refactor: context item retrieval logic

src/activitypub/contexts.js

@@ -35,31 +35,14 @@ Contexts.getItems = async (uid, id, root = true) => {
 		return [];
 	}
 
-	if (type.startsWith('Ordered')) {
+	if (type.startsWith('Ordered') && orderedItems) {
 		items = orderedItems;
 	}
 
 	if (items) {
-		items = (await Promise.all(items.map(async (item) => {
-			const { type, id } = await activitypub.helpers.resolveLocalId(item);
-			const pid = type === 'post' && id ? id : item;
-			const postData = await posts.getPostData(pid);
-			if (postData) {
-				// Already cached
-				return postData;
-			}
-
-			// No local copy, fetch from source
-			try {
-				const object = await activitypub.get('uid', uid, pid);
-				winston.verbose(`[activitypub/context] Retrieved ${pid}`);
-				return await activitypub.mocks.post(object);
-			} catch (e) {
-				// Unresolvable, either temporariliy or permanent, ignore for now.
-				winston.verbose(`[activitypub/context] Cannot retrieve ${id}`);
-				return null;
-			}
-		}))).filter(Boolean);
+		items = await Promise.all(items
+			.map(async item => (activitypub.helpers.isUri(item) ? parseString(uid, item) : parseItem(uid, item))));
+		items = items.filter(Boolean);
 		winston.verbose(`[activitypub/context] Found ${items.length} items.`);
 	}
 
@@ -79,3 +62,49 @@ Contexts.getItems = async (uid, id, root = true) => {
 
 	return chain;
 };
+
+async function parseString(uid, item) {
+	const { type, id } = await activitypub.helpers.resolveLocalId(item);
+	const pid = type === 'post' && id ? id : item;
+	const postData = await posts.getPostData(pid);
+	if (postData) {
+		// Already cached
+		return postData;
+	}
+
+	// No local copy, fetch from source
+	try {
+		const object = await activitypub.get('uid', uid, pid);
+		winston.verbose(`[activitypub/context] Retrieved ${pid}`);
+
+		return parseItem(uid, object);
+	} catch (e) {
+		// Unresolvable, either temporarily or permanent, ignore for now.
+		winston.verbose(`[activitypub/context] Cannot retrieve ${id}`);
+		return null;
+	}
+}
+
+async function parseItem(uid, item) {
+	const { type, id } = await activitypub.helpers.resolveLocalId(item.id);
+	const pid = type === 'post' && id ? id : item.id;
+	const postData = await posts.getPostData(pid);
+	if (postData) {
+		// Already cached
+		return postData;
+	}
+
+	// Handle activity wrapper
+	if (item.type === 'Create') {
+		item = item.object;
+		if (activitypub.helpers.isUri(item)) {
+			return parseString(uid, item);
+		}
+	} else if (!activitypub._constants.acceptedPostTypes.includes(item.type)) {
+		// Not a note, silently skip.
+		return null;
+	}
+
+	winston.verbose(`[activitypub/context] Parsing ${pid}`);
+	return await activitypub.mocks.post(item);
+}

src/activitypub/mocks.js

@@ -125,7 +125,7 @@ Mocks.post = async (objects) => {
 			// tid,  --> purposely omitted
 			name,
 			content,
-			sourceContent: source.mediaType === 'text/markdown' ? source.content : undefined,
+			sourceContent: source && source.mediaType === 'text/markdown' ? source.content : undefined,
 			timestamp,
 			toPid,