misuzu/assets/js/misuzu/uiharu.js

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const Uiharu = function(apiUrl) {
const maxBatchSize = 5;
const lookupOneUrl = apiUrl + '/metadata',
lookupManyUrl = apiUrl + '/metadata/batch';
const lookupManyInternal = function(targetUrls, callback) {
const formData = new FormData;
for(const url of targetUrls)
formData.append('url[]', url);
const xhr = new XMLHttpRequest;
xhr.addEventListener('load', function() {
callback(JSON.parse(xhr.responseText));
});
xhr.addEventListener('error', function(ev) {
callback({ status: xhr.status, error: 'xhr', details: ev });
});
xhr.open('POST', lookupManyUrl);
xhr.send(formData);
};
return {
lookupOne: function(targetUrl, callback) {
if(typeof callback !== 'function')
throw 'callback is missing';
targetUrl = (targetUrl || '').toString();
if(targetUrl.length < 1)
return;
const xhr = new XMLHttpRequest;
xhr.addEventListener('load', function() {
callback(JSON.parse(xhr.responseText));
});
xhr.addEventListener('error', function() {
callback({ status: xhr.status, error: 'xhr', details: ex });
});
xhr.open('POST', lookupOneUrl);
xhr.send(targetUrl);
},
lookupMany: function(targetUrls, callback) {
if(!Array.isArray(targetUrls))
throw 'targetUrls must be an array of urls';
if(typeof callback !== 'function')
throw 'callback is missing';
if(targetUrls < 1)
return;
if(targetUrls.length <= maxBatchSize) {
lookupManyInternal(targetUrls, callback);
return;
}
for(let i = 0; i < targetUrls.length; i += maxBatchSize)
lookupManyInternal(targetUrls.slice(i, i + maxBatchSize), callback);
},
};
};