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69 lines
1.6 KiB
JavaScript
69 lines
1.6 KiB
JavaScript
let _cache = {};
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export function lookupCachedUploadUrl(shortUrl) {
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return _cache[shortUrl];
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}
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export function lookupUncachedUploadUrls(urls, ajax) {
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return ajax("/uploads/lookup-urls", {
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method: "POST",
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data: { short_urls: urls }
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}).then(uploads => {
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uploads.forEach(upload =>
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cacheShortUploadUrl(upload.short_url, upload.url)
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);
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urls.forEach(url =>
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cacheShortUploadUrl(url, lookupCachedUploadUrl(url) || "missing")
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);
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return uploads;
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});
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}
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export function cacheShortUploadUrl(shortUrl, url) {
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_cache[shortUrl] = url;
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}
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export function resetCache() {
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_cache = {};
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}
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function _loadCachedShortUrls($images) {
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$images.each((idx, image) => {
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const $image = $(image);
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const url = lookupCachedUploadUrl($image.data("orig-src"));
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if (url) {
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$image.removeAttr("data-orig-src");
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if (url !== "missing") {
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$image.attr("src", url);
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}
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}
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});
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}
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function _loadShortUrls($images, ajax) {
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const urls = $images.toArray().map(img => $(img).data("orig-src"));
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return lookupUncachedUploadUrls(urls, ajax).then(() =>
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_loadCachedShortUrls($images)
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);
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}
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export function resolveAllShortUrls(ajax) {
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let $shortUploadUrls = $("img[data-orig-src]");
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if ($shortUploadUrls.length > 0) {
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_loadCachedShortUrls($shortUploadUrls);
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$shortUploadUrls = $("img[data-orig-src]");
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if ($shortUploadUrls.length > 0) {
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// this is carefully batched so we can do a leading debounce (trigger right away)
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return Ember.run.debounce(
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null,
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() => _loadShortUrls($shortUploadUrls, ajax),
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450,
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true
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);
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}
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}
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}
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