GoogleCloudPlatform · kenneth-rosario · Apr 17, 2023 · Mar 30, 2023
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+# Copyright 2023 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.
+
+# [START functions_cloudevent_firebase_reactive]
+from cloudevents.http import CloudEvent
+import functions_framework
+from google.cloud import firestore
+from google.events.cloud import firestore as firestoredata
+
+client = firestore.Client()
+
+
+# Converts strings added to /messages/{pushId}/original to uppercase
+@functions_framework.cloud_event
+def make_upper_case(cloud_event: CloudEvent) -> None:
+    firestore_payload = firestoredata.DocumentEventData()
+    firestore_payload._pb.ParseFromString(cloud_event.data)
+
+    path_parts = firestore_payload.value.name.split("/")
+    separator_idx = path_parts.index("documents")
+    collection_path = path_parts[separator_idx + 1]
+    document_path = "/".join(path_parts[(separator_idx + 2) :])
+
+    print(f"Collection path: {collection_path}")
+    print(f"Document path: {document_path}")
+
+    affected_doc = client.collection(collection_path).document(document_path)
+
+    cur_value = firestore_payload.value.fields["original"].string_value
+    new_value = cur_value.upper()
+
+    if cur_value != new_value:
+        print(f"Replacing value: {cur_value} --> {new_value}")
+        affected_doc.set({"original": new_value})
+    else:
+        # Value is already upper-case
+        # Don't perform a second write (which can trigger an infinite loop)
+        print("Value is already upper-case.")
+
+
+# [END functions_cloudevent_firebase_reactive]
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+# Copyright 2023 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.
+
+from unittest.mock import patch
+
+from cloudevents.http import CloudEvent
+from google.events.cloud import firestore as firestoredata
+
+import main
+
+
+def make_event(string_value, collection_id, document_path):
+    firestore_payload = firestoredata.DocumentEventData()
+    firestore_payload.value = firestoredata.Document()
+    firestore_payload.value.name = f"/projects/test-project/databases/(default)/documents/{collection_id}/{document_path}"
+    field_value = firestoredata.Value()
+    field_value.string_value = string_value
+    firestore_payload.value.fields = {"original": field_value}
+
+    attributes = {
+        "id": "5e9f24a",
+        "type": "google.cloud.firestore.document.v1.written",
+        "source": "/projects/test-project/databases/(default)",
+    }
+    data = firestore_payload._pb.SerializeToString()
+    cloud_event = CloudEvent(attributes, data)
+
+    return cloud_event
+
+
+def test_make_upper_case(capsys):
+    with patch("main.client"):
+        event = make_event("foo", "test-collection", "test-doc")
+
+        main.make_upper_case(event)
+
+        out, _ = capsys.readouterr()
+        assert "Collection path: test-collection" in out
+        assert "Document path: test-doc" in out
+        assert "Replacing value: foo --> FOO" in out
+
+
+def test_make_upper_case_skips_if_upper(capsys):
+    with patch("main.client"):
+        event = make_event("FOO", "foods", "tacos/vegan")
+
+        main.make_upper_case(event)
+
+        out, _ = capsys.readouterr()
+        assert "Collection path: foods" in out
+        assert "Document path: tacos/vegan" in out
+        assert "Value is already upper-case." in out
@@ -0,0 +1 @@
+pytest==7.0.1
@@ -0,0 +1,6 @@
+functions-framework==3.3.0
+google-events==0.4.0
+google-api-core==2.11.0
+protobuf==4.22.1
+google-cloud-firestore==2.10.1
+cloudevents==1.9.0