Introduce processor

src/server/api/endpoints/users/posts.ts

@@ -0,0 +1,137 @@
+/**
+ * Module dependencies
+ */
+import $ from 'cafy';
+import getHostLower from '../../common/get-host-lower';
+import Post, { pack } from '../../models/post';
+import User from '../../models/user';
+
+/**
+ * Get posts of a user
+ *
+ * @param {any} params
+ * @param {any} me
+ * @return {Promise<any>}
+ */
+module.exports = (params, me) => new Promise(async (res, rej) => {
+	// Get 'user_id' parameter
+	const [userId, userIdErr] = $(params.user_id).optional.id().$;
+	if (userIdErr) return rej('invalid user_id param');
+
+	// Get 'username' parameter
+	const [username, usernameErr] = $(params.username).optional.string().$;
+	if (usernameErr) return rej('invalid username param');
+
+	if (userId === undefined && username === undefined) {
+		return rej('user_id or pair of username and host is required');
+	}
+
+	// Get 'host' parameter
+	const [host, hostErr] = $(params.host).optional.string().$;
+	if (hostErr) return rej('invalid host param');
+
+	if (userId === undefined && host === undefined) {
+		return rej('user_id or pair of username and host is required');
+	}
+
+	// Get 'include_replies' parameter
+	const [includeReplies = true, includeRepliesErr] = $(params.include_replies).optional.boolean().$;
+	if (includeRepliesErr) return rej('invalid include_replies param');
+
+	// Get 'with_media' parameter
+	const [withMedia = false, withMediaErr] = $(params.with_media).optional.boolean().$;
+	if (withMediaErr) return rej('invalid with_media param');
+
+	// Get 'limit' parameter
+	const [limit = 10, limitErr] = $(params.limit).optional.number().range(1, 100).$;
+	if (limitErr) return rej('invalid limit param');
+
+	// Get 'since_id' parameter
+	const [sinceId, sinceIdErr] = $(params.since_id).optional.id().$;
+	if (sinceIdErr) return rej('invalid since_id param');
+
+	// Get 'until_id' parameter
+	const [untilId, untilIdErr] = $(params.until_id).optional.id().$;
+	if (untilIdErr) return rej('invalid until_id param');
+
+	// Get 'since_date' parameter
+	const [sinceDate, sinceDateErr] = $(params.since_date).optional.number().$;
+	if (sinceDateErr) throw 'invalid since_date param';
+
+	// Get 'until_date' parameter
+	const [untilDate, untilDateErr] = $(params.until_date).optional.number().$;
+	if (untilDateErr) throw 'invalid until_date param';
+
+	// Check if only one of since_id, until_id, since_date, until_date specified
+	if ([sinceId, untilId, sinceDate, untilDate].filter(x => x != null).length > 1) {
+		throw 'only one of since_id, until_id, since_date, until_date can be specified';
+	}
+
+	const q = userId !== undefined
+		? { _id: userId }
+		: { username_lower: username.toLowerCase(), host_lower: getHostLower(host) } ;
+
+	// Lookup user
+	const user = await User.findOne(q, {
+		fields: {
+			_id: true
+		}
+	});
+
+	if (user === null) {
+		return rej('user not found');
+	}
+
+	//#region Construct query
+	const sort = {
+		_id: -1
+	};
+
+	const query = {
+		user_id: user._id
+	} as any;
+
+	if (sinceId) {
+		sort._id = 1;
+		query._id = {
+			$gt: sinceId
+		};
+	} else if (untilId) {
+		query._id = {
+			$lt: untilId
+		};
+	} else if (sinceDate) {
+		sort._id = 1;
+		query.created_at = {
+			$gt: new Date(sinceDate)
+		};
+	} else if (untilDate) {
+		query.created_at = {
+			$lt: new Date(untilDate)
+		};
+	}
+
+	if (!includeReplies) {
+		query.reply_id = null;
+	}
+
+	if (withMedia) {
+		query.media_ids = {
+			$exists: true,
+			$ne: null
+		};
+	}
+	//#endregion
+
+	// Issue query
+	const posts = await Post
+		.find(query, {
+			limit: limit,
+			sort: sort
+		});
+
+	// Serialize
+	res(await Promise.all(posts.map(async (post) =>
+		await pack(post, me)
+	)));
+});