kahuna/public/js/services/api/loader.js

import angular from 'angular';
import {mediaApi} from './media-api';

export var loaderApi = angular.module('kahuna.services.api.loader', [
    mediaApi.name
]);

loaderApi.factory('loaderApi', ['mediaApi', function(mediaApi) {

    var loaderRoot;

    function getLoaderRoot() {
        if (! loaderRoot) {
            loaderRoot = mediaApi.root.follow('loader');
        }
        return loaderRoot;
    }

    function prepare(mediaIdToFilenameMap) {
        return getLoaderRoot().follow('prepare').post(mediaIdToFilenameMap);
    }

   async function getUploadsByCurrentUser() {
      return getLoaderRoot().follow('uploadStatuses').get();
    }

    function load(imageData, uploadInfo) {
        const options = {
            // We could get the guessed mime-type from the File, but
            // it could be wrong, so might as well just send as data
            headers: {'Content-Type': 'application/octet-stream'},
            // Skip angular's default JSON-converting transform
            transformRequest: []
        };
        return getLoaderRoot().
            follow('load', uploadInfo).post(imageData, options);
    }

    function import_(uri, identifiersMap = {}) {
        const identifiers = JSON.stringify(identifiersMap);
        return getLoaderRoot().
            follow('import', {uri, identifiers}).post();
    }

    return {
        getLoaderRoot,
        prepare,
        load,
        getUploadsByCurrentUser,
        import: import_
    };
}]);