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// python3 -m http.server
const data_dir = 'data';
//const index_file = "pmsl_t850.index.json";
const index_file = "index.json";
var index = null;
var product_index = null;
var mapframe = null;
function httpGetAsync(url, callback)
{
var xmlHttp = new XMLHttpRequest();
xmlHttp.onreadystatechange = function() {
if (xmlHttp.readyState == 4 && xmlHttp.status == 200)
callback(xmlHttp.responseText);
}
xmlHttp.open("GET", url, true);
xmlHttp.send(null);
}
function loadIndexFromJson(raw_text) {
index_obj = JSON.parse(raw_text)
//TODO pass index here. that would be cleaner than public vars.
build_interface(index_obj);
}
function build_indexlist(index_obj) {
//if (index_obj==null) {
// return;
//}
div = document.createElement('div');
div.classList.add('index');
list = document.createElement('ul');
for (const i in index_obj) {
var map = index_obj[i];
a = document.createElement('a');
a.classList.add('link');
a.setAttribute('href', '');// data_dir + '/' + map.file);
a.setAttribute('mapfile', map.file);
a.onclick = indexlink_click;
a.innerText = map.valid_offset;
a.id = map.file;
li = document.createElement('li');
li.appendChild(a);
list.appendChild(li);
}
div.appendChild(list);
return div;
}
function indexlink_click(e) {
mapframe.querySelector('#mapframe').src = data_dir + '/' + this.getAttribute('mapfile');
return false;
}
function productlink_click(e) {
clear_interface();
httpGetAsync(data_dir + '/' + this.getAttribute('indexfile'), loadIndexFromJson);
return false;
}
function build_mapframe() {
div = document.createElement('div');
div.classList.add('mapframe');
frame = document.createElement('img');
frame.id = 'mapframe';
//frame.classList.add('mapframe');
mapframe = frame;
div.appendChild(frame);
return div;
}
function build_interface(index_obj) {
index = build_indexlist(index_obj);
mapframe = build_mapframe();
document.body.appendChild(index);
document.body.appendChild(mapframe);
}
function clear_interface() {
if (index)
index.remove();
if(mapframe)
mapframe.remove();
}
function build_product_index(raw_text) {
product_index = JSON.parse(raw_text);
div = document.createElement('div');
div.classList.add('product_index');
list = document.createElement('ul');
for (const i in product_index) {
var product = product_index[i];
a = document.createElement('a');
a.classList.add('link');
a.setAttribute('href', '');// data_dir + '/' + map.file);
a.setAttribute('indexfile', product.indexfile);
a.onclick = productlink_click;
a.innerText = product.name;
a.id = product.indexfile;
li = document.createElement('li');
li.appendChild(a);
list.appendChild(li);
}
div.appendChild(list);
document.body.appendChild(div);
}
window.onload = function() {
//httpGetAsync(data_dir + '/' + index_file, loadIndexFromJson);
httpGetAsync(data_dir + '/' + index_file, build_product_index);
}
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