Initial test and source

.babelrc

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+{
+   "presets": ["es2015", "stage-2"]
+}

.eslintignore

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+**/dist/*
+**/node_modules/*
+**/server.js
+**/webpack.config*.js

.eslintrc

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+{
+  "extends": "rackt",
+  "rules": {
+    "valid-jsdoc": 2,
+    // Disable until Flow supports let and const
+    "no-var": 0,
+    "react/jsx-uses-react": 1,
+    "react/jsx-no-undef": 2,
+    "react/wrap-multilines": 2
+  },
+  "plugins": [
+    "react"
+  ]
+}

.gitignore

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+.DS_Store
+*.log
+*.sw?
+node_modules
+dist
+lib
+coverage
+_book

LICENSE.md

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+The MIT License (MIT)
+
+Copyright (c) 2015 Dan Abramov
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

package.json

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+{
+  "name": "redux-reactions",
+  "version": "0.1.0",
+  "description": "reactions library for redux",
+  "main": "index.js",
+  "scripts": {
+    "test": "mocha --compilers js:babel-register --recursive",
+    "lint": "eslint src test examples",
+    "check": "npm run lint && npm run test",
+    "build:lib": "babel src --out-dir lib",
+    "build:umd": "webpack src/index.js dist/redux.js --config webpack.config.development.js",
+    "build:umd:min": "webpack src/index.js dist/redux.min.js --config webpack.config.production.js",
+    "build": "npm run build:lib && npm run build:umd && npm run build:umd:min"
+  },
+  "author": "Winston Ewert <winstonewert@gmail.com>",
+  "license": "MIT",
+  "devDependencies": {
+    "babel-cli": "^6.3.17",
+    "babel-core": "^6.3.26",
+    "babel-eslint": "^5.0.0-beta6",
+    "babel-loader": "^6.2.1",
+    "babel-preset-es2015": "^6.3.13",
+    "babel-preset-stage-2": "^6.3.13",
+    "babel-register": "^6.3.13",
+    "eslint": "^1.10.3",
+    "eslint-config-rackt": "^1.1.1",
+    "eslint-plugin-react": "^3.14.0",
+    "mocha": "^2.3.4",
+    "redux": "^3.0.5"
+  }
+}

src/index.js

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+export function startReactions(store, reactions, taskTypes) {
+  function updateReactions() {
+    for (var reaction of reactions(store.getState())) {
+      if (reaction) {
+        taskTypes[reaction.type](undefined, () => store.dispatch({ type: 'FINISH' }))
+      }
+    }
+  }
+
+  store.subscribe(updateReactions)
+}

test/.eslintrc

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+{
+  "env": {
+    "mocha": true
+  }
+}

test/startReactions.spec.js

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+import { createStore } from 'redux'
+import { strictEqual, deepEqual } from 'assert'
+import { startReactions } from '../src'
+
+describe('startReactions', () => {
+  it('applies reactions', () => {
+
+    function reducer(state = { started: false, finished: false }, action) {
+      switch (action.type) {
+        case 'START':
+          return { ...state, started: true }
+        case 'FINISH':
+          return { ...state, finished: true }
+        default:
+          return state
+      }
+    }
+    var store = createStore(reducer)
+
+    function reactions(state) {
+      return [
+        state.started && !state.finished && { type: 'TASK', events: { finished: () => {type: 'FINISH'} } }
+      ]
+    }
+
+    var waiting = []
+
+    function taskImplementation(details, emitter) {
+      waiting.push(() => emitter('FINISH'))
+    }
+
+    startReactions(store, reactions,{ TASK: taskImplementation })
+
+    strictEqual(waiting.length, 0)
+    deepEqual(store.getState(), { started: false, finished: false })
+
+    store.dispatch({ type: 'START' })
+
+    strictEqual(waiting.length, 1)
+    deepEqual(store.getState(), { started: true, finished: false })
+
+    waiting[0]()
+
+    strictEqual(waiting.length, 1)
+    deepEqual(store.getState(), { started: true, finished: true })
+  })
+})

webpack.config.base.js

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+'use strict';
+
+module.exports = {
+  module: {
+    loaders: [
+      { test: /\.js$/, loaders: ['babel-loader'], exclude: /node_modules/ }
+    ]
+  },
+  output: {
+    library: 'Redux',
+    libraryTarget: 'umd'
+  },
+  resolve: {
+    extensions: ['', '.js']
+  }
+};

webpack.config.development.js

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+'use strict';
+
+var webpack = require('webpack');
+var baseConfig = require('./webpack.config.base');
+
+var config = Object.create(baseConfig);
+config.plugins = [
+  new webpack.optimize.OccurenceOrderPlugin(),
+  new webpack.DefinePlugin({
+    'process.env.NODE_ENV': JSON.stringify('development')
+  })
+];
+
+module.exports = config;

webpack.config.production.js

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+'use strict';
+
+var webpack = require('webpack');
+var baseConfig = require('./webpack.config.base');
+
+var config = Object.create(baseConfig);
+config.plugins = [
+  new webpack.optimize.OccurenceOrderPlugin(),
+  new webpack.DefinePlugin({
+    'process.env.NODE_ENV': JSON.stringify('production')
+  }),
+  new webpack.optimize.UglifyJsPlugin({
+    compressor: {
+      screw_ie8: true,
+      warnings: false
+    }
+  })
+];
+
+module.exports = config;