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# Copyright 2024 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 chat_avatar_app]

from typing import Any, Mapping

import flask

import functions_framework

# Command IDs (configure these in Google Chat API)

ABOUT_COMMAND_ID = 1 # ID for the "/about" slash command

HELP_COMMAND_ID = 2 # ID for the "Help" quick command

@functions_framework.http

def avatar_app(req: flask.Request) -> Mapping[str, Any]:

"""Google Cloud Function that handles HTTP requests from Google Chat.

Args:

flask.Request: the request

Returns:

Mapping[str, Any]: the response

"""

event = req.get_json(silent=True)

if event and "appCommandMetadata" in event:

return handle_app_commands(event)

else:

return handle_regular_message(event)

# [START chat_avatar_slash_command]

def handle_app_commands(event: Mapping[str, Any]) -> Mapping[str, Any]:

"""Handles slash and quick commands.

Args:

Mapping[str, Any] event: The Google Chat event.

Returns:

Mapping[str, Any]: the response

"""

app_command_id = event["appCommandMetadata"]["appCommandId"]

if app_command_id == ABOUT_COMMAND_ID:

return {

"privateMessageViewer": event["user"],

"text": "The Avatar app replies to Google Chat messages.",

}

elif app_command_id == HELP_COMMAND_ID:

return {

"privateMessageViewer": event["user"],

"text": "The Avatar app replies to Google Chat messages.",

}

return {}

# [END chat_avatar_slash_command]

def handle_regular_message(event: Mapping[str, Any]) -> Mapping[str, Any]:

"""Handles regular messages (not commands).

Args:

Mapping[str, Any] event: The Google Chat event.

Returns:

Mapping[str, Any]: the response

"""

if not event or "user" not in event:

return "Invalid request."

message_data = create_message(event["user"])

return message_data

def create_message(user: Mapping[str, Any]) -> Mapping[str, Any]:

"""Creates a card message with the user's avatar.

Args:

Mapping[str, Any] user: The user who sent the message.

Returns:

Mapping[str, Any]: a card with the user's avatar.

"""

display_name = user.get("displayName", "")

avatar_url = user.get("avatarUrl", "")

return {

"text": "Here's your avatar",

"cardsV2": [

{

"cardId": "avatarCard",

"card": {

"name": "Avatar Card",

"header": {"title": f"Hello {display_name}!"},

"sections": [

{

"widgets": [

{"textParagraph": {"text": "Your avatar picture:"}},

{"image": {"imageUrl": avatar_url}},

]

}

],

},

}

],

}

# [END chat_avatar_app]