Update podcasts to new library item model

server/models/Podcast.js

@@ -259,6 +259,10 @@ class Podcast extends Model {
       this.autoDownloadSchedule = payload.autoDownloadSchedule
       hasUpdates = true
     }
+    if (typeof payload.lastEpisodeCheck === 'number' && payload.lastEpisodeCheck !== this.lastEpisodeCheck?.valueOf()) {
+      this.lastEpisodeCheck = payload.lastEpisodeCheck
+      hasUpdates = true
+    }
 
     const numberKeys = ['maxEpisodesToKeep', 'maxNewEpisodesToDownload']
     numberKeys.forEach((key) => {
@@ -348,6 +352,31 @@ class Podcast extends Model {
     return episode.duration
   }
 
+  /**
+   *
+   * @returns {number} - Unix timestamp
+   */
+  getLatestEpisodePublishedAt() {
+    return this.podcastEpisodes.reduce((latest, episode) => {
+      if (episode.publishedAt?.valueOf() > latest) {
+        return episode.publishedAt.valueOf()
+      }
+      return latest
+    }, 0)
+  }
+
+  /**
+   * Used for checking if an rss feed episode is already in the podcast
+   *
+   * @param {Object} feedEpisode - object from rss feed
+   * @returns {boolean}
+   */
+  checkHasEpisodeByFeedEpisode(feedEpisode) {
+    const guid = feedEpisode.guid
+    const url = feedEpisode.enclosure.url
+    return this.podcastEpisodes.some((ep) => ep.checkMatchesGuidOrEnclosureUrl(guid, url))
+  }
+
   /**
    * Old model kept metadata in a separate object
    */

server/models/PodcastEpisode.js

@@ -143,6 +143,23 @@ class PodcastEpisode extends Model {
     return this.audioFile?.duration || 0
   }
 
+  /**
+   * Used for matching the episode with an episode in the RSS feed
+   *
+   * @param {string} guid
+   * @param {string} enclosureURL
+   * @returns {boolean}
+   */
+  checkMatchesGuidOrEnclosureUrl(guid, enclosureURL) {
+    if (this.extraData?.guid && this.extraData.guid === guid) {
+      return true
+    }
+    if (this.enclosureURL && this.enclosureURL === enclosureURL) {
+      return true
+    }
+    return false
+  }
+
   /**
    * Used in client players
    *