alexa-ability-stash

An alexa-ability middleware for persistent user storage.

Warning: Still in development. Not suitable for use in production yet.

Example

import { Ability } from 'alexa-ability';
import { handleAbility } from 'alexa-ability-lambda-handler';
import createStash from 'alexa-ability-stash';
import createRedisStore from 'connect-redis'; // or any compatible express-session store

const RedisStore = createRedisStore(createStash);
const store = new RedisStore(options);
const app = new Ability();

app.use(createStash({ store }));

app.on('LuckyNumberIntent', function(req, next) {
    if (!req.stash.luckyNumber) {
        // persisted "forever"
        req.stash.luckyNumber = Math.floor(Math.random() * 100 + 1);
    }

    req.say(`Your lucky number is ${req.stash.luckyNumber}!`).end();
});

export const handler = handleAbility(app);

API

createStash(options) -> middleware

Creates a middleware function to handle the stash.

Takes the following options:

• store - one of the stores defined below
• genid - a function that takes a request object and returns a string. Returns <appId>:<userId> by default.
• unset - Behavior when req.stash is deleted. destroy or keep. Defaults to keep.
  • keep The stash will be kept, but modifications made during the request are ignored and not saved.
  • destroy: The stash will be destroyed (deleted) when the response ends.
• resave Forces the stash to be saved, even if the stash was never modified. Defaults to true.

Attaches two properties to the request object:

• stash an object you can read and modify. Changes will be saved across requests.
• stashId the id generated by genid.

Stores

Theoretically all the store supported by express-session should work. In practice, only connect-redis has been tested.

If a store doesn't work for you raise an issue!