redis magic

redis.js

	overwrite(id, obj) {
		client.del(`${id}-creation`, () => {
			client.HMSET(`${id}-creation`, obj)
		})
	},

	update(id, obj) {
		client.HMSET(`${id}-creation`, obj)
	},

	get(id, cb) {
		client.hgetall(`${id}-creation`, (err, obj) => {
			if (err) console.log(err)
			cb(obj || {})
		})
	},

	modify(id, toSet, value, cb) {
		client.hgetall(`${id}-creation`, (err, obj) => {
			if (obj) {
				obj[toSet] = value 
			} else {
				obj = {};
				obj[toSet] = value 
			}	
			this.update(id, obj)
			if (cb) cb(obj)
		})
	},