#target photoshop

app.displayDialogs = DialogModes.NO;

var openedDocument = null;

function readJson(filePath) {
  var file = File(filePath);
  if (!file.exists) {
    throw new Error('Manifest does not exist: ' + filePath);
  }
  file.encoding = 'UTF8';
  if (!file.open('r')) {
    throw new Error('Unable to open manifest: ' + filePath);
  }
  var content = file.read();
  file.close();
  return eval('(' + content + ')');
}

try {
  var manifest = readJson(JIAPU_A01_MANIFEST);
  var psdFile = File(JIAPU_A01_PSD);
  if (!psdFile.exists) {
    throw new Error('PSD does not exist: ' + psdFile.fsName);
  }
  openedDocument = app.open(psdFile);
  if (manifest.exports.length !== 0) {
    throw new Error('Layer export is not implemented until assets are approved.');
  }
  openedDocument.close(SaveOptions.DONOTSAVECHANGES);
  openedDocument = null;
} catch (error) {
  if (openedDocument !== null) {
    openedDocument.close(SaveOptions.DONOTSAVECHANGES);
  }
  throw error;
}