manage accounts with leveldb

To create a user, we can just do:

var accountdown = require('accountdown');
var level = require('level');
var db = level('/tmp/users.db');

var users = accountdown(db, {
    login: { basic: require('accountdown-basic') }
});

var opts = {
    login: { basic: { username: 'substack', password: 'beep boop' } },
    value: { bio: 'beep boop' }
};
users.create('substack', opts, function (err) {
    if (err) console.error(err);
});

The string we gave to users.create() need not necessarily match the username credential. You might want to use a uid integer for example. In either case you will get implicitly encforced unique names because if a username already exists the users.create() call will fail even if the id is available and likewise if an id is unavailable but a username is available.

To verify a credential:

var accountdown = require('accountdown');
var level = require('level');
var db = level('/tmp/users.db');

var users = accountdown(db, {
    login: { basic: require('accountdown-basic') }
});

var creds = { username: 'substack', password: 'beep boop' };
users.verify('basic', creds, function (err, ok) {
    if (err) console.error(err)
    else console.log('verified:', ok)
});

var accountdown = require('accountdown')

Create a new account instance users given a leveldb database handle db and some options opts.

opts can be:

• opts.login - map of type names to login plugin functions
• opts.valueEncoding - value encoding to use, 'json' by default

Create a user by an id.

Get the data for a username

Register a login plugin at a string name type.

Login plugins such as accountdown-basic should export a single function that will be created with db and prefix arguments and should return an object with .verify() and .create() functions:

module.exports = function (db, prefix) {
    return {
        verify: function (creds, cb) {
            // calls cb(err, success, id)
        },
        create: function (id, creds) {
            // returns an array of batch rows
        }
    };
};

Check whether creds are valid login credentials. cb(err, success, id) fires with any errors, the success as a boolean, and the user id.

Return an array of rows to batch insert if and only if all the keys do not already exist using level-create-batch.