From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001 From: "Matt A. Tobin" Date: Fri, 2 Feb 2018 04:16:08 -0500 Subject: Add m-esr52 at 52.6.0 --- devtools/client/shared/redux/middleware/task.js | 42 +++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 devtools/client/shared/redux/middleware/task.js (limited to 'devtools/client/shared/redux/middleware/task.js') diff --git a/devtools/client/shared/redux/middleware/task.js b/devtools/client/shared/redux/middleware/task.js new file mode 100644 index 000000000..c1dd262ee --- /dev/null +++ b/devtools/client/shared/redux/middleware/task.js @@ -0,0 +1,42 @@ +/* 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; -- cgit v1.2.3