feat: support the ability to search for posts and users by url

src/search.js

@@ -10,6 +10,7 @@ const categories = require('./categories');
 const user = require('./user');
 const plugins = require('./plugins');
 const privileges = require('./privileges');
+const activitypub = require('./activitypub');
 const utils = require('./utils');
 
 const search = module.exports;
@@ -71,12 +72,21 @@ async function searchInContent(data) {
 		pids = await topics.search(tid, cleanedTerm);
 	} else if (data.searchIn === 'bookmarks') {
 		pids = await searchInBookmarks(data, searchCids, searchUids);
+	} else {
+		let result;
+		if (data.uid && activitypub.helpers.isUri(data.query)) {
+			result = await fetchRemoteObject(data.uid, data.query);
+		}
+
+		if (result) {
+			[pids, tids] = result;
 		} else {
 			[pids, tids] = await Promise.all([
 				doSearch('post', ['posts', 'titlesposts']),
 				doSearch('topic', ['titles', 'titlesposts']),
 			]);
 		}
+	}
 
 	const mainPids = await topics.getMainPids(tids);
 
@@ -118,6 +128,30 @@ async function searchInContent(data) {
 	return Object.assign(returnData, metadata);
 }
 
+async function fetchRemoteObject(uid, uri) {
+	try {
+		let id = uri;
+		let exists = await posts.exists(id);
+		let tid = exists ? await posts.getPostField(id, 'tid') : undefined;
+		if (!exists) {
+			let type;
+			({ id, type } = await activitypub.get('uid', 0, id));
+			if (activitypub._constants.acceptedPostTypes.includes(type)) {
+				exists = await posts.exists(id);
+				if (!exists) {
+					({ tid } = await activitypub.notes.assert(uid, id));
+				} else {
+					tid = await posts.getPostField(id, 'tid');
+				}
+			}
+		}
+
+		return tid ? [[id], []] : null;
+	} catch (e) {
+		return null;
+	}
+}
+
 async function searchInBookmarks(data, searchCids, searchUids) {
 	const { uid, query, matchWords } = data;
 	const allPids = [];

src/user/search.js

@@ -41,6 +41,16 @@ module.exports = function (User) {
 		} else if (searchBy === 'uid') {
 			uids = [query];
 		} else {
+			if (!data.findUids && data.uid && activitypub.helpers.isUri(data.query)) {
+				const assertion = await activitypub.actors.assert([data.query]);
+				if (assertion === true) {
+					uids = [query];
+				} else if (Array.isArray(assertion) && assertion.length) {
+					uids = assertion.map(u => u.id);
+				}
+			}
+
+			if (!uids.length) {
 				const searchMethod = data.findUids || findUids;
 				uids = await searchMethod(query, searchBy, data.hardCap);
 
@@ -52,6 +62,7 @@ module.exports = function (User) {
 					uids = uids.concat(await searchMethod(query, mapping[searchBy], data.hardCap));
 				}
 			}
+		}
 
 		uids = await filterAndSortUids(uids, data);
 		if (data.hardCap > 0) {