add human-readable duration in feed

composer.json

@@ -12,6 +12,7 @@
         "doctrine/doctrine-bundle": "^2.9",
         "doctrine/doctrine-migrations-bundle": "^3.2",
         "doctrine/orm": "^2.15",
+        "php-ffmpeg/php-ffmpeg": "^1.2",
         "phpdocumentor/reflection-docblock": "^5.3",
         "phpstan/phpdoc-parser": "^1.20",
         "sensio/framework-extra-bundle": "^6.1",

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "c241853e026884d05d25f49b85867c16",
+    "content-hash": "8adb110d727d28dd8b1233bbe99e92de",
     "packages": [
         {
             "name": "doctrine/annotations",
@@ -1463,6 +1463,53 @@
             ],
             "time": "2023-01-14T14:17:03+00:00"
         },
+        {
+            "name": "evenement/evenement",
+            "version": "v3.0.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/igorw/evenement.git",
+                "reference": "0a16b0d71ab13284339abb99d9d2bd813640efbc"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/igorw/evenement/zipball/0a16b0d71ab13284339abb99d9d2bd813640efbc",
+                "reference": "0a16b0d71ab13284339abb99d9d2bd813640efbc",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^9 || ^6"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Evenement\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Igor Wiedler",
+                    "email": "igor@wiedler.ch"
+                }
+            ],
+            "description": "Événement is a very simple event dispatching library for PHP",
+            "keywords": [
+                "event-dispatcher",
+                "event-emitter"
+            ],
+            "support": {
+                "issues": "https://github.com/igorw/evenement/issues",
+                "source": "https://github.com/igorw/evenement/tree/v3.0.2"
+            },
+            "time": "2023-08-08T05:53:35+00:00"
+        },
         {
             "name": "monolog/monolog",
             "version": "3.4.0",
@@ -1564,6 +1611,95 @@
             ],
             "time": "2023-06-21T08:46:11+00:00"
         },
+        {
+            "name": "php-ffmpeg/php-ffmpeg",
+            "version": "v1.2.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/PHP-FFMpeg/PHP-FFMpeg.git",
+                "reference": "785a5ba05dd88b3b8146f85f18476b259b23917c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/PHP-FFMpeg/PHP-FFMpeg/zipball/785a5ba05dd88b3b8146f85f18476b259b23917c",
+                "reference": "785a5ba05dd88b3b8146f85f18476b259b23917c",
+                "shasum": ""
+            },
+            "require": {
+                "evenement/evenement": "^3.0",
+                "php": "^8.0 || ^8.1 || ^8.2 || ^8.3",
+                "psr/log": "^1.0 || ^2.0 || ^3.0",
+                "spatie/temporary-directory": "^2.0",
+                "symfony/cache": "^5.4 || ^6.0 || ^7.0",
+                "symfony/process": "^5.4 || ^6.0 || ^7.0"
+            },
+            "require-dev": {
+                "mockery/mockery": "^1.5",
+                "phpunit/phpunit": "^9.5.10"
+            },
+            "suggest": {
+                "php-ffmpeg/extras": "A compilation of common audio & video drivers for PHP-FFMpeg"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "FFMpeg\\": "src/FFMpeg",
+                    "Alchemy\\BinaryDriver\\": "src/Alchemy/BinaryDriver"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Romain Neutron",
+                    "email": "imprec@gmail.com",
+                    "homepage": "http://www.lickmychip.com/"
+                },
+                {
+                    "name": "Phraseanet Team",
+                    "email": "info@alchemy.fr",
+                    "homepage": "http://www.phraseanet.com/"
+                },
+                {
+                    "name": "Patrik Karisch",
+                    "email": "patrik@karisch.guru",
+                    "homepage": "http://www.karisch.guru"
+                },
+                {
+                    "name": "Romain Biard",
+                    "email": "romain.biard@gmail.com",
+                    "homepage": "https://www.strime.io/"
+                },
+                {
+                    "name": "Jens Hausdorf",
+                    "email": "hello@jens-hausdorf.de",
+                    "homepage": "https://jens-hausdorf.de"
+                },
+                {
+                    "name": "Pascal Baljet",
+                    "email": "pascal@protone.media",
+                    "homepage": "https://protone.media"
+                }
+            ],
+            "description": "FFMpeg PHP, an Object Oriented library to communicate with AVconv / ffmpeg",
+            "keywords": [
+                "audio",
+                "audio processing",
+                "avconv",
+                "avprobe",
+                "ffmpeg",
+                "ffprobe",
+                "video",
+                "video processing"
+            ],
+            "support": {
+                "issues": "https://github.com/PHP-FFMpeg/PHP-FFMpeg/issues",
+                "source": "https://github.com/PHP-FFMpeg/PHP-FFMpeg/tree/v1.2.0"
+            },
+            "time": "2024-01-02T10:37:01+00:00"
+        },
         {
             "name": "phpdocumentor/reflection-common",
             "version": "2.2.0",
@@ -2115,6 +2251,67 @@
             "abandoned": "Symfony",
             "time": "2023-02-24T14:57:12+00:00"
         },
+        {
+            "name": "spatie/temporary-directory",
+            "version": "2.2.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/spatie/temporary-directory.git",
+                "reference": "76949fa18f8e1a7f663fd2eaa1d00e0bcea0752a"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/spatie/temporary-directory/zipball/76949fa18f8e1a7f663fd2eaa1d00e0bcea0752a",
+                "reference": "76949fa18f8e1a7f663fd2eaa1d00e0bcea0752a",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^8.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^9.5"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Spatie\\TemporaryDirectory\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Alex Vanderbist",
+                    "email": "alex@spatie.be",
+                    "homepage": "https://spatie.be",
+                    "role": "Developer"
+                }
+            ],
+            "description": "Easily create, use and destroy temporary directories",
+            "homepage": "https://github.com/spatie/temporary-directory",
+            "keywords": [
+                "php",
+                "spatie",
+                "temporary-directory"
+            ],
+            "support": {
+                "issues": "https://github.com/spatie/temporary-directory/issues",
+                "source": "https://github.com/spatie/temporary-directory/tree/2.2.1"
+            },
+            "funding": [
+                {
+                    "url": "https://spatie.be/open-source/support-us",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/spatie",
+                    "type": "github"
+                }
+            ],
+            "time": "2023-12-25T11:46:58+00:00"
+        },
         {
             "name": "symfony/asset",
             "version": "v6.2.7",

src/Service/FeedService.php

@@ -8,6 +8,7 @@ use DOMDocument;
 use DOMElement;
 use DOMText;
 use Doctrine\ORM\EntityManagerInterface;
+use FFMpeg\FFProbe;
 use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
 use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
 
@@ -31,14 +32,20 @@ class FeedService
         $this->baseImageUrl = $rootUrl . Constants::IMAGES_BASE_PATH;
     }
 
-    public const DOCUMENT_VERSION = '2.0';
+    public const XML_NS = 'http://www.w3.org/2000/xmlns/';
+    public const ATOM_NS = 'http://www.w3.org/2005/Atom';
+    public const ITUNES_NS = 'http://www.itunes.com/dtds/podcast-1.0.dtd';
 
     public function generate(Podcast $podcast): string|false
     {
-        $document = new DOMDocument();
+        $document = new DOMDocument(version: '1.0', encoding: 'UTF-8');
-        $rssElement = new DOMElement('rss');
+
+        $rssElement = $document->createElement('rss');
+        $rssElement->setAttribute('version', '2.0');
+        $rssElement->setAttributeNS(self::XML_NS, 'xmlns:atom', self::ATOM_NS);
+        $rssElement->setAttributeNS(self::XML_NS, 'xmlns:itunes', self::ITUNES_NS);
         $document->appendChild($rssElement);
-        $rssElement->setAttribute('version', $this::DOCUMENT_VERSION);
+
         $channelElement = new DOMElement('channel');
         $rssElement->appendChild($channelElement);
         $titleElement = new DOMElement('title');
@@ -70,15 +77,24 @@ class FeedService
             $itemElement->appendChild(new DOMElement('description', $episode->getDescription()));
             $itemElement->appendChild(new DOMElement('link', $audioUrl));
             $itemElement->appendChild(new DOMElement('guid', $audioUrl));
-            $enclosureElement = new DOMElement('enclosure');
+
-            $itemElement->appendChild($enclosureElement);
-            $enclosureElement->setAttribute('url', $audioUrl);
             $filepath = 
-                $this->parameterBag->get('kernel.project_dir')
+                ($this->parameterBag->get('kernel.project_dir') ?: '')
                 . '/'
                 . Constants::BASE_PUBLIC_DIR
                 . Constants::FILES_BASE_PATH
                 . $episode->getAudioFilename();
+
+            // Use FFProbe to get the media duration, probably the easiest way but requires a working FFMpeg install.
+            $duration = floatval(FFProbe::create()->format($filepath)->get('duration'));
+            $duration_minutes = intval($duration / 60);
+            $duration_seconds = str_pad(strval(intval($duration % 60)), 2, '0', STR_PAD_LEFT);
+            $duration_str = "{$duration_minutes}:{$duration_seconds}";
+            $itemElement->appendChild(new DOMElement('itunes:duration', $duration_str, self::ITUNES_NS));
+
+            $enclosureElement = new DOMElement('enclosure');
+            $itemElement->appendChild($enclosureElement);
+            $enclosureElement->setAttribute('url', $audioUrl);
             $enclosureElement->setAttribute('type', mime_content_type($filepath));
             $enclosureElement->setAttribute('length', (string) filesize($filepath));
         }