docs(samples): Adds snippet for configuring new session parameters tr…

…igger transition.

samples/snippets/webhook_configure_session_parameters_trigger_transition.py

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+# Copyright 2022, Google LLC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+""" DialogFlow CX: Configure new session parameters with trigger transition."""
+
+# [START dialogflow_v3beta1_webhook_configure_session_parameters_trigger_transition]
+
+# TODO (developer): change entry point to trigger_transition in Cloud Function
+
+
+def trigger_transition(request):
+    """Webhook to validate or configure new session parameters."""
+
+    request_dict = request.get_json()
+    session_parameter = request_dict["sessionInfo"]["parameters"].get("value", 25)
+
+    if session_parameter > 15:
+        text = f"You said {session_parameter}. Let me redirect you to our higher number department"
+        target_page = (
+            "projects/<Project ID>/locations/<Location ID>/"
+            "agents/<Agent ID>/flows/<Flow ID>/pages/<Page ID>"
+        )
+    else:
+        text = f"{session_parameter} is a number I can help you with!"
+        target_page = (
+            "projects/<Project ID>/locations/<Location ID>/"
+            "agents/<Agent ID>/flows/<Flow ID>/pages/<Page ID>"
+        )
+
+    json_response = {
+        "target_page": target_page,
+        "fulfillment_response": {
+            "messages": [
+                {
+                    "text": {
+                        "text": [
+                            # fulfillment text response to be sent to the agent
+                            text
+                        ],
+                    },
+                },
+            ],
+        },
+    }
+
+    return json_response
+
+
+# [END dialogflow_v3beta1_webhook_configure_session_parameters_trigger_transition]

samples/snippets/webhook_configure_session_parameters_trigger_transition_test.py

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+# Copyright 2022, Google LLC
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Test configure new session parameters trigger transition."""
+
+import flask
+import pytest
+
+from webhook_configure_session_parameters_trigger_transition import trigger_transition
+
+
+@pytest.fixture(name="app", scope="module")
+def fixture_app():
+    """Flask fixture to pass a flask.Request to the test function."""
+    return flask.Flask(__name__)
+
+
+@pytest.mark.parametrize(
+    "value,expected_response",
+    [
+        (15, "15 is a number I can help you with!"),
+        (None, "You said 25. Let me redirect you to our higher number department"),
+        (30, "You said 30. Let me redirect you to our higher number department"),
+    ],
+)
+def test_trigger_transition(value, expected_response, app):
+    """Parameterized test for configure new session parameters with trigger transition."""
+
+    if not value:
+        request = {"sessionInfo": {"parameters": {}}}
+    else:
+        request = {"sessionInfo": {"parameters": {"value": value}}}
+
+    with app.test_request_context(json=request):
+        res = trigger_transition(flask.request)
+        assert res["target_page"] == (
+            "projects/<Project ID>/locations/<Location ID>/"
+            "agents/<Agent ID>/flows/<Flow ID>/pages/<Page ID>"
+        )
+        assert (
+            res["fulfillment_response"]["messages"][0]["text"]["text"][0]
+            == expected_response
+        )