[flow] Make StackRouter action creators optional and add DrawerRouter ones (#4257)

This will force all Flow users to do runtime assertions if they want to use these action creators. Open to any better solutions.

examples/NavigationPlayground/js/SimpleStack.js

@@ -16,6 +16,8 @@ import {
   SafeAreaView,
   withNavigation,
 } from 'react-navigation';
+import invariant from 'invariant';
+
 import SampleText from './SampleText';
 import { Button } from './commonComponents/ButtonWithMargin';
 import { HeaderButtons } from './commonComponents/HeaderButtons';
@@ -48,11 +50,16 @@ const MyBackButtonWithNavigation = withNavigation(MyBackButton);
 class MyNavScreen extends React.Component<MyNavScreenProps> {
   render() {
     const { navigation, banner } = this.props;
+    const { push, replace, popToTop, pop, dismiss } = navigation;
+    invariant(
+      push && replace && popToTop && pop && dismiss,
+      'missing action creators for StackNavigator'
+    );
     return (
       <SafeAreaView>
         <SampleText>{banner}</SampleText>
         <Button
-          onPress={() => navigation.push('Profile', { name: 'Jane' })}
+          onPress={() => push('Profile', { name: 'Jane' })}
           title="Push a profile screen"
         />
         <Button
@@ -60,13 +67,13 @@ class MyNavScreen extends React.Component<MyNavScreenProps> {
           title="Navigate to a photos screen"
         />
         <Button
-          onPress={() => navigation.replace('Profile', { name: 'Lucy' })}
+          onPress={() => replace('Profile', { name: 'Lucy' })}
           title="Replace with profile"
         />
-        <Button onPress={() => navigation.popToTop()} title="Pop to top" />
-        <Button onPress={() => navigation.pop()} title="Pop" />
+        <Button onPress={() => popToTop()} title="Pop to top" />
+        <Button onPress={() => pop()} title="Pop" />
         <Button onPress={() => navigation.goBack()} title="Go back" />
-        <Button onPress={() => navigation.dismiss()} title="Dismiss" />
+        <Button onPress={() => dismiss()} title="Dismiss" />
         <StatusBar barStyle="default" />
       </SafeAreaView>
     );

examples/NavigationPlayground/js/StackWithHeaderPreset.js

@@ -6,6 +6,8 @@ import type { NavigationScreenProp } from 'react-navigation';
 import * as React from 'react';
 import { ScrollView, StatusBar } from 'react-native';
 import { createStackNavigator, SafeAreaView } from 'react-navigation';
+import invariant from 'invariant';
+
 import { Button } from './commonComponents/ButtonWithMargin';
 
 type NavScreenProps = {
@@ -19,15 +21,14 @@ class HomeScreen extends React.Component<NavScreenProps> {
 
   render() {
     const { navigation } = this.props;
+    const { push } = navigation;
+    invariant(push, 'missing `push` action creator for StackNavigator');
 
     return (
       <SafeAreaView style={{ paddingTop: 30 }}>
+        <Button onPress={() => push('Other')} title="Push another screen" />
         <Button
-          onPress={() => navigation.push('Other')}
-          title="Push another screen"
-        />
-        <Button
-          onPress={() => navigation.push('ScreenWithNoHeader')}
+          onPress={() => push('ScreenWithNoHeader')}
           title="Push screen with no header"
         />
         <Button onPress={() => navigation.goBack(null)} title="Go Home" />
@@ -44,18 +45,20 @@ class OtherScreen extends React.Component<NavScreenProps> {
 
   render() {
     const { navigation } = this.props;
+    const { push, pop } = navigation;
+    invariant(push && pop, 'missing action creators for StackNavigator');
 
     return (
       <SafeAreaView style={{ paddingTop: 30 }}>
         <Button
-          onPress={() => navigation.push('ScreenWithLongTitle')}
+          onPress={() => push('ScreenWithLongTitle')}
           title="Push another screen"
         />
         <Button
-          onPress={() => navigation.push('ScreenWithNoHeader')}
+          onPress={() => push('ScreenWithNoHeader')}
           title="Push screen with no header"
         />
-        <Button onPress={() => navigation.pop()} title="Pop" />
+        <Button onPress={() => pop()} title="Pop" />
         <Button onPress={() => navigation.goBack(null)} title="Go back" />
         <StatusBar barStyle="default" />
       </SafeAreaView>
@@ -70,10 +73,12 @@ class ScreenWithLongTitle extends React.Component<NavScreenProps> {
 
   render() {
     const { navigation } = this.props;
+    const { pop } = navigation;
+    invariant(pop, 'missing `pop` action creator for StackNavigator');
 
     return (
       <SafeAreaView style={{ paddingTop: 30 }}>
-        <Button onPress={() => navigation.pop()} title="Pop" />
+        <Button onPress={() => pop()} title="Pop" />
         <Button onPress={() => navigation.goBack(null)} title="Go back" />
         <StatusBar barStyle="default" />
       </SafeAreaView>
@@ -89,14 +94,13 @@ class ScreenWithNoHeader extends React.Component<NavScreenProps> {
 
   render() {
     const { navigation } = this.props;
+    const { push, pop } = navigation;
+    invariant(push && pop, 'missing action creators for StackNavigator');
 
     return (
       <SafeAreaView style={{ paddingTop: 30 }}>
-        <Button
-          onPress={() => navigation.push('Other')}
-          title="Push another screen"
-        />
-        <Button onPress={() => navigation.pop()} title="Pop" />
+        <Button onPress={() => push('Other')} title="Push another screen" />
+        <Button onPress={() => pop()} title="Pop" />
         <Button onPress={() => navigation.goBack(null)} title="Go back" />
         <StatusBar barStyle="default" />
       </SafeAreaView>

examples/NavigationPlayground/js/StackWithTranslucentHeader.js

@@ -19,6 +19,8 @@ import {
   View,
 } from 'react-native';
 import { Header, createStackNavigator } from 'react-navigation';
+import invariant from 'invariant';
+
 import SampleText from './SampleText';
 import { Button } from './commonComponents/ButtonWithMargin';
 import { HeaderButtons } from './commonComponents/HeaderButtons';
@@ -31,11 +33,16 @@ type MyNavScreenProps = {
 class MyNavScreen extends React.Component<MyNavScreenProps> {
   render() {
     const { navigation, banner } = this.props;
+    const { push, replace, popToTop, pop } = navigation;
+    invariant(
+      push && replace && popToTop && pop,
+      'missing action creators for StackNavigator'
+    );
     return (
       <ScrollView style={{ flex: 1 }} {...this.getHeaderInset()}>
         <SampleText>{banner}</SampleText>
         <Button
-          onPress={() => navigation.push('Profile', { name: 'Jane' })}
+          onPress={() => push('Profile', { name: 'Jane' })}
           title="Push a profile screen"
         />
         <Button
@@ -43,11 +50,11 @@ class MyNavScreen extends React.Component<MyNavScreenProps> {
           title="Navigate to a photos screen"
         />
         <Button
-          onPress={() => navigation.replace('Profile', { name: 'Lucy' })}
+          onPress={() => replace('Profile', { name: 'Lucy' })}
           title="Replace with profile"
         />
-        <Button onPress={() => navigation.popToTop()} title="Pop to top" />
-        <Button onPress={() => navigation.pop()} title="Pop" />
+        <Button onPress={() => popToTop()} title="Pop to top" />
+        <Button onPress={() => pop()} title="Pop" />
         <Button onPress={() => navigation.goBack(null)} title="Go back" />
         <StatusBar barStyle="default" />
       </ScrollView>

examples/NavigationPlayground/package.json

@@ -12,6 +12,7 @@
   },
   "dependencies": {
     "expo": "^26.0.0",
+    "invariant": "^2.2.4",
     "react": "16.3.0-alpha.1",
     "react-native": "^0.54.0",
     "react-native-iphone-x-helper": "^1.0.2",

examples/NavigationPlayground/yarn.lock

@@ -3424,7 +3424,7 @@ instapromise@^2.0.7:
   version "2.0.7"
   resolved "https://registry.yarnpkg.com/instapromise/-/instapromise-2.0.7.tgz#85e66b31021194da11214c865127ef04ec30167a"
 
-invariant@^2.0.0, invariant@^2.2.0, invariant@^2.2.2:
+invariant@^2.0.0, invariant@^2.2.0, invariant@^2.2.2, invariant@^2.2.4:
   version "2.2.4"
   resolved "https://registry.yarnpkg.com/invariant/-/invariant-2.2.4.tgz#610f3c92c9359ce1db616e538008d23ff35158e6"
   dependencies:

flow/react-navigation.js

@@ -489,8 +489,14 @@ declare module 'react-navigation' {
   declare export type NavigationScreenProp<+S> = {
     +state: S,
     dispatch: NavigationDispatch,
+    addListener: (
+      eventName: string,
+      callback: NavigationEventCallback
+    ) => NavigationEventSubscription,
+    getParam: (paramName: string, fallback?: any) => any,
+    isFocused: () => boolean,
+    // Shared action creators that exist for all routers
     goBack: (routeKey?: ?string) => boolean,
-    dismiss: () => boolean,
     navigate: (
       routeName:
         | string
@@ -504,24 +510,25 @@ declare module 'react-navigation' {
       action?: NavigationNavigateAction
     ) => boolean,
     setParams: (newParams: NavigationParams) => boolean,
-    getParam: (paramName: string, fallback?: any) => any,
-    addListener: (
-      eventName: string,
-      callback: NavigationEventCallback
-    ) => NavigationEventSubscription,
-    push: (
+    // StackRouter action creators
+    pop?: (n?: number, params?: { immediate?: boolean }) => boolean,
+    popToTop?: (params?: { immediate?: boolean }) => boolean,
+    push?: (
       routeName: string,
       params?: NavigationParams,
       action?: NavigationNavigateAction
     ) => boolean,
-    replace: (
+    replace?: (
       routeName: string,
       params?: NavigationParams,
       action?: NavigationNavigateAction
     ) => boolean,
-    pop: (n?: number, params?: { immediate?: boolean }) => boolean,
-    popToTop: (params?: { immediate?: boolean }) => boolean,
-    isFocused: () => boolean,
+    reset?: (actions: NavigationAction[], index: number) => boolean,
+    dismiss?: () => boolean,
+    // DrawerRouter action creators
+    openDrawer?: () => boolean,
+    closeDrawer?: () => boolean,
+    toggleDrawer?: () => boolean,
   };
 
   declare export type NavigationNavigatorProps<O: {}, S: {}> = $Shape<{