node-telegram-api/lib/types/Base.js

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import {EventEmitter} from 'events';
/**
* Base class of all classes
*/
export default class Base extends EventEmitter {
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constructor(method) {
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super();
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this.method = method;
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this.properties = {};
}
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/**
* Sends the message, you should only use this method yourself if
* you are extending this class. Normally you should call bot.send(message)
*
* Events: message:sent => Emitted after sending the message to API, gets the
* API's response
*
* message:answer => Emitted when your message gets an answer from
* the contact (reply in case of groups)
* gets the Update object containing message
*
* @param {object} bot
* @return {promise} returns a promise, resolved with message:answer
*/
send(bot) {
if (this._keyboard) {
const reply_markup = JSON.stringify(this._keyboard.getProperties());
this.properties.reply_markup = reply_markup;
}
let messageId;
return new Promise(resolve => {
bot.api[this.method](this.properties).then(response => {
messageId = response.result.message_id;
this.emit('message:sent', response);
});
if (this._keyboard.one_time_keyboard) {
this._keyboard.replyMarkup = '';
}
const chat = this.properties.chat_id;
bot.on('update', function listener(result) {
const update = result.find(({message}) => {
// if in a group, there will be a reply to this message
if (chat < 0) {
return message.chat.id === chat
&& message.reply_to_message
&& message.reply_to_message.message_id === messageId;
} else {
return message.chat.id === chat;
}
});
if (update) {
resolve(update.message);
this.emit('message:answer', update.message);
bot.removeListener('update', listener);
}
});
});
}
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/**
* Returns properties of the object
* @return {object} properties of object
*/
getProperties() {
return this.properties;
}
/**
* Set properties of the object
* @param {object} object properties to set
* @param {boolean} extend A boolean indicating if the properties should be
* extended by the object provided (Object.assign)
* or properties should be replaced by the object
* defaults to true
* @return {object} returns the properties (same as getProperties)
*/
setProperties(object, extend = true) {
this.properties = extend ? Object.assign(this.properties, object)
: object;
return this.getProperties();
}
}