Feature #403 - Ability to delete media entries - Fixes according to feedback

*   Moved `mediagoblin.confirm` stuff to `mediagoblin.user_pages`,
    templates too.
*   Removed route extension for `mediagoblin.confirm`
*   Created `delete_media_files` which deletes all media files
    on the public_store when the entry is deleted
*   Created a new decorator to check if a user has the permission
     to delete an entry.

mediagoblin/user_pages/forms.py

@@ -23,3 +23,10 @@ class MediaCommentForm(wtforms.Form):
     comment_content = wtforms.TextAreaField(
         _('Comment'),
         [wtforms.validators.Required()])
+
+
+class ConfirmDeleteForm(wtforms.Form):
+    confirm = wtforms.RadioField('Confirm',
+                                 default='False',
+                                 choices=[('False', 'No, I made a mistake!'),
+                                          ('True', 'Yes, delete it!')])

mediagoblin/user_pages/routing.py

@@ -32,9 +32,9 @@ user_routes = [
     Route('mediagoblin.edit.attachments',
           '/{user}/m/{media}/attachments/',
           controller="mediagoblin.edit.views:edit_attachments"),
-    Route('mediagoblin.confirm.confirm_delete',
+    Route('mediagoblin.user_pages.media_confirm_delete',
           "/{user}/m/{media}/confirm-delete/",
-          controller="mediagoblin.confirm.views:confirm_delete"),
+          controller="mediagoblin.user_pages.views:media_confirm_delete"),
     Route('mediagoblin.user_pages.atom_feed', '/{user}/atom/',
         controller="mediagoblin.user_pages.views:atom_feed"),
     Route('mediagoblin.user_pages.media_post_comment',

mediagoblin/user_pages/views.py

@@ -20,11 +20,11 @@ from mediagoblin import messages, mg_globals
 from mediagoblin.db.util import DESCENDING, ObjectId
 from mediagoblin.util import (
     Pagination, render_to_response, redirect, cleaned_markdown_conversion,
-    render_404)
+    render_404, delete_media_files)
 from mediagoblin.user_pages import forms as user_forms
 
 from mediagoblin.decorators import (uses_pagination, get_user_media_entry,
-    require_active_login)
+    require_active_login, user_may_delete_media)
 
 from werkzeug.contrib.atom import AtomFeed
 
@@ -145,6 +145,36 @@ def media_post_comment(request):
         user = request.matchdict['user'])
 
 
+@get_user_media_entry
+@require_active_login
+@user_may_delete_media
+def media_confirm_delete(request, media):
+
+    form = user_forms.ConfirmDeleteForm(request.POST)
+
+    if request.method == 'POST' and form.validate():
+        if request.POST.get('confirm') == 'True':
+            username = media.uploader()['username']
+
+            # Delete all files on the public storage
+            delete_media_files(media)
+
+            media.delete()
+
+            return redirect(request, "mediagoblin.user_pages.user_home",
+                user=username)
+        else:
+            return redirect(request, "mediagoblin.user_pages.media_home",
+                            user=media.uploader()['username'],
+                            media=media['slug'])
+
+    return render_to_response(
+        request,
+        'mediagoblin/user_pages/media_confirm_delete.html',
+        {'media': media,
+         'form': form})
+
+
 ATOM_DEFAULT_NR_OF_UPDATED_ITEMS = 15
 
 def atom_feed(request):