From 3e5a56229e91e42b8080dc7ee5f9461774cf2879 Mon Sep 17 00:00:00 2001
From: ulrich
Date: Fri, 16 Apr 2021 06:46:34 +0000
Subject: [PATCH] Geraete-Liste zum Ein- und Ausschalten (in Arbeit)

---
 www/ui/js/app.js |  738 +++++++++++++++++++++++++++++++++++++++++++++++---------
 1 files changed, 619 insertions(+), 119 deletions(-)

diff --git a/www/ui/js/app.js b/www/ui/js/app.js
index b7b98a2..489cad0 100644
--- a/www/ui/js/app.js
+++ b/www/ui/js/app.js
@@ -1,84 +1,276 @@
-function Ablageort(n, o, u) {
-  this.name = n;
-  this.ort = o;
-  this.url = u;
-}
-
-
-
 function Mediazentrale() {
   var self = this;
   var appMenu;
   var cache; // mustache templates
   var ortPfad;
   var mediaPfad;
+  var katUrl;
+  var selTitel;
+  var katName;
+
+  this.init = function () {
+    self.mediaPfad = '/';
+    self.ortPfad = '/';
+    self.cache = new Array();
+    self.appMenu = new AppMenu();
+    self.appMenu.init(
+            "data/menu/",
+            "hauptmenue.json",
+            "data/tpl/app-menu.txt",
+            ".west",
+            "6em");
+
+    document.querySelector('.hamburger').addEventListener('click', function (e) {
+      self.menue_umschalten();
+    });
+    
+    self.addEvtListener('#mi-katalog', 'click', self.media_liste);
+    self.addEvtListener('#mi-orte', 'click', self.ablageort_liste);
+    self.addEvtListener('#mi-prefs', 'click', self.prefs_liste);
+    self.addEvtListener('#mi-player', 'click', self.abspieler_liste);
+    self.addEvtListener('#mi-listen', 'click', self.abspielliste_liste);
+    self.addEvtListener('#mi-list', 'click', self.titel_liste);
+    self.addEvtListener('#mi-live', 'click', self.livestream_liste);
+    self.addEvtListener('#mi-devices', 'click', self.geraet_liste);
+    
+    self.fusszeile_umschalten();
+    self.seitenleiste_umschalten();
+    self.dialog_unten_zeigen();
+  };
   
+  /* ---------------- Entitaets-Listen ----------------- */
+  
+  this.livestream_selection = function() {
+    document.querySelector('.breadcrumb-behaelter').textContent = '';
+    document.querySelector('.bereich-name').textContent = 'Livestream-Auswahl'; 
+    self.http_get('../api/store/Livestream/liste/', function(responseText) {
+      self.vorlage_laden_und_fuellen("data/tpl/livestream_liste.txt", JSON.parse(responseText), function (html) {
+        document.querySelector(".zentraler-inhalt").innerHTML = html;
+        self.addEvtListener('.entity-eintrag', 'click', function (event) {
+          var t = event.target;
+          self.removeClassMulti('selected');
+          t.classList.add('selected');          
+        });
+      });
+    });
+  };
+
   // auf der obersten Ebene werden die Kataloge angezeigt,
   // darunter der Inhalt des aktuellen Pfades
   this.media_liste = function() {
+    self.reset_top_buttons(); 
+    //console.log("ortPfad: " + self.ortPfad + ", mediaPfad: " + self.mediaPfad);
+    document.querySelector('.bereich-name').textContent = '';    
     if(self.ortPfad === '/') {
+      var bb = document.querySelector('.breadcrumb-behaelter');
+      bb.textContent = "Kataloge";
       // Kataloge listen
-      self.http_get('../api/store/Ablageort/', function (responseText) {
-        self.vorlage_laden_und_fuellen("data/tpl/katalog_root_liste.tpl", JSON.parse(responseText), function (html) {
+      self.http_get('../api/store/Ablageort/liste/', function (responseText) {
+        //document.querySelector('#top-up-btn').removeEventListener('click', self.media_liste_herauf);
+        self.vorlage_laden_und_fuellen("data/tpl/katalog_root_liste.txt", JSON.parse(responseText), function (html) {
           document.querySelector(".zentraler-inhalt").innerHTML = html;
           self.addEvtListener('.entity-eintrag', 'click', function (event) {
             var t = event.target;
-            self.http_get('../api/store/Ablageort/' + t.textContent, function(responseText) {
-              var ablageort = JSON.parse(responseText);
-              console.log(ablageort.url);
-              self.ortPfad = ablageort.url;
-              self.media_liste();
-            });
+            self.katName = t.textContent;
+            if(self.katName !== "Livestreams") {
+              self.http_get('../api/store/Ablageort/' + t.textContent, function(responseText) {
+                var ablageort = JSON.parse(responseText);
+                self.ortPfad = ablageort.url;
+                self.media_liste();
+              });
+            } else {
+              self.livestream_selection();
+            }
           });
         });
       });
     } else {
-      // Pfad listen
-      self.http_get('..' + self.ortPfad + '/' + self.mediaPfad + '/', function(responseText) {
-        //console.log(responseText);
-        self.vorlage_laden_und_fuellen("data/tpl/katalog_inhalt_liste.tpl", JSON.parse(responseText), function (html) {
+      var bb = document.querySelector('.breadcrumb-behaelter');
+      var brPfad = self.katName + self.mediaPfad;
+      var breadcrumbs = brPfad.split('/');
+      var brLinks = "";
+      var brLinkPfad = "";
+      for(var index = 0; index < breadcrumbs.length; index++) {
+        // <a class="breadcrumb-link" href="#">breadcrumbs[index]</a>
+        if(index === 0) {
+          brLinkPfad = '/';
+        } else {
+          brLinkPfad = brLinkPfad + '/' + breadcrumbs[index];
+        }
+        brLinks = brLinks + "<a brlink='" + brLinkPfad + "' class='breadcrumb-link' href='#'>" + breadcrumbs[index] + "</a>";
+        //console.log('   breadcrumbs[' + index + ']: ' + breadcrumbs[index]);
+      }
+      bb.innerHTML = brLinks;
+      self.addEvtListener('.breadcrumb-link', 'click', function(event) {
+        //console.log(event.target.attributes.brlink.nodeValue);
+        var neuerPfad = event.target.attributes.brlink.nodeValue;
+        self.mediaPfad = neuerPfad;
+        self.media_liste();
+      });
+      var url = '..' + self.ortPfad + self.mediaPfad;
+      if(!url.endsWith('/')) {
+        url = url + '/';
+      }
+      self.http_get(url, function(responseText) {
+        self.vorlage_laden_und_fuellen("data/tpl/katalog_inhalt_liste.txt", JSON.parse(responseText), function (html) {
           document.querySelector(".zentraler-inhalt").innerHTML = html;
           self.addEvtListener('.entity-eintrag', 'click', function (event) {
             var t = event.target;
-            //console.log(t.textContent);
+            var tx = t.textContent;
             if(t.classList.contains("entity-typ-folder")) {
-              self.mediaPfad = self.mediaPfad + '/' + t.textContent;
+              if(self.mediaPfad.endsWith('/')) {
+                self.mediaPfad = self.mediaPfad + tx;                
+              } else {
+                self.mediaPfad = self.mediaPfad + '/' + tx;
+              }
               self.media_liste();
             } else {
-              console.log("Media-Inhalt auswaehlen oder abspielen");
+              if(t.classList.contains('selected')) {
+                t.classList.add('added-to-playlist');
+                self.titelDazu();
+              } else {
+                self.removeClassMulti('selected');
+                t.classList.add('selected');
+              }
+              //self.selTitel = new Titel(t.textContent, self.ortPfad);       
             }
           });
-          self.addEvtListener('#zurueck-btn', 'click', function (event) {
+          self.addEvtListener('#top-up-btn', 'click', function(event) {
             if(self.mediaPfad === '/') {
               self.ortPfad = '/';              
             } else {
               var pos = self.mediaPfad.lastIndexOf('/');
-              var parent = self.mediaPfad.substring(0, pos);
-              //console.log("Parent: " + parent);
+              var parent;
+              if(pos > 1) {
+                parent = self.mediaPfad.substring(0, pos);
+              } else {
+                parent = '/';
+              }
               self.mediaPfad = parent;
             }
             self.media_liste();
-          });        
+          });
         });
       });
     }
   };
+  
+  this.geraet_schalt_liste = function() {
+    self.entitaet_liste('Geräte schalten','../api/store/Geraet/liste/', 
+      "data/tpl/geraet_schalt_liste.txt", '../api/store/Geraet/', 
+      "self.form_geraet_status", function(responseText) {
+        var geraet = JSON.parse(responseText);
+        self.geraet_status_form(geraet);
+      });
+  };
+  
+  this.geraet_liste = function() {
+    self.entitaet_liste('Geräte','../api/store/Geraet/liste/', 
+      "data/tpl/geraet_liste.txt", '../api/store/Geraet/', 
+      "self.geraet_form", function(responseText) {
+        var geraet = JSON.parse(responseText);
+        self.geraet_form(geraet);
+      });
+  };
 
   this.ablageort_liste = function() {
-    self.http_get('../api/store/Ablageort/', function (responseText) {
-      self.vorlage_laden_und_fuellen("data/tpl/ablageort_liste.tpl", JSON.parse(responseText), function (html) {
-        document.querySelector(".zentraler-inhalt").innerHTML = html;
-        self.addEvtListener('.entity-eintrag', 'click', function (event) {
-          var t = event.target;
-          self.http_get('../api/store/Ablageort/' + t.textContent, function(responseText){
-            var ablageort = JSON.parse(responseText);
-            self.ablageort_form(ablageort);
-          });
-        });
-        self.addEvtListener('#neu-btn', 'click', function (event) {
-          eval("self.ablageort_form" + "(this)");
-        });        
+    self.entitaet_liste('Kataloge','../api/store/Ablageort/liste/', 
+      "data/tpl/ablageort_liste.txt", '../api/store/Ablageort/', 
+      "self.ablageort_form", function(responseText) {
+        var ablageort = JSON.parse(responseText);
+        self.ablageort_form(ablageort);
       });
+  };
+
+  this.prefs_liste = function() {
+    self.entitaet_liste('Einstellungen','../api/store/Einstellung/liste/', 
+      "data/tpl/einstellung_liste.txt", '../api/store/Einstellung/', 
+      "self.prefs_form", function(responseText) {
+        var einstellung = JSON.parse(responseText);
+        self.prefs_form(einstellung);
+      });
+  };
+
+  this.abspieler_liste = function() {
+    self.entitaet_liste('Abspieler','../api/store/Abspieler/liste/', 
+      "data/tpl/abspieler_liste.txt", '../api/store/Abspieler/', 
+      "self.abspieler_form", function(responseText) {
+        var abspieler = JSON.parse(responseText);
+        self.abspieler_form(abspieler);
+      });
+  };
+  
+  this.livestream_liste = function() {
+    self.entitaet_liste('Livestream','../api/store/Livestream/liste/', 
+      "data/tpl/livestream_liste.txt", '../api/store/Livestream/', 
+      "self.livestream_form", function(responseText) {
+        var livestream = JSON.parse(responseText);
+        self.livestream_form(livestream);
+      });
+  };
+  
+  this.abspielliste_liste = function() {
+    self.entitaet_liste('Abspielliste','../api/store/Abspielliste/liste/', 
+      "data/tpl/abspielliste_liste.txt", '../api/store/Abspielliste/', 
+      "self.abspielliste_form", function(responseText) {
+        //console.log("responseTest: '" + responseText + "'");
+        var abspielliste = JSON.parse(responseText);
+        self.abspielliste_form(abspielliste);
+      });
+  };
+  
+  /* -------------------- Entitaets-Formulare ------------------ */  
+  
+  this.abspielliste_form = function(al) {
+    self.entitaet_form('Abspielliste', al, al.name,
+      "data/tpl/form_abspielliste.txt", '../api/store/Abspielliste/',
+      '#abspielliste-name', function(event) {
+          if(event !== undefined) {
+            event.preventDefault();
+          }
+          self.abspielliste_auswahl_fuellen();
+          self.abspielliste_liste();
+    });
+  };
+  
+  this.abspieler_form = function(pl) {
+    self.entitaet_form('Abspieler', pl, pl.key,
+      "data/tpl/form_abspieler.txt", '../api/store/Abspieler/',
+      '#abspieler-name', function() { 
+          self.abspieler_auswahl_fuellen();
+          self.abspieler_liste();
+    });
+  };
+
+  this.livestream_form = function(ls) {
+    self.entitaet_form('Livestream', ls, ls.name,
+      "data/tpl/form_livestream.txt", '../api/store/Livestream/',
+      '#livestream-name', function() { 
+          self.livestream_liste();
+    });
+  };
+
+  this.geraet_form = function(ge) {
+    self.entitaet_form('Gerät', ge, ge.name,
+      "data/tpl/form_geraet.txt", '../api/store/Geraet/',
+      '#geraet-name', function() { 
+          self.geraet_liste();
+    });
+  };
+
+  this.geraet_status_form = function(ge) {
+    self.entitaet_form('Gerät', ge, ge.name,
+      "data/tpl/form_geraet_status.txt", '../api/store/Geraet/',
+      '#geraet-name', function() { 
+          self.geraet_schalt_liste();
+    });
+  };
+
+  this.prefs_form = function(k) {
+    self.entitaet_form('Einstellung', k, k.key,
+      "data/tpl/form_einstellung.txt", '../api/store/Einstellung/',
+      '#einstellung-key', function() { 
+          self.prefs_liste();
     });
   };
 
@@ -91,62 +283,350 @@
    * @returns {undefined} kein Rueckgabewert
    */
   this.ablageort_form = function(ort) {
-    self.vorlage_laden_und_fuellen("data/tpl/form_ablageort.tpl", ort, function (html) {
-      document.querySelector(".zentraler-inhalt").innerHTML = html;
-      self.addEvtListener('#ok-btn', 'click', function () {
-        var aName = document.querySelector('#ablageort-name').value;
-        aName = aName.replace(' ', '').replace(/[\W]+/g, '');
-        var a = new Ablageort(
-          aName,
-          document.querySelector('#ablageort-ort').value,
-          document.querySelector('#ablageort-url').value
-        );
-        var daten = JSON.stringify(a);        
-        if(typeof ort === "undefined" || ort.name !== aName) {
-          // neu
-          self.http_post('../api/store/Ablageort', daten, function (responseText) {
-            // hier die Antwort verarbeiten
-          });
-        } else {
-          // aendern
-          self.http_put('../api/store/Ablageort', daten, function (responseText) {
-            // hier die Antwort verarbeiten
-          });
-        }
-        //document.querySelector(".zentraler-inhalt").innerHTML = '';
+    self.entitaet_form('Katalog', ort, ort.name,
+      "data/tpl/form_ablageort.txt", '../api/store/Ablageort/',
+      '#ablageort-name', function() { 
         self.ablageort_liste();
-      });
-      self.addEvtListener('#cancel-btn', 'click', function () {
-        //document.querySelector(".zentraler-inhalt").innerHTML = '';
-        self.ablageort_liste();
-      });
-      self.addEvtListener('#loeschen-btn', 'click', function() {
-        var aoname = document.querySelector('#ablageort-name').value;
-        var dlgdata = {"del-elem": aoname};
-        self.dialog_laden_und_zeigen('data/tpl/dlg-loeschen.tpl', dlgdata, function() {
-          self.addEvtListener('#nein-btn', 'click', self.dialog_schliessen);
-          self.addEvtListener('#ja-btn', 'click', function() {
-            self.http_delete('../api/store/Ablageort/' + aoname, '', function (responseText) {
-              // hier die Antwort verarbeiten
-              self.dialog_schliessen();
-              //document.querySelector(".zentraler-inhalt").innerHTML = '';
-              self.ablageort_liste();
-            });
-          });
-        });
-      });
+    });
+  };
+  
+  /* ------------------------------- UI-Dynamik ----------------------- */
+  
+  self.reset_top_buttons = function() {
+    self.vorlage_laden_und_fuellen("data/tpl/top_btns.txt", '', function (html) {
+      document.querySelector(".top-btns").innerHTML = html;
+    });
+  };
+  
+  this.abspieler_auswahl_fuellen = function() {
+    self.http_get('../api/store/Abspieler/liste/', function (responseText) {
+      self.vorlage_laden_und_fuellen("data/tpl/abs_sel.txt", JSON.parse(responseText), function (html) {
+        document.querySelector(".abs-sel").innerHTML = html;
+      });    
     });
   };
 
-  this.addEvtListener = function (selector, eventName, func) {
-    var elems = document.querySelectorAll(selector);
-    var index;
-    for (index = 0; index < elems.length; index++) {
-      elems[index].addEventListener(eventName, func);
+  this.abspielliste_auswahl_fuellen = function() {
+    self.http_get('../api/store/Abspielliste/', function (responseText) {
+      self.vorlage_laden_und_fuellen("data/tpl/pl_sel.txt", JSON.parse(responseText), function (html) {
+        document.querySelector(".pl-sel").innerHTML = html;
+        self.addEvtListener('#playlist', 'change', function() {
+          self.titel_liste();
+        });
+      });    
+    });
+  };
+  
+  /* Unterer Einblendbereich */
+  
+  this.dialog_unten_zeigen = function() {
+    self.vorlage_laden_und_fuellen("data/tpl/ctrl.txt", "", function (html) {
+      var dlg = document.querySelector(".dialog-unten");
+      dlg.style.height = '4.5em';
+      dlg.innerHTML = html;
+      self.abspieler_auswahl_fuellen();
+      self.abspielliste_auswahl_fuellen();
+      self.addEvtListener('#dazu-btn', 'click', self.titelDazu);
+      self.addEvtListener('#play-btn', 'click', self.play);
+      self.addEvtListener('#stop-btn', 'click', function() {
+        self.kommando('stop');
+      });
+      self.addEvtListener('#pause-btn', 'click', function() {
+        self.kommando('pause');
+      });
+      self.addEvtListener('#weiter-btn', 'click', function() {
+        self.kommando('weiter');
+      });
+      
+/*
+    <button class="ctrl-btn ctrl-item" id="hier-btn" title="hier spielen"><i class="icon-tablet"></i></button>
+ */      
+      
+      self.addEvtListener('#weg-btn', 'click', self.titelWeg);
+      self.addEvtListener('#leeren-btn', 'click', self.alleTitelEntfernen);
+      self.media_liste();
+    });
+  };
+  
+  /* Titel einer Abspielliste */
+  
+  this.titel_liste = function() {
+    self.reset_top_buttons();
+    var plname = document.querySelector('#playlist').value;
+    document.querySelector('.bereich-name').textContent = 'Abspielliste ' + plname;
+    var bb = document.querySelector('.breadcrumb-behaelter');
+    bb.textContent = "";
+    self.http_get('../api/alist/' + plname, function (responseText) {
+      self.vorlage_laden_und_fuellen("data/tpl/titel_liste.txt", JSON.parse(responseText), function (html) {
+        document.querySelector(".zentraler-inhalt").innerHTML = html;
+        self.addEvtListener('.entity-eintrag', 'click', function (event) {
+          var t = event.target;
+          self.removeClassMulti('selected');
+          t.classList.add('selected');
+        });
+      });
+    });
+  };  
+  
+  /* ------------- Media-Steuerung ------------------------- */
+  
+  this.play = function() {
+    var bereichName = document.querySelector('.bereich-name').textContent;
+    if(bereichName === '') {
+      var titel = self.titelErmitteln(document.querySelector(".selected"));
+      //var titelName = elem.textContent;
+      /*
+      var titelName = elem.attributes.dateiName.nodeValue;
+      var album = elem.attributes.album.nodeValue;
+      var interpret = elem.attributes.interpret.nodeValue;
+      var anzName = elem.attributes.titelAnzName.nodeValue;
+      var titel;
+      if(self.mediaPfad.endsWith('/')) {
+        titel = new Titel(titelName, self.mediaPfad, self.ortPfad, interpret, anzName, album);
+      } else {
+        titel = new Titel(titelName, self.mediaPfad + '/', self.ortPfad, interpret, anzName, album);
+      }
+      */
+      var playername = document.querySelector('#abspieler').value;
+      /*      
+      HTTP POST /mz/api/strg/abspieler/play mit Titel im Body
+      
+      url: /media/test/M/Muenchener-Freiheit/01-Ohne-Dich-schlaf-ich-heut-Nacht-nicht-ein.mp3      
+      */
+      console.log('plname: ' + playername + ' url: ' + titel.katalogUrl + titel.pfad + titel.name);
+      self.http_post('../api/strg/' + playername + '/titel', JSON.stringify(titel), function(responseText) {
+        self.meldung_mit_timeout(responseText, 1500);
+      });   
+    } else if(bereichName === 'Livestream-Auswahl') {
+      var streamName = document.querySelector(".selected").textContent;
+      var playername = document.querySelector('#abspieler').value;
+      var stream = new Livestream(streamName, '-');
+      self.http_post('../api/strg/' + playername + '/stream', JSON.stringify(stream), function(responseText) {
+        self.meldung_mit_timeout(responseText, 1500);
+      });   
+    } else {
+      var abs = document.querySelector('#abspieler').value;
+      var lst = document.querySelector('#playlist').value;
+      console.log(
+        "play playlist.value: " + document.querySelector('#playlist').value + 
+        ", abspieler.value: " + document.querySelector('#abspieler').value);
+      self.http_get('../api/strg/' + abs + '/play/liste/' + lst, function(responseText) {
+        self.meldung_mit_timeout(responseText, 1500);
+      });
     }
   };
+  
+  this.kommando = function(kommando) {
+    var abs = document.querySelector('#abspieler').value;
+    self.http_get('../api/strg/' + abs + '/' + kommando, function(responseText) {
+      self.meldung_mit_timeout(responseText, 1500);
+    });
+  };
+    
+  /* ------------- Verwaltungsfunktionen Abspielliste -------------------- */
+  
+  self.alleTitelEntfernen = function() {
+    var plname = document.querySelector('#playlist').value;
+    self.http_delete('../api/alist/' + plname + '/alle', '', function(responseText) {
+      // DELETE	http://localhost:9090/mz/api/alist/liste1/0
+      //self.meldung_mit_timeout(responseText, 1500);
+      self.titel_liste();
+    });
+  };
+  
+  this.titelDazu = function() {
+    var titel = self.titelErmitteln(document.querySelector(".selected"));
+    //var titelName = elem.textContent;
+    /*
+    var titelName = elem.attributes.dateiName.nodeValue;
+    var album = elem.attributes.album.nodeValue;
+    var interpret = elem.attributes.interpret.nodeValue;
+    var anzName = elem.attributes.titelAnzName.nodeValue;
+    var titel;
+    if(self.mediaPfad.endsWith('/')) {
+      titel = new Titel(titelName, self.mediaPfad, self.ortPfad, interpret, anzName, album);
+    } else {
+      titel = new Titel(titelName, self.mediaPfad + '/', self.ortPfad, interpret, anzName, album);
+    }
+    */
+    var plname = document.querySelector('#playlist').value;
+    self.http_put('../api/alist/' + plname, JSON.stringify(titel), function(responseText) {
+      //self.meldung_mit_timeout(responseText, 1500);
+    });
+  };  
+  
+  this.titelWeg = function() {
+    var elem = document.querySelector(".selected");
+    var parentElem = elem.parentNode;
+    //console.log("elem: " + elem.nodeName + ", parent: " + parentElem.nodeName + ", len: " + parentElem.childNodes.length);
+    var liElems = parentElem.getElementsByTagName(elem.nodeName); // nur die LI Elemente
+    //console.log("liElems.anz: " + liElems.length);
+    var gefunden = false;
+    for(var i = 0; i < liElems.length && !gefunden; i++) {
+      //console.log(liElems.item(i).textContent);
+      if(liElems.item(i).classList.contains("selected")) {
+        gefunden = true;
+        var index = i;
+        //console.log(elem.textContent + ' hat Index ' + i);
+      }
+    }
+    // /mz/api/alist/[pl-name]/[nr] 
+    var plname = document.querySelector('#playlist').value;
+    self.http_delete('../api/alist/' + plname + '/' + index,'', function(responseText) {
+      // DELETE	http://localhost:9090/mz/api/alist/liste1/0
+      //self.meldung_mit_timeout(responseText, 1500);
+      self.titel_liste();
+    });
+    
+  };
+  
+  /* ------------- Helfer fuer Entitaets-Formulare ----------------------- */
+  
+  /*
+   * url: '../api/store/Ablageort/liste/'
+   * tpl: "data/tpl/ablageort_liste.txt"
+   * storeUrl: '../api/store/Ablageort/'
+   * formFunc: "self.ablageort_form"
+   * cb: etwas wie
+   *   function(responseText){
+   *     var ablageort = JSON.parse(responseText);
+   *     self.ablageort_form(ablageort);
+   *   });
+   */
+  this.entitaet_liste = function(bname, listUrl, tpl, storeUrl, formFunc, cb) {
+    self.reset_top_buttons();
+    document.querySelector('.bereich-name').textContent = bname;
+    var bb = document.querySelector('.breadcrumb-behaelter');
+    bb.textContent = "";
+    self.http_get(listUrl, function (responseText) {
+      self.vorlage_laden_und_fuellen(tpl, JSON.parse(responseText), function (html) {
+        document.querySelector(".zentraler-inhalt").innerHTML = html;
+        self.addEvtListener('.entity-eintrag', 'click', function (event) {
+          var t = event.target;
+          self.http_get(storeUrl + t.textContent, cb);
+        });
+        //self.addEvtListener('#neu-btn', 'click', function (event) {
+        self.addEvtListener('#top-neu-btn', 'click', function(event) {
+          eval(formFunc + "(this)");
+        });        
+      });
+    });
+  };  
+      
+  /*
+   * dat: gefuelltes Datenobjekt bei Aenderung
+   * key: der alte schluesselbegriff bei Aenderung (z.B. al.name)
+   * tpl: "data/tpl/form_abspielliste.txt"
+   * url: '../api/store/Abspielliste/'
+   * selector: '#abspielliste-name'
+   * cbOk: etwas wie
+   *    function() {
+   *       self.abspielliste_auswahl_fuellen();
+   *       self.abspielliste_liste();
+   *     });
+   * delSelector: '#abspielliste-name'
+   * cbDel: etwas wie
+   *    function() {
+   *       self.abspielliste_auswahl_fuellen();
+   *       self.abspielliste_liste();
+   *     });
+   */
 
-  /* asynchroner HTTP Client */
+  this.entitaet_form = function(bname, dat, key, tpl, url, selector, cb) {
+    document.querySelector('.bereich-name').textContent = bname;
+    self.vorlage_laden_und_fuellen(tpl, dat, function (html) {
+      document.querySelector(".zentraler-inhalt").innerHTML = html;
+      const form = document.querySelector('form');      
+      form.addEventListener('submit', function(event) {
+        self.handle_submit(event, key, url, selector, cb);
+      });
+      self.addEvtListener('#cancel-btn', 'click', cb);
+      self.addEvtListener('#loeschen-btn', 'click', function(event) {
+        event.preventDefault();
+        self.handle_del_btn(selector, url, cb);
+      });
+    });
+  };
+  
+  /*
+   * existingKey: wenn die Entitaet existiert und geandert werden soll
+   *                 leer, wenn neue Entitaet 
+   */
+  this.handle_submit = function(event, existingKey, putUrl, keySelector, cb) {
+    event.preventDefault();
+    console.log('handle submit, key: ' + event.target.id);
+    const data = new FormData(event.target);
+    const value = Object.fromEntries(data.entries());
+    //console.log({ value });
+    //console.log(JSON.stringify(value));
+    var daten = JSON.stringify(value);
+    var formkey = document.querySelector(keySelector).value;
+    formkey = formkey.replace(' ', '').replace(/[\W]+/g, '');
+    if(typeof existingKey === "undefined" ||  existingKey.length < 1) {
+      // neu
+      self.http_put(putUrl + formkey, daten, function (responseText) {
+        if(typeof(cb) !== 'function') {
+          // ..
+        } else {
+          cb();
+        }
+      });
+    } else {
+      // aendern
+      self.http_put(putUrl + existingKey, daten, function (responseText) {
+        if(typeof(cb) !== 'function') {
+          // ..
+        } else {
+          cb();
+        }
+      });
+    }
+  };
+  
+  this.handle_del_btn = function(selectorKey, delUrl, cb) {
+    var pkey = document.querySelector(selectorKey).value;
+    var dlgdata = {"del-elem": pkey};
+    self.dialog_laden_und_zeigen('data/tpl/dlg-loeschen.txt', dlgdata, function() {
+      self.addEvtListener('#nein-btn', 'click', self.dialog_schliessen);
+      self.addEvtListener('#ja-btn', 'click', function(event) {
+        //console.log("loeschen geklickt.");
+        self.http_delete(delUrl + pkey, '', function (responseText) {
+          self.dialog_schliessen();
+          if(typeof(cb) !== 'function') {
+            // ..
+          } else {
+            cb();
+          }
+        });
+      });
+    });    
+  };  
+  
+  /* ------------------ sonstige Helfer ----------------------- */
+      
+  this.addEvtListener = function(selector, eventName, func) {
+    document.querySelectorAll(selector).forEach(elem => { elem.addEventListener(eventName, func); });
+  };
+  
+  this.removeClassMulti = function(selector) {
+    document.querySelectorAll('.' + selector).forEach(elem => { elem.classList.remove(selector); });
+  };
+  
+  self.titelErmitteln = function(elem) {
+    var titelName = elem.attributes.dateiName.nodeValue;
+    var album = elem.attributes.album.nodeValue;
+    var interpret = elem.attributes.interpret.nodeValue;
+    var anzName = elem.attributes.titelAnzName.nodeValue;
+    var titel;
+    if(self.mediaPfad.endsWith('/')) {
+      titel = new Titel(titelName, self.mediaPfad, self.ortPfad, interpret, anzName, album);
+    } else {
+      titel = new Titel(titelName, self.mediaPfad + '/', self.ortPfad, interpret, anzName, album);
+    }
+    return titel;
+  };
+
+  /* --------------------- asynchroner HTTP Client ----------------- */
   
   this.http_get = function (u, cb) {
     self.http_call('GET', u, null, cb);
@@ -161,7 +641,7 @@
   };
   
   this.http_delete = function (u, data, cb) {
-    console.log("delete " + u);
+    // console.log("delete " + u);
     self.http_call('DELETE', u, data, cb);
   };
   
@@ -181,30 +661,8 @@
       xhr.send(data);
     }
   };
-
-  /* ab hier aus App-Vorlage */
-
-  this.init = function () {
-    //self.vorlagen = new Vorlagen();
-    self.mediaPfad = '/';
-    self.ortPfad = '/';
-    self.cache = new Array();
-    self.appMenu = new AppMenu();
-    self.appMenu.init(
-            "data/menu/",
-            "hauptmenue.json",
-            "data/tpl/app-menu.tpl",
-            ".west",
-            "8em");
-
-    document.querySelector('.hamburger').addEventListener('click', function (e) {
-      self.menue_umschalten();
-    });
-    
-    self.fusszeile_umschalten();
-    self.seitenleiste_umschalten();
-
-  };
+  
+  /* ------------------------ aus App-Vorlage -------------------  */
 
   this.menue_umschalten = function () {
     var ham = document.querySelector(".hamburger");
@@ -213,7 +671,7 @@
   };
 
   this.info_dialog_zeigen = function () {
-    self.dialog_laden_und_zeigen('data/tpl/dlg-info.tpl', '');
+    self.dialog_laden_und_zeigen('data/tpl/dlg-info.txt', '');
     self.menue_umschalten();
   };
 
@@ -280,8 +738,8 @@
       }, 500);
     }, timeout);
   };
-
-  /* Dialog-Funktionen */
+  
+  /* --------------------- Dialog-Funktionen ------------------------ */
 
   /*
    Einen Dialog aus Vorlagen erzeugen
@@ -315,14 +773,14 @@
     });
   };
   
-  self.dialog_schliessen = function () {
+  this.dialog_schliessen = function () {
     document.querySelector('.close-btn').removeEventListener('click', self.dialog_schliessen);
     var dlg = document.querySelector('.dialog');
     dlg.style.height = '0';
     dlg.innerHTML = '';
   };
 
-  /* Vorlagen */
+  /* ---------------------   Vorlagen   ---------------------- */
 
   /*
    Das HTML erzeugen, das entsteht, wenn eine Vorlage mit Inhalt
@@ -376,3 +834,45 @@
 
 }
 
+/* ----------- Objekte ---------------- */
+
+function Ablageort(n, o, u) {
+  this.name = n;
+  this.ort = o;
+  this.url = u;
+}
+
+function Einstellung(k, v) {
+  this.key = k;
+  this.value = v;
+}
+
+function Abspieler(n, u) {
+  this.name = n;
+  this.url = u;
+}
+
+function Livestream(n, u) {
+  this.name = n;
+  this.url = u;
+}
+
+function Abspielliste(n) {
+  this.name = n;
+}
+
+function Titel(n, p, u, i, t, a) {
+  this.katalogUrl = u;
+  this.pfad = p;
+  this.name = n;
+  this.interpret = i;
+  this.titelAnzName = t;
+  this.album  = a;
+}
+
+function Geraet(n, e, a, s) {
+  this.name = n;
+  this.einUrl = e;
+  this.ausUrl = a;
+  this.statusUrl = s;
+}
\ No newline at end of file

--
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