feat(api): #9123, migrate rest of the getObject controllers to Write API

src/api/categories.js

@@ -2,9 +2,22 @@
 
 const categories = require('../categories');
 const events = require('../events');
+const privileges = require('../privileges');
 
 const categoriesAPI = module.exports;
 
+categoriesAPI.get = async function (caller, data) {
+	const [userPrivileges, category] = await Promise.all([
+		privileges.categories.get(data.cid, caller.uid),
+		categories.getCategoryData(data.cid),
+	]);
+	if (!category || !userPrivileges.read) {
+		return null;
+	}
+
+	return category;
+};
+
 categoriesAPI.create = async function (caller, data) {
 	const response = await categories.create(data);
 	const categoryObjs = await categories.getCategories([response.cid], caller.uid);

src/api/topics.js

@@ -4,6 +4,7 @@ const user = require('../user');
 const topics = require('../topics');
 const posts = require('../posts');
 const meta = require('../meta');
+const privileges = require('../privileges');
 
 const apiHelpers = require('./helpers');
 const doTopicAction = apiHelpers.doTopicAction;
@@ -13,6 +14,18 @@ const socketHelpers = require('../socket.io/helpers');
 
 const topicsAPI = module.exports;
 
+topicsAPI.get = async function (caller, data) {
+	const [userPrivileges, topic] = await Promise.all([
+		privileges.topics.get(data.tid, caller.uid),
+		topics.getTopicData(data.tid),
+	]);
+	if (!topic || !userPrivileges.read || !userPrivileges['topics:read'] || (topic.deleted && !userPrivileges.view_deleted)) {
+		return null;
+	}
+
+	return topic;
+};
+
 topicsAPI.create = async function (caller, data) {
 	if (!data) {
 		throw new Error('[[error:invalid-data]]');