delete source page, start of youtube-dl wrapper

app/common/static/styles/_colours.scss

@@ -36,7 +36,7 @@ $form-error-text-colour: $colour-near-white;
 $form-help-text-colour: $colour-light-blue;
 $form-delete-button-background-colour: $colour-red;
 
-$collection-no-items-text-colour: $colour-light-blue;
+$collection-no-items-text-colour: $colour-near-black;
 $collection-background-hover-colour: $colour-orange;
 $collection-text-hover-colour: $colour-near-white;
 

app/sync/forms.py

@@ -1,5 +1,6 @@
 
 from django import forms
+from django.utils.translation import gettext_lazy as _
 
 
 class ValidateSourceForm(forms.Form):
@@ -10,6 +11,14 @@ class ValidateSourceForm(forms.Form):
         widget=forms.HiddenInput()
     )
     source_url = forms.URLField(
-        label='Source URL',
+        label=_('Source URL'),
         required=True
     )
+
+
+class ConfirmDeleteSourceForm(forms.Form):
+
+    delete_media = forms.BooleanField(
+        label=_('Also delete downloaded media'),
+        required=False
+    )

app/sync/models.py

@@ -66,7 +66,7 @@ class Source(models.Model):
     }
 
     URLS = {
-        SOURCE_TYPE_YOUTUBE_CHANNEL: 'https://www.youtube.com/{key}',
+        SOURCE_TYPE_YOUTUBE_CHANNEL: 'https://www.youtube.com/c/{key}',
         SOURCE_TYPE_YOUTUBE_PLAYLIST: 'https://www.youtube.com/playlist?list={key}',
     }
 
@@ -172,11 +172,15 @@ class Source(models.Model):
     @property
     def icon(self):
         return self.ICONS.get(self.source_type)
-    
+
+    @classmethod
+    def create_url(obj, source_type, key):
+        url = obj.URLS.get(source_type)
+        return url.format(key=key)
+
     @property
     def url(self):
-        url = self.URLS.get(self.source_type)
-        return url.format(key=self.key)
+        return Source.create_url(self.source_type, self.key)
     
     @property
     def directory_path(self):

app/sync/templates/sync/source-delete.html

@@ -0,0 +1,28 @@
+{% extends 'base.html' %}
+
+{% block headtitle %}Delete source - {{ source.name }}{% endblock %}
+
+{% block content %}
+<div class="row no-margin-bottom">
+  <div class="col s12">
+    <h1>Delete source <strong>{{ source.name }}</strong></h1>
+    <p>
+      Are you sure you want to delete this source? Deleting a source is permanent.
+      By default, deleting a source does not delete any saved media files. You can
+      tick the &quot;also delete downloaded media&quot; checkbox to also remove save
+      media when you delete the source. Deleting a source cannot be undone.
+    </p>
+  </div>
+</div>
+<div class="row">
+  <form method="post" action="{% url 'sync:delete-source' pk=source.pk %}" class="col s12 simpleform">
+    {% csrf_token %}
+    {% include 'simpleform.html' with form=form %}
+    <div class="row no-margin-bottom padding-top">
+      <div class="col s12">
+        <button class="btn" type="submit" name="action">Really delete source <i class="fas fa-trash-alt"></i></button>
+      </div>
+    </div>
+  </form>
+</div>
+{% endblock %}

app/sync/templates/sync/source.html

@@ -80,7 +80,7 @@
     <a href="{% url 'sync:update-source' pk=source.pk %}" class="btn">Edit source <i class="fas fa-pen-square"></i></a>
   </div>
   <div class="col s12 l6 margin-bottom">
-    <a href="" class="btn delete-button">Delete source <i class="fas fa-trash-alt"></i></a>
+    <a href="{% url 'sync:delete-source' pk=source.pk %}" class="btn delete-button">Delete source <i class="fas fa-trash-alt"></i></a>
   </div>
 </div>
 {% endblock %}

app/sync/urls.py

@@ -1,6 +1,7 @@
 from django.urls import path
 from .views import (DashboardView, SourcesView, ValidateSourceView, AddSourceView,
-                    SourceView, UpdateSourceView, MediaView, TasksView, LogsView)
+                    SourceView, UpdateSourceView, DeleteSourceView, MediaView,
+                    TasksView, LogsView)
 
 
 app_name = 'sync'
@@ -36,9 +37,13 @@ urlpatterns = [
          UpdateSourceView.as_view(),
          name='update-source'),
 
-    # Media URLs
+    path('source-delete/<uuid:pk>',
+         DeleteSourceView.as_view(),
+         name='delete-source'),
 
-    path('media',
+    # Media URLs (note /media/ is the static media URL, don't use that)
+
+    path('mediafiles',
          MediaView.as_view(),
          name='media'),
 

app/sync/views.py

@@ -1,15 +1,17 @@
 from django.conf import settings
 from django.http import Http404
 from django.views.generic import TemplateView, ListView, DetailView
-from django.views.generic.edit import FormView, CreateView, UpdateView
+from django.views.generic.edit import (FormView, FormMixin, CreateView, UpdateView,
+                                       DeleteView)
 from django.urls import reverse_lazy
 from django.forms import ValidationError
 from django.utils.text import slugify
 from django.utils.translation import gettext_lazy as _
 from common.utils import append_uri_params
 from .models import Source
-from .forms import ValidateSourceForm
+from .forms import ValidateSourceForm, ConfirmDeleteSourceForm
 from .utils import validate_url
+from . import youtube
 
 
 class DashboardView(TemplateView):
@@ -155,7 +157,7 @@ class ValidateSourceView(FormView):
                 ValidationError(self.errors['invalid_source'])
             )
         source_url = form.cleaned_data['source_url']
-        validation_url = self.validation_urls.get(self.source_type)
+        validation_url = self.validation_urls.get(source_type)
         try:
             self.key = validate_url(source_url, validation_url)
         except ValidationError as e:
@@ -246,6 +248,30 @@ class UpdateSourceView(UpdateView):
         return append_uri_params(url, {'message': 'source-updated'})
 
 
+class DeleteSourceView(DeleteView, FormMixin):
+    '''
+        Confirm the deletion of a source with an option to delete all the media
+        associated with the source from disk when the source is deleted.
+    '''
+
+    template_name = 'sync/source-delete.html'
+    model = Source
+    form_class = ConfirmDeleteSourceForm
+    context_object_name = 'source'
+
+    def post(self, request, *args, **kwargs):
+        delete_media_val = request.POST.get('delete_media', False)
+        delete_media = True if delete_media_val is not False else False
+        if delete_media:
+            # TODO: delete media files from disk linked to this source
+            pass
+        return super().post(request, *args, **kwargs)
+
+    def get_success_url(self):
+        url = reverse_lazy('sync:sources')
+        return append_uri_params(url, {'message': 'source-deleted'})
+
+
 class MediaView(TemplateView):
     '''
         A bare list of media added with their states.

app/sync/youtube.py

@@ -0,0 +1,41 @@
+'''
+    Wrapper for the youtube-dl library. Used so if there are any library interface
+    updates we only need to udpate them in one place.
+'''
+
+
+from django.conf import settings
+import youtube_dl
+
+
+_defaults = getattr(settings, 'YOUTUBE_DEFAULTS', {})
+
+
+class YouTubeError(youtube_dl.utils.DownloadError):
+    '''
+        Generic wrapped error for all errors that could be raised by youtube-dl.
+    '''
+
+    pass
+
+
+def extract_info(url):
+    '''
+        Extracts information from a YouTube URL and returns it as a dict. For a channel
+        or playlist this returns a dict of all the videos on the channel or playlist
+        as well as associated metadata.
+    '''
+    opts = _defaults.update({
+        'skip_download': True,
+        'forcejson': True,
+        'simulate': True,
+        'extract_flat': 'in_playlist',
+        'playlist_items': 1,
+    })
+    response = {}
+    with youtube_dl.YoutubeDL(opts) as y:
+        try:
+            response = y.extract_info(url, download=False)
+        except youtube_dl.utils.DownloadError as e:
+            raise YouTubeError(f'Failed to extract_info for "{url}": {e}') from e
+    return response

app/tubesync/settings.py

@@ -119,6 +119,11 @@ DJANGO_SIMPLE_TASK_WORKERS = 2
 SOURCES_PER_PAGE = 25
 
 
+YOUTUBE_DEFAULTS = {
+    'age_limit': 99,
+}
+
+
 try:
     from .local_settings import *
 except ImportError as e: