feat: added support for domain switching

[desusai7]

Added support for domain switching

• Updated the hasValidAuth0Instance method in both Android & iOS modules to check if the existing auth0 instance clientId & domain are same as the clientId & domain passed from the React Native layer and if they are different we are creating new instance of Auth0, this would enable customers to switch between different domains quickly.

• To support multiple domains in an Android app, developers need to add intent filters to their AndroidManifest.xml file. The following code snippet demonstrates how to do this. By incorporating these changes, the default IntentFilter provided by the library is overridden, eliminating the need to specify manifestPlaceHolders in the app's build.gradle file. Simply add a <data> element within the <intent-filter> of com.auth0.android.provider.RedirectActivity for each domain you wish to accommodate.

    <activity
      android:name="com.auth0.android.provider.RedirectActivity" tools:node="replace"
      android:exported="true">
      <intent-filter>
        <action android:name="android.intent.action.VIEW" />

        <category android:name="android.intent.category.DEFAULT" />
        <category android:name="android.intent.category.BROWSABLE" />

        <data
          android:host="domain1"
          android:pathPrefix="/android/${applicationId}/callback"
          android:scheme="${applicationId}.auth0" />
        <data
          android:host="domain2"
          android:pathPrefix="/android/${applicationId}/callback"
          android:scheme="${applicationId}.auth0" />
      </intent-filter>
    </activity>

References

#747
#911

Testing

Since these changes are made on the bridge layers of both Android and iOS platforms, we do not have test setup there, so updated the sample app to use multiple domains in two different screens by default and tested it on both Android and iOS platforms.

• This change adds unit test coverage
• This change has been tested on the latest version of the platform/language or why not

Checklist

• I have read the Auth0 general contribution guidelines
• All existing and new tests complete without errors
• All active GitHub checks have passed

[poovamraj]

contains check needs to be reworked

[MAlvesKitestring]

Hey, guys! @desusai7 @poovamraj Great feature, thanks for working on it!

We are using expo, do you guys know how we could use it? Is it available through some config plugin property?

[desusai7]

Hi @MAlvesKitestring,

We've released this just now as part of version 4.0.0-beta.0, yes, we are supporting expo as well, please check out more on it here