hangouts-helper 19.12.0

Helper Python classes for handling and responding to Hangouts Chat events

Hangouts Chat Helper

Description

Helper Python classes for handling and responding to Hangouts Chat events.

Installation

Install with pip:

pip install hangouts-helper

Message Components

This library contains several component classes to assist with constructing a Hangouts Chat message.

• Message
• Section
• Card
• CardAction
• CardHeader
• TextParagraph
• KeyValue
• Image
• ButtonList
• ImageButton
• TextButton

Example

Using the Pizza Bot example from the official Hangouts Chat API documentation, this is how you'd construct the same message using the components above.

from hangouts_helper.message import (Message, Card, CardHeader, Section,
    Image, KeyValue, ButtonList, TextButton)

message = Message()
message.add_card(
    Card(
        CardHeader(
            title='Pizza Bot Customer Support',
            subtitle='[e-mail]',
            image_url='https://goo.gl/aeDtrS'),
        Section(
            KeyValue(top_label='Order No.', content='12345'),
            KeyValue(top_label='Status', content='In Delivery')),
        Section(
            'Location',
            Image(image_url='https://maps.googleapis.com/...')),
        Section(
            ButtonList(
                TextButton(text='OPEN ORDER').add_link(url='https://example.com/orders/...')))))

Calling message.output() produces a dict that can be converted to JSON... perfect for returning a response to a synchronous chat event, or sending a new message via the Hangouts Chat API.

{
    "cards": [
        {
            "header": {
                "imageUrl": "https://goo.gl/aeDtrS",
                "subtitle": "[e-mail]",
                "title": "Pizza Bot Customer Support"
            },
            "sections": [
                {
                    "widgets": [
                        {
                            "keyValue": {
                                "content": "12345",
                                "topLabel": "Order No."
                            }
                        },
                        {
                            "keyValue": {
                                "content": "In Delivery",
                                "topLabel": "Status"
                            }
                        }
                    ]
                },
                {
                    "header": "Location",
                    "widgets": [
                        {
                            "image": {
                                "imageUrl": "https://maps.googleapis.com/..."
                            }
                        }
                    ]
                },
                {
                    "widgets": [
                        {
                            "buttons": [
                                {
                                    "textButton": {
                                        "onClick": {
                                            "openLink": {
                                                "url": "https://example.com/orders/..."
                                            }
                                        },
                                        "text": "OPEN ORDER"
                                    }
                                }
                            ]
                        }
                    ]
                }
            ]
        }
    ]
}

Chat Handler

The library also includes a class to help with handling incoming chat events. The methods contained in HangoutsChatHandler correspond to the different event types you can expect to receive. Each method should return a message response.

Example

from enum import Enum

from hangouts_helper.handler import HangoutsChatHandler, SpaceType
from hangouts_helper.message import Message


class ActionMethod(Enum):
    BUTTON_CLICKED = 'BUTTON_CLICKED'


class MyHangoutsChatHandler(HangoutsChatHandler):
    ActionMethod = ActionMethod

    def handle_added_to_space(self, space_type, event):
        if space_type == SpaceType.DM:
            return Message(text="Thanks for DM'ing me!")
        elif space_type == SpaceType.ROOM:
            return Message(text="Thanks adding me to your room!")

    def handle_message(self, message, event):
        return Message(text="Thanks for your message!")

    def handle_card_clicked(self, action_method, action_parameters, event):
        if action_method == ActionMethod.BUTTON_CLICKED:
            return Message(text="I've processed your button click!")

    def handle_removed_from_space(self, event):
        pass

A Flask app that repsonds to Hangouts Chat events might look like:

from flask import Flask, jsonify
app = Flask(__name__)

@app.route('/')
def bot_handler():
    event = request.json
    handler = MyHangoutsChatHandler()
    response_message = handler.handle_event(event)
    return jsonify(response_message.output())

TODO

• Add examples for each component type in README
• Document and add examples for adding OnClick events to widgets
• Document Enums (SpaceType, EventType, ActionMethod, Icon, ImageStyle, ResponseType)
• Document usage scenarios for HangoutsChatHandler
• Add methods for interacting with Hangouts Chat API to HangoutsChatHandler