Invalidate cache when theme uploaded (#12)

- Add episode to display page (leftover from #9)
- Show episode label based on structure (also #9)

src/MyWebLog.Domain/ViewModels.fs

@@ -745,6 +745,9 @@ type PostListItem =
         /// Tags for the post
         tags : string list
         
+        /// The podcast episode information for this post
+        episode : Episode option
+        
         /// Metadata for the post
         metadata : MetaItem list
     }
@@ -763,6 +766,7 @@ type PostListItem =
           text        = if extra = "" then post.text else post.text.Replace ("href=\"/", $"href=\"{extra}/")
           categoryIds = post.categoryIds |> List.map CategoryId.toString
           tags        = post.tags
+          episode     = post.episode
           metadata    = post.metadata
         }
 

src/MyWebLog/DotLiquidBespoke.fs

@@ -223,7 +223,8 @@ let register () =
     Template.RegisterTag<UserLinksTag> "user_links"
     
     [   // Domain types
-        typeof<CustomFeed>; typeof<MetaItem>; typeof<Page>; typeof<RssOptions>; typeof<TagMap>; typeof<WebLog>
+        typeof<CustomFeed>; typeof<Episode>; typeof<Episode option>; typeof<MetaItem>; typeof<Page>; typeof<RssOptions>
+        typeof<TagMap>;     typeof<WebLog>
         // View models
         typeof<DashboardModel>;        typeof<DisplayCategory>;     typeof<DisplayCustomFeed>; typeof<DisplayPage>
         typeof<EditCategoryModel>;     typeof<EditCustomFeedModel>; typeof<EditPageModel>;     typeof<EditPostModel>

src/MyWebLog/Handlers/Admin.fs

@@ -440,6 +440,7 @@ let updateTheme : HttpHandler = fun next ctx -> task {
             do! themeFile.CopyToAsync stream
             do! loadThemeFromZip themeName stream true data
             do! ThemeAssetCache.refreshTheme (ThemeId themeName) data
+            TemplateCache.invalidateTheme themeName
             do! addMessage ctx { UserMessage.success with message = "Theme updated successfully" }
             return! redirectToGet (WebLog.relativeUrl ctx.WebLog (Permalink "admin/dashboard")) next ctx
         | Ok _ ->

src/admin-theme/post-edit.liquid

@@ -66,7 +66,9 @@
                     <input type="text" name="media" id="media" class="form-control" placeholder="Media" required
                            value="{{ model.media }}">
                     <label for="media">Media File</label>
-                    <div class="form-text">Path to media; relative URL will be appended to base media path</div>
+                    <div class="form-text">
+                      Relative URL will be appended to base media path (if set) or served from this web log
+                    </div>
                   </div>
                 </div>
                 <div class="col-12 col-md-4 pb-3">
@@ -169,7 +171,7 @@
                            placeholder="Transcript Type" value="{{ model.transcript_type }}"
                            {%- if model.transcript_url != "" %} required{% endif %}>
                     <label for="transcriptType">Transcript MIME Type</label>
-                    <div class="form-text">Recommended if transcript file provided</div>
+                    <div class="form-text">Required if transcript URL provided</div>
                   </div>
                 </div>
               </div>

src/admin-theme/post-list.liquid

@@ -42,10 +42,7 @@
             </span>
           </div>
           <div class="{{ title_col }}">
-            {%- assign media = post.metadata | value: "episode_media_file" -%}
-            {%- unless media == "-- episode_media_file not found --" -%}
-              <span class="badge bg-success float-end text-uppercase">Episode</span>
-            {%- endunless -%}
+            {%- if post.episode %}<span class="badge bg-success float-end text-uppercase">Episode</span>{% endif -%}
             {{ post.title }}<br>
             <small>
               <a href="{{ post | relative_link }}" target="_blank">View Post</a>