feat: Like(Note) and Undo(Like); federating likes

src/api/activitypub.js

@@ -28,6 +28,7 @@ activitypubApi.follow = async (caller, { uid } = {}) => {
 	});
 };
 
+// should be .undo.follow
 activitypubApi.unfollow = async (caller, { uid }) => {
 	const result = await activitypub.helpers.query(uid);
 	if (!result) {
@@ -112,3 +113,45 @@ activitypubApi.update.note = async (caller, { post }) => {
 
 	await activitypub.send(caller.uid, Array.from(targets), payload);
 };
+
+activitypubApi.like = {};
+
+activitypubApi.like.note = async (caller, { pid }) => {
+	if (!activitypub.helpers.isUri(pid)) {
+		return;
+	}
+
+	const uid = await posts.getPostField(pid, 'uid');
+	if (!activitypub.helpers.isUri(uid)) {
+		return;
+	}
+
+	await activitypub.send(caller.uid, [uid], {
+		type: 'Like',
+		object: pid,
+	});
+};
+
+activitypubApi.undo = {};
+
+// activitypubApi.undo.follow =
+
+activitypubApi.undo.like = async (caller, { pid }) => {
+	if (!activitypub.helpers.isUri(pid)) {
+		return;
+	}
+
+	const uid = await posts.getPostField(pid, 'uid');
+	if (!activitypub.helpers.isUri(uid)) {
+		return;
+	}
+
+	await activitypub.send(caller.uid, [uid], {
+		type: 'Undo',
+		object: {
+			actor: `${nconf.get('url')}/uid/${caller.uid}`,
+			type: 'Like',
+			object: pid,
+		},
+	});
+};

src/api/helpers.js

@@ -129,6 +129,7 @@ exports.postCommand = async function (caller, command, eventName, notification,
 };
 
 async function executeCommand(caller, command, eventName, notification, data) {
+	const api = require('.');
 	const result = await posts[command](data.pid, caller.uid);
 	if (result && eventName) {
 		websockets.in(`uid_${caller.uid}`).emit(`posts.${command}`, result);
@@ -136,10 +137,12 @@ async function executeCommand(caller, command, eventName, notification, data) {
 	}
 	if (result && command === 'upvote') {
 		socketHelpers.upvote(result, notification);
+		api.activitypub.like.note(caller, { pid: data.pid });
 	} else if (result && notification) {
 		socketHelpers.sendNotificationToPostOwner(data.pid, caller.uid, command, notification);
 	} else if (result && command === 'unvote') {
 		socketHelpers.rescindUpvoteNotification(data.pid, caller.uid);
+		api.activitypub.undo.like(caller, { pid: data.pid });
 	}
 	return result;
 }