From bc8a0083e262c724ef4d803a4f2a9f076377341c Mon Sep 17 00:00:00 2001
From: syuilo <syuilotan@yahoo.co.jp>
Date: Thu, 26 Apr 2018 11:46:42 +0900
Subject: [PATCH] wip

---
 package.json                                  |   1 +
 .../app/mobile/views/components/notes.vue     | 147 +++++++++++++++++-
 .../app/mobile/views/components/timeline.vue  | 117 +++-----------
 .../mobile/views/components/user-timeline.vue |  55 ++++---
 src/server/index.ts                           |   6 +
 5 files changed, 197 insertions(+), 129 deletions(-)

diff --git a/package.json b/package.json
index 7d0adc3cb6..d37bbc040d 100644
--- a/package.json
+++ b/package.json
@@ -144,6 +144,7 @@
 		"koa-multer": "1.0.2",
 		"koa-router": "7.4.0",
 		"koa-send": "4.1.3",
+		"koa-slow": "^2.1.0",
 		"kue": "0.11.6",
 		"license-checker": "18.0.0",
 		"loader-utils": "1.1.0",
diff --git a/src/client/app/mobile/views/components/notes.vue b/src/client/app/mobile/views/components/notes.vue
index 999ab566ac..137e15c6de 100644
--- a/src/client/app/mobile/views/components/notes.vue
+++ b/src/client/app/mobile/views/components/notes.vue
@@ -1,7 +1,20 @@
 <template>
 <div class="mk-notes">
+	<div class="newer-indicator" :style="{ top: $store.state.uiHeaderHeight + 'px' }" v-show="queue.length > 0"></div>
+
 	<slot name="head"></slot>
-	<slot></slot>
+
+	<slot name="empty" v-if="notes.length == 0 && !fetching && requestInitPromise == null"></slot>
+
+	<div class="init" v-if="fetching">
+		%fa:spinner .pulse%%i18n:common.loading%
+	</div>
+
+	<div v-if="!fetching && requestInitPromise != null">
+		<p>読み込みに失敗しました。</p>
+		<button @click="resolveInitPromise">リトライ</button>
+	</div>
+
 	<transition-group name="mk-notes" class="transition">
 		<template v-for="(note, i) in _notes">
 			<mk-note :note="note" :key="note.id" @update:note="onNoteUpdated(i, $event)"/>
@@ -11,8 +24,12 @@
 			</p>
 		</template>
 	</transition-group>
-	<footer>
-		<slot name="tail"></slot>
+
+	<footer v-if="more">
+		<button @click="loadMore" :disabled="moreFetching" :style="{ cursor: moreFetching ? 'wait' : 'pointer' }">
+			<template v-if="!moreFetching">%i18n:@load-more%</template>
+			<template v-if="moreFetching">%fa:spinner .pulse .fw%</template>
+		</button>
 	</footer>
 </div>
 </template>
@@ -20,13 +37,26 @@
 <script lang="ts">
 import Vue from 'vue';
 
+const displayLimit = 30;
+
 export default Vue.extend({
 	props: {
-		notes: {
-			type: Array,
-			default: () => []
+		more: {
+			type: Function,
+			required: false
 		}
 	},
+
+	data() {
+		return {
+			requestInitPromise: null as () => Promise<any[]>,
+			notes: [],
+			queue: [],
+			fetching: true,
+			moreFetching: false
+		};
+	},
+
 	computed: {
 		_notes(): any[] {
 			return (this.notes as any).map(note => {
@@ -38,9 +68,107 @@ export default Vue.extend({
 			});
 		}
 	},
+
+	mounted() {
+		window.addEventListener('scroll', this.onScroll);
+	},
+
+	beforeDestroy() {
+		window.removeEventListener('scroll', this.onScroll);
+	},
+
 	methods: {
+		isScrollTop() {
+			return window.scrollY <= 8;
+		},
+
 		onNoteUpdated(i, note) {
 			Vue.set((this as any).notes, i, note);
+		},
+
+		init(promiseGenerator: () => Promise<any[]>) {
+			this.requestInitPromise = promiseGenerator;
+			this.resolveInitPromise();
+		},
+
+		resolveInitPromise() {
+			this.queue = [];
+			this.notes = [];
+			this.fetching = true;
+
+			const promise = this.requestInitPromise();
+
+			promise.then(notes => {
+				this.notes = notes;
+				this.requestInitPromise = null;
+				this.fetching = false;
+			}, e => {
+				this.fetching = false;
+			});
+		},
+
+		prepend(note, silent = false) {
+			//#region 弾く
+			const isMyNote = note.userId == (this as any).os.i.id;
+			const isPureRenote = note.renoteId != null && note.text == null && note.mediaIds.length == 0 && note.poll == null;
+
+			if ((this as any).os.i.clientSettings.showMyRenotes === false) {
+				if (isMyNote && isPureRenote) {
+					return;
+				}
+			}
+
+			if ((this as any).os.i.clientSettings.showRenotedMyNotes === false) {
+				if (isPureRenote && (note.renote.userId == (this as any).os.i.id)) {
+					return;
+				}
+			}
+			//#endregion
+
+			if (this.isScrollTop()) {
+				// Prepend the note
+				this.notes.unshift(note);
+
+				// オーバーフローしたら古い投稿は捨てる
+				if (this.notes.length >= displayLimit) {
+					this.notes = this.notes.slice(0, displayLimit);
+				}
+			} else {
+				this.queue.unshift(note);
+			}
+		},
+
+		append(note) {
+			this.notes.push(note);
+		},
+
+		tail() {
+			return this.notes[this.notes.length - 1];
+		},
+
+		releaseQueue() {
+			this.queue.forEach(n => this.prepend(n, true));
+			this.queue = [];
+		},
+
+		async loadMore() {
+			if (this.more == null) return;
+			if (this.moreFetching) return;
+
+			this.moreFetching = true;
+			await this.more();
+			this.moreFetching = false;
+		},
+
+		onScroll() {
+			if (this.isScrollTop()) {
+				this.releaseQueue();
+			}
+
+			if ((this as any).os.i.clientSettings.fetchOnScroll !== false) {
+				const current = window.scrollY + window.innerHeight;
+				if (current > document.body.offsetHeight - 8) this.loadMore();
+			}
 		}
 	}
 });
@@ -79,6 +207,13 @@ export default Vue.extend({
 			[data-fa]
 				margin-right 8px
 
+	> .newer-indicator
+		position -webkit-sticky
+		position sticky
+		z-index 100
+		height 3px
+		background $theme-color
+
 	> .init
 		padding 64px 0
 		text-align center
diff --git a/src/client/app/mobile/views/components/timeline.vue b/src/client/app/mobile/views/components/timeline.vue
index f56667bed5..561034917e 100644
--- a/src/client/app/mobile/views/components/timeline.vue
+++ b/src/client/app/mobile/views/components/timeline.vue
@@ -1,19 +1,12 @@
 <template>
 <div class="mk-timeline">
-	<div class="newer-indicator" :style="{ top: $store.state.uiHeaderHeight + 'px' }" v-show="queue.length > 0"></div>
 	<mk-friends-maker v-if="alone"/>
-	<mk-notes :notes="notes">
-		<div class="init" v-if="fetching">
-			%fa:spinner .pulse%%i18n:common.loading%
-		</div>
-		<div class="empty" v-if="!fetching && notes.length == 0">
+
+	<mk-notes ref="timeline" :more="existMore ? more : null">
+		<div slot="empty">
 			%fa:R comments%
 			%i18n:@empty%
 		</div>
-		<button v-if="canFetchMore" @click="more" :disabled="moreFetching" slot="tail">
-			<span v-if="!moreFetching">%i18n:@load-more%</span>
-			<span v-if="moreFetching">%i18n:common.loading%<mk-ellipsis/></span>
-		</button>
 	</mk-notes>
 </div>
 </template>
@@ -22,7 +15,6 @@
 import Vue from 'vue';
 
 const fetchLimit = 10;
-const displayLimit = 30;
 
 export default Vue.extend({
 	props: {
@@ -37,8 +29,6 @@ export default Vue.extend({
 		return {
 			fetching: true,
 			moreFetching: false,
-			notes: [],
-			queue: [],
 			existMore: false,
 			connection: null,
 			connectionId: null
@@ -48,10 +38,6 @@ export default Vue.extend({
 	computed: {
 		alone(): boolean {
 			return (this as any).os.i.followingCount == 0;
-		},
-
-		canFetchMore(): boolean {
-			return !this.moreFetching && !this.fetching && this.notes.length > 0 && this.existMore;
 		}
 	},
 
@@ -63,8 +49,6 @@ export default Vue.extend({
 		this.connection.on('follow', this.onChangeFollowing);
 		this.connection.on('unfollow', this.onChangeFollowing);
 
-		window.addEventListener('scroll', this.onScroll);
-
 		this.fetch();
 	},
 
@@ -73,102 +57,54 @@ export default Vue.extend({
 		this.connection.off('follow', this.onChangeFollowing);
 		this.connection.off('unfollow', this.onChangeFollowing);
 		(this as any).os.stream.dispose(this.connectionId);
-
-		window.removeEventListener('scroll', this.onScroll);
 	},
 
 	methods: {
-		isScrollTop() {
-			return window.scrollY <= 8;
-		},
-
 		fetch(cb?) {
-			this.queue = [];
 			this.fetching = true;
-			(this as any).api('notes/timeline', {
-				limit: fetchLimit + 1,
-				untilDate: this.date ? (this.date as any).getTime() : undefined,
-				includeMyRenotes: (this as any).os.i.clientSettings.showMyRenotes,
-				includeRenotedMyNotes: (this as any).os.i.clientSettings.showRenotedMyNotes
-			}).then(notes => {
-				if (notes.length == fetchLimit + 1) {
-					notes.pop();
-					this.existMore = true;
-				}
-				this.notes = notes;
-				this.fetching = false;
-				this.$emit('loaded');
-				if (cb) cb();
-			});
+			(this.$refs.timeline as any).init(() => new Promise((res, rej) => {
+				(this as any).api('notes/timeline', {
+					limit: fetchLimit + 1,
+					includeMyRenotes: (this as any).os.i.clientSettings.showMyRenotes,
+					includeRenotedMyNotes: (this as any).os.i.clientSettings.showRenotedMyNotes
+				}).then(notes => {
+					if (notes.length == fetchLimit + 1) {
+						notes.pop();
+						this.existMore = true;
+					}
+					res(notes);
+					this.fetching = false;
+					this.$emit('loaded');
+					if (cb) cb();
+				}, rej);
+			}));
 		},
 
 		more() {
 			this.moreFetching = true;
 			(this as any).api('notes/timeline', {
 				limit: fetchLimit + 1,
-				untilId: this.notes[this.notes.length - 1].id,
+				untilId: (this.$refs.timeline as any).tail().id,
 				includeMyRenotes: (this as any).os.i.clientSettings.showMyRenotes,
 				includeRenotedMyNotes: (this as any).os.i.clientSettings.showRenotedMyNotes
 			}).then(notes => {
 				if (notes.length == fetchLimit + 1) {
 					notes.pop();
-					this.existMore = true;
 				} else {
 					this.existMore = false;
 				}
-				this.notes = this.notes.concat(notes);
+				notes.forEach(n => (this.$refs.timeline as any).append(n));
 				this.moreFetching = false;
 			});
 		},
 
-		prependNote(note) {
-			// Prepent a note
-			this.notes.unshift(note);
-
-			// オーバーフローしたら古い投稿は捨てる
-			if (this.notes.length >= displayLimit) {
-				this.notes = this.notes.slice(0, displayLimit);
-			}
-		},
-
-		releaseQueue() {
-			this.queue.forEach(n => this.prependNote(n));
-			this.queue = [];
-		},
-
 		onNote(note) {
-			//#region 弾く
-			const isMyNote = note.userId == (this as any).os.i.id;
-			const isPureRenote = note.renoteId != null && note.text == null && note.mediaIds.length == 0 && note.poll == null;
-
-			if ((this as any).os.i.clientSettings.showMyRenotes === false) {
-				if (isMyNote && isPureRenote) {
-					return;
-				}
-			}
-
-			if ((this as any).os.i.clientSettings.showRenotedMyNotes === false) {
-				if (isPureRenote && (note.renote.userId == (this as any).os.i.id)) {
-					return;
-				}
-			}
-			//#endregion
-
-			if (this.isScrollTop()) {
-				this.prependNote(note);
-			} else {
-				this.queue.unshift(note);
-			}
+			// Prepend a note
+			(this.$refs.timeline as any).prepend(note);
 		},
 
 		onChangeFollowing() {
 			this.fetch();
-		},
-
-		onScroll() {
-			if (this.isScrollTop()) {
-				this.releaseQueue();
-			}
 		}
 	}
 });
@@ -178,13 +114,6 @@ export default Vue.extend({
 @import '~const.styl'
 
 .mk-timeline
-	> .newer-indicator
-		position -webkit-sticky
-		position sticky
-		z-index 100
-		height 3px
-		background $theme-color
-
 	> .mk-friends-maker
 		margin-bottom 8px
 </style>
diff --git a/src/client/app/mobile/views/components/user-timeline.vue b/src/client/app/mobile/views/components/user-timeline.vue
index 40b3be035e..89ac4d2c66 100644
--- a/src/client/app/mobile/views/components/user-timeline.vue
+++ b/src/client/app/mobile/views/components/user-timeline.vue
@@ -1,17 +1,10 @@
 <template>
 <div class="mk-user-timeline">
-	<mk-notes :notes="notes">
-		<div class="init" v-if="fetching">
-			%fa:spinner .pulse%%i18n:common.loading%
-		</div>
-		<div class="empty" v-if="!fetching && notes.length == 0">
+	<mk-notes ref="timeline" :more="existMore ? more : null">
+		<div slot="empty">
 			%fa:R comments%
 			{{ withMedia ? '%i18n:!@no-notes-with-media%' : '%i18n:!@no-notes%' }}
 		</div>
-		<button v-if="!fetching && existMore" @click="more" :disabled="moreFetching" slot="tail">
-			<span v-if="!moreFetching">%i18n:@load-more%</span>
-			<span v-if="moreFetching">%i18n:common.loading%<mk-ellipsis/></span>
-		</button>
 	</mk-notes>
 </div>
 </template>
@@ -19,49 +12,53 @@
 <script lang="ts">
 import Vue from 'vue';
 
-const limit = 10;
+const fetchLimit = 10;
 
 export default Vue.extend({
 	props: ['user', 'withMedia'],
 	data() {
 		return {
 			fetching: true,
-			notes: [],
 			existMore: false,
 			moreFetching: false
 		};
 	},
 	mounted() {
-		(this as any).api('users/notes', {
-			userId: this.user.id,
-			withMedia: this.withMedia,
-			limit: limit + 1
-		}).then(notes => {
-			if (notes.length == limit + 1) {
-				notes.pop();
-				this.existMore = true;
-			}
-			this.notes = notes;
-			this.fetching = false;
-			this.$emit('loaded');
-		});
+		this.fetch();
 	},
 	methods: {
+		fetch() {
+			this.fetching = true;
+			(this.$refs.timeline as any).init(() => new Promise((res, rej) => {
+				(this as any).api('users/notes', {
+					userId: this.user.id,
+					withMedia: this.withMedia,
+					limit: fetchLimit + 1
+				}).then(notes => {
+					if (notes.length == fetchLimit + 1) {
+						notes.pop();
+						this.existMore = true;
+					}
+					res(notes);
+					this.fetching = false;
+					this.$emit('loaded');
+				}, rej);
+			}));
+		},
 		more() {
 			this.moreFetching = true;
 			(this as any).api('users/notes', {
 				userId: this.user.id,
 				withMedia: this.withMedia,
-				limit: limit + 1,
-				untilId: this.notes[this.notes.length - 1].id
+				limit: fetchLimit + 1,
+				untilId: (this.$refs.timeline as any).tail().id
 			}).then(notes => {
-				if (notes.length == limit + 1) {
+				if (notes.length == fetchLimit + 1) {
 					notes.pop();
-					this.existMore = true;
 				} else {
 					this.existMore = false;
 				}
-				this.notes = this.notes.concat(notes);
+				notes.forEach(n => (this.$refs.timeline as any).append(n));
 				this.moreFetching = false;
 			});
 		}
diff --git a/src/server/index.ts b/src/server/index.ts
index 2b5a910507..594f40c22f 100644
--- a/src/server/index.ts
+++ b/src/server/index.ts
@@ -11,6 +11,7 @@ import * as Router from 'koa-router';
 import * as mount from 'koa-mount';
 import * as compress from 'koa-compress';
 import * as logger from 'koa-logger';
+const slow = require('koa-slow');
 
 import activityPub from './activitypub';
 import webFinger from './webfinger';
@@ -23,6 +24,11 @@ app.proxy = true;
 if (process.env.NODE_ENV != 'production') {
 	// Logger
 	app.use(logger());
+
+	// Delay
+	app.use(slow({
+		delay: 1000
+	}));
 }
 
 // Compress response