Added snippets for email action links API (#264)

* Added snippets for email action links API

* Fixing a lint error; Fixing a regression caused by googleapis/google-auth-library-python#324

* Fixing order of exported methods

* Applying feedback from docs team; Updating snippets based on code review comments

Author: hiranya911

firebase_admin/auth.py

@@ -52,8 +52,8 @@
     'create_session_cookie',
     'create_user',
     'delete_user',
-    'generate_password_reset_link',
     'generate_email_verification_link',
+    'generate_password_reset_link',
     'generate_sign_in_with_email_link',
     'get_user',
     'get_user_by_email',
@@ -464,7 +464,7 @@ def generate_password_reset_link(email, action_code_settings=None, app=None):
             passed in the deep link.
         app: An App instance (optional).
     Returns:
-        link: The password reset link created by API
+        link: The password reset link created by the API
 
     Raises:
         ValueError: If the provided arguments are invalid
@@ -488,7 +488,7 @@ def generate_email_verification_link(email, action_code_settings=None, app=None)
             passed in the deep link.
         app: An App instance (optional).
     Returns:
-        link: The email verification link created by API
+        link: The email verification link created by the API
 
     Raises:
         ValueError: If the provided arguments are invalid
@@ -512,7 +512,7 @@ def generate_sign_in_with_email_link(email, action_code_settings, app=None):
             passed in the deep link.
         app: An App instance (optional).
     Returns:
-        link: The email sign in link created by API
+        link: The email sign-in link created by the API
 
     Raises:
         ValueError: If the provided arguments are invalid

snippets/auth/index.py

@@ -587,6 +587,54 @@ def import_without_password():
         print('Error importing users:', error)
     # [END import_without_password]
 
+def init_action_code_settings():
+    # [START init_action_code_settings]
+    action_code_settings = auth.ActionCodeSettings(
+        url='https://www.example.com/checkout?cartId=1234',
+        handle_code_in_app=True,
+        ios_bundle_id='com.example.ios',
+        android_package_name='com.example.android',
+        android_install_app=True,
+        android_minimum_version='12',
+        dynamic_link_domain='coolapp.page.link',
+    )
+    # [END init_action_code_settings]
+    return action_code_settings
+
+def password_reset_link():
+    action_code_settings = init_action_code_settings()
+    # [START password_reset_link]
+    email = 'user@example.com'
+    link = auth.generate_password_reset_link(email, action_code_settings)
+    # Construct password reset email from a template embedding the link, and send
+    # using a custom SMTP server.
+    send_custom_email(email, link)
+    # [END password_reset_link]
+
+def email_verification_link():
+    action_code_settings = init_action_code_settings()
+    # [START email_verification_link]
+    email = 'user@example.com'
+    link = auth.generate_email_verification_link(email, action_code_settings)
+    # Construct email from a template embedding the link, and send
+    # using a custom SMTP server.
+    send_custom_email(email, link)
+    # [END email_verification_link]
+
+def sign_in_with_email_link():
+    action_code_settings = init_action_code_settings()
+    # [START sign_in_with_email_link]
+    email = 'user@example.com'
+    link = auth.generate_sign_in_with_email_link(email, action_code_settings)
+    # Construct email from a template embedding the link, and send
+    # using a custom SMTP server.
+    send_custom_email(email, link)
+    # [END sign_in_with_email_link]
+
+def send_custom_email(email, link):
+    del email
+    del link
+
 initialize_sdk_with_service_account()
 initialize_sdk_with_application_default()
 #initialize_sdk_with_refresh_token()

tests/test_token_gen.py

@@ -207,7 +207,7 @@ def test_sign_with_iam(self):
             iam_resp = '{{"signature": "{0}"}}'.format(signature)
             _overwrite_iam_request(app, testutils.MockRequest(200, iam_resp))
             custom_token = auth.create_custom_token(MOCK_UID, app=app).decode()
-            assert custom_token.endswith('.' + signature)
+            assert custom_token.endswith('.' + signature.rstrip('='))
             self._verify_signer(custom_token, 'test-service-account')
         finally:
             firebase_admin.delete_app(app)
@@ -241,7 +241,7 @@ def test_sign_with_discovered_service_account(self):
             request.response = testutils.MockResponse(
                 200, '{{"signature": "{0}"}}'.format(signature))
             custom_token = auth.create_custom_token(MOCK_UID, app=app).decode()
-            assert custom_token.endswith('.' + signature)
+            assert custom_token.endswith('.' + signature.rstrip('='))
             self._verify_signer(custom_token, 'discovered-service-account')
             assert len(request.log) == 2
             assert request.log[0][1]['headers'] == {'Metadata-Flavor': 'Google'}