Initial import

app/controllers/CoverController.php

@@ -0,0 +1,66 @@
+<?php
+
+class CoverController {
+
+	static function get_cover($_request, $id, $filename, $size = false) {
+
+		$rev = new Revision($id);
+		if ($rev === false) return "";
+
+		$path = $rev->path();
+
+		$pdf = new PDF($path . "/doc.pdf");
+		if (!$pdf->exists()) {
+			return [404, "Not Found"];
+		}
+
+		if (!$size) {
+			$imgpath = sprintf("%s/cover.jpg", $path);
+		} else {
+			$imgpath = sprintf("%s/cover-%d.jpg", $path, $size);
+		}
+
+		$file = new File($imgpath);
+
+		if ($file->exists()) {
+			$h = $file->hash();
+			$h = "\"$h\"";
+			if ($h == $_request->header("If-None-Match")) {
+				return [304, "Not Modified", [
+					"ETag" => $h,
+					"Cache-Control" => "public, max-age=86400, must-revalidate",
+				]];
+			}
+			return new Image($file);
+		}
+
+		$cover = new Image($path . "/cover.jpg");
+		if (!$cover->exists()) {
+			$pdf->extract_page(0, $cover->path());
+			$cover = new Image($path . "/cover.jpg");
+		}
+
+		if (!$cover->exists()) {
+			return [404, "Not Found"];
+		}
+
+		if ($size === false) $size = $cover->width();
+
+		if ($size >= $cover->width()) {
+			$h = $cover->hash();
+			$h = "\"$h\"";
+			if ($h == $_request->header("If-None-Match")) {
+				return [304, "Not Modified", [
+					"ETag" => $h,
+					"Cache-Control" => "public, max-age=86400, must-revalidate",
+				]];
+			}
+			return $cover;
+		}
+
+		$cover->scale($size);
+		$img = $cover->save($imgpath, "image/jpeg");
+		return $img;
+	}
+	
+}