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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
const { Task } = require("devtools/shared/task");
const { executeSoon, isGenerator, reportException } = require("devtools/shared/DevToolsUtils");
const ERROR_TYPE = exports.ERROR_TYPE = "@@redux/middleware/task#error";
/**
* A middleware that allows generator thunks (functions) and promise
* to be dispatched. If it's a generator, it is called with `dispatch`
* and `getState`, allowing the action to create multiple actions (most likely
* asynchronously) and yield on each. If called with a promise, calls `dispatch`
* on the results.
*/
function task({ dispatch, getState }) {
return next => action => {
if (isGenerator(action)) {
return Task.spawn(action.bind(null, dispatch, getState))
.then(null, handleError.bind(null, dispatch));
}
/*
if (isPromise(action)) {
return action.then(dispatch, handleError.bind(null, dispatch));
}
*/
return next(action);
};
}
function handleError(dispatch, error) {
executeSoon(() => {
reportException(ERROR_TYPE, error);
dispatch({ type: ERROR_TYPE, error });
});
}
exports.task = task;
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