LINE Bot × Google Home で家族のメッセージを音声通知

pip install flask line-bot-sdk

{
    "line": {
        "user": {
            "user1": {
                "id": "<LINEユーザーID>",
                "name": "<名前>",
                "voice_name": "ja-JP-Wavenet-A"
            },
            "user2": {
                "id": "<LINEユーザーID>",
                "name": "<名前>",
                "voice_name": "ja-JP-Wavenet-B"
            }
        },
        "channel": {
            "googlehome": {
                "channel_secret": "<チャンネルシークレット>",
                "access_token": "<アクセストークン>"
            },
            "googlehome_<子供の名前>": {
                "channel_secret": "<チャンネルシークレット>",
                "access_token": "<アクセストークン>"
            }
        }
    }
}

# -*- coding: utf-8 -*-
import googlehome
from flask import request, abort
from linebot import LineBotApi, WebhookHandler
from linebot.exceptions import InvalidSignatureError
from linebot.models import MessageEvent, TextMessage, TextSendMessage
from . import webhooks_bp

notify = googlehome.Notify(googlehome.GoogleHome.LIVING)
notify_childroom = googlehome.Notify(googlehome.GoogleHome.CHILD_ROOM)

handler_googlehome = WebhookHandler(settings['line']['channel']['googlehome']['channel_secret'])
handler_googlehome_child = WebhookHandler(settings['line']['channel']['googlehome_<子供の名前>']['channel_secret'])

# ---- リビング用チャンネルの Webhook エンドポイント ----
@webhooks_bp.route("/googlehome/", methods=['POST'])
def callback_googlehome():
    signature = request.headers['X-Line-Signature']
    body = request.get_data(as_text=True)
    try:
        handler_googlehome.handle(body, signature)
    except InvalidSignatureError:
        abort(400)
    return 'OK'

# ---- 子供部屋用チャンネルの Webhook エンドポイント ----
@webhooks_bp.route("/googlehome_<子供の名前>/", methods=['POST'])
def callback_googlehome_child():
    signature = request.headers['X-Line-Signature']
    body = request.get_data(as_text=True)
    try:
        handler_googlehome_child.handle(body, signature)
    except InvalidSignatureError:
        abort(400)
    return 'OK'

# ---- 共通：送信者情報の取得とメッセージ前処理 ----
def get_line_sending_info(event, line_bot_api: LineBotApi) -> tuple:
    userid = event.source.user_id
    try:
        user_name = line_bot_api.get_profile(userid).display_name
    except Exception:
        user_name = 'アノニマス'

    # settings.json から送信者名と音声名を取得
    sender_name = None
    voice_name = None
    for user in settings['line']['user']:
        if userid == settings['line']['user'][user]['id']:
            sender_name = settings['line']['user'][user]['name']
            voice_name = settings['line']['user'][user]['voice_name']
            break

    message = event.message.text
    # URL を含む場合は短い説明文に置き換え
    if message.startswith("http"):
        message = "ウェブページへのリンクが送信されました。"
    elif "http" in message:
        message = message.split("http")[0] + "[ウェブページへのリンクあり]"

    line_bot_name = line_bot_api.get_bot_info().display_name
    return line_bot_name, sender_name, voice_name, message

# ---- スラッシュコマンドの処理 ----
def set_googlehome_parameters(notify: googlehome.Notify, message: str) -> str | None:
    if not message.startswith("/") or len(message) < 2:
        return
    parts = message.strip().split()
    command = parts[0][1:]  # "/" を除去
    args = parts[1:]

    if command == "volume":
        notify.volume = float(args[0])
    elif command == "up_volume":
        notify.up_volume()
    elif command == "down_volume":
        notify.down_volume()
    elif command == "mute":
        notify.mute()
    elif command == "unmute":
        notify.unmute()
    elif command == "status":
        status = notify.status
        return (
            f'name: {status.get("name")}\n'
            f'ip: {status.get("ip")}\n'
            f'Volume: {status.get("volume")}\n'
            f'tts_voice_name: {notify.tts_voice_name}'
        )
    elif command == "help":
        return (
            '/volume: 音量を変更します (0.0 - 1.0)\n'
            '/up_volume: 音量を上げます\n'
            '/down_volume: 音量を下げます\n'
            '/mute: ミュートします\n'
            '/unmute: ミュートを解除します\n'
            '/status: ステータスを表示します\n'
            '/help: ヘルプを表示します'
        )

# ---- リビング用メッセージハンドラ ----
@handler_googlehome.add(MessageEvent, message=TextMessage)
def handle_message_googlehome(event):
    line_bot_api = LineBotApi(settings['line']['channel']['googlehome']['access_token'])
    line_bot_name, sender_name, voice_name, message = get_line_sending_info(event, line_bot_api)

    if message.startswith("/"):
        reply_message = set_googlehome_parameters(notify, message)
        if reply_message:
            line_bot_api.reply_message(event.reply_token, TextSendMessage(text=reply_message))
    else:
        message = message.strip()
        if sender_name is not None:
            message = message + ' by ' + sender_name
        notify.speak(message, voice_name=voice_name)

# ---- 子供部屋用メッセージハンドラ（最大音量・ランダム音声）----
@handler_googlehome_child.add(MessageEvent, message=TextMessage)
def handle_message_googlehome_child(event):
    line_bot_api = LineBotApi(settings['line']['channel']['googlehome_<子供の名前>']['access_token'])
    line_bot_name, sender_name, voice_name, message = get_line_sending_info(event, line_bot_api)

    if message.startswith("/"):
        reply_message = set_googlehome_parameters(notify_childroom, message)
        if reply_message:
            line_bot_api.reply_message(event.reply_token, TextSendMessage(text=reply_message))
    else:
        # 毎回音量を最大にする
        if notify_childroom.volume < 1.0:
            notify_childroom.volume = 1.0
            notify_childroom.volume_gain_db = 16.0
        # 声を毎回ランダムに変える
        voice_name = googlehome.get_random_voice()
        notify_childroom.speak(message, None, voice_name)

[Unit]
Description=Smarthome Flask Server
After=network.target

[Service]
ExecStart=/usr/bin/python3 /home/<username>/smarthome/server.py
Restart=always
User=<username>

[Install]
WantedBy=multi-user.target

sudo systemctl enable smarthome_server.service
sudo systemctl start smarthome_server.service