node-red-contrib-chatbot
Version:
REDBot a Chat bot for a full featured chat bot for Telegram, Facebook Messenger and Slack. Almost no coding skills required
112 lines (101 loc) • 3.88 kB
JavaScript
const _ = require('underscore');
const { ChatExpress } = require('chat-platform');
const MessageTemplate = require('../lib/message-template-async');
const RegisterType = require('../lib/node-installer');
const validators = require('../lib/helpers/validators');
const fetchers = require('../lib/helpers/fetchers-obj');
const {
enrichFilePayload,
isValidMessage,
getChatId,
getMessageId,
getTransport,
extractValue,
appendPayload
} = require('../lib/helpers/utils');
const GlobalContextHelper = require('../lib/helpers/global-context-helper');
module.exports = function(RED) {
const registerType = RegisterType(RED);
const globalContextHelper = GlobalContextHelper(RED);
function ChatBotAudio(config) {
RED.nodes.createNode(this, config);
const node = this;
globalContextHelper.init(this.context().global);
this.audio = config.audio;
this.duration = config.duration;
this.caption = config.caption;
this.name = config.name;
this.on('input', function(msg, send, done) {
// send/done compatibility for node-red < 1.0
send = send || function() { node.send.apply(node, arguments) };
done = done || function(error) { node.error.call(node, error, msg) };
const sendPayload = appendPayload(send, msg);
const chatId = getChatId(msg);
const messageId = getMessageId(msg);
const transport = getTransport(msg);
const template = MessageTemplate(msg, node);
// check if valid message
if (!isValidMessage(msg, node)) {
return;
}
// check transport compatibility
if (!ChatExpress.isSupported(transport, 'audio')) {
return;
}
let content = extractValue('string', 'audio', node, msg)
|| extractValue('buffer', 'audio', node, msg)
|| extractValue('stringWithVariables', 'audio', node, msg)
|| extractValue('filepath', 'filename', node, msg, false, true, false); // no payload, yes message
let caption = extractValue('string', 'caption', node, msg, false);
let duration = extractValue('number', 'duration', node, msg);
template({ content, caption })
.then(({ content, caption }) => {
// get the content
let fetcher = null;
if (validators.filepath(content)) {
fetcher = fetchers.file;
} else if (validators.url(content)) {
fetcher = fetchers.url;
} else if (validators.buffer(content)) {
fetcher = fetchers.identity;
} else if (_.isString(content) && content.length > 4064) {
done('Looks like you are passing a very long string (> 4064 bytes) in the payload as image url or path\n'
+ 'Perhaps you are using a "Http request" and passing the result as string instead of buffer?');
return;
} else {
done('Don\'t know how to handle: ' + content);
return;
}
fetcher(content)
.then(file => enrichFilePayload(file, msg, node))
.then(file => {
// check if a valid file
const error = ChatExpress.isValidFile(transport, 'audio', file);
if (error != null) {
done(error);
throw error;
}
return file;
})
.then(
file => {
// send out reply
sendPayload({
type: 'audio',
content: file.buffer,
caption,
duration,
filename: file.filename,
chatId: chatId,
messageId: messageId,
inbound: false
});
done();
},
error => done(error)
);
});
});
}
registerType('chatbot-audio', ChatBotAudio);
};