[codorial] WIP Use relative images

codorials/authentication-with-firebase/app-navigation.md

@@ -0,0 +1,103 @@
+# App Navigation
+
+React Navigation has gone through many cycles of navigation implementations and has been a pain point for developers for a good while.
+A current "go to" navigation library is called [react-navigation](https://reactnavigation.org/). It's pure JavaScript implementation
+which performs well and provides a solid foundation for navigation on both Android and iOS.
+
+Authentication typically requires 3 screens; Login, Register & Forgot Password.
+
+## Installation
+
+Simply install the dependency via NPM, no native installation is needed:
+
+```bash
+npm install --save react-navigation
+```
+
+## Navigation Stacks
+
+Navigation on an app typically works in stacks, where a user can navigate to a new screen (pushing a new screen onto the stack), or backwards (popping
+a screen off the stack).
+
+What's great about this concept is that we can create multiple instances of a stack, for example a stack for unauthenticated users and another for
+authenticated ones.
+
+To create a new stack, we import the `StackNavigator` from `react-navigation`. In it's basic form, the first item of the `StackNavigator` object
+acts as our initial screen on the stack. Lets create a new directory and component for our unauthenticated state:
+
+```js
+// src/screens/unauthenticated/index.js
+
+import { StackNavigator } from 'react-navigation';
+
+import Login from './Login';
+import Register from './Register';
+
+export default StackNavigator({
+  Login: {
+    screen: Login,
+  },
+  Register: {
+    screen: Register,
+  }
+});
+```
+
+In both the `Login` & `Register` files, create a basic React component (change Login to Register where appropriate):
+
+```jsx
+// src/screens/unauthenticated/Login.js
+// src/screens/unauthenticated/Register.js
+
+import React, { Component } from 'react';
+import { View, Text } from 'react-native';
+
+class Login extends Component {
+  render() {
+    return (
+      <View>
+        <Text>
+          Login
+        </Text>
+      </View>
+    );
+  }
+}
+```
+
+## Using the stack
+
+StackNavigator returns a React component which can be rendered in our app. If we go back to our `src/App.js` component, we can now return
+the stack:
+
+```jsx
+// src/App.js
+
+import React, { Component } from 'react';
+
+import UnauthenticatedStack from './screens/unauthenticated';
+
+class App extends Component {
+
+    render() {
+      return <UnauthenticatedStack />;
+    }
+
+}
+
+export default App;
+```
+
+Our `UnauthenticatedStack` component will now show the `Login` component as it's the first item in the `StackNavigator`. Reload your app and you
+should have your `Login` component rendering!
+
+TODO image
+
+## Styling the navigator
+
+As you can see, `react-navigation` provides a base view which is platform specific.
+
+..
+
+## Pushing a new stack
+

codorials/authentication-with-firebase/config.json

@@ -18,6 +18,10 @@
     {
       "title": "Integrating Redux",
       "file": "integrating-redux"
+    },
+    {
+      "title": "App Navigation",
+      "file": "app-navigation"
     }
   ]
 }

codorials/authentication-with-firebase/integrating-redux.md

@@ -79,4 +79,4 @@ function bootstrap() {
 export default bootstrap;
 ```
 
-Our app now has access to the power of Redux!
+Although noting will visually change, our app now has access to the power of Redux!

codorials/authentication-with-firebase/project-structure.md

@@ -70,7 +70,7 @@ consumes our entire application.
 
 Go ahead and boot up your app onto your emulator. You should simply be presented with a plain screen with the words "Bootstrapped!".
 
-![Bootstrapped!](https://raw.githubusercontent.com/invertase/react-native-firebase/codorials/codorials/authentication-with-firebase/assets/app-bootstrapped.jpg =300x*)
+![Bootstrapped!](assets/app-bootstrapped.jpg =300x*)
 
 Although a good starting point, we want to separate we'll our business logic out of the bootstrap file, keeping it purely for app
 initialization purposes. This can simply be done by creating a basic React component called `App.js`, which will also live in the `src` directory;

codorials/authentication-with-firebase/understanding-firebase-auth.md

@@ -16,14 +16,8 @@ Find the Authentication section and you'll be prompted with a number of options.
 You'll see we have a number of options here, however for purposes of this Codorial we'll be using "Email/Password" and "Facebook" as our providers.
 Go ahead and enable these:
 
-![Enabled Providers](https://raw.githubusercontent.com/invertase/react-native-firebase/codorials/codorials/authentication-with-firebase/assets/auth-providers.jpg)
-
-![Enabled Providers](/assets/auth-providers.jpg)
-
 ![Enabled Providers](assets/auth-providers.jpg)
 
-![](assets/auth-providers.jpg)
-
 > If you don't have a Facebook app, simply enter dummy values. We'll cover this later on.
 
 ## Listening to the users authentication state