1 files changed, 78 insertions, 0 deletions
diff --git a/src/api/endpoints/posts/reposts.ts b/src/api/endpoints/posts/reposts.ts
new file mode 100644
index 0000000000..d8410b322b
--- /dev/null
+++ b/src/api/endpoints/posts/reposts.ts
@@ -0,0 +1,78 @@
+'use strict';
+
+/**
+ * Module dependencies
+ */
+import it from '../../it';
+import Post from '../../models/post';
+import serialize from '../../serializers/post';
+
+/**
+ * Show a reposts of a post
+ *
+ * @param {any} params
+ * @param {any} user
+ * @return {Promise<any>}
+ */
+module.exports = (params, user) =>
+	new Promise(async (res, rej) =>
+{
+	// Get 'post_id' parameter
+	const [postId, postIdErr] = it(params.post_id, 'id', true);
+	if (postIdErr) return rej('invalid post_id param');
+
+	// Get 'limit' parameter
+	const [limit, limitErr] = it(params.limit).expect.number().range(1, 100).default(10).qed();
+	if (limitErr) return rej('invalid limit param');
+
+	// Get 'since_id' parameter
+	const [sinceId, sinceIdErr] = it(params.since_id).expect.id().qed();
+	if (sinceIdErr) return rej('invalid since_id param');
+
+	// Get 'max_id' parameter
+	const [maxId, maxIdErr] = it(params.max_id).expect.id().qed();
+	if (maxIdErr) return rej('invalid max_id param');
+
+	// Check if both of since_id and max_id is specified
+	if (sinceId !== null && maxId !== null) {
+		return rej('cannot set since_id and max_id');
+	}
+
+	// Lookup post
+	const post = await Post.findOne({
+		_id: postId
+	});
+
+	if (post === null) {
+		return rej('post not found');
+	}
+
+	// Construct query
+	const sort = {
+		_id: -1
+	};
+	const query = {
+		repost_id: post._id
+	} as any;
+	if (sinceId) {
+		sort._id = 1;
+		query._id = {
+			$gt: sinceId
+		};
+	} else if (maxId) {
+		query._id = {
+			$lt: maxId
+		};
+	}
+
+	// Issue query
+	const reposts = await Post
+		.find(query, {
+			limit: limit,
+			sort: sort
+		});
+
+	// Serialize
+	res(await Promise.all(reposts.map(async post =>
+		await serialize(post, user))));
+});