Function computeInMasterFrame

3p/3p.js:172–196

(global, taskId, work, cb)

 *     done. The first argument is the result.
 */
export function computeInMasterFrame(global, taskId, work, cb) {
  const {master} = global.context;
  let tasks = master.__ampMasterTasks;
  if (!tasks) {
    tasks = master.__ampMasterTasks = {};
  }
  let cbs = tasks[taskId];
  if (!tasks[taskId]) {
    cbs = tasks[taskId] = [];
  }
  cbs.push(cb);
  if (!global.context.isMaster) {
    return; // Only do work in master.
  }
  work((result) => {
    for (let i = 0; i < cbs.length; i++) {
      cbs[i].call(null, result);
    }
    tasks[taskId] = {
      push(cb) {
        cb(result);
      },
    };
  });
}

/**
 * Validates given data. Throws an exception if the data does not