From b3f42e62af698a67c2250533c437569559f1fdf9 Mon Sep 17 00:00:00 2001
From: syuilo <syuilotan@yahoo.co.jp>
Date: Thu, 29 Dec 2016 07:49:51 +0900
Subject: Initial commit :four_leaf_clover:

---
 src/api/endpoints/users/recommendation.js | 61 +++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 src/api/endpoints/users/recommendation.js

(limited to 'src/api/endpoints/users/recommendation.js')

diff --git a/src/api/endpoints/users/recommendation.js b/src/api/endpoints/users/recommendation.js
new file mode 100644
index 0000000000..9daab0ec57
--- /dev/null
+++ b/src/api/endpoints/users/recommendation.js
@@ -0,0 +1,61 @@
+'use strict';
+
+/**
+ * Module dependencies
+ */
+import User from '../../models/user';
+import serialize from '../../serializers/user';
+import getFriends from '../../common/get-friends';
+
+/**
+ * Get recommended users
+ *
+ * @param {Object} params
+ * @param {Object} me
+ * @return {Promise<object>}
+ */
+module.exports = (params, me) =>
+	new Promise(async (res, rej) =>
+{
+	// Get 'limit' parameter
+	let limit = params.limit;
+	if (limit !== undefined && limit !== null) {
+		limit = parseInt(limit, 10);
+
+		// From 1 to 100
+		if (!(1 <= limit && limit <= 100)) {
+			return rej('invalid limit range');
+		}
+	} else {
+		limit = 10;
+	}
+
+	// Get 'offset' parameter
+	let offset = params.offset;
+	if (offset !== undefined && offset !== null) {
+		offset = parseInt(offset, 10);
+	} else {
+		offset = 0;
+	}
+
+	// ID list of the user itself and other users who the user follows
+	const followingIds = await getFriends(me._id);
+
+	const users = await User
+		.find({
+			_id: {
+				$nin: followingIds
+			}
+		}, {}, {
+			limit: limit,
+			skip: offset,
+			sort: {
+				followers_count: -1
+			}
+		})
+		.toArray();
+
+	// Serialize
+	res(await Promise.all(users.map(async user =>
+		await serialize(user, me, { detail: true }))));
+});
-- 
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