From a9820eee5eb50f300fc0488051cb817aa6eaae75 Mon Sep 17 00:00:00 2001
From: bonjinnorenka <32708102+bonjinnorenka@users.noreply.github.com>
Date: Fri, 18 Aug 2023 11:40:50 +0900
Subject: [PATCH] add part of iframe api

---
 assets/js/embed.js                | 118 +++++++++
 assets/js/invidious_iframe_api.js | 383 ++++++++++++++++++++++++++++++
 2 files changed, 501 insertions(+)
 create mode 100644 assets/js/invidious_iframe_api.js

diff --git a/assets/js/embed.js b/assets/js/embed.js
index b11b5e5a..4b741f6f 100644
--- a/assets/js/embed.js
+++ b/assets/js/embed.js
@@ -62,3 +62,121 @@ addEventListener('load', function (e) {
         });
     }
 });
+
+function return_message(message,target_window){
+    if(target_window===undefined){
+        target_window = window.parent;
+    }
+    let url_params = new URLSearchParams(location.search);
+    let widgetid = url_params.get('widgetid');
+    let additional_info = {from:'invidious_control'};
+    if(widgetid!==null){
+        additional_info.widgetid = widgetid;
+    }
+    if(message.message_kind==='event'&&message.eventname==='timeupdate'||message.eventname==='loadedmetadata'){
+        let add_value = {getvolume:player.volume(),getduration:player.duration(),getcurrenttime:player.currentTime(),getplaystatus:player.paused(),getplaybackrate:player.playbackRate(),getloopstatus:player.loop(),getmutestatus:player.muted(),getfullscreenstatus:player.isFullscreen(),getavailableplaybackrates:options.playbackRates,gettitle:player_data.title};
+        additional_info['value'] = add_value;
+    }
+    if(message.eventname==='error'){
+        let add_value = {geterrorcode:player.error().code};
+        additional_info['value'] = add_value;
+    }
+    message = Object.assign(additional_info,message);
+    let target_origin = url_params.get('origin');
+    if(target_origin===null){
+        target_origin = '*';
+    }
+    target_window.postMessage(message,target_origin);
+}
+
+function control_embed_iframe(message){
+    let url_params = new URLSearchParams(location.search);
+    let origin = url_params.get('origin');
+    if(origin===null||origin===message.origin){
+        let widgetid = url_params.get('widgetid');
+        if((widgetid===null&&message.data.widgetid===null)||widgetid===message.data.widgetid&&message.data.target==='invidious_control'){
+            switch(message.data.eventname){
+                case 'play':
+                    player.play();
+                    break;
+                case 'pause':
+                    player.pause();
+                    break;
+                case 'getvolume':
+                    return_message({command:'getvolume',value:player.volume(),message_kind:'info_return'},message.source);
+                    break;
+                case 'setvolume':
+                    player.volume(message.data.value);
+                    break;
+                case 'getduration':
+                    return_message({command:'getduration',value:player.duration(),message_kind:'info_return'},message.source);
+                    break;
+                case 'getcurrenttime':
+                    return_message({command:'getcurrenttime',value:player.currentTime(),message_kind:'info_return'},message.source);
+                    break;
+                case 'seek':
+                    const duration = player.duration();
+                    let newTime = helpers.clamp(message.data.value, 0, duration);
+                    player.currentTime(newTime);
+                    break;
+                case 'getplaystatus':
+                    return_message({command:'getplaystatus',value:player.paused(),message_kind:'info_return'},message.source);
+                    break;
+                case 'getplaybackrate':
+                    return_message({command:'getplaybackrate',value:player.playbackRate(),message_kind:'info_return'},message.source);
+                    break;
+                case 'setplaybackrate':
+                    player.playbackRate(message.data.value);
+                    break;
+                case 'getavailableplaybackrates':
+                    return_message({command:'getavailableplaybackrates',value:options.playbackRates,message_kind:'info_return'},message.source);
+                    break;
+                case 'getloopstatus':
+                    return_message({command:'getloopstatus',value:player.loop(),message_kind:'info_return'},message.source);
+                    break;
+                case 'setloopstatus':
+                    player.loop(message.data.value);
+                    break;
+                case 'getmutestatus':
+                    return_message({command:'getmutestatus',value:player.muted(),message_kind:'info_return'},message.source);
+                    break;
+                case 'setmutestatus':
+                    player.muted(message.data.value);
+                    break;
+                case 'gettitle':
+                    return_message({command:'gettitle',value:player_data.title,message_kind:'info_return'},message.source);
+                    break;
+                case 'getfullscreenstatus':
+                    return_message({command:'getfullscreenstatus',value:player.isFullscreen(),message_kind:'info_return'},message.source);
+                    break;
+                case 'requestfullscreen':
+                    player.requestFullscreen();
+                    break;
+                case 'exitfullscreen':
+                    player.exitFullscreen();
+                    break;
+                case 'geterrorcode':
+                    return_message({command:'geterrorcode',value:player.error().code,message_kind:'info_return'},message.source);
+                    break;
+                case 'getplaylist':
+
+            }
+        }
+    }
+}
+
+if(new URLSearchParams(location.search).get('enablejsapi')==='1'){
+    window.addEventListener('message',control_embed_iframe);
+    player.on('ended',function(){return_message({message_kind:'event',eventname:'ended'})});
+    player.on('error',function(){return_message({message_kind:'event',eventname:'error'})});
+    player.on('ratechange',function(){return_message({message_kind:'event',eventname:'ratechange'})});
+    player.on('volumechange',function(){return_message({message_kind:'event',eventname:'volumechange'})});
+    player.on('waiting',function(){return_message({message_kind:'event',eventname:'waiting'})});
+    player.on('timeupdate',function(){return_message({message_kind:'event',eventname:'timeupdate'})});
+    player.on('loadedmetadata',function(){return_message({message_kind:'event',eventname:'loadedmetadata'})});
+    player.on('play',function(){return_message({message_kind:'event',eventname:'play'})});
+    player.on('seeking',function(){return_message({message_kind:'event',eventname:'seeking'})});
+    player.on('seeked',function(){return_message({message_kind:'event',eventname:'seeked'})});
+    player.on('playerresize',function(){return_message({message_kind:'event',eventname:'playerresize'})});
+    player.on('pause',function(){return_message({message_kind:'event',eventname:'pause'})});
+}
\ No newline at end of file
diff --git a/assets/js/invidious_iframe_api.js b/assets/js/invidious_iframe_api.js
new file mode 100644
index 00000000..cc8a259f
--- /dev/null
+++ b/assets/js/invidious_iframe_api.js
@@ -0,0 +1,383 @@
+class invidious_embed{
+    static widgetid = 0;
+    static eventname_table = {onPlaybackRateChange:'ratechange',onStateChange:'statechange',onerror:'error'};
+    static api_promise = false;
+    addEventListener(eventname,func){
+        if(eventname in invidious_embed.eventname_table){
+            this.eventobject[invidious_embed.eventname_table[eventname]].push(func);
+        }
+        else{
+            try{
+                this.eventobject[eventname].push(func);
+            }
+            catch{}
+        }
+    }
+    removeEventListner(eventname,func){
+        var internal_eventname;
+        if(eventname in invidious_embed.eventname_table){
+            internal_eventname = invidious_embed.eventname_table[eventname];
+        }
+        else{
+            internal_eventname = eventname;
+        }
+        this.eventobject[internal_eventname] = this.eventobject[internal_eventname].fillter(x=>x!==func);
+    }
+    Player(element,options){
+        this.player_status = -1;
+        this.error_code = 0;
+        var replace_elemnt;
+        if(element===undefined||element===null){
+            throw 'please set element id or HTMLElement';
+        }
+        else if(typeof element==='string'){
+            replace_elemnt = document.getElementById(element);
+        }
+        else{
+            replace_elemnt = element;
+        }
+        var iframe_src = '';
+        if(options.host!==undefined&&options.host!==""){
+            iframe_src = new URL(options.host).origin;
+        }
+        else{
+            iframe_src = 'https://vid.puffyan.us';//I set most hot instanse but this may need discuss or change ay to default instanse
+        }
+        this.target_origin = iframe_src.slice();
+        iframe_src += '/embed/';
+        if(typeof options.videoId==='string'&&options.videoId.length===11){
+            iframe_src += options.videoId;
+            this.videoId = options.videoId;
+        }
+        else{
+            this.error_code = 2;
+            this.event_executor('error');
+        }
+        var search_params = new URLSearchParams('');
+        search_params.append('widgetid',invidious_embed.widgetid);
+        this.widgetid = invidious_embed.widgetid;
+        invidious_embed.widgetid++;
+        search_params.append('origin',location.origin);
+        search_params.append('enablejsapi','1');
+        if(typeof options.playerVars==='object'){
+            this.option_playerVars = options.playerVars;
+            for(var x in options.playerVars){
+                if(typeof x==='string'&&typeof options.playerVars[x]==='string'){
+                    search_params.append(x,options.playerVars[x]);
+                }
+            }
+            if(options.playerVars.autoplay===undefined){
+                search_params.append('autoplay','0');
+            }
+        }
+        iframe_src += "?" + search_params.toString();
+        if(options.events!==undefined&&typeof options.events==='object'){
+            for(let x in options.events){
+                this.addEventListener(x,options.events[x]);
+            }
+        }
+        this.player_iframe = document.createElement("iframe");
+        this.loaded = false;
+        this.addEventListener('loadedmetadata',()=>{this.event_executor('ready');this.loaded=true});
+        this.player_iframe.src = iframe_src;
+        if(options.width!==undefined&&typeof options.width==='number'){
+            this.player_iframe.width = options.width;
+        }
+        else{
+            if(document.body.clientWidth < 640){
+                this.player_iframe.width = document.body.clientWidth;
+            }
+            else{
+                this.player_iframe.width = 640;
+            }
+        }
+        if(options.width!==undefined&&typeof options.width==='number'){
+            this.player_iframe.width = options.width;
+        }
+        else{
+            this.player_iframe.height = this.player_iframe.width * (9/16);
+        }
+        this.player_iframe.style.border = "none";
+        this.eventobject = {ready:[],ended:[],error:[],ratechange:[],volumechange:[],waiting:[],timeupdate:[],loadedmetadata:[],play:[],seeking:[],seeked:[],playerresize:[],pause:[],statechange:[]};
+        replace_elemnt.replaceWith(this.player_iframe);
+        this.eventdata = {};
+        return this;
+    }
+    postMessage(data){
+        var additionalInfo = {'origin':location.origin,'widgetid':String(this.widgetid),'target':'invidious_control'};
+        data = Object.assign(additionalInfo,data);
+        this.player_iframe.contentWindow.postMessage(data,this.target_origin);
+    }
+    event_executor(eventname){
+        var execute_functions = this.eventobject[eventname];
+        var return_data = {data:undefined,target:this};
+        if(eventname==='statechange'){
+            return_data.data = this.getPlayerState();
+        }
+        for(var x=0;x<execute_functions.length;x++){
+            try{
+                execute_functions[x](return_data);
+            }
+            catch{}
+        }
+    }
+    receiveMessage(message){
+        if(message.data.from==='invidious_control'&&message.data.widgetid===String(this.widgetid)){
+            switch(message.data.message_kind){
+                case 'info_return':
+                    var promise_array = this.message_wait[message.data.command];
+                    for(var x=0;x<promise_array.length;x++){
+                        if(message.data.command==='getvolume'){
+                            promise_array[x](message.data.value*100);
+                        }
+                        else{
+                            promise_array[x](message.data.value);
+                        }
+                    }
+                    this.message_wait[message.data.command] = [];
+                    break;
+                case 'event':
+                    if(message.data.eventname!==undefined&&typeof message.data.eventname==='string'){
+                        this.event_executor(message.data.eventname);
+                        var previous_status = this.player_status;
+                        switch(message.data.eventname){
+                            case 'ended':
+                                this.player_status = 0;
+                                break;
+                            case 'play':
+                                this.player_status = 1;
+                                break;
+                            case 'timeupdate':
+                                this.player_status = 1;
+                                this.eventdata = Object.assign({},this.eventdata,message.data.value);
+                                break;
+                            case 'pause':
+                                this.player_status = 2;
+                                break;
+                            case 'waiting':
+                                this.player_status = 3;
+                                break;
+                            case 'loadedmetadata':
+                                this.eventdata = Object.assign({},this.eventdata,message.data.value);
+                                break;
+                        }
+                        if(previous_status!==this.player_status){
+                            this.event_executor('statechange');
+                        }
+                    }
+            }
+        }
+    }
+    promise_resolve(){
+        var res_outer;
+        var pro = new Promise((res,rej)=>{res_outer=res});
+        return {'promise':pro,'resolve':res_outer};
+    }
+    promise_send_event(event_name){
+        if(invidious_embed.api_promise){
+            var pro_object = this.promise_resolve();
+            this.message_wait[event_name].push(pro_object.resolve);
+            this.postMessage({eventname:event_name});
+            return pro_object.promise;
+        }
+        else{
+            return this.eventdata[event_name];
+        }
+    }
+    getPlayerState(){
+        return this.player_status;
+    }
+    playVideo(){
+        this.postMessage({eventname:'play'});
+    }
+    pauseVideo(){
+        this.postMessage({eventname:'pause'});
+    }
+    getVolume(){
+        return this.promise_send_event('getvolume');
+    }
+    setVolume(volume){
+        volume = Number(volume);
+        if(volume!==NaN&&volume!=undefined&&volume>=0&&volume<=100){
+            this.postMessage({eventname:'setvolume',value:volume/100});
+        }
+    }
+    getIframe(){
+        return this.player_iframe;
+    }
+    destroy(){
+        this.player_iframe.remove();
+    }
+    mute(){
+        this.postMessage({eventname:'setmutestatus',value:true});
+    }
+    unMute(){
+        this.postMessage({eventname:'setmutestatus',value:false});
+    }
+    isMuted(){
+        return this.promise_send_event('getmutestatus');
+    }
+    seekTo(seconds,allowSeekAhead){//seconds must be a number and allowSeekAhead is ignore
+        seconds = Number(seconds);
+        if(seconds!==NaN&&seconds!==undefined){
+            this.postMessage({eventname:'seek',value:seconds});
+        }
+    }
+    setSize(width,height){//width and height must be Number
+        this.player_iframe.width = Number(width);
+        this.player_iframe.height = Number(height);
+    }
+    getPlaybackRate(){
+        return this.promise_send_event('getplaybackrate');
+    }
+    setPlaybackRate(suggestedRate){//suggestedRate must be number.this player allow not available playback rate such as 1.4
+        suggestedRate = Number(suggestedRate);
+        if(suggestedRate!==NaN&&suggestedRate!==undefined){
+            this.postMessage({eventname:'setplaybackrate',value:suggestedRate});
+        }
+    }
+    getAvailablePlaybackRates(){
+        return this.promise_send_event('getavailableplaybackrates');
+    }
+    playOtherVideoById(option,autoplay,startSeconds_arg){//internal fuction
+        let videoId = '';
+        let startSeconds = -1;
+        let endSeconds = -1;
+        let mediaContetUrl = '';
+        if(typeof option==='string'){
+            if(option.length===11){
+                videoId = option
+            }
+            else{
+                mediaContetUrl = option;
+            }
+            if(startSeconds_arg!==undefined&&typeof startSeconds_arg==='number'){
+                startSeconds = startSeconds_arg;
+            }
+        }
+        else if(typeof option==='object'){
+            if(option.videoId!==undefined&&typeof option.videoId==='string'){
+                if(option.videoId.length==11){
+                    videoId = option.videoId;
+                }
+                else{
+                    this.error_code = 2;
+                    this.event_executor('error');
+                }
+            }
+            else if(option.mediaContentUrl!==undefined&&typeof option.mediaContentUrl==='string'){
+                mediaContetUrl = option.mediaContentUrl;
+            }
+            else{
+                this.error_code = 2;
+                this.event_executor('error');
+            }
+            if(option.startSeconds!==undefined&&typeof option.startSeconds==='number'&&option.startSeconds>=0){
+                startSeconds = option.startSeconds;
+            }
+            if(option.endSeconds!==undefined&&typeof option.endSeconds==='number'&&option.endSeconds>=0){
+                startSeconds = option.endSeconds;
+            }
+        }
+        if(mediaContetUrl.length>0){
+            var tmp_videoId = '';
+            if(mediaContetUrl.indexOf('/v/')!==-1){
+                var end_pos = mediaContetUrl.length-1;
+                if(mediaContetUrl.indexOf('?')!==-1){
+                    end_pos = mediaContetUrl.indexOf('?');
+                }
+                tmp_videoId = mediaContetUrl.substring(mediaContetUrl.indexOf('/v/'),end_pos);
+            }
+            else{
+                tmp_videoId = new URL(mediaContetUrl).searchParams.get('v');
+            }
+            if(tmp_videoId===null||tmp_videoId.length!==11){
+                this.error_code = 2;
+                this.event_executor('error');
+            }
+            videoId = tmp_videoId;
+        }
+        var iframe_sorce = this.target_origin.slice();
+        iframe_sorce += "/embed/" + videoId;
+        this.videoId = videoId;
+        var search_params = new URLSearchParams('');
+        search_params.append('origin',location.origin);
+        search_params.append('enablejsapi','1');
+        search_params.append('widgetid',invidious_embed.widgetid);
+        this.widgetid = invidious_embed.widgetid;
+        invidious_embed.widgetid++;
+        if(autoplay){
+            search_params.append('autoplay',1);
+        }
+        else{
+            search_params.append('autoplay',0);
+        }
+        if(this.option_playerVars!==undefined){
+            for(var x in this.option_playerVars){
+                if(x!=='autoplay'&&x!=='start'&&x!=='end'){
+                    search_params.append(x,this.option_playerVars[x]);
+                }
+            }
+        }
+        if(startSeconds!==-1&&startSeconds>=0){
+            search_params.append('start',startSeconds);
+        }
+        if(endSeconds!==-1&&endSeconds>=0){
+            if(endSeconds>startSeconds){
+                search_params.append('end',endSeconds);
+            }
+            else{
+                throw 'invalid end seconds';
+            }
+        }
+        iframe_sorce += "?" + search_params.toString();
+        this.player_iframe.src = iframe_sorce;
+        if(autoplay){
+            this.player_status = 5;
+        }
+        this.eventdata = {};
+    }
+    loadVideoById(option,startSeconds){
+        this.playOtherVideoById(option,true,startSeconds);
+    }
+    cueVideoById(option,startSeconds){
+        this.playOtherVideoById(option,false,startSeconds);
+    }
+    cuevVideoByUrl(option,startSeconds){
+        this.playOtherVideoById(option,false,startSeconds);
+    }
+    loadVideoByUrl(option,startSeconds){
+        this.playOtherVideoById(option,true,startSeconds);
+    }
+    getDuration(){
+        return this.promise_send_event('getduration');
+    }
+    getVideoUrl(){
+        return this.target_origin + "/watch?v=" + this.videoId;
+    }
+    getVideoTitle(){//original function
+        return this.promise_send_event('gettitle');
+    }
+    async getVideoEmbedCode(){
+        var title = await this.getVideoTitle();
+        return '<iframe width="560" height="315" src="' + this.target_origin + "/embed/" + this.videoId + '" title="' + title.replace('"','') + '" frameborder="0" allow="autoplay;encrypted-media;picture-in-picture; web-share" allowfullscreen></iframe>';
+    }
+    getCurrentTime(){
+        return this.promise_send_event('getcurrenttime');
+    }
+    constructor(element,options){
+        this.Player(element,options);
+        window.addEventListener('message',(ms)=>{this.receiveMessage(ms)});
+        this.message_wait = {getvolume:[],getmutestatus:[],getduration:[],getcurrenttime:[],getplaybackrate:[],getavailableplaybackrates:[],gettitle:[]};
+    }
+}
+function invidious_ready(func){
+    if(typeof func==='function'){
+        func();
+    }
+}
+const invidious = {Player:invidious_embed,PlayerState:{ENDED:0,PLAYING:1,PAUSED:2,BUFFERING:3,CUED:5},ready:invidious_ready};
+try{
+    onInvidiousIframeAPIReady();
+}
+catch{}