Introduce processor

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

@@ -0,0 +1,53 @@
+/**
+ * Module dependencies
+ */
+import $ from 'cafy';
+import Post, { pack } from '../../models/post';
+
+/**
+ * Show a replies 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] = $(params.post_id).id().$;
+	if (postIdErr) return rej('invalid post_id param');
+
+	// Get 'limit' parameter
+	const [limit = 10, limitErr] = $(params.limit).optional.number().range(1, 100).$;
+	if (limitErr) return rej('invalid limit param');
+
+	// Get 'offset' parameter
+	const [offset = 0, offsetErr] = $(params.offset).optional.number().min(0).$;
+	if (offsetErr) return rej('invalid offset param');
+
+	// Get 'sort' parameter
+	const [sort = 'desc', sortError] = $(params.sort).optional.string().or('desc asc').$;
+	if (sortError) return rej('invalid sort param');
+
+	// Lookup post
+	const post = await Post.findOne({
+		_id: postId
+	});
+
+	if (post === null) {
+		return rej('post not found');
+	}
+
+	// Issue query
+	const replies = await Post
+		.find({ reply_id: post._id }, {
+			limit: limit,
+			skip: offset,
+			sort: {
+				_id: sort == 'asc' ? 1 : -1
+			}
+		});
+
+	// Serialize
+	res(await Promise.all(replies.map(async post =>
+		await pack(post, user))));
+});