From b83f60b7f7f2863c1a8be5593e264583f76e8bb0 Mon Sep 17 00:00:00 2001
From: Raffael Mancini <raffael.mancini@mnhn.lu>
Date: Sat, 30 Nov 2024 16:01:18 +0100
Subject: [PATCH] feat: Implemented HLS stream source as new plugin type.

Also implemented show_controls and autoplay attributes on the
video element. These are particularly useful when showing a
live stream.
---
 djangocms_video/cms_plugins.py                | 31 ++++++++-
 .../migrations/0012_hlsstreamsource.py        | 23 +++++++
 ...ayer_autoplay_videoplayer_show_controls.py | 23 +++++++
 djangocms_video/models.py                     | 27 ++++++++
 .../default/hls_stream_source.html            | 64 +++++++++++++++++++
 .../djangocms_video/default/video_player.html |  6 +-
 6 files changed, 171 insertions(+), 3 deletions(-)
 create mode 100644 djangocms_video/migrations/0012_hlsstreamsource.py
 create mode 100644 djangocms_video/migrations/0013_videoplayer_autoplay_videoplayer_show_controls.py
 create mode 100644 djangocms_video/templates/djangocms_video/default/hls_stream_source.html

diff --git a/djangocms_video/cms_plugins.py b/djangocms_video/cms_plugins.py
index ecc9b2d..300e5a9 100644
--- a/djangocms_video/cms_plugins.py
+++ b/djangocms_video/cms_plugins.py
@@ -10,7 +10,7 @@ class VideoPlayerPlugin(CMSPluginBase):
     name = _('Video player')
     text_enabled = True
     allow_children = True
-    child_classes = ['VideoSourcePlugin', 'VideoTrackPlugin']
+    child_classes = ['VideoSourcePlugin', 'VideoTrackPlugin', 'HlsStreamSourcePlugin']
     form = forms.VideoPlayerPluginForm
 
     fieldsets = [
@@ -32,6 +32,8 @@ class VideoPlayerPlugin(CMSPluginBase):
             'fields': (
                 'poster',
                 'attributes',
+                'show_controls',
+                'autoplay',
             )
         })
     ]
@@ -39,6 +41,8 @@ class VideoPlayerPlugin(CMSPluginBase):
     def render(self, context, instance, placeholder):
         context = super().render(context, instance, placeholder)
         context['video_template'] = instance.template
+        context['show_controls'] = instance.show_controls
+        context['autoplay'] = instance.autoplay
         return context
 
     def get_render_template(self, context, instance, placeholder):
@@ -72,6 +76,30 @@ def get_render_template(self, context, instance, placeholder):
         return 'djangocms_video/{}/source.html'.format(context.get('video_template', 'default'))
 
 
+class HlsStreamSourcePlugin(CMSPluginBase):
+    model = models.HlsStreamSource
+    name = _('HLS Stream Source')
+    module = _('Video player')
+    require_parent = True
+    parent_classes = ['VideoPlayerPlugin']
+
+    fieldsets = [
+        (None, {
+            'fields': (
+                'hls_source_url',
+            )
+        }),
+    ]
+
+    def render(self, context, instance, placeholder):
+        context = super().render(context, instance, placeholder)
+        context['source_id'] = instance.id
+        return context
+
+    def get_render_template(self, context, instance, placeholder):
+        return 'djangocms_video/{}/hls_stream_source.html'.format(context.get('video_template', 'default'))
+
+
 class VideoTrackPlugin(CMSPluginBase):
     model = models.VideoTrack
     name = _('Track')
@@ -101,5 +129,6 @@ def get_render_template(self, context, instance, placeholder):
 
 
 plugin_pool.register_plugin(VideoPlayerPlugin)
+plugin_pool.register_plugin(HlsStreamSourcePlugin)
 plugin_pool.register_plugin(VideoSourcePlugin)
 plugin_pool.register_plugin(VideoTrackPlugin)
diff --git a/djangocms_video/migrations/0012_hlsstreamsource.py b/djangocms_video/migrations/0012_hlsstreamsource.py
new file mode 100644
index 0000000..80b579f
--- /dev/null
+++ b/djangocms_video/migrations/0012_hlsstreamsource.py
@@ -0,0 +1,23 @@
+# Generated by Django 5.0.9 on 2024-11-30 13:11
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('cms', '0035_auto_20230822_2208_squashed_0036_auto_20240311_1028'),
+        ('djangocms_video', '0011_alter_videoplayer_cmsplugin_ptr_and_more'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='HlsStreamSource',
+            fields=[
+                ('cmsplugin_ptr', models.OneToOneField(auto_created=True, on_delete=django.db.models.deletion.CASCADE, parent_link=True, primary_key=True, related_name='%(app_label)s_%(class)s', serialize=False, to='cms.cmsplugin')),
+                ('hls_source_url', models.CharField(max_length=1024, verbose_name='HLS Source URL')),
+            ],
+            bases=('cms.cmsplugin',),
+        ),
+    ]
diff --git a/djangocms_video/migrations/0013_videoplayer_autoplay_videoplayer_show_controls.py b/djangocms_video/migrations/0013_videoplayer_autoplay_videoplayer_show_controls.py
new file mode 100644
index 0000000..d91e216
--- /dev/null
+++ b/djangocms_video/migrations/0013_videoplayer_autoplay_videoplayer_show_controls.py
@@ -0,0 +1,23 @@
+# Generated by Django 5.0.9 on 2024-11-30 14:56
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('djangocms_video', '0012_hlsstreamsource'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='videoplayer',
+            name='autoplay',
+            field=models.BooleanField(default=False, help_text='If enabled, the video will automatically play once the page is loaded. This might not work depending on how the user has configured their browser.', verbose_name='Autoplay'),
+        ),
+        migrations.AddField(
+            model_name='videoplayer',
+            name='show_controls',
+            field=models.BooleanField(default=True, help_text='If enabled, the video will be shown with Play, Pause and Seek elements that allow the user to control playback.', verbose_name='Show controls'),
+        ),
+    ]
diff --git a/djangocms_video/models.py b/djangocms_video/models.py
index 323f0ba..63f4dd1 100644
--- a/djangocms_video/models.py
+++ b/djangocms_video/models.py
@@ -80,6 +80,23 @@ class VideoPlayer(CMSPlugin):
         verbose_name=_('Attributes'),
         blank=True,
     )
+    show_controls = models.BooleanField(
+        verbose_name=_('Show controls'),
+        default=True,
+        help_text=_(
+            'If enabled, the video will be shown with Play, Pause and Seek '
+            'elements that allow the user to control playback.'
+        ),
+    )
+    autoplay = models.BooleanField(
+        verbose_name=_('Autoplay'),
+        default=False,
+        help_text=_(
+            'If enabled, the video will automatically play once the page is '
+            'loaded. This might not work depending on how the user has '
+            'configured their browser.'
+        ),
+    )
 
     # Add an app namespace to related_name to avoid field name clashes
     # with any other plugins that have a field with the same name as the
@@ -164,6 +181,16 @@ def copy_relations(self, oldinstance):
         self.source_file = oldinstance.source_file
 
 
+class HlsStreamSource(CMSPlugin):
+    """
+    Renders the HTML <source> element inside of <video> for an HLS stream defined by a .m3u8 URL.
+    """
+    hls_source_url = models.CharField(
+        verbose_name=_('HLS Source URL'),
+        max_length=1024,
+    )
+
+
 class VideoTrack(CMSPlugin):
     """
     Renders the HTML <track> element inside <video>.
diff --git a/djangocms_video/templates/djangocms_video/default/hls_stream_source.html b/djangocms_video/templates/djangocms_video/default/hls_stream_source.html
new file mode 100644
index 0000000..5421917
--- /dev/null
+++ b/djangocms_video/templates/djangocms_video/default/hls_stream_source.html
@@ -0,0 +1,64 @@
+{% load i18n cms_tags sekizai_tags %}
+
+{% if not disabled %}
+    {% with instance.hls_source_url as url %}
+        <source id="{{ source_id }}" src="{{ url }}" type="application/x-mpegURL" {{ instance.attributes_str }}>
+    {% endwith %}
+{% endif %}
+
+{% addtoblock "js" %}
+<script src="https://cdn.jsdelivr.net/npm/hls.js@1.5.17/dist/hls.min.js "></script>
+<script>
+// Find first source ending in a .m3u8 path and return its url
+function getHlsUrl(videoElement) {
+  const sources = videoElement.querySelectorAll("source");
+  for (source of sources) {
+    if (source.src.endsWith("m3u8")) {
+      return source.src;
+    }
+  }
+  return null;
+}
+
+function attachHlsStream(sourceElement) {
+  if (Hls.isSupported()) {
+    let video = sourceElement.parentElement;
+    let hls = new Hls();
+    let hlsUrl = getHlsUrl(video);
+    hls.loadSource(hlsUrl);
+    hls.attachMedia(video);
+    hls.on(Hls.Events.MANIFEST_PARSED, function (event, data) {
+      console.log('manifest loaded, found ' + data.levels.length + ' quality level',);
+      video.play();
+    });
+  
+    hls.on(Hls.Events.ERROR, function (event, data) {
+      if (data.fatal) {
+        switch (data.type) {
+        case Hls.ErrorTypes.MEDIA_ERROR:
+          console.error('fatal media error encountered, try to recover');
+          hls.recoverMediaError();
+          break;
+        case Hls.ErrorTypes.NETWORK_ERROR:
+          console.error('fatal network error encountered', data);
+          break;
+        default:
+          hls.destroy();
+          break;
+        }
+      }
+    });
+  } else if (video.canPlayType('application/vnd.apple.mpegurl')) {
+    video.src = hlsUrl;
+    video.addEventListener('loadedmetadata', () => {
+      video.play();
+    });
+  } else {
+    console.error('HLS is not supported on this browser.');
+  }
+}
+
+attachHlsStream(document.getElementById('{{ source_id }}'));
+
+</script>
+{% endaddtoblock %}	
diff --git a/djangocms_video/templates/djangocms_video/default/video_player.html b/djangocms_video/templates/djangocms_video/default/video_player.html
index 6a88bc0..16310c0 100644
--- a/djangocms_video/templates/djangocms_video/default/video_player.html
+++ b/djangocms_video/templates/djangocms_video/default/video_player.html
@@ -12,8 +12,10 @@
         {% endwith %}
     {% else %}
         {# render <source> or <track> plugins #}
-        <video controls {{ instance.attributes_str }}
-            {% if instance.poster %} poster="{{ instance.poster.url }}"{% endif %}>
+        <video {% if show_controls %} controls {% endif %}
+               {% if autoplay %} autoplay {% endif %}
+               {{ instance.attributes_str }}
+               {% if instance.poster %} poster="{{ instance.poster.url }}"{% endif %}>
             {% for plugin in instance.child_plugin_instances %}
                 {% render_plugin plugin %}
             {% endfor %}