feat: introduce template engine (#2899)

actions/DetectAction.php

@@ -47,7 +47,7 @@ class DetectAction implements ActionInterface
             $bridgeParams['format'] = $format;
 
             header('Location: ?action=display&' . http_build_query($bridgeParams), true, 301);
-            die();
+            exit;
         }
 
         returnClientError('No bridge found for given URL: ' . $targetURL);

actions/DisplayAction.php

@@ -63,7 +63,7 @@ class DisplayAction implements ActionInterface
                 unset($this->userData['_cache_timeout']);
                 $uri = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH) . '?' . http_build_query($this->userData);
                 header('Location: ' . $uri, true, 301);
-                die();
+                exit;
             }
 
             $cache_timeout = filter_var($this->userData['_cache_timeout'], FILTER_VALIDATE_INT);
@@ -126,7 +126,7 @@ class DisplayAction implements ActionInterface
 
                 if ($mtime <= $stime) { // Cached data is older or same
                     header('Last-Modified: ' . gmdate('D, d M Y H:i:s ', $mtime) . 'GMT', true, 304);
-                    die();
+                    exit;
                 }
             }
 
@@ -193,7 +193,9 @@ class DisplayAction implements ActionInterface
                         $items[] = $item;
                     } elseif (Configuration::getConfig('error', 'output') === 'http') {
                         header('Content-Type: text/html', true, $this->getReturnCode($e));
-                        die(buildTransformException($e, $bridge));
+                        $response = buildTransformException($e, $bridge);
+                        print $response;
+                        exit;
                     }
                 }
             }
@@ -224,7 +226,9 @@ class DisplayAction implements ActionInterface
         } catch (\Throwable $e) {
             error_log($e);
             header('Content-Type: text/html', true, $e->getCode());
-            die(buildTransformException($e, $bridge));
+            $response = buildTransformException($e, $bridge);
+            print $response;
+            exit;
         }
     }
 }

caches/SQLiteCache.php

@@ -13,7 +13,8 @@ class SQLiteCache implements CacheInterface
     public function __construct()
     {
         if (!extension_loaded('sqlite3')) {
-            die('"sqlite3" extension not loaded. Please check "php.ini"');
+            print render('error.html.php', ['message' => '"sqlite3" extension not loaded. Please check "php.ini"']);
+            exit;
         }
 
         if (!is_writable(PATH_CACHE)) {
@@ -25,12 +26,16 @@ class SQLiteCache implements CacheInterface
 
         $file = Configuration::getConfig(get_called_class(), 'file');
         if (empty($file)) {
-            die('Configuration for ' . get_called_class() . ' missing. Please check your ' . FILE_CONFIG);
+            $message = sprintf('Configuration for %s missing. Please check your %s', get_called_class(), FILE_CONFIG);
+            print render('error.html.php', ['message' => $message]);
+            exit;
         }
         if (dirname($file) == '.') {
             $file = PATH_CACHE . $file;
         } elseif (!is_dir(dirname($file))) {
-            die('Invalid configuration for ' . get_called_class() . '. Please check your ' . FILE_CONFIG);
+            $message = sprintf('Invalid configuration for %s. Please check your %s', get_called_class(), FILE_CONFIG);
+            print render('error.html.php', ['message' => $message]);
+            exit;
         }
 
         if (!is_file($file)) {

index.php

@@ -26,13 +26,7 @@ try {
     }
 } catch (\Throwable $e) {
     error_log($e);
-
-    $code = $e->getCode();
-    if ($code !== -1) {
-        header('Content-Type: text/plain', true, $code);
-    }
-
-    $message = sprintf("Uncaught Exception %s: '%s'\n", get_class($e), $e->getMessage());
-
-    print $message;
+    print render('error.html.php', [
+        'message' => sprintf("Uncaught Exception %s: '%s'\n", get_class($e), $e->getMessage()),
+    ]);
 }

lib/Authentication.php

@@ -58,7 +58,9 @@ class Authentication
         if (Configuration::getConfig('authentication', 'enable') === true) {
             if (!Authentication::verifyPrompt()) {
                 header('WWW-Authenticate: Basic realm="RSS-Bridge"', true, 401);
-                die('Please authenticate in order to access this instance !');
+                $message = 'Please authenticate in order to access this instance !';
+                print $message;
+                exit;
             }
         }
     }

lib/Configuration.php

@@ -317,7 +317,10 @@ final class Configuration
      */
     private static function reportError($message)
     {
-        header('Content-Type: text/plain', true, 500);
-        die('Configuration error' . PHP_EOL . $message);
+        http_response_code(500);
+        print render('error.html.php', [
+            'message' => "Configuration error: $message",
+        ]);
+        exit;
     }
 }

lib/html.php

@@ -12,6 +12,44 @@
  * @link    https://github.com/rss-bridge/rss-bridge
  */
 
+function render(string $template, array $context = []): string
+{
+    $context['page'] = render_template($template, $context);
+    return render_template('base.html.php', $context);
+}
+
+function render_template(string $template, array $context = []): string
+{
+    if (isset($context['template'])) {
+        throw new \Exception("Don't use `template` as a context key");
+    }
+    extract($context);
+    ob_start();
+    try {
+        require __DIR__ . '/../templates/' . $template;
+    } catch (\Throwable $e) {
+        ob_end_clean();
+        throw $e;
+    }
+    return ob_get_clean();
+}
+
+/**
+ * Escape for html context
+ */
+function e(string $s): string
+{
+    return htmlspecialchars($s, ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');
+}
+
+/**
+ * Explicitly don't escape
+ */
+function raw(string $s): string
+{
+    return $s;
+}
+
 /**
  * Removes unwanted tags from a given HTML text.
  *

templates/base.html.php

@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <meta name="description" content="RSS-Bridge" />
+    <title><?= e($title ?? 'RSS-Bridge') ?></title>
+    <link href="static/style.css" rel="stylesheet">
+    <link rel="icon" type="image/png" href="static/favicon.png">
+</head>
+<body>
+    <header>
+        <div class="logo"></div>
+    </header>
+
+    <?= raw($page) ?>
+</html>

templates/error.html.php

@@ -0,0 +1,9 @@
+<section>
+    <h2>Something went wrong</h2>
+    <br>
+
+    <p>
+        <?= e($message) ?>
+    </p>
+
+</section>