From d47d16e23520da29b4e731812a712db05d4697ca Mon Sep 17 00:00:00 2001
From: Kavin <20838718+FireMasterK@users.noreply.github.com>
Date: Fri, 8 Apr 2022 22:29:50 +0100
Subject: [PATCH] Implement play with playlists.

---
 src/components/PlaylistPage.vue   |  6 +++-
 src/components/PlaylistVideos.vue | 57 +++++++++++++++++++++++++++++++
 src/components/VideoItem.vue      | 21 ++++++++++--
 src/components/VideoPlayer.vue    | 24 ++++++++++++-
 src/components/VideoRedirect.vue  |  2 +-
 src/components/WatchVideo.vue     | 48 ++++++++++++++++++++++++++
 6 files changed, 153 insertions(+), 5 deletions(-)
 create mode 100644 src/components/PlaylistVideos.vue

diff --git a/src/components/PlaylistPage.vue b/src/components/PlaylistPage.vue
index 8c854bfb..d2f97513 100644
--- a/src/components/PlaylistPage.vue
+++ b/src/components/PlaylistPage.vue
@@ -75,6 +75,7 @@ export default {
     },
     activated() {
         window.addEventListener("scroll", this.handleScroll);
+        if (this.playlist) this.updateTitle();
     },
     deactivated() {
         window.removeEventListener("scroll", this.handleScroll);
@@ -86,7 +87,10 @@ export default {
         async getPlaylistData() {
             this.fetchPlaylist()
                 .then(data => (this.playlist = data))
-                .then(() => (document.title = this.playlist.name + " - Piped"));
+                .then(() => this.updateTitle());
+        },
+        async updateTitle() {
+            document.title = this.playlist.name + " - Piped";
         },
         handleScroll() {
             if (this.loading || !this.playlist || !this.playlist.nextpage) return;
diff --git a/src/components/PlaylistVideos.vue b/src/components/PlaylistVideos.vue
new file mode 100644
index 00000000..c8374e4d
--- /dev/null
+++ b/src/components/PlaylistVideos.vue
@@ -0,0 +1,57 @@
+<template>
+    <div class="overflow-x-scroll h-screen-sm" ref="scrollable">
+        <VideoItem
+            v-for="(related, index) in playlist.relatedStreams"
+            :key="related.url"
+            :video="related"
+            :index="index"
+            :playlist-id="playlistId"
+            height="94"
+            width="168"
+        />
+    </div>
+</template>
+
+<script>
+import { nextTick } from "vue";
+import VideoItem from "./VideoItem.vue";
+export default {
+    components: { VideoItem },
+    props: {
+        playlist: {
+            type: Object,
+            required: true,
+        },
+        playlistId: {
+            type: String,
+            required: true,
+        },
+        selectedIndex: {
+            type: Number,
+        },
+    },
+    mounted() {
+        this.updateScroll();
+    },
+    methods: {
+        updateScroll() {
+            const elems = Array.from(this.$refs.scrollable.children).filter(elm => elm.matches("div"));
+            const index = this.selectedIndex - 1;
+            if (index < elems.length)
+                this.$refs.scrollable.scrollTop =
+                    elems[this.selectedIndex - 1].offsetTop - this.$refs.scrollable.offsetTop;
+        },
+    },
+    watch: {
+        playlist: {
+            handler() {
+                if (this.selectedIndex - 1 < this.playlist.relatedStreams.length)
+                    nextTick(() => {
+                        this.updateScroll();
+                    });
+            },
+            deep: true,
+        },
+    },
+};
+</script>
diff --git a/src/components/VideoItem.vue b/src/components/VideoItem.vue
index 37f7a26c..56e8b499 100644
--- a/src/components/VideoItem.vue
+++ b/src/components/VideoItem.vue
@@ -1,6 +1,15 @@
 <template>
     <div>
-        <router-link :to="video.url">
+        <router-link
+            :to="{
+                path: '/watch',
+                query: {
+                    v: video.url.substr(-11),
+                    ...(playlistId && { list: playlistId }),
+                    ...(index >= 0 && { index: index + 1 }),
+                },
+            }"
+        >
             <img :height="height" :width="width" class="w-full" :src="video.thumbnail" alt="" loading="lazy" />
             <div class="relative text-sm">
                 <span
@@ -26,7 +35,15 @@
 
         <div class="float-right m-0 inline-block children:px-1">
             <router-link
-                :to="video.url + '&listen=1'"
+                :to="{
+                    path: '/watch',
+                    query: {
+                        v: video.url.substr(-11),
+                        ...(playlistId && { list: playlistId }),
+                        ...(index >= 0 && { index: index + 1 }),
+                        listen: '1',
+                    },
+                }"
                 :aria-label="'Listen to ' + video.title"
                 :title="'Listen to ' + video.title"
             >
diff --git a/src/components/VideoPlayer.vue b/src/components/VideoPlayer.vue
index 37d569d7..f863cac0 100644
--- a/src/components/VideoPlayer.vue
+++ b/src/components/VideoPlayer.vue
@@ -24,6 +24,14 @@ export default {
                 return {};
             },
         },
+        playlist: {
+            type: Object,
+            default: null,
+        },
+        index: {
+            type: Number,
+            default: -1,
+        },
         sponsors: {
             type: Object,
             default: () => {
@@ -38,6 +46,7 @@ export default {
         return {
             lastUpdate: new Date().getTime(),
             initialSeekComplete: false,
+            destroying: false,
         };
     },
     computed: {
@@ -171,9 +180,11 @@ export default {
         });
     },
     deactivated() {
+        this.destroying = true;
         this.destroy(true);
     },
     unmounted() {
+        this.destroying = true;
         this.destroy(true);
     },
     methods: {
@@ -281,6 +292,7 @@ export default {
 
             if (noPrevPlayer)
                 this.shakaPromise.then(() => {
+                    if (this.destroying) return;
                     this.shaka.polyfill.installAll();
 
                     const localPlayer = new this.shaka.Player(videoEl);
@@ -355,13 +367,23 @@ export default {
                 videoEl.addEventListener("ended", () => {
                     if (!this.selectedAutoLoop && this.selectedAutoPlay && this.video.relatedStreams.length > 0) {
                         const params = this.$route.query;
-                        let url = this.video.relatedStreams[0].url;
+                        let url = this.playlist?.relatedStreams?.[this.index]?.url ?? this.video.relatedStreams[0].url;
                         const searchParams = new URLSearchParams();
                         for (var param in params)
                             switch (param) {
                                 case "v":
                                 case "t":
                                     break;
+                                case "index":
+                                    if (this.index < this.playlist.relatedStreams.length)
+                                        searchParams.set("index", this.index + 1);
+                                    break;
+                                case "list":
+                                    console.log(this.index);
+                                    console.log(this.playlist.relatedStreams.length);
+                                    if (this.index < this.playlist.relatedStreams.length)
+                                        searchParams.set("list", params.list);
+                                    break;
                                 default:
                                     searchParams.set(param, params[param]);
                                     break;
diff --git a/src/components/VideoRedirect.vue b/src/components/VideoRedirect.vue
index 38cc5fbe..91763534 100644
--- a/src/components/VideoRedirect.vue
+++ b/src/components/VideoRedirect.vue
@@ -7,7 +7,7 @@ export default {
     activated() {
         const videoId = this.$route.params.videoId;
         if (videoId)
-            this.$router.push({
+            this.$router.replace({
                 path: "/watch",
                 query: { v: videoId },
             });
diff --git a/src/components/WatchVideo.vue b/src/components/WatchVideo.vue
index 01f55bf8..b2470d17 100644
--- a/src/components/WatchVideo.vue
+++ b/src/components/WatchVideo.vue
@@ -4,6 +4,8 @@
             ref="videoPlayer"
             :video="video"
             :sponsors="sponsors"
+            :playlist="playlist"
+            :index="index"
             :selected-auto-play="false"
             :selected-auto-loop="selectedAutoLoop"
             :is-embed="isEmbed"
@@ -18,6 +20,8 @@
                 ref="videoPlayer"
                 :video="video"
                 :sponsors="sponsors"
+                :playlist="playlist"
+                :index="index"
                 :selected-auto-play="selectedAutoPlay"
                 :selected-auto-loop="selectedAutoLoop"
             />
@@ -128,6 +132,12 @@
             </div>
 
             <div v-if="video" class="order-first sm:order-last">
+                <PlaylistVideos
+                    v-if="playlist"
+                    :playlist-id="playlistId"
+                    :playlist="playlist"
+                    :selected-index="index"
+                />
                 <a
                     class="btn mb-2 sm:hidden"
                     @click="showRecs = !showRecs"
@@ -156,6 +166,7 @@ import ErrorHandler from "./ErrorHandler.vue";
 import CommentItem from "./CommentItem.vue";
 import Chapters from "./Chapters.vue";
 import PlaylistAddModal from "./PlaylistAddModal.vue";
+import PlaylistVideos from "./PlaylistVideos.vue";
 
 export default {
     name: "App",
@@ -166,6 +177,7 @@ export default {
         CommentItem,
         Chapters,
         PlaylistAddModal,
+        PlaylistVideos,
     },
     data() {
         const smallViewQuery = window.matchMedia("(max-width: 640px)");
@@ -173,6 +185,9 @@ export default {
             video: {
                 title: "Loading...",
             },
+            playlistId: null,
+            playlist: null,
+            index: null,
             sponsors: null,
             selectedAutoLoop: false,
             selectedAutoPlay: null,
@@ -237,6 +252,9 @@ export default {
             })();
             if (this.active) this.$refs.videoPlayer.loadVideo();
         });
+        this.playlistId = this.$route.query.list;
+        this.index = Number(this.$route.query.index);
+        this.getPlaylistData();
         this.getSponsors();
         if (!this.isEmbed && this.getPreferenceBoolean("comments", true)) this.getComments();
         window.addEventListener("resize", () => {
@@ -307,6 +325,36 @@ export default {
                     }
                 });
         },
+        async getPlaylistData() {
+            if (this.playlistId) {
+                await this.fetchJson(this.apiUrl() + "/playlists/" + this.playlistId).then(data => {
+                    this.playlist = data;
+                });
+                await this.fetchPlaylistPages().then(() => {
+                    if (!(this.index >= 0)) {
+                        for (let i = 0; i < this.playlist.relatedStreams.length; i++)
+                            if (this.playlist.relatedStreams[i].url.substr(-11) == this.getVideoId()) {
+                                this.index = i + 1;
+                                this.$router.replace({
+                                    query: { ...this.$route.query, index: this.index },
+                                });
+                                break;
+                            }
+                    }
+                });
+            }
+        },
+        async fetchPlaylistPages() {
+            if (this.playlist.nextpage) {
+                await this.fetchJson(this.apiUrl() + "/nextpage/playlists/" + this.playlistId, {
+                    nextpage: this.playlist.nextpage,
+                }).then(json => {
+                    this.playlist.relatedStreams = this.playlist.relatedStreams.concat(json.relatedStreams);
+                    this.playlist.nextpage = json.nextpage;
+                });
+                await this.fetchPlaylistPages();
+            }
+        },
         async getSponsors() {
             if (this.getPreferenceBoolean("sponsorblock", true))
                 this.fetchSponsors().then(data => (this.sponsors = data));