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<!DOCTYPE html>
<html>
<script>
function selectedPlaylistId()
{
var children = document.getElementById("playlists").children;
for (var i = 0; i < children.length; i++) {
if (children[i].classList.contains("selected")) {
return children[i].getAttribute("id");
}
}
return null;
}
function allowDrop(event)
{
event.preventDefault();
}
function makePlaylistEntry(name, cpl_id)
{
var li = document.createElement("li");
li.appendChild(document.createTextNode(name));
li.id = cpl_id;
li.onclick = function() {
li.classList.toggle("selected");
updatePlaylist();
};
li.ondrop = function(event) {
event.preventDefault();
var playlistElement = document.getElementById('playlist');
newLi = makePlaylistEntry(event.dataTransfer.getData("name"), event.dataTransfer.getData("cpl-id"));
var beforeElement = null;
if (event.offsetY > event.target.clientHeight / 2) {
beforeElement = event.target.nextSibling;
} else {
beforeElement = event.target;
}
playlistElement.insertBefore(newLi, beforeElement);
var beforeId = null;
if (beforeElement) {
beforeId = beforeElement.getAttribute("id");
}
fetch("/api/v1/playlist/" + playlistElement.getAttribute('playlist-id') + "/insert", {
method: "POST",
body: JSON.stringify({before: beforeId, digest: event.dataTransfer.getData("digest")}),
headers: {
"Content-type": "application/json; charset=UTF-8"
}
});
};
li.ondragover = "allowDrop(event)";
return li;
}
// Update the displayed playlist (in ul id="playlist")
function updatePlaylist()
{
var playlistId = selectedPlaylistId();
if (playlistId != null) {
fetch("/api/v1/playlist/" + playlistId).then(response => {
response.json().then(data => {
var playlistContents = document.getElementById("playlist");
playlistContents.setAttribute("playlist-id", playlistId);
playlistContents.innerHTML = "";
data.content.forEach(content => {
var li = makePlaylistEntry(content['name'], content['cpl-id'])
playlistContents.appendChild(li);
});
});
});
}
}
function setSelectedPlaylist(id)
{
var children = document.getElementById("playlists").children;
for (var i = 0; i < children.length; i++) {
var child = children[i];
if (child.getAttribute("id") == id) {
child.classList.add("selected");
} else {
child.classList.remove("selected");
}
}
};
// Fetch playlists and make the list
fetch("/api/v1/playlists").then(response => {
response.json().then(data => {
data.forEach(playlist => {
var li = document.createElement("li");
li.appendChild(document.createTextNode(playlist.name));
li.id = playlist['id'];
li.onclick = function() {
setSelectedPlaylist(playlist['id']);
updatePlaylist();
};
document.getElementById('playlists').appendChild(li);
});
});
});
// Fetch content and make the list
fetch("/api/v1/content").then(response => {
response.json().then(data => {
data.forEach(content => {
var li = document.createElement("li");
li.appendChild(document.createTextNode(content.name));
li.id = content['cpl-id'];
li.draggable = "true";
li.ondragstart = function(event) {
event.dataTransfer.setData("cpl-id", content['cpl-id']);
event.dataTransfer.setData("name", content['name']);
event.dataTransfer.setData("digest", content['digest']);
};
document.getElementById('content').appendChild(li);
});
});
})
</script>
<style>
ul#playlists {
width: 400px;
}
ul#playlist {
width: 400px;
}
li {
border: 1px solid black;
background-color: #a7bad9;
padding: 3px;
list-style-type: none;
cursor: pointer;
}
li.selected {
background-color: #d343e0;
cursor: pointer;
}
</style>
<head>
<title>Playlists</title>
</head>
<body>
<div style="width: 50%; display: inline-block;">
<p>Playlists:
<ul id="playlists">
</ul>
<p>Playlist:
<ul id="playlist" ondragover="allowDrop(event)">
</ul>
</div>
<div style="float: right;">
<p>Content:
<ul id="content">
</ul>
</div>
</body>
</html>
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