Import-Export States to your DevTools

src/devTools.js

@@ -3,6 +3,8 @@ const ActionTypes = {
   RESET: 'RESET',
   ROLLBACK: 'ROLLBACK',
   COMMIT: 'COMMIT',
+  EXPORT: 'EXPORT',
+  IMPORT: 'IMPORT',
   SWEEP: 'SWEEP',
   TOGGLE_ACTION: 'TOGGLE_ACTION',
   JUMP_TO_STATE: 'JUMP_TO_STATE',
@@ -86,7 +88,8 @@ function liftReducer(reducer, initialState) {
     skippedActions: {},
     currentStateIndex: 0,
     monitorState: {
-      isVisible: true
+      isVisible: true,
+      exportMode: false
     },
     timestamps: [Date.now()]
   };
@@ -121,6 +124,25 @@ function liftReducer(reducer, initialState) {
       currentStateIndex = 0;
       timestamps = [liftedAction.timestamp];
       break;
+    case ActionTypes.EXPORT:
+      monitorState = Object.assign(
+        {},
+        monitorState,
+        { exportMode: !monitorState.exportMode }
+      );
+      break;
+    case ActionTypes.IMPORT:
+      (
+        {
+          stagedActions,
+          skippedActions,
+          computedStates,
+          currentStateIndex,
+          monitorState,
+          timestamps
+        } = liftedAction.newState
+      );
+      break;
     case ActionTypes.ROLLBACK:
       stagedActions = [INIT_ACTION];
       skippedActions = {};
@@ -258,6 +280,12 @@ export const ActionCreators = {
   commit() {
     return { type: ActionTypes.COMMIT, timestamp: Date.now() };
   },
+  export() {
+    return { type: ActionTypes.EXPORT };
+  },
+  import(newState) {
+    return { type: ActionTypes.IMPORT, newState };
+  },
   sweep() {
     return { type: ActionTypes.SWEEP };
   },

src/react/LogMonitor.js

@@ -1,8 +1,12 @@
 import React, { PropTypes, findDOMNode, Component } from 'react';
 import LogMonitorEntry from './LogMonitorEntry';
 import LogMonitorButton from './LogMonitorButton';
+import LogMonitorTextarea from './LogMonitorTextarea';
 import * as themes from './themes';
 
+const EXPORT_CONTAINER_HEIGHT = 150;
+const ELEMENTS_CONTAINER_TOP = 38;
+
 const styles = {
   container: {
     fontFamily: 'monaco, Consolas, Lucida Console, monospace',
@@ -25,7 +29,7 @@ const styles = {
     position: 'absolute',
     left: 0,
     right: 0,
-    top: 38,
+    top: ELEMENTS_CONTAINER_TOP,
     bottom: 0,
     overflowX: 'hidden',
     overflowY: 'auto'
@@ -118,6 +122,14 @@ export default class LogMonitor extends Component {
     this.props.commit();
   }
 
+  handleExport() {
+    this.props.export();
+  }
+
+  handleImport(newState) {
+    this.props.import(newState);
+  }
+
   handleToggleAction(index) {
     this.props.toggleAction(index);
   }
@@ -184,8 +196,10 @@ export default class LogMonitor extends Component {
           <LogMonitorButton theme={theme} onClick={::this.handleRollback} enabled={computedStates.length}>Revert</LogMonitorButton>
           <LogMonitorButton theme={theme} onClick={::this.handleSweep} enabled={Object.keys(skippedActions).some(key => skippedActions[key])}>Sweep</LogMonitorButton>
           <LogMonitorButton theme={theme} onClick={::this.handleCommit} enabled={computedStates.length > 1}>Commit</LogMonitorButton>
+          <LogMonitorButton theme={theme} onClick={::this.handleExport} enabled={computedStates.length}>Export</LogMonitorButton>
         </div>
-        <div style={styles.elements} ref="elements">
+        <LogMonitorTextarea theme={theme} handleImport={::this.handleImport} currentState={this.props.store.getState()} />
+        <div style={{...styles.elements, top: monitorState.exportMode ? EXPORT_CONTAINER_HEIGHT : ELEMENTS_CONTAINER_TOP }} ref="elements">
           {elements}
         </div>
       </div>

src/react/LogMonitorTextarea.js

@@ -0,0 +1,42 @@
+import React, { PropTypes, findDOMNode, Component } from 'react';
+
+const EXPORT_CONTAINER_HEIGHT = 150;
+const ELEMENTS_CONTAINER_TOP = 38;
+
+var styles = {
+  exportContainer: {
+    width: '100%',
+    height: EXPORT_CONTAINER_HEIGHT
+  },
+  exportArea: {
+    position: 'relative',
+    resize: 'none',
+    width: '100%',
+    height: 112,
+    backgroundColor: '#4F5A66',
+    color: 'white'
+  }
+};
+
+export default class LogMonitorTextarea extends Component {
+  constructor(props) {
+    super(props);
+  }
+
+  parseInput(event) {
+    try {
+      this.props.handleImport(JSON.parse(event.target.value))
+    } catch(err) {
+      console.warn('There was an error parsing the new state. Please enter a valid schema.');
+    }
+  }
+
+  render() {
+    let { handleImport, currentState, theme } = this.props;
+    return currentState.monitorState.exportMode ? (
+      <div style={{...styles.exportContainer, backgroundColor: theme.base00}}>
+        <textarea style={styles.exportArea} value={JSON.stringify(currentState)} onChange={::this.parseInput} />
+      </div>
+    ) : null;
+  }
+}