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index.js
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index.js
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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.
*/
const express = require('express');
const PORT = process.env.PORT || 8080;
const app = express()
.use(express.urlencoded({extended: false}))
.use(express.json());
// [START chat_app_home]
app.post('/', async (req, res) => {
let event = req.body.chat;
let body = {};
if (event.type === 'APP_HOME') {
// App home is requested
body = { action: { navigations: [{
pushCard: getHomeCard()
}]}}
} else if (event.type === 'SUBMIT_FORM') {
// The update button from app home is clicked
commonEvent = req.body.commonEventObject;
if (commonEvent && commonEvent.invokedFunction === 'updateAppHome') {
body = updateAppHome()
}
}
return res.json(body);
});
// Create the app home card
function getHomeCard() {
return { sections: [{ widgets: [
{ textParagraph: {
text: "Here is the app home 🏠 It's " + new Date().toTimeString()
}},
{ buttonList: { buttons: [{
text: "Update app home",
onClick: { action: {
function: "updateAppHome"
}}
}]}}
]}]};
}
// [END chat_app_home]
// [START chat_app_home_update]
// Update the app home
function updateAppHome() {
return { renderActions: { action: { navigations: [{
updateCard: getHomeCard()
}]}}}
};
// [END chat_app_home_update]
app.listen(PORT, () => {
console.log(`Server is running in port - ${PORT}`);
});