scinote-web/app/assets/javascripts/assets.js

83 lines
2.2 KiB
JavaScript
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2016-07-21 19:11:15 +08:00
function setupAssetsLoading() {
var DELAY = 2000;
var REPETITIONS = 15;
function refreshAssets() {
var elements = $("[data-status='asset-loading']");
if (!elements.length) {
return false;
}
$.each(elements, function(_, el) {
var $el = $(el);
var spinner = $el.find(".asset-loading-spinner");
var type = $el.data("type");
// Perform an AJAX call to present URL
// to check if file already exists
$.ajax({
url: $el.data("present-url"),
type: "GET",
dataType: "json",
success: function (data) {
$el.attr("data-status", "asset-loaded");
$el.find(".asset-loading-spinner").spin(false);
$el.html("");
if (type === "image") {
$el.html(
"<a href='" + $el.data("download-url") + "'>" +
"<img src='" + $el.data("preview-url") + "'><br>" +
$el.data("filename") + "</a>"
);
} else {
$el.html(
"<a href='" + $el.data("download-url") + "'>" +
$el.data("filename") + "</a>"
);
}
},
error: function (ev) {
if (ev.status == 403) {
// Image/file exists, but user doesn't have
// rights to download it
if (type === "image") {
$el.html(
"<img src='" + $el.data("preview-url") + "'><br>" +
$el.data("filename")
);
} else {
$el.html($el.data("filename"));
}
} else {
// Do nothing, file is not yet present
}
}
});
});
return true;
}
function finalizeAssets() {
var elements = $("[data-status='asset-loading']");
$.each(elements, function(_, el) {
var $el = $(el);
$el.attr("data-status", "asset-failed");
$el.find(".asset-loading-spinner").spin(false);
$el.html($el.data("filename"));
});
}
var cntr = 0;
var intervalId = window.setInterval(function() {
cntr++;
if (cntr >= REPETITIONS || !refreshAssets()) {
finalizeAssets();
window.clearInterval(intervalId);
}
}, DELAY);
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}