[podcast] Improve Parsing (#17)

This commit improves the parsing of the RSS feeds for a podcast, because
some podcasts were not working as expected:

- The "https://gotime.fm/rss" podcast uses the "itunes:image" field for
  the podcast icon instead of "image", so that we now looking at both
  fields to add the podcast icon.
- The "https://itsallwidgets.com/podcast/feed" podcast didn't contain a
  link in the entries, so that all entries were skipped. For that a
  podcast must not contain a link anymore to be parsed, but most contain
  a media file which can be played within the app.

supabase/functions/_shared/feed/podcast.ts

@@ -68,8 +68,12 @@ export const getPodcastFeed = async (
   if (feed.links.length > 0) {
     source.link = feed.links[0];
   }
-  if (feed.image?.url) {
-    source.icon = feed.image?.url;
+  if (
+    // deno-lint-ignore no-explicit-any
+    !source.icon && (feed.image?.url || (feed as any)["itunes:image"]?.href)
+  ) {
+    // deno-lint-ignore no-explicit-any
+    source.icon = feed.image?.url || (feed as any)["itunes:image"]?.href;
     source.icon = await uploadSourceIcon(supabaseClient, source);
   }
 
@@ -85,13 +89,12 @@ export const getPodcastFeed = async (
       break;
     }
 
+    const media = getMedia(entry);
+
     /**
-     * If the entry does not contain a title, a link or a published date we skip it.
+     * If the entry does not contain a title,  a published date or a media file we skip it.
      */
-    if (
-      !entry.title?.value ||
-      (entry.links.length === 0 || !entry.links[0].href) || !entry.published
-    ) {
+    if (!entry.title?.value || !entry.published || !media) {
       continue;
     }
 
@@ -103,7 +106,7 @@ export const getPodcastFeed = async (
     let itemId = "";
     if (entry.id != "") {
       itemId = generateItemId(source.id, entry.id);
-    } else if (entry.links.length > 0 && entry.links[0].href) {
+    } else if (entry.links && entry.links.length > 0 && entry.links[0].href) {
       itemId = generateItemId(source.id, entry.links[0].href);
     } else {
       continue;
@@ -115,8 +118,10 @@ export const getPodcastFeed = async (
       columnId: source.columnId,
       sourceId: source.id,
       title: entry.title.value,
-      link: entry.links[0].href,
-      media: getMedia(entry),
+      link: entry.links && entry.links.length > 0 && entry.links[0].href
+        ? entry.links[0].href
+        : media,
+      media: media,
       description: entry.description?.value
         ? unescape(entry.description.value)
         : undefined,