add sign in option for android client on server

android/Omnivore/app/src/main/java/app/omnivore/omnivore/LoginViewModel.kt

@@ -76,5 +76,36 @@ class LoginViewModel @Inject constructor(
     Log.d(ContentValues.TAG, "Google Result?: $googleIdToken")
     // TODO: submit id token to backend
     // If token is missing then set the error message
+
+    if (googleIdToken == null) {
+      return
+    }
+
+    val login = RetrofitHelper.getInstance().create(AuthProviderLoginSubmit::class.java)
+
+    viewModelScope.launch {
+      isLoading = true
+      errorMessage = null
+
+      val result = login.submitAuthProviderLogin(
+        SignInParams(token = googleIdToken, provider = "GOOGLE")
+      )
+
+      isLoading = false
+
+      if (result.body()?.authToken != null) {
+        datastoreRepo.putString(DatastoreKeys.omnivoreAuthToken, result.body()?.authToken!!)
+      } else {
+        errorMessage = "Something went wrong. Please check your email/password and try again"
+      }
+
+      if (result.body()?.authCookieString != null) {
+        datastoreRepo.putString(
+          DatastoreKeys.omnivoreAuthCookieString, result.body()?.authCookieString!!
+        )
+      }
+    }
   }
+
+
 }

android/Omnivore/app/src/main/java/app/omnivore/omnivore/RESTNetworker.kt

@@ -7,6 +7,17 @@ import retrofit2.http.Body
 import retrofit2.http.Headers
 import retrofit2.http.POST
 
+data class AuthPayload(
+  val authCookieString: String,
+  val authToken: String
+)
+
+data class SignInParams(
+  val token: String,
+  val provider: String, // APPLE or GOOGLE
+  val source: String = "ANDROID"
+)
+
 data class EmailAuthPayload(
   val authCookieString: String?,
   val authToken: String?,
@@ -24,6 +35,12 @@ interface EmailLoginSubmit {
   suspend fun submitEmailLogin(@Body credentials: EmailLoginCredentials): Response<EmailAuthPayload>
 }
 
+interface AuthProviderLoginSubmit {
+  @Headers("Content-Type: application/json")
+  @POST("/api/mobile-auth/sign-in")
+  suspend fun submitAuthProviderLogin(@Body params: SignInParams): Response<AuthPayload>
+}
+
 object RetrofitHelper {
   fun getInstance(): Retrofit {
     return Retrofit.Builder().baseUrl(Constants.demoProdURL)