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# Copyright 2018 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.

import flask

import functions_framework

from app import get_index_context, init_connection_pool, migrate_db, save_vote

############ TABS vs. SPACES App for Cloud Functions ############

# lazy global initialization

# db connection must be established within request context

db = None

@functions_framework.http

def votes(request: flask.Request) -> flask.Response:

global db

# initialize db within request context

if not db:

# initiate a connection pool to a Cloud SQL database

db = init_connection_pool()

# creates required 'votes' table in database (if it does not exist)

migrate_db(db)

if request.method == "GET":

context = get_index_context(db)

return flask.render_template("index.html", **context)

if request.method == "POST":

team = request.form["team"]

return save_vote(db, team)

return flask.Response(

response="Invalid http request. Method not allowed, must be 'GET' or 'POST'",

status=400,

)