Initial commit 🍀

src/api/endpoints/aggregation/posts/likes.js

@@ -0,0 +1,76 @@
+'use strict';
+
+/**
+ * Module dependencies
+ */
+import * as mongo from 'mongodb';
+import Post from '../../../models/post';
+import Like from '../../../models/like';
+
+/**
+ * Aggregate likes of a post
+ *
+ * @param {Object} params
+ * @return {Promise<object>}
+ */
+module.exports = (params) =>
+	new Promise(async (res, rej) =>
+{
+	// Get 'post_id' parameter
+	const postId = params.post_id;
+	if (postId === undefined || postId === null) {
+		return rej('post_id is required');
+	}
+
+	// Lookup post
+	const post = await Post.findOne({
+		_id: new mongo.ObjectID(postId)
+	});
+
+	if (post === null) {
+		return rej('post not found');
+	}
+
+	const startTime = new Date(new Date().setMonth(new Date().getMonth() - 1));
+
+	const likes = await Like
+		.find({
+			post_id: post._id,
+			$or: [
+				{ deleted_at: { $exists: false } },
+				{ deleted_at: { $gt: startTime } }
+			]
+		}, {
+			_id: false,
+			post_id: false
+		}, {
+			sort: { created_at: -1 }
+		})
+		.toArray();
+
+	const graph = [];
+
+	for (let i = 0; i < 30; i++) {
+		let day = new Date(new Date().setDate(new Date().getDate() - i));
+		day = new Date(day.setMilliseconds(999));
+		day = new Date(day.setSeconds(59));
+		day = new Date(day.setMinutes(59));
+		day = new Date(day.setHours(23));
+		//day = day.getTime();
+
+		const count = likes.filter(l =>
+			l.created_at < day && (l.deleted_at == null || l.deleted_at > day)
+		).length;
+
+		graph.push({
+			date: {
+				year: day.getFullYear(),
+				month: day.getMonth() + 1, // In JavaScript, month is zero-based.
+				day: day.getDate()
+			},
+			count: count
+		});
+	}
+
+	res(graph);
+});