11 files changed, 902 insertions, 0 deletions
diff --git a/src/server/api/endpoints/aggregation/posts.ts b/src/server/api/endpoints/aggregation/posts.ts
new file mode 100644
index 0000000000..9d8bccbdb2
--- /dev/null
+++ b/src/server/api/endpoints/aggregation/posts.ts
@@ -0,0 +1,90 @@
+/**
+ * Module dependencies
+ */
+import $ from 'cafy';
+import Post from '../../models/post';
+
+/**
+ * Aggregate posts
+ *
+ * @param {any} params
+ * @return {Promise<any>}
+ */
+module.exports = params => new Promise(async (res, rej) => {
+	// Get 'limit' parameter
+	const [limit = 365, limitErr] = $(params.limit).optional.number().range(1, 365).$;
+	if (limitErr) return rej('invalid limit param');
+
+	const datas = await Post
+		.aggregate([
+			{ $project: {
+				repost_id: '$repost_id',
+				reply_id: '$reply_id',
+				created_at: { $add: ['$created_at', 9 * 60 * 60 * 1000] } // Convert into JST
+			}},
+			{ $project: {
+				date: {
+					year: { $year: '$created_at' },
+					month: { $month: '$created_at' },
+					day: { $dayOfMonth: '$created_at' }
+				},
+				type: {
+					$cond: {
+						if: { $ne: ['$repost_id', null] },
+						then: 'repost',
+						else: {
+							$cond: {
+								if: { $ne: ['$reply_id', null] },
+								then: 'reply',
+								else: 'post'
+							}
+						}
+					}
+				}}
+			},
+			{ $group: { _id: {
+				date: '$date',
+				type: '$type'
+			}, count: { $sum: 1 } } },
+			{ $group: {
+				_id: '$_id.date',
+				data: { $addToSet: {
+					type: '$_id.type',
+					count: '$count'
+				}}
+			} }
+		]);
+
+	datas.forEach(data => {
+		data.date = data._id;
+		delete data._id;
+
+		data.posts = (data.data.filter(x => x.type == 'post')[0] || { count: 0 }).count;
+		data.reposts = (data.data.filter(x => x.type == 'repost')[0] || { count: 0 }).count;
+		data.replies = (data.data.filter(x => x.type == 'reply')[0] || { count: 0 }).count;
+
+		delete data.data;
+	});
+
+	const graph = [];
+
+	for (let i = 0; i < limit; i++) {
+		const day = new Date(new Date().setDate(new Date().getDate() - i));
+
+		const data = datas.filter(d =>
+			d.date.year == day.getFullYear() && d.date.month == day.getMonth() + 1 && d.date.day == day.getDate()
+		)[0];
+
+		if (data) {
+			graph.push(data);
+		} else {
+			graph.push({
+				posts: 0,
+				reposts: 0,
+				replies: 0
+			});
+		}
+	}
+
+	res(graph);
+});
diff --git a/src/server/api/endpoints/aggregation/posts/reaction.ts b/src/server/api/endpoints/aggregation/posts/reaction.ts
new file mode 100644
index 0000000000..eb99b9d088
--- /dev/null
+++ b/src/server/api/endpoints/aggregation/posts/reaction.ts
@@ -0,0 +1,76 @@
+/**
+ * Module dependencies
+ */
+import $ from 'cafy';
+import Post from '../../../models/post';
+import Reaction from '../../../models/post-reaction';
+
+/**
+ * Aggregate reaction of a post
+ *
+ * @param {any} params
+ * @return {Promise<any>}
+ */
+module.exports = (params) => new Promise(async (res, rej) => {
+	// Get 'post_id' parameter
+	const [postId, postIdErr] = $(params.post_id).id().$;
+	if (postIdErr) return rej('invalid post_id param');
+
+	// Lookup post
+	const post = await Post.findOne({
+		_id: postId
+	});
+
+	if (post === null) {
+		return rej('post not found');
+	}
+
+	const datas = await Reaction
+		.aggregate([
+			{ $match: { post_id: post._id } },
+			{ $project: {
+				created_at: { $add: ['$created_at', 9 * 60 * 60 * 1000] } // Convert into JST
+			}},
+			{ $project: {
+				date: {
+					year: { $year: '$created_at' },
+					month: { $month: '$created_at' },
+					day: { $dayOfMonth: '$created_at' }
+				}
+			}},
+			{ $group: {
+				_id: '$date',
+				count: { $sum: 1 }
+			}}
+		]);
+
+	datas.forEach(data => {
+		data.date = data._id;
+		delete data._id;
+	});
+
+	const graph = [];
+
+	for (let i = 0; i < 30; i++) {
+		const day = new Date(new Date().setDate(new Date().getDate() - i));
+
+		const data = datas.filter(d =>
+			d.date.year == day.getFullYear() && d.date.month == day.getMonth() + 1 && d.date.day == day.getDate()
+		)[0];
+
+		if (data) {
+			graph.push(data);
+		} else {
+			graph.push({
+				date: {
+					year: day.getFullYear(),
+					month: day.getMonth() + 1, // In JavaScript, month is zero-based.
+					day: day.getDate()
+				},
+				count: 0
+			});
+		}
+	}
+
+	res(graph);
+});
diff --git a/src/server/api/endpoints/aggregation/posts/reactions.ts b/src/server/api/endpoints/aggregation/posts/reactions.ts
new file mode 100644
index 0000000000..790b523be9
--- /dev/null
+++ b/src/server/api/endpoints/aggregation/posts/reactions.ts
@@ -0,0 +1,72 @@
+/**
+ * Module dependencies
+ */
+import $ from 'cafy';
+import Post from '../../../models/post';
+import Reaction from '../../../models/post-reaction';
+
+/**
+ * Aggregate reactions of a post
+ *
+ * @param {any} params
+ * @return {Promise<any>}
+ */
+module.exports = (params) => new Promise(async (res, rej) => {
+	// Get 'post_id' parameter
+	const [postId, postIdErr] = $(params.post_id).id().$;
+	if (postIdErr) return rej('invalid post_id param');
+
+	// Lookup post
+	const post = await Post.findOne({
+		_id: postId
+	});
+
+	if (post === null) {
+		return rej('post not found');
+	}
+
+	const startTime = new Date(new Date().setMonth(new Date().getMonth() - 1));
+
+	const reactions = await Reaction
+		.find({
+			post_id: post._id,
+			$or: [
+				{ deleted_at: { $exists: false } },
+				{ deleted_at: { $gt: startTime } }
+			]
+		}, {
+			sort: {
+				_id: -1
+			},
+			fields: {
+				_id: false,
+				post_id: false
+			}
+		});
+
+	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 = reactions.filter(r =>
+			r.created_at < day && (r.deleted_at == null || r.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);
+});
diff --git a/src/server/api/endpoints/aggregation/posts/reply.ts b/src/server/api/endpoints/aggregation/posts/reply.ts
new file mode 100644
index 0000000000..b114c34e1e
--- /dev/null
+++ b/src/server/api/endpoints/aggregation/posts/reply.ts
@@ -0,0 +1,75 @@
+/**
+ * Module dependencies
+ */
+import $ from 'cafy';
+import Post from '../../../models/post';
+
+/**
+ * Aggregate reply of a post
+ *
+ * @param {any} params
+ * @return {Promise<any>}
+ */
+module.exports = (params) => new Promise(async (res, rej) => {
+	// Get 'post_id' parameter
+	const [postId, postIdErr] = $(params.post_id).id().$;
+	if (postIdErr) return rej('invalid post_id param');
+
+	// Lookup post
+	const post = await Post.findOne({
+		_id: postId
+	});
+
+	if (post === null) {
+		return rej('post not found');
+	}
+
+	const datas = await Post
+		.aggregate([
+			{ $match: { reply: post._id } },
+			{ $project: {
+				created_at: { $add: ['$created_at', 9 * 60 * 60 * 1000] } // Convert into JST
+			}},
+			{ $project: {
+				date: {
+					year: { $year: '$created_at' },
+					month: { $month: '$created_at' },
+					day: { $dayOfMonth: '$created_at' }
+				}
+			}},
+			{ $group: {
+				_id: '$date',
+				count: { $sum: 1 }
+			}}
+		]);
+
+	datas.forEach(data => {
+		data.date = data._id;
+		delete data._id;
+	});
+
+	const graph = [];
+
+	for (let i = 0; i < 30; i++) {
+		const day = new Date(new Date().setDate(new Date().getDate() - i));
+
+		const data = datas.filter(d =>
+			d.date.year == day.getFullYear() && d.date.month == day.getMonth() + 1 && d.date.day == day.getDate()
+		)[0];
+
+		if (data) {
+			graph.push(data);
+		} else {
+			graph.push({
+				date: {
+					year: day.getFullYear(),
+					month: day.getMonth() + 1, // In JavaScript, month is zero-based.
+					day: day.getDate()
+				},
+				count: 0
+			});
+		}
+	}
+
+	res(graph);
+});
diff --git a/src/server/api/endpoints/aggregation/posts/repost.ts b/src/server/api/endpoints/aggregation/posts/repost.ts
new file mode 100644
index 0000000000..217159caa7
--- /dev/null
+++ b/src/server/api/endpoints/aggregation/posts/repost.ts
@@ -0,0 +1,75 @@
+/**
+ * Module dependencies
+ */
+import $ from 'cafy';
+import Post from '../../../models/post';
+
+/**
+ * Aggregate repost of a post
+ *
+ * @param {any} params
+ * @return {Promise<any>}
+ */
+module.exports = (params) => new Promise(async (res, rej) => {
+	// Get 'post_id' parameter
+	const [postId, postIdErr] = $(params.post_id).id().$;
+	if (postIdErr) return rej('invalid post_id param');
+
+	// Lookup post
+	const post = await Post.findOne({
+		_id: postId
+	});
+
+	if (post === null) {
+		return rej('post not found');
+	}
+
+	const datas = await Post
+		.aggregate([
+			{ $match: { repost_id: post._id } },
+			{ $project: {
+				created_at: { $add: ['$created_at', 9 * 60 * 60 * 1000] } // Convert into JST
+			}},
+			{ $project: {
+				date: {
+					year: { $year: '$created_at' },
+					month: { $month: '$created_at' },
+					day: { $dayOfMonth: '$created_at' }
+				}
+			}},
+			{ $group: {
+				_id: '$date',
+				count: { $sum: 1 }
+			}}
+		]);
+
+	datas.forEach(data => {
+		data.date = data._id;
+		delete data._id;
+	});
+
+	const graph = [];
+
+	for (let i = 0; i < 30; i++) {
+		const day = new Date(new Date().setDate(new Date().getDate() - i));
+
+		const data = datas.filter(d =>
+			d.date.year == day.getFullYear() && d.date.month == day.getMonth() + 1 && d.date.day == day.getDate()
+		)[0];
+
+		if (data) {
+			graph.push(data);
+		} else {
+			graph.push({
+				date: {
+					year: day.getFullYear(),
+					month: day.getMonth() + 1, // In JavaScript, month is zero-based.
+					day: day.getDate()
+				},
+				count: 0
+			});
+		}
+	}
+
+	res(graph);
+});
diff --git a/src/server/api/endpoints/aggregation/users.ts b/src/server/api/endpoints/aggregation/users.ts
new file mode 100644
index 0000000000..e38ce92ff9
--- /dev/null
+++ b/src/server/api/endpoints/aggregation/users.ts
@@ -0,0 +1,61 @@
+/**
+ * Module dependencies
+ */
+import $ from 'cafy';
+import User from '../../models/user';
+
+/**
+ * Aggregate users
+ *
+ * @param {any} params
+ * @return {Promise<any>}
+ */
+module.exports = params => new Promise(async (res, rej) => {
+	// Get 'limit' parameter
+	const [limit = 365, limitErr] = $(params.limit).optional.number().range(1, 365).$;
+	if (limitErr) return rej('invalid limit param');
+
+	const users = await User
+		.find({}, {
+			sort: {
+				_id: -1
+			},
+			fields: {
+				_id: false,
+				created_at: true,
+				deleted_at: true
+			}
+		});
+
+	const graph = [];
+
+	for (let i = 0; i < limit; i++) {
+		let dayStart = new Date(new Date().setDate(new Date().getDate() - i));
+		dayStart = new Date(dayStart.setMilliseconds(0));
+		dayStart = new Date(dayStart.setSeconds(0));
+		dayStart = new Date(dayStart.setMinutes(0));
+		dayStart = new Date(dayStart.setHours(0));
+
+		let dayEnd = new Date(new Date().setDate(new Date().getDate() - i));
+		dayEnd = new Date(dayEnd.setMilliseconds(999));
+		dayEnd = new Date(dayEnd.setSeconds(59));
+		dayEnd = new Date(dayEnd.setMinutes(59));
+		dayEnd = new Date(dayEnd.setHours(23));
+		// day = day.getTime();
+
+		const total = users.filter(u =>
+			u.created_at < dayEnd && (u.deleted_at == null || u.deleted_at > dayEnd)
+		).length;
+
+		const created = users.filter(u =>
+			u.created_at < dayEnd && u.created_at > dayStart
+		).length;
+
+		graph.push({
+			total: total,
+			created: created
+		});
+	}
+
+	res(graph);
+});
diff --git a/src/server/api/endpoints/aggregation/users/activity.ts b/src/server/api/endpoints/aggregation/users/activity.ts
new file mode 100644
index 0000000000..102a71d7cb
--- /dev/null
+++ b/src/server/api/endpoints/aggregation/users/activity.ts
@@ -0,0 +1,116 @@
+/**
+ * Module dependencies
+ */
+import $ from 'cafy';
+import User from '../../../models/user';
+import Post from '../../../models/post';
+
+// TODO: likeやfollowも集計
+
+/**
+ * Aggregate activity of a user
+ *
+ * @param {any} params
+ * @return {Promise<any>}
+ */
+module.exports = (params) => new Promise(async (res, rej) => {
+	// Get 'limit' parameter
+	const [limit = 365, limitErr] = $(params.limit).optional.number().range(1, 365).$;
+	if (limitErr) return rej('invalid limit param');
+
+	// Get 'user_id' parameter
+	const [userId, userIdErr] = $(params.user_id).id().$;
+	if (userIdErr) return rej('invalid user_id param');
+
+	// Lookup user
+	const user = await User.findOne({
+		_id: userId
+	}, {
+		fields: {
+			_id: true
+		}
+	});
+
+	if (user === null) {
+		return rej('user not found');
+	}
+
+	const datas = await Post
+		.aggregate([
+			{ $match: { user_id: user._id } },
+			{ $project: {
+				repost_id: '$repost_id',
+				reply_id: '$reply_id',
+				created_at: { $add: ['$created_at', 9 * 60 * 60 * 1000] } // Convert into JST
+			}},
+			{ $project: {
+				date: {
+					year: { $year: '$created_at' },
+					month: { $month: '$created_at' },
+					day: { $dayOfMonth: '$created_at' }
+				},
+				type: {
+					$cond: {
+						if: { $ne: ['$repost_id', null] },
+						then: 'repost',
+						else: {
+							$cond: {
+								if: { $ne: ['$reply_id', null] },
+								then: 'reply',
+								else: 'post'
+							}
+						}
+					}
+				}}
+			},
+			{ $group: { _id: {
+				date: '$date',
+				type: '$type'
+			}, count: { $sum: 1 } } },
+			{ $group: {
+				_id: '$_id.date',
+				data: { $addToSet: {
+					type: '$_id.type',
+					count: '$count'
+				}}
+			} }
+		]);
+
+	datas.forEach(data => {
+		data.date = data._id;
+		delete data._id;
+
+		data.posts = (data.data.filter(x => x.type == 'post')[0] || { count: 0 }).count;
+		data.reposts = (data.data.filter(x => x.type == 'repost')[0] || { count: 0 }).count;
+		data.replies = (data.data.filter(x => x.type == 'reply')[0] || { count: 0 }).count;
+
+		delete data.data;
+	});
+
+	const graph = [];
+
+	for (let i = 0; i < limit; i++) {
+		const day = new Date(new Date().setDate(new Date().getDate() - i));
+
+		const data = datas.filter(d =>
+			d.date.year == day.getFullYear() && d.date.month == day.getMonth() + 1 && d.date.day == day.getDate()
+		)[0];
+
+		if (data) {
+			graph.push(data);
+		} else {
+			graph.push({
+				date: {
+					year: day.getFullYear(),
+					month: day.getMonth() + 1, // In JavaScript, month is zero-based.
+					day: day.getDate()
+				},
+				posts: 0,
+				reposts: 0,
+				replies: 0
+			});
+		}
+	}
+
+	res(graph);
+});
diff --git a/src/server/api/endpoints/aggregation/users/followers.ts b/src/server/api/endpoints/aggregation/users/followers.ts
new file mode 100644
index 0000000000..3022b2b002
--- /dev/null
+++ b/src/server/api/endpoints/aggregation/users/followers.ts
@@ -0,0 +1,74 @@
+/**
+ * Module dependencies
+ */
+import $ from 'cafy';
+import User from '../../../models/user';
+import Following from '../../../models/following';
+
+/**
+ * Aggregate followers of a user
+ *
+ * @param {any} params
+ * @return {Promise<any>}
+ */
+module.exports = (params) => new Promise(async (res, rej) => {
+	// Get 'user_id' parameter
+	const [userId, userIdErr] = $(params.user_id).id().$;
+	if (userIdErr) return rej('invalid user_id param');
+
+	// Lookup user
+	const user = await User.findOne({
+		_id: userId
+	}, {
+		fields: {
+			_id: true
+		}
+	});
+
+	if (user === null) {
+		return rej('user not found');
+	}
+
+	const startTime = new Date(new Date().setMonth(new Date().getMonth() - 1));
+
+	const following = await Following
+		.find({
+			followee_id: user._id,
+			$or: [
+				{ deleted_at: { $exists: false } },
+				{ deleted_at: { $gt: startTime } }
+			]
+		}, {
+			_id: false,
+			follower_id: false,
+			followee_id: false
+		}, {
+			sort: { created_at: -1 }
+		});
+
+	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 = following.filter(f =>
+			f.created_at < day && (f.deleted_at == null || f.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);
+});
diff --git a/src/server/api/endpoints/aggregation/users/following.ts b/src/server/api/endpoints/aggregation/users/following.ts
new file mode 100644
index 0000000000..92da7e6921
--- /dev/null
+++ b/src/server/api/endpoints/aggregation/users/following.ts
@@ -0,0 +1,73 @@
+/**
+ * Module dependencies
+ */
+import $ from 'cafy';
+import User from '../../../models/user';
+import Following from '../../../models/following';
+
+/**
+ * Aggregate following of a user
+ *
+ * @param {any} params
+ * @return {Promise<any>}
+ */
+module.exports = (params) => new Promise(async (res, rej) => {
+	// Get 'user_id' parameter
+	const [userId, userIdErr] = $(params.user_id).id().$;
+	if (userIdErr) return rej('invalid user_id param');
+
+	// Lookup user
+	const user = await User.findOne({
+		_id: userId
+	}, {
+		fields: {
+			_id: true
+		}
+	});
+
+	if (user === null) {
+		return rej('user not found');
+	}
+
+	const startTime = new Date(new Date().setMonth(new Date().getMonth() - 1));
+
+	const following = await Following
+		.find({
+			follower_id: user._id,
+			$or: [
+				{ deleted_at: { $exists: false } },
+				{ deleted_at: { $gt: startTime } }
+			]
+		}, {
+			_id: false,
+			follower_id: false,
+			followee_id: false
+		}, {
+			sort: { created_at: -1 }
+		});
+
+	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));
+
+		const count = following.filter(f =>
+			f.created_at < day && (f.deleted_at == null || f.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);
+});
diff --git a/src/server/api/endpoints/aggregation/users/post.ts b/src/server/api/endpoints/aggregation/users/post.ts
new file mode 100644
index 0000000000..c6a75eee39
--- /dev/null
+++ b/src/server/api/endpoints/aggregation/users/post.ts
@@ -0,0 +1,110 @@
+/**
+ * Module dependencies
+ */
+import $ from 'cafy';
+import User from '../../../models/user';
+import Post from '../../../models/post';
+
+/**
+ * Aggregate post of a user
+ *
+ * @param {any} params
+ * @return {Promise<any>}
+ */
+module.exports = (params) => new Promise(async (res, rej) => {
+	// Get 'user_id' parameter
+	const [userId, userIdErr] = $(params.user_id).id().$;
+	if (userIdErr) return rej('invalid user_id param');
+
+	// Lookup user
+	const user = await User.findOne({
+		_id: userId
+	}, {
+		fields: {
+			_id: true
+		}
+	});
+
+	if (user === null) {
+		return rej('user not found');
+	}
+
+	const datas = await Post
+		.aggregate([
+			{ $match: { user_id: user._id } },
+			{ $project: {
+				repost_id: '$repost_id',
+				reply_id: '$reply_id',
+				created_at: { $add: ['$created_at', 9 * 60 * 60 * 1000] } // Convert into JST
+			}},
+			{ $project: {
+				date: {
+					year: { $year: '$created_at' },
+					month: { $month: '$created_at' },
+					day: { $dayOfMonth: '$created_at' }
+				},
+				type: {
+					$cond: {
+						if: { $ne: ['$repost_id', null] },
+						then: 'repost',
+						else: {
+							$cond: {
+								if: { $ne: ['$reply_id', null] },
+								then: 'reply',
+								else: 'post'
+							}
+						}
+					}
+				}}
+			},
+			{ $group: { _id: {
+				date: '$date',
+				type: '$type'
+			}, count: { $sum: 1 } } },
+			{ $group: {
+				_id: '$_id.date',
+				data: { $addToSet: {
+					type: '$_id.type',
+					count: '$count'
+				}}
+			} }
+		]);
+
+	datas.forEach(data => {
+		data.date = data._id;
+		delete data._id;
+
+		data.posts = (data.data.filter(x => x.type == 'post')[0] || { count: 0 }).count;
+		data.reposts = (data.data.filter(x => x.type == 'repost')[0] || { count: 0 }).count;
+		data.replies = (data.data.filter(x => x.type == 'reply')[0] || { count: 0 }).count;
+
+		delete data.data;
+	});
+
+	const graph = [];
+
+	for (let i = 0; i < 30; i++) {
+		const day = new Date(new Date().setDate(new Date().getDate() - i));
+
+		const data = datas.filter(d =>
+			d.date.year == day.getFullYear() && d.date.month == day.getMonth() + 1 && d.date.day == day.getDate()
+		)[0];
+
+		if (data) {
+			graph.push(data);
+		} else {
+			graph.push({
+				date: {
+					year: day.getFullYear(),
+					month: day.getMonth() + 1, // In JavaScript, month is zero-based.
+					day: day.getDate()
+				},
+				posts: 0,
+				reposts: 0,
+				replies: 0
+			});
+		}
+	}
+
+	res(graph);
+});
diff --git a/src/server/api/endpoints/aggregation/users/reaction.ts b/src/server/api/endpoints/aggregation/users/reaction.ts
new file mode 100644
index 0000000000..0a082ed1b7
--- /dev/null
+++ b/src/server/api/endpoints/aggregation/users/reaction.ts
@@ -0,0 +1,80 @@
+/**
+ * Module dependencies
+ */
+import $ from 'cafy';
+import User from '../../../models/user';
+import Reaction from '../../../models/post-reaction';
+
+/**
+ * Aggregate reaction of a user
+ *
+ * @param {any} params
+ * @return {Promise<any>}
+ */
+module.exports = (params) => new Promise(async (res, rej) => {
+	// Get 'user_id' parameter
+	const [userId, userIdErr] = $(params.user_id).id().$;
+	if (userIdErr) return rej('invalid user_id param');
+
+	// Lookup user
+	const user = await User.findOne({
+		_id: userId
+	}, {
+		fields: {
+			_id: true
+		}
+	});
+
+	if (user === null) {
+		return rej('user not found');
+	}
+
+	const datas = await Reaction
+		.aggregate([
+			{ $match: { user_id: user._id } },
+			{ $project: {
+				created_at: { $add: ['$created_at', 9 * 60 * 60 * 1000] } // Convert into JST
+			}},
+			{ $project: {
+				date: {
+					year: { $year: '$created_at' },
+					month: { $month: '$created_at' },
+					day: { $dayOfMonth: '$created_at' }
+				}
+			}},
+			{ $group: {
+				_id: '$date',
+				count: { $sum: 1 }
+			}}
+		]);
+
+	datas.forEach(data => {
+		data.date = data._id;
+		delete data._id;
+	});
+
+	const graph = [];
+
+	for (let i = 0; i < 30; i++) {
+		const day = new Date(new Date().setDate(new Date().getDate() - i));
+
+		const data = datas.filter(d =>
+			d.date.year == day.getFullYear() && d.date.month == day.getMonth() + 1 && d.date.day == day.getDate()
+		)[0];
+
+		if (data) {
+			graph.push(data);
+		} else {
+			graph.push({
+				date: {
+					year: day.getFullYear(),
+					month: day.getMonth() + 1, // In JavaScript, month is zero-based.
+					day: day.getDate()
+				},
+				count: 0
+			});
+		}
+	}
+
+	res(graph);
+});