save output as webp

update README

2 files changed, 48 insertions, 11 deletions

diff --git a/README.md b/README.md
index 33d58b2..8359a75 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,24 @@
-git clone to ``plugins.local/af_zz_api_resize``.
+## Resizes images as requested by API clients
+
+Downsamples images if an API client requests the backend to do so. Useful for
+slow or unreliable network connections, i.e. mobile internet.
+
+This plugin handles two additional parameters passed to ``getHeadlines`` or ``getArticle`` 
+API call:
+
+* ``resize_enabled`` (bool) - enable or disable resizing
+* ``resize_width`` (int) - target width (or height, plugin resizes based on a larger dimension)
+
+Images are saved in a WEBP format.
+
+## Installation
+
+Plugin assumes your tt-rss image cache (``cache/images``) is writable 
+and GD library is available to PHP.
+
+1. git clone to ``plugins.local/af_zz_api_resize``.
+2. Enable "downsample images" option in the API client (for example, tt-rss-android)
+
+## License
+
+GPLv3
diff --git a/init.php b/init.php
index af7b77c..bfe310e 100644
--- a/init.php
+++ b/init.php
@@ -89,10 +89,12 @@ class Af_Zz_Api_Resize extends Plugin {
 				}
 			}
 
-			if ($need_stamp || !$need_alpha)
+			/*if ($need_stamp || !$need_alpha)
 				@imageJpeg($t_im, $output_filename, 75);
 			else
-				@imagePng($t_im, $output_filename, 5);
+				@imagePng($t_im, $output_filename, 5);*/
+
+			imagewebp($t_im, $output_filename, 80);
 
 			imageDestroy($o_im);
 			imageDestroy($t_im);
@@ -204,6 +206,10 @@ class Af_Zz_Api_Resize extends Plugin {
 	function hook_render_article_api($params) {
 		$need_saving = false;
 		$width = (int) clean($_REQUEST["resize_width"]);
+		$enabled = sql_bool_to_bool(clean($_REQUEST["resize_enabled"]));
+
+		if (!$enabled || !$width)
+			return $params["headline"];
 
 		$doc = new DOMDocument();
 		if (@$doc->loadHTML('<?xml encoding="UTF-8">' . $params["headline"]["content"])) {
@@ -221,19 +227,27 @@ class Af_Zz_Api_Resize extends Plugin {
 				}
 			}
 
-			$vids = $xpath->query("(//picture)");
+			$vids = $xpath->query("//video[@poster]");
 
 			foreach ($vids as $vid) {
-				$vsrcs = $xpath->query("source", $vid);
+				$new_poster = $this->rewrite_url_if_needed($vid->getAttribute("poster"), $width);
+
+				if ($new_poster != $vid->getAttribute("src")) {
+					$vid->setAttribute("poster", $new_poster);
+
+					$need_saving = true;
+				}
+			}
 
-				foreach ($vsrcs as $vsrc) {
-					$new_src = $this->rewrite_url_if_needed($vsrc->getAttribute("src"), $width);
+			$psrcs = $xpath->query("//picture/source");
 
-					if ($new_src != $vsrc->getAttribute("src")) {
-						$vid->setAttribute("src", $new_src);
+			foreach ($psrcs as $src) {
+				$new_src = $this->rewrite_url_if_needed($src->getAttribute("src"), $width);
 
-						$need_saving = true;
-					}
+				if ($new_src != $src->getAttribute("src")) {
+					$src->setAttribute("src", $new_src);
+
+					$need_saving = true;
 				}
 			}
 		}