b38dea0597
Share Gaia assets and adapters, keep private profiles and development documents local, and update both public READMEs.
65 lines
1.6 KiB
JavaScript
Executable file
65 lines
1.6 KiB
JavaScript
Executable file
'use strict';
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/* exported enumerateAll */
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// With the removal of composite storage, this function emulates
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// the composite storage enumeration (i.e. return files from
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// all of the storage areas).
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function enumerateAll(storages, dir, options) {
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var storageIndex = 0;
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var ds_cursor = null;
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var cursor = {
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continue: function cursor_continue() {
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ds_cursor.continue();
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}
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};
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function onsuccess(e) {
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cursor.result = e.target.result;
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if (!cursor.result) {
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storageIndex++;
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if (storageIndex < storages.length) {
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enumerateNextStorage();
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return;
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}
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// If we've run out of storages, then we fall through and call
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// onsuccess with the null result.
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}
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if (cursor.onsuccess) {
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try {
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cursor.onsuccess(e);
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} catch (err) {
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console.warn('enumerateAll onsuccess threw', err);
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}
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}
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}
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function onerror(e) {
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cursor.error = e.target.error;
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if (cursor.error.name === 'NotFoundError' &&
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storageIndex !== storages.length - 1) {
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storageIndex++;
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enumerateNextStorage();
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return;
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}
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if (cursor.onerror) {
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try {
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cursor.onerror(e);
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} catch (err) {
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console.warn('enumerateAll onerror threw', err);
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}
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}
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}
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function enumerateNextStorage() {
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// The || {} on the next line is required to make enumerate work properly
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// on v1-train.
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ds_cursor = storages[storageIndex].enumerate(dir, options || {});
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ds_cursor.onsuccess = onsuccess;
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ds_cursor.onerror = onerror;
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}
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enumerateNextStorage();
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return cursor;
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}
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