Added delete option to database storage.

venv/Lib/site-packages/firebase_admin/firestore.py

@@ -0,0 +1,76 @@
+# Copyright 2017 Google Inc.
+#
+# 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.
+
+"""Cloud Firestore module.
+
+This module contains utilities for accessing the Google Cloud Firestore databases associated with
+Firebase apps. This requires the ``google-cloud-firestore`` Python module.
+"""
+
+try:
+    from google.cloud import firestore # pylint: disable=import-error,no-name-in-module
+    existing = globals().keys()
+    for key, value in firestore.__dict__.items():
+        if not key.startswith('_') and key not in existing:
+            globals()[key] = value
+except ImportError:
+    raise ImportError('Failed to import the Cloud Firestore library for Python. Make sure '
+                      'to install the "google-cloud-firestore" module.')
+
+from firebase_admin import _utils
+
+
+_FIRESTORE_ATTRIBUTE = '_firestore'
+
+
+def client(app=None):
+    """Returns a client that can be used to interact with Google Cloud Firestore.
+
+    Args:
+      app: An App instance (optional).
+
+    Returns:
+      google.cloud.firestore.Firestore: A `Firestore Client`_.
+
+    Raises:
+      ValueError: If a project ID is not specified either via options, credentials or
+          environment variables, or if the specified project ID is not a valid string.
+
+    .. _Firestore Client: https://googlecloudplatform.github.io/google-cloud-python/latest\
+          /firestore/client.html
+    """
+    fs_client = _utils.get_app_service(app, _FIRESTORE_ATTRIBUTE, _FirestoreClient.from_app)
+    return fs_client.get()
+
+
+class _FirestoreClient:
+    """Holds a Google Cloud Firestore client instance."""
+
+    def __init__(self, credentials, project):
+        self._client = firestore.Client(credentials=credentials, project=project)
+
+    def get(self):
+        return self._client
+
+    @classmethod
+    def from_app(cls, app):
+        """Creates a new _FirestoreClient for the specified app."""
+        credentials = app.credential.get_credential()
+        project = app.project_id
+        if not project:
+            raise ValueError(
+                'Project ID is required to access Firestore. Either set the projectId option, '
+                'or use service account credentials. Alternatively, set the GOOGLE_CLOUD_PROJECT '
+                'environment variable.')
+        return _FirestoreClient(credentials, project)