MySQL session for fb-bot-kit

MySQL powered session for fb-bot-kit. forked from telegraf-session-mysql. Saves session both on mysql and in memory and use memory where possible.

Installation

$ npm install fb-bot-kit-session

Setup

you should create a table named sessions in your database.

CREATE TABLE `sessions` (
  `id` varchar(100) NOT NULL,
  `session` longtext NOT NULL,
  PRIMARY KEY (`id`))

Example

const Session = require('fb-bot-kit-session')
const mysqlSession = new Session({
  host: 'localhost',
  user: 'user',
  password: 'pass',
  database: 'session_db'
});

handleFacebookData(data) {
    data.entry.forEach((entry) => {
      entry.messaging.forEach(async(event) => {
        await mysqlSession.init(event)
        ...
      });
    });
  }

When you have stored the session key beforehand, you can access a session without having access to a context object. This is useful when you perform OAUTH or something similar, when a REDIRECT_URI is called on your bot server.

const mysqlSession = new Session()

// Retrieve session state by session key
mysqlSession.getSession(key)
  .then((session) => {
    console.log('Session state', session)
  })

// Save session state
mysqlSession.saveSession(key, session)

API

Options

• host: hostname of mysql server
• user: username
• password: user password
• database: Database name
• property: context property name (default: session)
• getSessionKey: session key function (ctx) => any)

Default implementation of getSessionKey:

function getSessionKey(ctx) {
  if (!ctx.from || !ctx.chat) {
    return
  }
  return `${ctx.from.id}:${ctx.chat.id}`
}

Destroying a session

To destroy a session simply set it to null.

bot.on('text', (ctx) => {
  ctx.session = null
})