Update Bluesky.ts

An attempt to order posts by their position in the page.

src/engines/Bluesky.ts

@@ -26,21 +26,23 @@ export default class Bluesky extends ScrapeEngineBase {
 
   scrapeDocument(document: Document): ScrapeResult {
     const result = new ScrapeResult(this.name);
+	
+	type Candidate = { el: Element; post: ScrapedPost };
+	const candidates: Candidate[] = [];
+	
+	// Images
     const imgEls = Array.from<HTMLImageElement>(document.querySelectorAll("div > img"));
-
     let els = imgEls.filter((x) => x.src.indexOf("feed_fullsize") != -1);
-
     // Only add the 'normal' feed elements if no post is in fullscreen.
     if (els.length == 0) {
       this.log("Post is not fullscreen.");
       els = imgEls.filter((x) => x.src.indexOf("feed") != -1);
     }
-
     for (const el of els) {
       const post = new ScrapedPost();
       post.pageUrl = document.location.href;
       post.contentUrl = getFullSizeImg(el.src);
-      result.tryAddPost(post);
+      candidates.push({ el, post });
     }
 
     // Videos
@@ -56,14 +58,22 @@ export default class Bluesky extends ScrapeEngineBase {
         this.log(`Could not parse poster URL: ${poster}`);
         continue;
       }
-
       const post = new ScrapedPost();
       post.pageUrl = document.location.href;
       post.contentUrl = blobUrl;
       post.contentType = "video";
-      result.tryAddPost(post);
+      candidates.push({ el: v, post });
     }
 	
+	candidates.sort((a, b) => {
+      const pos = a.el.compareDocumentPosition(b.el);
+      if (pos & Node.DOCUMENT_POSITION_FOLLOWING) return -1;
+      if (pos & Node.DOCUMENT_POSITION_PRECEDING) return 1;
+      return 0;
+    });
+	
+	for(const c of candidates) result.tryAddPost(c.post);
+
     return result;
   }