From 80837a12c2490f5860a65cea4bd60c9584ea51ef Mon Sep 17 00:00:00 2001
From: nklhrstv <me@nikolahristov.com>
Date: Sun, 5 Apr 2020 20:42:53 +0300
Subject: [PATCH] deep linking module implemented

---
 src/common/deepLinking.js | 88 +++++++++++++++++++++++++++++++++++++++
 src/common/index.js       |  2 +
 2 files changed, 90 insertions(+)
 create mode 100644 src/common/deepLinking.js

diff --git a/src/common/deepLinking.js b/src/common/deepLinking.js
new file mode 100644
index 000000000..c68e7fb9f
--- /dev/null
+++ b/src/common/deepLinking.js
@@ -0,0 +1,88 @@
+const pako = require('pako');
+
+const serializeStream = (stream) => {
+    return btoa(pako.deflate(JSON.stringify(stream), { to: 'string' }));
+};
+
+const deserializeStream = (stream) => {
+    return JSON.parse(pako.inflate(atob(stream), { to: 'string' }));
+};
+
+const withMetaItem = ({ metaItem }) => {
+    return {
+        meta_details_videos: `#/metadetails/${encodeURIComponent(metaItem.type)}/${encodeURIComponent(metaItem.id)}`,
+        meta_details_streams: typeof metaItem.behaviorHints.defaultVideoId === 'string' ?
+            `#/metadetails/${encodeURIComponent(metaItem.type)}/${encodeURIComponent(metaItem.id)}/${encodeURIComponent(metaItem.behaviorHints.defaultVideoId)}`
+            :
+            null
+    };
+};
+
+const withLibItem = ({ libItem, streams = {} }) => {
+    const videoId = typeof libItem.state.video_id === 'string' ?
+        libItem.state.video_id
+        :
+        typeof libItem.behaviorHints.defaultVideoId === 'string' ?
+            libItem.behaviorHints.defaultVideoId
+            :
+            null;
+    const [stream, streamTransportUrl, metaTransportUrl] = typeof videoId === 'string' && typeof streams[`${encodeURIComponent(libItem._id)}/${encodeURIComponent(videoId)}`] === 'object' ?
+        streams[`${encodeURIComponent(libItem._id)}/${encodeURIComponent(videoId)}`]
+        :
+        [];
+    return {
+        videos: `#/metadetails/${encodeURIComponent(libItem.type)}/${encodeURIComponent(libItem._id)}`,
+        streams: typeof videoId === 'string' ?
+            `#/metadetails/${encodeURIComponent(libItem.type)}/${encodeURIComponent(libItem._id)}/${encodeURIComponent(videoId)}`
+            :
+            null,
+        // TODO check if stream is external
+        player: typeof videoId === 'string' && typeof stream === 'object' && typeof streamTransportUrl === 'string' && typeof metaTransportUrl === 'string' ?
+            `#/player/${serializeStream(stream)}/${encodeURIComponent(streamTransportUrl)}/${encodeURIComponent(metaTransportUrl)}/${encodeURIComponent(libItem.type)}/${encodeURIComponent(libItem._id)}/${encodeURIComponent(videoId)}`
+            :
+            null
+    };
+};
+
+const withVideo = ({ metaItem, video, metaTransportUrl, streams = {} }) => {
+    const [stream, streamTransportUrl] = typeof streams[`${encodeURIComponent(metaItem.id)}/${encodeURIComponent(video.id)}`] === 'object' ?
+        streams[`${encodeURIComponent(metaItem.id)}/${encodeURIComponent(video.id)}`]
+        :
+        [];
+    return {
+        streams: `#/metadetails/${encodeURIComponent(metaItem.type)}/${encodeURIComponent(metaItem.id)}/${encodeURIComponent(video.id)}`,
+        // TODO check if stream is external
+        player: typeof stream === 'object' && typeof streamTransportUrl === 'string' ?
+            `#/player/${serializeStream(stream)}/${encodeURIComponent(streamTransportUrl)}/${encodeURIComponent(metaTransportUrl)}/${encodeURIComponent(metaItem.type)}/${encodeURIComponent(metaItem.id)}/${encodeURIComponent(video.id)}`
+            :
+            Array.isArray(video.streams) && video.streams.length === 1 ?
+                `#/player/${serializeStream(video.streams[0])}/${encodeURIComponent(metaTransportUrl)}/${encodeURIComponent(metaTransportUrl)}/${encodeURIComponent(metaItem.type)}/${encodeURIComponent(metaItem.id)}/${encodeURIComponent(video.id)}`
+                :
+                null
+    };
+};
+
+const withStream = ({ stream, streamTransportUrl, metaTransportUrl, type, id, videoId }) => {
+    return {
+        player: typeof metaTransportUrl === 'string' && typeof type === 'string' && typeof id === 'string' && videoId === 'string' ?
+            `#/player/${serializeStream(stream)}/${encodeURIComponent(streamTransportUrl)}/${encodeURIComponent(metaTransportUrl)}/${encodeURIComponent(type)}/${encodeURIComponent(id)}/${encodeURIComponent(videoId)}`
+            :
+            `#/player/${serializeStream(stream)}`
+    };
+};
+
+const withCatalog = ({ request }) => {
+    return {
+        discover: `#/discover/${encodeURIComponent(request.base)}/${encodeURIComponent(request.path.type_name)}/${encodeURIComponent(request.path.id)}?${new URLSearchParams(request.path.extra).toString()}`
+    };
+};
+
+module.exports = {
+    withCatalog,
+    withMetaItem,
+    withLibItem,
+    withVideo,
+    withStream,
+    serializeStream,
+    deserializeStream
+};
diff --git a/src/common/index.js b/src/common/index.js
index 4edbb546e..c9fb1587f 100644
--- a/src/common/index.js
+++ b/src/common/index.js
@@ -21,6 +21,7 @@ const TextInput = require('./TextInput');
 const { ToastProvider, useToast } = require('./Toast');
 const comparatorWithPriorities = require('./comparatorWithPriorities');
 const CONSTANTS = require('./CONSTANTS');
+const deepLinking = require('./deepLinking');
 const languageNames = require('./languageNames');
 const routesRegexp = require('./routesRegexp');
 const useAnimationFrame = require('./useAnimationFrame');
@@ -60,6 +61,7 @@ module.exports = {
     useToast,
     comparatorWithPriorities,
     CONSTANTS,
+    deepLinking,
     languageNames,
     routesRegexp,
     useAnimationFrame,