thumb_width'],
			$post->op ? $config['thumb_op_height'] : $config['thumb_height']
		);
		$thumb->to($file_thumb);
		$file_thumbwidth = $thumb->width;
		$file_thumbheight = $thumb->height;
		$thumb->_destroy();
		$file_thumb = mb_substr($file_thumb, mb_strlen($board['dir'] . $config['dir']['thumb']));

		$file->thumb = $file_thumb;
		$file->thumbwidth = $file_thumbwidth;
		$file->thumbheight = $file_thumbheight;
		return true;
	};


	function postHandlerVideoThumb(&$file, &$post) {
		# return string if error.
		global $board, $config;
		if (! $config['webm']['use_ffmpeg']) {
			return false;
		};
		if (! in_array($file->extension, $config['ffmpeg_ext_files'])) {
			return false;
		};
		# ref: vichan/inc/lib/webm/ffmpeg.php: get_webm_info,
		require_once dirname(__FILE__) . '/lib/webm/ffmpeg.php';

		$video_info = get_video_info($file->file_path);
		if (! empty($video_info['error'])) {
			return 'postHandlerVideoThumb:' . $video_info['error']['msg'];
		};
		$file->width = $video_info['width'];
		$file->height = $video_info['height'];
		$file = set_thumbnail_dimensions($post, $file);
		$tn_path = $board['dir'] . $config['dir']['thumb'] . $file->file_id . '.jpg';
		
		if(0 == make_webm_thumbnail($file->file_path, $tn_path, $file->thumbwidth, $file->thumbheight, $video_info['duration'])) {
			$file->thumb = $file->file_id . '.jpg';
			return true;
		};
		return false;
	};


	function get_video_info($filename) {
		global $board, $config;
		$filename = escapeshellarg($filename);
		$ffprobe = $config['webm']['ffprobe_path'];
		$ffprobe_out = array();
		$info = array();
		exec("$ffprobe -v quiet -print_format json -show_format -show_streams $filename", $ffprobe_out);
		$ffprobe_out = json_decode(implode("\n", $ffprobe_out), 1);
		$info['duration'] = $ffprobe_out['format']['duration'];
		foreach ($ffprobe_out['streams'] as $stream) {
			if ($stream['width'] != '' && $stream['height'] != '') {
				$info['width'] = $stream['width'];
				$info['height'] = $stream['height'];
				break;
			};
		};
		return $info;
	};
};

# mp4 と webm 以外の動画にもサムネイルを付ける(インラインプレイヤーとは別設定)
# この行で設定が有効になる。
event_handler('post', 'postHundlerIcThumb');