62 lines
2.2 KiB
JavaScript
62 lines
2.2 KiB
JavaScript
/**
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* Retrieves metaData for multiple studies at once.
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*
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* This function calls getStudyMetadata several times, asynchronously,
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* and waits for all of the results to be returned.
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*
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* @param studyInstanceUids The UIDs of the Studies to be retrieved
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* @param doneCallback The callback function to be executed when the study retrieval has finished
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* @param failCallback The callback function to be executed when the study retrieval has failed
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*/
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getStudiesMetadata = function(studyInstanceUids, doneCallback, failCallback) {
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// Check to make sure studyInstanceUids were actually input
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if (!studyInstanceUids || !studyInstanceUids.length) {
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if (failCallback && typeof failCallback === 'function') {
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failCallback('No studyInstanceUids were input');
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}
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return;
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}
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// Create an empty array to store the Promises for each metaData
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// retrieval call
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var promises = [];
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// Create an empty array to hold all the results of the promises
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var studies = [];
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// Loop through the array of studyInstanceUids
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studyInstanceUids.forEach(function(studyInstanceUid) {
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// Create a new Deferred to monitor the progress of the asynchronous
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// metaData retrieval
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var deferred = new $.Deferred();
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// Send the call, and attach doneCallbacks and failCallbacks
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// which can resolve or reject the related promise based on its outcome
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getStudyMetadata(studyInstanceUid, function(study) {
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deferred.resolve(study);
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}, function(error) {
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deferred.reject(error);
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});
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// Add the current promise to the array of promises
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promises.push(deferred.promise());
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});
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// When all of the promises are complete, this callback runs
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$.when.apply($, promises).done(function() {
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// Convert the Arguments Array-like Object to an actual array
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var studies = $.makeArray(arguments);
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// Pass the studies array to the doneCallback, if one exists
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if (doneCallback && typeof doneCallback === 'function') {
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doneCallback(studies);
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}
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}).fail(function(error) {
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log.warn(error);
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if (failCallback && typeof failCallback === 'function') {
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failCallback(error);
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}
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});
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}; |