From 1ef98569623b58f8b4e2b5863cea02bfb1e91a98 Mon Sep 17 00:00:00 2001
From: ulrich
Date: Thu, 21 Nov 2024 22:38:22 +0000
Subject: [PATCH] 'Hier spielen' berichtigt

---
 www/js/app.js |  184 ++++++++++++++++++---------------------------
 1 files changed, 74 insertions(+), 110 deletions(-)

diff --git a/www/js/app.js b/www/js/app.js
index fa85ba9..fafbd3d 100644
--- a/www/js/app.js
+++ b/www/js/app.js
@@ -11,6 +11,7 @@
   var audioCtx;
   var playState; // 'pause' oder 'play' oder 'stop'
   var audioElem;
+  var playingList;
 
   this.init = function () {
     self.mediaPfad = '/';
@@ -363,7 +364,10 @@
       self.addEvtListener('#pause-btn', 'click', function() {
         self.kommando('pause');
       });
-      self.addEvtListener('#weiter-btn', 'click', self.weiter);
+      //self.addEvtListener('#weiter-btn', 'click', self.weiter);
+      self.addEvtListener('#weiter-btn', 'click', function() {
+        self.kommando('next');
+      });
 
       self.addEvtListener('#hier-btn', 'click', self.hier_spielen);
       
@@ -481,32 +485,47 @@
     }
   };
   
+  /*
+   * DEPRECATED
+   */
   this.weiter = function() {
-    var bereichName = document.querySelector('.bereich-name').textContent;
-    if(bereichName === '') {
-      var titel = self.titelErmitteln(document.querySelector(".selected"));
-      var playername = document.querySelector('#abspieler').value;
-      console.log('plname: ' + playername + ' url: ' + titel.katalogUrl + titel.pfad + titel.name);
-      self.http_post('api/strg/' + playername + '/weiter/titel', JSON.stringify(titel), function(responseText) {
-        self.meldung_mit_timeout(responseText, 1500);
-      });   
-    }
+    //var bereichName = document.querySelector('.bereich-name').textContent;
+    //if(bereichName === '') {
+    //  var titel = self.titelErmitteln(document.querySelector(".selected"));
+    //  var playername = document.querySelector('#abspieler').value;
+    //  console.log('plname: ' + playername + ' url: ' + titel.katalogUrl + titel.pfad + titel.name);
+    //  self.http_post('api/strg/' + playername + '/weiter/titel', JSON.stringify(titel), function(responseText) {
+    //    self.meldung_mit_timeout(responseText, 1500);
+    //  });   
+    //}
   };
   
+  /*
+   * Ein Abspieler-Kommando ausfuehren. Der Client entscheidet anhand
+   * des Indikators self.playingIndex, ob 'hier spielen' gewaehlt wurde 
+   * (playingIndex groesser -1) oder das Kommando an den Server gehen soll.
+   * 
+   * self.kommendo('play') wird nur von der Schaltflaeche 'hier spielen' gerufen.
+   * Die Schaltflaeche Play ist mit self.play verknuepft (s.o.) und spielt Listen 
+   * oder Titel ueber des Server und Calypso.
+   * 
+   * @param {type} kommando stop, pause, next, play
+   * @returns nichts
+   */
   this.kommando = function(kommando) {
     console.log(kommando);
     if(self.playingIndex > -1) {
-      //const audioElements = document.querySelectorAll('.entity-eintrag');
-      //const audioElements = document.querySelectorAll("audio");
-      //const audioCtx = new (window.AudioContext || window.webkitAudioContext)();
-      //const track = self.audioCtx.createMediaElementSource(audioElements[self.playingIndex]);
-      //track.connect(self.audioCtx.destination);
       if(kommando === 'stop') {
         self.audioElem.pause();
         self.audioElem.currentTime = 0;
         self.audioElem.removeEventListener("ended", self.nextTrack);
         self.playingIndex = -1;
         self.playState = 'stop';
+      } else if(kommando === 'next') {
+        const curidx = self.playingIndex;
+        self.kommando('stop');
+        self.playingIndex = curidx;
+        self.nextTrack();
       } else if(kommando === 'pause') {
         if(self.playState === 'pause') {
           self.playState = 'play';
@@ -562,116 +581,56 @@
       console.log(
         "play playlist.value: " + document.querySelector('#playlist').value + 
         ", abspieler.value: " + document.querySelector('#abspieler').value);
-      // hier noch URL fuer Stream der Abspielliste abrufen
-      // Es muss auch noch die Funktion auf dem Server gabut werden, die 
-      // eine Abspielliste als Stream liefert
-      //url = 'Stream fuer Abspielliste ' + lst + ' noch nicht gebaut.';
-      //self.hier_spielen_liste();
       self.playingIndex = -1;
       self.nextTrack();
     }
-    //console.log('url: ' + url);
-    //window.open(url);
   };  
   
-  this.hier_spielen_liste = function() {
-    const elements = document.querySelectorAll('.entity-eintrag');
-
-    //var i = 0;
-    //var ersterTitel;
-    //elements.forEach(function (element) {
-    //  const attr = element.attributes;
-    //  var titel = host + attr.getNamedItem('data-kat').value + 
-    //          attr.getNamedItem('data-pfad').value + attr.getNamedItem('data-datei').value;
-    //  console.log(titel);
-      // + element.data-pfad + element.data-datei);
-    //  if(i++ === 0) {
-    //    ersterTitel = titel;
-    //  }
-    //});
-    
-    
-    // Web Audio API Player ab hier
-    
-    //const audioCtx = new (window.AudioContext || window.webkitAudioContext)();
-
-    //const AudioContext = window.AudioContext || window.webkitAudioContext;
-    //const audioContext = new AudioContext();    
-    
-    // get the audio elements
-    self.playingIndex = -1;
-    //const audioElements = document.querySelectorAll("audio");
-
-    // pass it into the audio context
-    //const track = audioCtx.createMediaElementSource(audioElements[self.playingIndex]);
-    //track.connect(audioCtx.destination);
-    
-    //audioElements[self.playingIndex].addEventListener(
-    //  "ended",
-    //  () => {
-    //    
-    //  },
-    //  false
-    //);    
-    
-    //audioElements[self.playingIndex].play();
-    self.nextTrack();
-  };
-  
   this.nextTrack = function() {
-    // ...
-    // mySound = new Audio('sound.mp3');
-    // mySound.play()
-    // const audioElements = document.querySelectorAll("audio");
-    const audioElements = document.querySelectorAll('.entity-eintrag');
+    /*
+      
+      {
+        "katalogUrl":"/media",
+        "pfad":"/Musik/M/Bruno-Mars/",
+        "name":"04-Uptown-Funk.mp3",
+        "interpret":"Mark Ronson feat Bruno Mars",
+        "titelAnzName":"Uptown Funk",
+        "album":"Uptown Special Explicit"
+      }
     
-    
-    
+     */
+    //const plname = document.querySelector('#playlist').value;
     if(self.playingIndex > -1) {
       self.audioElem.removeEventListener("ended", self.nextTrack);
-      //audioElements[self.playingIndex].removeEventListener("ended", self.nextTrack);
-      //const element = audioElements[self.playingIndex];
-      //const attr = element.attributes;
-      //var titel = host + attr.getNamedItem('data-kat').value + 
-      //        attr.getNamedItem('data-pfad').value + attr.getNamedItem('data-datei').value;
-      //const titelElem = new Audio(titel);        
+    } else {
+      self.playingList = document.querySelector('#playlist').value;
     }
-    // <audio class='audio-elem' src='/tango{{katalogUrl}}{{pfad}}{{name}}'></audio>
     self.playingIndex++;
-    if(self.playingIndex < audioElements.length) {
-      //const element = audioElements[self.playingIndex];
-      //const attr = element.attributes;
-      //var titel = host + attr.getNamedItem('data-kat').value + 
-      //        attr.getNamedItem('data-pfad').value + attr.getNamedItem('data-datei').value;
-      const titel = self.getTitelFromAudioElement(audioElements, self.playingIndex);
-      console.log("titel: " + titel);
-      //const titelElem = new Audio(titel);        
-      self.audioElem = new Audio(titel);
-      
-      self.audioElem.addEventListener("ended", self.nextTrack);
-      self.audioCtx = new (window.AudioContext || window.webkitAudioContext)();
-      const track = self.audioCtx.createMediaElementSource(self.audioElem);
-      track.connect(self.audioCtx.destination);
-      self.audioElem.play();
-      self.playState = 'play';
-      
-      
-      //const audioCtx = new (window.AudioContext || window.webkitAudioContext)();
-    }
+    const url = 'api/alist/' + self.playingList + "/" + self.playingIndex;
+    self.http_get(url, function(responseText){
+      if(responseText === 'eom') {
+        // ende
+        self.audioElem.removeEventListener("ended", self.nextTrack);
+        self.playingIndex = -1;
+        self.playState = 'stop';
+      } else {
+        const titel = JSON.parse(responseText);
+        console.log("titel: " + titel.name);
+        const titelUrl = self.getTitelFromJSONObj(titel);
+        //const titelElem = new Audio(titel);        
+        self.audioElem = new Audio(titelUrl);
+        self.audioElem.addEventListener("ended", self.nextTrack);
+        self.audioElem.play();
+        self.playState = 'play'; 
+      }
+    });
   };
-  
-  this.getTitelFromAudioElement = function(audioElements, index) {
+
+  this.getTitelFromJSONObj = function(titelObj) {
     //const audioElements = document.querySelectorAll('.entity-eintrag');
     const host = 'http://' + window.location.host + '/tango';
-    const element = audioElements[index];
-    const attr = element.attributes;
-    const titel = host + attr.getNamedItem('data-kat').value + 
-              attr.getNamedItem('data-pfad').value + attr.getNamedItem('data-datei').value;
+    const titel = host + titelObj.katalogUrl + titelObj.pfad + titelObj.name;
     return titel;
-  };
-  
-  this.stop_liste_hier = function() {
-    
   };
   
   this.gehe_zu_dialog_zeigen = function () {
@@ -765,6 +724,11 @@
     self.http_delete('api/alist/' + plname + '/' + index,'', function(responseText) {
       // DELETE	http://localhost:9090/mz/api/alist/liste1/0
       //self.meldung_mit_timeout(responseText, 1500);
+      if(self.playingList === plname) {
+        if(self.playingIndex > index) {
+          --self.playingIndex;
+        }
+      }
       self.titel_liste();
     });
     

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