#298

21 files changed, 313 insertions, 417 deletions

diff --git a/src/api/endpoints.ts b/src/api/endpoints.ts
index 17cd8ff56f..2d3716bb85 100644
--- a/src/api/endpoints.ts
+++ b/src/api/endpoints.ts
@@ -116,21 +116,12 @@ const endpoints: Endpoint[] = [
 		name: 'aggregation/users/post',
 	},
 	{
-		name: 'aggregation/users/like'
-	},
-	{
 		name: 'aggregation/users/followers'
 	},
 	{
 		name: 'aggregation/users/following'
 	},
 	{
-		name: 'aggregation/posts/like'
-	},
-	{
-		name: 'aggregation/posts/likes'
-	},
-	{
 		name: 'aggregation/posts/repost'
 	},
 	{
@@ -370,26 +361,26 @@ const endpoints: Endpoint[] = [
 		}
 	},
 	{
-		name: 'posts/likes',
+		name: 'posts/reactions',
 		withCredential: true
 	},
 	{
-		name: 'posts/likes/create',
+		name: 'posts/reactions/create',
 		withCredential: true,
 		limit: {
 			duration: ms('1hour'),
 			max: 100
 		},
-		kind: 'like-write'
+		kind: 'reaction-write'
 	},
 	{
-		name: 'posts/likes/delete',
+		name: 'posts/reactions/delete',
 		withCredential: true,
 		limit: {
 			duration: ms('1hour'),
 			max: 100
 		},
-		kind: 'like-write'
+		kind: 'reaction-write'
 	},
 	{
 		name: 'posts/favorites/create',
diff --git a/src/api/endpoints/posts/likes.ts b/src/api/endpoints/posts/reactions.ts
index 29aff1de38..eab5d9b258 100644
--- a/src/api/endpoints/posts/likes.ts
+++ b/src/api/endpoints/posts/reactions.ts
@@ -3,11 +3,11 @@
  */
 import $ from 'cafy';
 import Post from '../../models/post';
-import Like from '../../models/like';
-import serialize from '../../serializers/user';
+import Reaction from '../../models/post-reaction';
+import serialize from '../../serializers/post-reaction';
 
 /**
- * Show a likes of a post
+ * Show reactions of a post
  *
  * @param {any} params
  * @param {any} user
@@ -40,7 +40,7 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	}
 
 	// Issue query
-	const likes = await Like
+	const reactions = await Reaction
 		.find({
 			post_id: post._id,
 			deleted_at: { $exists: false }
@@ -53,6 +53,6 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 		});
 
 	// Serialize
-	res(await Promise.all(likes.map(async like =>
-		await serialize(like.user_id, user))));
+	res(await Promise.all(reactions.map(async reaction =>
+		await serialize(reaction, user))));
 });
diff --git a/src/api/endpoints/posts/likes/create.ts b/src/api/endpoints/posts/reactions/create.ts
index 3a7650dead..de4df5fbe1 100644
--- a/src/api/endpoints/posts/likes/create.ts
+++ b/src/api/endpoints/posts/reactions/create.ts
@@ -2,13 +2,12 @@
  * Module dependencies
  */
 import $ from 'cafy';
-import Like from '../../../models/like';
+import Reaction from '../../../models/post-reaction';
 import Post from '../../../models/post';
-import User from '../../../models/user';
 import notify from '../../../common/notify';
 
 /**
- * Like a post
+ * React to a post
  *
  * @param {any} params
  * @param {any} user
@@ -19,7 +18,18 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	const [postId, postIdErr] = $(params.post_id).id().$;
 	if (postIdErr) return rej('invalid post_id param');
 
-	// Get likee
+	// Get 'reaction' parameter
+	const [reaction, reactionErr] = $(params.reaction).string().or([
+		'like',
+		'love',
+		'laugh',
+		'hmm',
+		'surprise',
+		'congrats'
+	]).$;
+	if (reactionErr) return rej('invalid reaction param');
+
+	// Fetch reactee
 	const post = await Post.findOne({
 		_id: postId
 	});
@@ -30,53 +40,42 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 
 	// Myself
 	if (post.user_id.equals(user._id)) {
-		return rej('-need-translate-');
+		return rej('cannot react to my post');
 	}
 
-	// if already liked
-	const exist = await Like.findOne({
+	// if already reacted
+	const exist = await Reaction.findOne({
 		post_id: post._id,
 		user_id: user._id,
 		deleted_at: { $exists: false }
 	});
 
 	if (exist !== null) {
-		return rej('already liked');
+		return rej('already reacted');
 	}
 
-	// Create like
-	await Like.insert({
+	// Create reaction
+	await Reaction.insert({
 		created_at: new Date(),
 		post_id: post._id,
-		user_id: user._id
+		user_id: user._id,
+		reaction: reaction
 	});
 
 	// Send response
 	res();
 
-	// Increment likes count
-	Post.update({ _id: post._id }, {
-		$inc: {
-			likes_count: 1
-		}
-	});
-
-	// Increment user likes count
-	User.update({ _id: user._id }, {
-		$inc: {
-			likes_count: 1
-		}
-	});
+	const inc = {};
+	inc['reaction_counts.' + reaction] = 1;
 
-	// Increment user liked count
-	User.update({ _id: post.user_id }, {
-		$inc: {
-			liked_count: 1
-		}
+	// Increment reactions count
+	Post.update({ _id: post._id }, {
+		$inc: inc
 	});
 
 	// Notify
-	notify(post.user_id, user._id, 'like', {
-		post_id: post._id
+	notify(post.user_id, user._id, 'reaction', {
+		post_id: post._id,
+		reaction: reaction
 	});
 });
diff --git a/src/api/endpoints/posts/likes/delete.ts b/src/api/endpoints/posts/reactions/delete.ts
index d90f2937e0..89f6beb103 100644
--- a/src/api/endpoints/posts/likes/delete.ts
+++ b/src/api/endpoints/posts/reactions/delete.ts
@@ -2,13 +2,12 @@
  * Module dependencies
  */
 import $ from 'cafy';
-import Like from '../../../models/like';
+import Reaction from '../../../models/post-reaction';
 import Post from '../../../models/post';
-import User from '../../../models/user';
 // import event from '../../../event';
 
 /**
- * Unlike a post
+ * Unreact to a post
  *
  * @param {any} params
  * @param {any} user
@@ -19,7 +18,7 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 	const [postId, postIdErr] = $(params.post_id).id().$;
 	if (postIdErr) return rej('invalid post_id param');
 
-	// Get likee
+	// Fetch unreactee
 	const post = await Post.findOne({
 		_id: postId
 	});
@@ -28,47 +27,34 @@ module.exports = (params, user) => new Promise(async (res, rej) => {
 		return rej('post not found');
 	}
 
-	// if already liked
-	const exist = await Like.findOne({
+	// if already unreacted
+	const exist = await Reaction.findOne({
 		post_id: post._id,
 		user_id: user._id,
 		deleted_at: { $exists: false }
 	});
 
 	if (exist === null) {
-		return rej('already not liked');
+		return rej('never reacted');
 	}
 
-	// Delete like
-	await Like.update({
+	// Delete reaction
+	await Reaction.update({
 		_id: exist._id
 	}, {
-			$set: {
-				deleted_at: new Date()
-			}
-		});
+		$set: {
+			deleted_at: new Date()
+		}
+	});
 
 	// Send response
 	res();
 
-	// Decrement likes count
-	Post.update({ _id: post._id }, {
-		$inc: {
-			likes_count: -1
-		}
-	});
-
-	// Decrement user likes count
-	User.update({ _id: user._id }, {
-		$inc: {
-			likes_count: -1
-		}
-	});
+	const dec = {};
+	dec['reaction_counts.' + exist.reaction] = -1;
 
-	// Decrement user liked count
-	User.update({ _id: post.user_id }, {
-		$inc: {
-			liked_count: -1
-		}
+	// Decrement reactions count
+	Post.update({ _id: post._id }, {
+		$inc: dec
 	});
 });
diff --git a/src/api/models/like.ts b/src/api/models/like.ts
deleted file mode 100644
index ff04d8d0f7..0000000000
--- a/src/api/models/like.ts
+++ /dev/null
@@ -1,3 +0,0 @@
-import db from '../../db/mongodb';
-
-export default db.get('likes') as any; // fuck type definition
diff --git a/src/api/models/post-reaction.ts b/src/api/models/post-reaction.ts
new file mode 100644
index 0000000000..282ae5bd21
--- /dev/null
+++ b/src/api/models/post-reaction.ts
@@ -0,0 +1,3 @@
+import db from '../../db/mongodb';
+
+export default db.get('post_reactions') as any; // fuck type definition
diff --git a/src/api/serializers/notification.ts b/src/api/serializers/notification.ts
index 50952e5426..ac919dc8b0 100644
--- a/src/api/serializers/notification.ts
+++ b/src/api/serializers/notification.ts
@@ -51,7 +51,7 @@ export default (notification: any) => new Promise<any>(async (resolve, reject) =
 		case 'reply':
 		case 'repost':
 		case 'quote':
-		case 'like':
+		case 'reaction':
 		case 'poll_vote':
 			// Populate post
 			_notification.post = await serializePost(_notification.post_id, me);
diff --git a/src/api/serializers/post-reaction.ts b/src/api/serializers/post-reaction.ts
new file mode 100644
index 0000000000..b8807a741c
--- /dev/null
+++ b/src/api/serializers/post-reaction.ts
@@ -0,0 +1,43 @@
+/**
+ * Module dependencies
+ */
+import * as mongo from 'mongodb';
+import deepcopy = require('deepcopy');
+import Reaction from '../models/post-reaction';
+import serializeUser from './user';
+
+/**
+ * Serialize a reaction
+ *
+ * @param {any} reaction
+ * @param {any} me?
+ * @return {Promise<any>}
+ */
+export default (
+	reaction: any,
+	me?: any
+) => new Promise<any>(async (resolve, reject) => {
+	let _reaction: any;
+
+	// Populate the reaction if 'reaction' is ID
+	if (mongo.ObjectID.prototype.isPrototypeOf(reaction)) {
+		_reaction = await Reaction.findOne({
+			_id: reaction
+		});
+	} else if (typeof reaction === 'string') {
+		_reaction = await Reaction.findOne({
+			_id: new mongo.ObjectID(reaction)
+		});
+	} else {
+		_reaction = deepcopy(reaction);
+	}
+
+	// Rename _id to id
+	_reaction.id = _reaction._id;
+	delete _reaction._id;
+
+	// Populate user
+	_reaction.user = await serializeUser(_reaction.user_id, me);
+
+	resolve(_reaction);
+});
diff --git a/src/api/serializers/post.ts b/src/api/serializers/post.ts
index f459529697..3c96884dd1 100644
--- a/src/api/serializers/post.ts
+++ b/src/api/serializers/post.ts
@@ -4,7 +4,7 @@
 import * as mongo from 'mongodb';
 import deepcopy = require('deepcopy');
 import Post from '../models/post';
-import Like from '../models/like';
+import Reaction from '../models/post-reaction';
 import Vote from '../models/poll-vote';
 import serializeApp from './app';
 import serializeUser from './user';
@@ -100,18 +100,18 @@ const self = (
 		}
 	}
 
-	// Check if it is liked
+	// Fetch my reaction
 	if (me && opts.detail) {
-		const liked = await Like
-			.count({
+		const reaction = await Reaction
+			.findOne({
 				user_id: me._id,
 				post_id: id,
 				deleted_at: { $exists: false }
-			}, {
-				limit: 1
 			});
 
-		_post.is_liked = liked === 1;
+		if (reaction) {
+			_post.my_reaction = reaction.reaction;
+		}
 	}
 
 	resolve(_post);
diff --git a/src/web/app/common/tags/index.js b/src/web/app/common/tags/index.js
index 85b34ab363..567f2ffd78 100644
--- a/src/web/app/common/tags/index.js
+++ b/src/web/app/common/tags/index.js
@@ -26,3 +26,6 @@ require('./messaging/form.tag');
 require('./stream-indicator.tag');
 require('./public-timeline.tag');
 require('./activity-table.tag');
+require('./reaction-picker.tag');
+require('./reactions-viewer.tag');
+require('./reaction-icon.tag');
diff --git a/src/web/app/common/tags/reaction-icon.tag b/src/web/app/common/tags/reaction-icon.tag
new file mode 100644
index 0000000000..5cf357cbd4
--- /dev/null
+++ b/src/web/app/common/tags/reaction-icon.tag
@@ -0,0 +1,12 @@
+<mk-reaction-icon>
+	<virtual if={ opts.reaction == 'like' }>👍</virtual>
+	<virtual if={ opts.reaction == 'love' }>❤️</virtual>
+	<virtual if={ opts.reaction == 'laugh' }>😆</virtual>
+	<virtual if={ opts.reaction == 'hmm' }>🤔</virtual>
+	<virtual if={ opts.reaction == 'surprise' }>😮</virtual>
+	<virtual if={ opts.reaction == 'congrats' }>🎉</virtual>
+	<style>
+		:scope
+			display inline
+	</style>
+</mk-reaction-icon>
diff --git a/src/web/app/common/tags/reaction-picker.tag b/src/web/app/common/tags/reaction-picker.tag
new file mode 100644
index 0000000000..ed2beb0d2a
--- /dev/null
+++ b/src/web/app/common/tags/reaction-picker.tag
@@ -0,0 +1,58 @@
+<mk-reaction-picker>
+	<div class="backdrop" onclick={ unmount }></div>
+	<div class="popover" ref="popover">
+		<button onclick={ react.bind(null, 'like') } tabindex="1" title="いいね"><mk-reaction-icon reaction='like'></mk-reaction-icon></button>
+		<button onclick={ react.bind(null, 'love') } tabindex="2" title="ハート"><mk-reaction-icon reaction='love'></mk-reaction-icon></button>
+		<button onclick={ react.bind(null, 'laugh') } tabindex="3" title="笑"><mk-reaction-icon reaction='laugh'></mk-reaction-icon></button>
+		<button onclick={ react.bind(null, 'hmm') } tabindex="4" title="ふぅ～む"><mk-reaction-icon reaction='hmm'></mk-reaction-icon></button>
+		<button onclick={ react.bind(null, 'surprise') } tabindex="5" title="驚き"><mk-reaction-icon reaction='surprise'></mk-reaction-icon></button>
+		<button onclick={ react.bind(null, 'congrats') } tabindex="6" title="おめでとう"><mk-reaction-icon reaction='congrats'></mk-reaction-icon></button>
+	</div>
+	<style>
+		:scope
+			display block
+			position initial
+
+			> .backdrop
+				position fixed
+				top 0
+				left 0
+				z-index 10000
+				width 100%
+				height 100%
+				background rgba(0, 0, 0, 0.1)
+
+			> .popover
+				position absolute
+				z-index 10001
+				background #fff
+				border 1px solid rgba(27, 31, 35, 0.15)
+				border-radius 4px
+				box-shadow 0 3px 12px rgba(27, 31, 35, 0.15)
+
+				> button
+					font-size 24px
+
+	</style>
+	<script>
+		this.mixin('api');
+
+		this.post = this.opts.post;
+
+		this.on('mount', () => {
+			const width = this.refs.popover.offsetWidth;
+			this.refs.popover.style.top = this.opts.top + 'px';
+			this.refs.popover.style.left = (this.opts.left - (width / 2)) + 'px';
+		});
+
+		this.react = reaction => {
+			this.api('posts/reactions/create', {
+				post_id: this.post.id,
+				reaction: reaction
+			}).then(() => {
+				if (this.opts.cb) this.opts.cb();
+				this.unmount();
+			});
+		};
+	</script>
+</mk-reaction-picker>
diff --git a/src/web/app/common/tags/reactions-viewer.tag b/src/web/app/common/tags/reactions-viewer.tag
new file mode 100644
index 0000000000..b289d89e85
--- /dev/null
+++ b/src/web/app/common/tags/reactions-viewer.tag
@@ -0,0 +1,29 @@
+<mk-reactions-viewer>
+	<virtual if={ reactions }>
+		<span if={ reactions.like }><mk-reaction-icon reaction='like'></mk-reaction-icon><span>{ reactions.like }</span></span>
+		<span if={ reactions.love }><mk-reaction-icon reaction='love'></mk-reaction-icon><span>{ reactions.love }</span></span>
+		<span if={ reactions.laugh }><mk-reaction-icon reaction='laugh'></mk-reaction-icon><span>{ reactions.laugh }</span></span>
+		<span if={ reactions.hmm }><mk-reaction-icon reaction='hmm'></mk-reaction-icon><span>{ reactions.hmm }</span></span>
+		<span if={ reactions.surprise }><mk-reaction-icon reaction='surprise'></mk-reaction-icon><span>{ reactions.surprise }</span></span>
+		<span if={ reactions.congrats }><mk-reaction-icon reaction='congrats'></mk-reaction-icon><span>{ reactions.congrats }</span></span>
+	</virtual>
+	<style>
+		:scope
+			display block
+
+			> span
+				margin-right 8px
+
+				> mk-reaction-icon
+					font-size 20px
+
+				> span
+					margin-left 4px
+					font-size 16px
+					color #444
+
+	</style>
+	<script>
+		this.reactions = this.opts.post.reaction_counts;
+	</script>
+</mk-reactions-viewer>
diff --git a/src/web/app/desktop/tags/notifications.tag b/src/web/app/desktop/tags/notifications.tag
index d459b7f31a..2a038b5e08 100644
--- a/src/web/app/desktop/tags/notifications.tag
+++ b/src/web/app/desktop/tags/notifications.tag
@@ -3,44 +3,58 @@
 		<virtual each={ notification, i in notifications }>
 			<div class="notification { notification.type }">
 				<mk-time time={ notification.created_at }></mk-time>
-				<virtual if={ notification.type == 'like' }>
-					<a class="avatar-anchor" href={ CONFIG.url + '/' + notification.user.username } data-user-preview={ notification.user.id }><img class="avatar" src={ notification.user.avatar_url + '?thumbnail&size=48' } alt="avatar"/></a>
+				<virtual if={ notification.type == 'reaction' }>
+					<a class="avatar-anchor" href={ CONFIG.url + '/' + notification.user.username } data-user-preview={ notification.user.id }>
+						<img class="avatar" src={ notification.user.avatar_url + '?thumbnail&size=48' } alt="avatar"/>
+					</a>
 					<div class="text">
-						<p><i class="fa fa-thumbs-o-up"></i><a href={ CONFIG.url + '/' + notification.user.username } data-user-preview={ notification.user.id }>{ notification.user.name }</a></p><a class="post-ref" href={ CONFIG.url + '/' + notification.post.user.username + '/' + notification.post.id }>{ getPostSummary(notification.post) }</a>
+						<p><mk-reaction-icon reaction={ notification.reaction }></mk-reaction-icon><a href={ CONFIG.url + '/' + notification.user.username } data-user-preview={ notification.user.id }>{ notification.user.name }</a></p><a class="post-ref" href={ CONFIG.url + '/' + notification.post.user.username + '/' + notification.post.id }>{ getPostSummary(notification.post) }</a>
 					</div>
 				</virtual>
 				<virtual if={ notification.type == 'repost' }>
-					<a class="avatar-anchor" href={ CONFIG.url + '/' + notification.post.user.username } data-user-preview={ notification.post.user_id }><img class="avatar" src={ notification.post.user.avatar_url + '?thumbnail&size=48' } alt="avatar"/></a>
+					<a class="avatar-anchor" href={ CONFIG.url + '/' + notification.post.user.username } data-user-preview={ notification.post.user_id }>
+						<img class="avatar" src={ notification.post.user.avatar_url + '?thumbnail&size=48' } alt="avatar"/>
+					</a>
 					<div class="text">
 						<p><i class="fa fa-retweet"></i><a href={ CONFIG.url + '/' + notification.post.user.username } data-user-preview={ notification.post.user_id }>{ notification.post.user.name }</a></p><a class="post-ref" href={ CONFIG.url + '/' + notification.post.user.username + '/' + notification.post.id }>{ getPostSummary(notification.post.repost) }</a>
 					</div>
 				</virtual>
 				<virtual if={ notification.type == 'quote' }>
-					<a class="avatar-anchor" href={ CONFIG.url + '/' + notification.post.user.username } data-user-preview={ notification.post.user_id }><img class="avatar" src={ notification.post.user.avatar_url + '?thumbnail&size=48' } alt="avatar"/></a>
+					<a class="avatar-anchor" href={ CONFIG.url + '/' + notification.post.user.username } data-user-preview={ notification.post.user_id }>
+						<img class="avatar" src={ notification.post.user.avatar_url + '?thumbnail&size=48' } alt="avatar"/>
+					</a>
 					<div class="text">
 						<p><i class="fa fa-quote-left"></i><a href={ CONFIG.url + '/' + notification.post.user.username } data-user-preview={ notification.post.user_id }>{ notification.post.user.name }</a></p><a class="post-preview" href={ CONFIG.url + '/' + notification.post.user.username + '/' + notification.post.id }>{ getPostSummary(notification.post) }</a>
 					</div>
 				</virtual>
 				<virtual if={ notification.type == 'follow' }>
-					<a class="avatar-anchor" href={ CONFIG.url + '/' + notification.user.username } data-user-preview={ notification.user.id }><img class="avatar" src={ notification.user.avatar_url + '?thumbnail&size=48' } alt="avatar"/></a>
+					<a class="avatar-anchor" href={ CONFIG.url + '/' + notification.user.username } data-user-preview={ notification.user.id }>
+						<img class="avatar" src={ notification.user.avatar_url + '?thumbnail&size=48' } alt="avatar"/>
+					</a>
 					<div class="text">
 						<p><i class="fa fa-user-plus"></i><a href={ CONFIG.url + '/' + notification.user.username } data-user-preview={ notification.user.id }>{ notification.user.name }</a></p>
 					</div>
 				</virtual>
 				<virtual if={ notification.type == 'reply' }>
-					<a class="avatar-anchor" href={ CONFIG.url + '/' + notification.post.user.username } data-user-preview={ notification.post.user_id }><img class="avatar" src={ notification.post.user.avatar_url + '?thumbnail&size=48' } alt="avatar"/></a>
+					<a class="avatar-anchor" href={ CONFIG.url + '/' + notification.post.user.username } data-user-preview={ notification.post.user_id }>
+						<img class="avatar" src={ notification.post.user.avatar_url + '?thumbnail&size=48' } alt="avatar"/>
+					</a>
 					<div class="text">
 						<p><i class="fa fa-reply"></i><a href={ CONFIG.url + '/' + notification.post.user.username } data-user-preview={ notification.post.user_id }>{ notification.post.user.name }</a></p><a class="post-preview" href={ CONFIG.url + '/' + notification.post.user.username + '/' + notification.post.id }>{ getPostSummary(notification.post) }</a>
 					</div>
 				</virtual>
 				<virtual if={ notification.type == 'mention' }>
-					<a class="avatar-anchor" href={ CONFIG.url + '/' + notification.post.user.username } data-user-preview={ notification.post.user_id }><img class="avatar" src={ notification.post.user.avatar_url + '?thumbnail&size=48' } alt="avatar"/></a>
+					<a class="avatar-anchor" href={ CONFIG.url + '/' + notification.post.user.username } data-user-preview={ notification.post.user_id }>
+						<img class="avatar" src={ notification.post.user.avatar_url + '?thumbnail&size=48' } alt="avatar"/>
+					</a>
 					<div class="text">
 						<p><i class="fa fa-at"></i><a href={ CONFIG.url + '/' + notification.post.user.username } data-user-preview={ notification.post.user_id }>{ notification.post.user.name }</a></p><a class="post-preview" href={ CONFIG.url + '/' + notification.post.user.username + '/' + notification.post.id }>{ getPostSummary(notification.post) }</a>
 					</div>
 				</virtual>
 				<virtual if={ notification.type == 'poll_vote' }>
-					<a class="avatar-anchor" href={ CONFIG.url + '/' + notification.user.username } data-user-preview={ notification.user.id }><img class="avatar" src={ notification.user.avatar_url + '?thumbnail&size=48' } alt="avatar"/></a>
+					<a class="avatar-anchor" href={ CONFIG.url + '/' + notification.user.username } data-user-preview={ notification.user.id }>
+						<img class="avatar" src={ notification.user.avatar_url + '?thumbnail&size=48' } alt="avatar"/>
+					</a>
 					<div class="text">
 						<p><i class="fa fa-pie-chart"></i><a href={ CONFIG.url + '/' + notification.user.username } data-user-preview={ notification.user.id }>{ notification.user.name }</a></p><a class="post-ref" href={ CONFIG.url + '/' + notification.post.user.username + '/' + notification.post.id }>{ getPostSummary(notification.post) }</a>
 					</div>
@@ -105,7 +119,7 @@
 						p
 							margin 0
 
-							i
+							i, mk-reaction-icon
 								margin-right 4px
 
 					.post-preview
@@ -128,10 +142,6 @@
 						&:after
 							content "\f10e"
 
-					&.like
-						.text p i
-							color #FFAC33
-
 					&.repost, &.quote
 						.text p i
 							color #77B255
diff --git a/src/web/app/desktop/tags/post-detail.tag b/src/web/app/desktop/tags/post-detail.tag
index 0495c5c6ec..b1bec9f7ef 100644
--- a/src/web/app/desktop/tags/post-detail.tag
+++ b/src/web/app/desktop/tags/post-detail.tag
@@ -45,42 +45,18 @@
 				<mk-poll if={ p.poll } post={ p }></mk-poll>
 			</div>
 			<footer>
+				<mk-reactions-viewer post={ p }></mk-reactions-viewer>
 				<button onclick={ reply } title="返信"><i class="fa fa-reply"></i>
 					<p class="count" if={ p.replies_count > 0 }>{ p.replies_count }</p>
 				</button>
 				<button onclick={ repost } title="Repost"><i class="fa fa-retweet"></i>
 					<p class="count" if={ p.repost_count > 0 }>{ p.repost_count }</p>
 				</button>
-				<button class={ liked: p.is_liked } onclick={ like } title="善哉"><i class="fa fa-thumbs-o-up"></i>
-					<p class="count" if={ p.likes_count > 0 }>{ p.likes_count }</p>
+				<button class={ reacted: p.my_reaction != null } onclick={ react } ref="reactButton" title="リアクション"><i class="fa fa-plus"></i>
+					<p class="count" if={ p.reactions_count > 0 }>{ p.reactions_count }</p>
 				</button>
-				<button onclick={ NotImplementedException }><i class="fa fa-ellipsis-h"></i></button>
+				<button><i class="fa fa-ellipsis-h"></i></button>
 			</footer>
-			<div class="reposts-and-likes">
-				<div class="reposts" if={ reposts && reposts.length > 0 }>
-					<header>
-						<a>{ p.repost_count }</a>
-						<p>Repost</p>
-					</header>
-					<ol class="users">
-						<li class="user" each={ reposts }>
-							<a class="avatar-anchor" href={ CONFIG.url + '/' + user.username } title={ user.name } data-user-preview={ user.id }>
-							<img class="avatar" src={ user.avatar_url + '?thumbnail&size=32' } alt=""/></a>
-						</li>
-					</ol>
-				</div>
-				<div class="likes" if={ likes && likes.length > 0 }>
-					<header><a>{ p.likes_count }</a>
-						<p>いいね</p>
-					</header>
-					<ol class="users">
-						<li class="user" each={ likes }>
-							<a class="avatar-anchor" href={ CONFIG.url + '/' + username } title={ name } data-user-preview={ id }>
-							<img class="avatar" src={ avatar_url + '?thumbnail&size=32' } alt=""/></a>
-						</li>
-					</ol>
-				</div>
-			</div>
 		</article>
 		<div class="replies">
 			<virtual each={ post in replies }>
@@ -271,68 +247,9 @@
 								margin 0 0 0 8px
 								color #999
 
-							&.liked
+							&.reacted
 								color $theme-color
 
-					> .reposts-and-likes
-						display flex
-						justify-content center
-						padding 0
-						margin 16px 0
-
-						&:empty
-							display none
-
-						> .reposts
-						> .likes
-							display flex
-							flex 1 1
-							padding 0
-							border-top solid 1px #F2EFEE
-
-							> header
-								flex 1 1 80px
-								max-width 80px
-								padding 8px 5px 0px 10px
-
-								> a
-									display block
-									font-size 1.5em
-									line-height 1.4em
-
-								> p
-									display block
-									margin 0
-									font-size 0.7em
-									line-height 1em
-									font-weight normal
-									color #a0a2a5
-
-							> .users
-								display block
-								flex 1 1
-								margin 0
-								padding 10px 10px 10px 5px
-								list-style none
-
-								> .user
-									display block
-									float left
-									margin 4px
-									padding 0
-
-									> .avatar-anchor
-										display:block
-
-										> .avatar
-											vertical-align bottom
-											width 24px
-											height 24px
-											border-radius 4px
-
-						> .reposts + .likes
-							margin-left 16px
-
 				> .replies
 					> *
 						border-top 1px solid #eef0f2
@@ -356,6 +273,8 @@
 			}).then(post => {
 				const isRepost = post.repost != null;
 				const p = isRepost ? post.repost : post;
+				p.reactions_count = p.reaction_counts ? Object.keys(p.reaction_counts).map(key => p.reaction_counts[key]).reduce((a, b) => a + b) : 0;
+
 				this.update({
 					fetching: false,
 					post: post,
@@ -385,26 +304,6 @@
 					});
 				}
 
-				// Get likes
-				this.api('posts/likes', {
-					post_id: this.p.id,
-					limit: 8
-				}).then(likes => {
-					this.update({
-						likes: likes
-					});
-				});
-
-				// Get reposts
-				this.api('posts/reposts', {
-					post_id: this.p.id,
-					limit: 8
-				}).then(reposts => {
-					this.update({
-						reposts: reposts
-					});
-				});
-
 				// Get replies
 				this.api('posts/replies', {
 					post_id: this.p.id,
@@ -429,22 +328,13 @@
 			});
 		};
 
-		this.like = () => {
-			if (this.p.is_liked) {
-				this.api('posts/likes/delete', {
-					post_id: this.p.id
-				}).then(() => {
-					this.p.is_liked = false;
-					this.update();
-				});
-			} else {
-				this.api('posts/likes/create', {
-					post_id: this.p.id
-				}).then(() => {
-					this.p.is_liked = true;
-					this.update();
-				});
-			}
+		this.react = () => {
+			const rect = this.refs.reactButton.getBoundingClientRect();
+			riot.mount(document.body.appendChild(document.createElement('mk-reaction-picker')), {
+				top: rect.top + window.pageYOffset,
+				left: rect.left + window.pageXOffset,
+				post: this.p
+			});
 		};
 
 		this.loadContext = () => {
diff --git a/src/web/app/desktop/tags/timeline-post.tag b/src/web/app/desktop/tags/timeline-post.tag
index 0559aaf6a0..ccd5f25703 100644
--- a/src/web/app/desktop/tags/timeline-post.tag
+++ b/src/web/app/desktop/tags/timeline-post.tag
@@ -46,14 +46,15 @@
 				</div>
 			</div>
 			<footer>
+				<mk-reactions-viewer post={ p }></mk-reactions-viewer>
 				<button onclick={ reply } title="返信"><i class="fa fa-reply"></i>
 					<p class="count" if={ p.replies_count > 0 }>{ p.replies_count }</p>
 				</button>
 				<button onclick={ repost } title="Repost"><i class="fa fa-retweet"></i>
 					<p class="count" if={ p.repost_count > 0 }>{ p.repost_count }</p>
 				</button>
-				<button class={ liked: p.is_liked } onclick={ like } title="善哉"><i class="fa fa-thumbs-o-up"></i>
-					<p class="count" if={ p.likes_count > 0 }>{ p.likes_count }</p>
+				<button class={ reacted: p.my_reaction != null } onclick={ react } ref="reactButton" title="リアクション"><i class="fa fa-plus"></i>
+					<p class="count" if={ p.reactions_count > 0 }>{ p.reactions_count }</p>
 				</button>
 				<button>
 					<i class="fa fa-ellipsis-h"></i>
@@ -313,7 +314,7 @@
 								margin 0 0 0 8px
 								color #999
 
-							&.liked
+							&.reacted
 								color $theme-color
 
 							&:last-child
@@ -333,14 +334,14 @@
 		this.mixin('api');
 		this.mixin('user-preview');
 
+		this.isDetailOpened = false;
+
 		this.post = this.opts.post;
 		this.isRepost = this.post.repost && this.post.text == null && this.post.media_ids == null && this.post.poll == null;
 		this.p = this.isRepost ? this.post.repost : this.post;
-
+		this.p.reactions_count = this.p.reaction_counts ? Object.keys(this.p.reaction_counts).map(key => this.p.reaction_counts[key]).reduce((a, b) => a + b) : 0;
 		this.title = dateStringify(this.p.created_at);
-
 		this.url = `/${this.p.user.username}/${this.p.id}`;
-		this.isDetailOpened = false;
 
 		this.on('mount', () => {
 			if (this.p.text) {
@@ -375,22 +376,13 @@
 			});
 		};
 
-		this.like = () => {
-			if (this.p.is_liked) {
-				this.api('posts/likes/delete', {
-					post_id: this.p.id
-				}).then(() => {
-					this.p.is_liked = false;
-					this.update();
-				});
-			} else {
-				this.api('posts/likes/create', {
-					post_id: this.p.id
-				}).then(() => {
-					this.p.is_liked = true;
-					this.update();
-				});
-			}
+		this.react = () => {
+			const rect = this.refs.reactButton.getBoundingClientRect();
+			riot.mount(document.body.appendChild(document.createElement('mk-reaction-picker')), {
+				top: rect.top + window.pageYOffset,
+				left: rect.left + window.pageXOffset,
+				post: this.p
+			});
 		};
 
 		this.toggleDetail = () => {
diff --git a/src/web/app/dev/tags/new-app-form.tag b/src/web/app/dev/tags/new-app-form.tag
index e01be512fb..0a8b5cd258 100644
--- a/src/web/app/dev/tags/new-app-form.tag
+++ b/src/web/app/dev/tags/new-app-form.tag
@@ -47,8 +47,8 @@
 					<p>投稿する。</p>
 				</label>
 				<label>
-					<input type="checkbox" value="like-write"/>
-					<p>いいねしたりいいね解除する。</p>
+					<input type="checkbox" value="reaction-write"/>
+					<p>リアクションしたりリアクションをキャンセルする。</p>
 				</label>
 				<label>
 					<input type="checkbox" value="following-write"/>
diff --git a/src/web/app/mobile/tags/notification-preview.tag b/src/web/app/mobile/tags/notification-preview.tag
index e20307ebc5..9edbf9a562 100644
--- a/src/web/app/mobile/tags/notification-preview.tag
+++ b/src/web/app/mobile/tags/notification-preview.tag
@@ -1,40 +1,47 @@
 <mk-notification-preview class={ notification.type }>
-	<virtual if={ notification.type == 'like' }><img class="avatar" src={ notification.user.avatar_url + '?thumbnail&size=64' } alt="avatar"/>
+	<virtual if={ notification.type == 'reaction' }>
+		<img class="avatar" src={ notification.user.avatar_url + '?thumbnail&size=64' } alt="avatar"/>
 		<div class="text">
-			<p><i class="fa fa-thumbs-o-up"></i>{ notification.user.name }</p>
+			<p><mk-reaction-icon reaction={ notification.reaction }></mk-reaction-icon>{ notification.user.name }</p>
 			<p class="post-ref">{ getPostSummary(notification.post) }</p>
 		</div>
 	</virtual>
-	<virtual if={ notification.type == 'repost' }><img class="avatar" src={ notification.post.user.avatar_url + '?thumbnail&size=64' } alt="avatar"/>
+	<virtual if={ notification.type == 'repost' }>
+		<img class="avatar" src={ notification.post.user.avatar_url + '?thumbnail&size=64' } alt="avatar"/>
 		<div class="text">
 			<p><i class="fa fa-retweet"></i>{ notification.post.user.name }</p>
 			<p class="post-ref">{ getPostSummary(notification.post.repost) }</p>
 		</div>
 	</virtual>
-	<virtual if={ notification.type == 'quote' }><img class="avatar" src={ notification.post.user.avatar_url + '?thumbnail&size=64' } alt="avatar"/>
+	<virtual if={ notification.type == 'quote' }>
+		<img class="avatar" src={ notification.post.user.avatar_url + '?thumbnail&size=64' } alt="avatar"/>
 		<div class="text">
 			<p><i class="fa fa-quote-left"></i>{ notification.post.user.name }</p>
 			<p class="post-preview">{ getPostSummary(notification.post) }</p>
 		</div>
 	</virtual>
-	<virtual if={ notification.type == 'follow' }><img class="avatar" src={ notification.user.avatar_url + '?thumbnail&size=64' } alt="avatar"/>
+	<virtual if={ notification.type == 'follow' }>
+		<img class="avatar" src={ notification.user.avatar_url + '?thumbnail&size=64' } alt="avatar"/>
 		<div class="text">
 			<p><i class="fa fa-user-plus"></i>{ notification.user.name }</p>
 		</div>
 	</virtual>
-	<virtual if={ notification.type == 'reply' }><img class="avatar" src={ notification.post.user.avatar_url + '?thumbnail&size=64' } alt="avatar"/>
+	<virtual if={ notification.type == 'reply' }>
+		<img class="avatar" src={ notification.post.user.avatar_url + '?thumbnail&size=64' } alt="avatar"/>
 		<div class="text">
 			<p><i class="fa fa-reply"></i>{ notification.post.user.name }</p>
 			<p class="post-preview">{ getPostSummary(notification.post) }</p>
 		</div>
 	</virtual>
-	<virtual if={ notification.type == 'mention' }><img class="avatar" src={ notification.post.user.avatar_url + '?thumbnail&size=64' } alt="avatar"/>
+	<virtual if={ notification.type == 'mention' }>
+		<img class="avatar" src={ notification.post.user.avatar_url + '?thumbnail&size=64' } alt="avatar"/>
 		<div class="text">
 			<p><i class="fa fa-at"></i>{ notification.post.user.name }</p>
 			<p class="post-preview">{ getPostSummary(notification.post) }</p>
 		</div>
 	</virtual>
-	<virtual if={ notification.type == 'poll_vote' }><img class="avatar" src={ notification.user.avatar_url + '?thumbnail&size=64' } alt="avatar"/>
+	<virtual if={ notification.type == 'poll_vote' }>
+		<img class="avatar" src={ notification.user.avatar_url + '?thumbnail&size=64' } alt="avatar"/>
 		<div class="text">
 			<p><i class="fa fa-pie-chart"></i>{ notification.user.name }</p>
 			<p class="post-ref">{ getPostSummary(notification.post) }</p>
@@ -70,7 +77,7 @@
 				p
 					margin 0
 
-					i
+					i, mk-reaction-icon
 						margin-right 4px
 
 			.post-ref
@@ -89,10 +96,6 @@
 				&:after
 					content "\f10e"
 
-			&.like
-				.text p i
-					color #FFAC33
-
 			&.repost, &.quote
 				.text p i
 					color #77B255
diff --git a/src/web/app/mobile/tags/notification.tag b/src/web/app/mobile/tags/notification.tag
index 591638858d..fcdc05dcb5 100644
--- a/src/web/app/mobile/tags/notification.tag
+++ b/src/web/app/mobile/tags/notification.tag
@@ -1,12 +1,12 @@
 <mk-notification class={ notification.type }>
 	<mk-time time={ notification.created_at }></mk-time>
-	<virtual if={ notification.type == 'like' }>
+	<virtual if={ notification.type == 'reaction' }>
 		<a class="avatar-anchor" href={ CONFIG.url + '/' + notification.user.username }>
 			<img class="avatar" src={ notification.user.avatar_url + '?thumbnail&size=64' } alt="avatar"/>
 		</a>
 		<div class="text">
 			<p>
-				<i class="fa fa-thumbs-o-up"></i>
+				<mk-reaction-icon reaction={ notification.reaction }></mk-reaction-icon>
 				<a href={ CONFIG.url + '/' + notification.user.username }>{ notification.user.name }</a>
 			</p>
 			<a class="post-ref" href={ CONFIG.url + '/' + notification.post.user.username + '/' + notification.post.id }>{ getPostSummary(notification.post) }</a>
@@ -123,7 +123,7 @@
 				p
 					margin 0
 
-					i
+					i, mk-reaction-icon
 						margin-right 4px
 
 			.post-preview
@@ -146,10 +146,6 @@
 				&:after
 					content "\f10e"
 
-			&.like
-				.text p i
-					color #FFAC33
-
 			&.repost, &.quote
 				.text p i
 					color #77B255
diff --git a/src/web/app/mobile/tags/post-detail.tag b/src/web/app/mobile/tags/post-detail.tag
index 4fc16bcb38..5dfbd0ce64 100644
--- a/src/web/app/mobile/tags/post-detail.tag
+++ b/src/web/app/mobile/tags/post-detail.tag
@@ -46,41 +46,18 @@
 				<mk-time time={ p.created_at } mode="detail"></mk-time>
 			</a>
 			<footer>
+				<mk-reactions-viewer post={ p }></mk-reactions-viewer>
 				<button onclick={ reply } title="返信"><i class="fa fa-reply"></i>
 					<p class="count" if={ p.replies_count > 0 }>{ p.replies_count }</p>
 				</button>
 				<button onclick={ repost } title="Repost"><i class="fa fa-retweet"></i>
 					<p class="count" if={ p.repost_count > 0 }>{ p.repost_count }</p>
 				</button>
-				<button class={ liked: p.is_liked } onclick={ like } title="善哉"><i class="fa fa-thumbs-o-up"></i>
-					<p class="count" if={ p.likes_count > 0 }>{ p.likes_count }</p>
+				<button class={ reacted: p.my_reaction != null } onclick={ react } ref="reactButton" title="リアクション"><i class="fa fa-plus"></i>
+					<p class="count" if={ p.reactions_count > 0 }>{ p.reactions_count }</p>
 				</button>
-				<button onclick={ NotImplementedException }><i class="fa fa-ellipsis-h"></i></button>
+				<button><i class="fa fa-ellipsis-h"></i></button>
 			</footer>
-			<div class="reposts-and-likes">
-				<div class="reposts" if={ reposts && reposts.length > 0 }>
-					<header><a>{ p.repost_count }</a>
-						<p>Repost</p>
-					</header>
-					<ol class="users">
-						<li class="user" each={ reposts }>
-							<a class="avatar-anchor" href={ CONFIG.url + '/' + user.username } title={ user.name }>
-							<img class="avatar" src={ user.avatar_url + '?thumbnail&size=32' } alt=""/></a>
-						</li>
-					</ol>
-				</div>
-				<div class="likes" if={ likes && likes.length > 0 }>
-					<header><a>{ p.likes_count }</a>
-						<p>いいね</p>
-					</header>
-					<ol class="users">
-						<li class="user" each={ likes }>
-							<a class="avatar-anchor" href={ CONFIG.url + '/' + username } title={ name }>
-							<img class="avatar" src={ avatar_url + '?thumbnail&size=32' } alt=""/></a>
-						</li>
-					</ol>
-				</div>
-			</div>
 		</article>
 		<div class="replies">
 			<virtual each={ post in replies }>
@@ -273,68 +250,9 @@
 								margin 0 0 0 8px
 								color #999
 
-							&.liked
+							&.reacted
 								color $theme-color
 
-					> .reposts-and-likes
-						display flex
-						justify-content center
-						padding 0
-						margin 16px 0
-
-						&:empty
-							display none
-
-						> .reposts
-						> .likes
-							display flex
-							flex 1 1
-							padding 0
-							border-top solid 1px #F2EFEE
-
-							> header
-								flex 1 1 80px
-								max-width 80px
-								padding 8px 5px 0px 10px
-
-								> a
-									display block
-									font-size 1.5em
-									line-height 1.4em
-
-								> p
-									display block
-									margin 0
-									font-size 0.7em
-									line-height 1em
-									font-weight normal
-									color #a0a2a5
-
-							> .users
-								display block
-								flex 1 1
-								margin 0
-								padding 10px 10px 10px 5px
-								list-style none
-
-								> .user
-									display block
-									float left
-									margin 4px
-									padding 0
-
-									> .avatar-anchor
-										display:block
-
-										> .avatar
-											vertical-align bottom
-											width 24px
-											height 24px
-											border-radius 4px
-
-						> .reposts + .likes
-							margin-left 16px
-
 				> .replies
 					> *
 						border-top 1px solid #eef0f2
@@ -358,6 +276,8 @@
 			}).then(post => {
 				const isRepost = post.repost != null;
 				const p = isRepost ? post.repost : post;
+				p.reactions_count = p.reaction_counts ? Object.keys(p.reaction_counts).map(key => p.reaction_counts[key]).reduce((a, b) => a + b) : 0;
+
 				this.update({
 					fetching: false,
 					post: post,
@@ -387,26 +307,6 @@
 					});
 				}
 
-				// Get likes
-				this.api('posts/likes', {
-					post_id: this.p.id,
-					limit: 8
-				}).then(likes => {
-					this.update({
-						likes: likes
-					});
-				});
-
-				// Get reposts
-				this.api('posts/reposts', {
-					post_id: this.p.id,
-					limit: 8
-				}).then(reposts => {
-					this.update({
-						reposts: reposts
-					});
-				});
-
 				// Get replies
 				this.api('posts/replies', {
 					post_id: this.p.id,
@@ -434,22 +334,13 @@
 			});
 		};
 
-		this.like = () => {
-			if (this.p.is_liked) {
-				this.api('posts/likes/delete', {
-					post_id: this.p.id
-				}).then(() => {
-					this.p.is_liked = false;
-					this.update();
-				});
-			} else {
-				this.api('posts/likes/create', {
-					post_id: this.p.id
-				}).then(() => {
-					this.p.is_liked = true;
-					this.update();
-				});
-			}
+		this.react = () => {
+			const rect = this.refs.reactButton.getBoundingClientRect();
+			riot.mount(document.body.appendChild(document.createElement('mk-reaction-picker')), {
+				top: rect.top + window.pageYOffset,
+				left: rect.left + window.pageXOffset,
+				post: this.p
+			});
 		};
 
 		this.loadContext = () => {
diff --git a/src/web/app/mobile/tags/timeline-post.tag b/src/web/app/mobile/tags/timeline-post.tag
index c861130b66..9f861961a9 100644
--- a/src/web/app/mobile/tags/timeline-post.tag
+++ b/src/web/app/mobile/tags/timeline-post.tag
@@ -43,14 +43,15 @@
 				</div>
 			</div>
 			<footer>
+				<mk-reactions-viewer post={ p }></mk-reactions-viewer>
 				<button onclick={ reply }><i class="fa fa-reply"></i>
 					<p class="count" if={ p.replies_count > 0 }>{ p.replies_count }</p>
 				</button>
 				<button onclick={ repost } title="Repost"><i class="fa fa-retweet"></i>
 					<p class="count" if={ p.repost_count > 0 }>{ p.repost_count }</p>
 				</button>
-				<button class={ liked: p.is_liked } onclick={ like }><i class="fa fa-thumbs-o-up"></i>
-					<p class="count" if={ p.likes_count > 0 }>{ p.likes_count }</p>
+				<button class={ reacted: p.my_reaction != null } onclick={ react } ref="reactButton"><i class="fa fa-plus"></i>
+					<p class="count" if={ p.reactions_count > 0 }>{ p.reactions_count }</p>
 				</button>
 			</footer>
 		</div>
@@ -300,7 +301,7 @@
 								margin 0 0 0 8px
 								color #999
 
-							&.liked
+							&.reacted
 								color $theme-color
 
 	</style>
@@ -314,6 +315,7 @@
 		this.post = this.opts.post;
 		this.isRepost = this.post.repost != null && this.post.text == null;
 		this.p = this.isRepost ? this.post.repost : this.post;
+		this.p.reactions_count = this.p.reaction_counts ? Object.keys(this.p.reaction_counts).map(key => this.p.reaction_counts[key]).reduce((a, b) => a + b) : 0;
 		this.summary = getPostSummary(this.p);
 		this.url = `/${this.p.user.username}/${this.p.id}`;
 
@@ -353,22 +355,13 @@
 			});
 		};
 
-		this.like = () => {
-			if (this.p.is_liked) {
-				this.api('posts/likes/delete', {
-					post_id: this.p.id
-				}).then(() => {
-					this.p.is_liked = false;
-					this.update();
-				});
-			} else {
-				this.api('posts/likes/create', {
-					post_id: this.p.id
-				}).then(() => {
-					this.p.is_liked = true;
-					this.update();
-				});
-			}
+		this.react = () => {
+			const rect = this.refs.reactButton.getBoundingClientRect();
+			riot.mount(document.body.appendChild(document.createElement('mk-reaction-picker')), {
+				top: rect.top + window.pageYOffset,
+				left: rect.left + window.pageXOffset,
+				post: this.p
+			});
 		};
 	</script>
 </mk-timeline-post>