Add duck battlecry generator (erikras#74)

README.md

@@ -103,6 +103,18 @@ bindActionCreators({loadWidgets, createWidget, updateWidget, removeWidget}, disp
 
 [Todomvc using ducks.](https://github.com/goopscoop/ga-react-tutorial/tree/6-reduxActionsAndReducers)
 
+### BattleCry generators
+
+There are configurable [BattleCry](https://github.com/pedsmoreira/battlecry) generators ready to be downloaded and help scaffolding ducks:
+
+```sh
+npm install -g battlecry
+cry download erikras/ducks-modular-redux
+cry init duck
+```
+
+Run `cry --help` to check more info about the generators available;
+
 ### Implementation
 
 The migration to this code structure was [painless](https://github.com/erikras/react-redux-universal-hot-example/commit/3fdf194683abb7c40f3cb7969fd1f8aa6a4f9c57), and I foresee it reducing much future development misery.

battlecry/generators/duck/duck.generator.js

@@ -0,0 +1,77 @@
+import { Generator, File, namedCasex, casex, log } from 'battlecry';
+
+const CONFIG_FILE = 'configureStore.js';
+const REDUX_PATH = 'src/redux';
+
+export default class DuckGenerator extends Generator {
+  config = { 
+    init: {
+      description: 'Create configStore.js file and an example duck'
+    },
+    generate: {
+      args: 'name ...actions?',
+      description: 'Create or modify duck to add actions'
+    }
+  };
+
+  get configFile() {
+    const template = this.template(CONFIG_FILE);
+    const path = `${REDUX_PATH}/${template.filename}`;
+
+    return new File(path);
+  }
+
+  get actions() {
+    return (this.args.actions || ['set']).reverse();
+  }
+
+  init() {
+    const configFile = this.configFile;
+    if(configFile.exists) return log.warn(`Modular ducks have already been initiated. Please check the ${configFile.path} file`);
+
+    this.template(CONFIG_FILE).saveAs(configFile.path);
+    this.generator('duck').setArgs({name: 'todo'}).play('generate');
+  }
+
+  generate() {
+    this.addActionsToDuck();
+    this.addDuckToConfig();
+  }
+
+  addActionsToDuck() {
+    const template = this.template('_*');
+    const path = `${REDUX_PATH}/modules/${template.filename}`;
+
+    let file = new File(path, this.args.name);
+    if(!file.exists) file = template;
+
+    this.actions.forEach(action => {
+      file.after('// Actions', `const __NA_ME__ = '${casex(this.args.name, 'na-me')}/__NA-ME__';`, action);
+
+      file.after('switch (action.type) {', [
+        '    case __NA_ME__:',
+        '      // Perform action',
+        '      return state;'
+      ], action);
+
+      file.after('// Action Creators', [
+        namedCasex('export function __naMe__() {', + `${action}_${this.args.name}`),
+        '  return { type: __NA_ME__ };',
+        '}',
+        ''
+      ], action);
+    });
+
+    file.saveAs(path, this.args.name);
+  }
+
+  addDuckToConfig() {
+    const file = this.configFile;
+    if(!file.exists) return null;
+
+    file
+      .afterLast('import ', "import __naMe__ from './modules/__naMe__'", this.args.name)
+      .after('combineReducers({', '  __naMe__,', this.args.name)
+      .save();
+  }
+}

battlecry/generators/duck/templates/__naMe__.js

@@ -0,0 +1,10 @@
+// Actions
+
+// Reducer
+export default function reducer(state = {}, action = {}) {
+  switch (action.type) {
+    default: return state;
+  }
+}
+
+// Action Creators

battlecry/generators/duck/templates/configureStore.js

@@ -0,0 +1,12 @@
+import { createStore, applyMiddleware, combineReducers } from 'redux';
+import createLogger from 'redux-logger';
+
+const loggerMiddleware = createLogger(); // initialize logger
+
+const createStoreWithMiddleware = applyMiddleware(loggerMiddleware)(createStore); // apply logger to redux
+
+const reducer = combineReducers({
+});
+
+const configureStore = (initialState) => createStoreWithMiddleware(reducer, initialState);
+export default configureStore;