Sync db via ipfs pubsub

[AquiGorka]

Ref: #25

This is a very simple implementation that we can use as base to improve.

This listens to updates from any client and updates local data with anything sent to it via the update.
It does not solve conflicts, it does not check anything.

Data is updated via p2p! Yay!

[chadoh]

Following the pattern I set up in #18, I made Database responsible for doing the room-setup and broadcasting.

[AquiGorka]

This looks interesting: mafintosh/hyperlog#17

[AquiGorka]

I have been having difficulties making this work like yesterday; some researching led me to find that ipfs.pubsub uses a signaling server (libp2p-webrtc-star) - and as it should not be used in production, it may have some restrictions.

I am looking into running our own server to see if this helps with pubsub working too.

[chadoh]

Oh, good call. What happens if we put this all on the same line?

if (this.ipfsNode) return resolve(this._nodeInfo())

[AquiGorka]

I am not sure. It returns the return value from the resolve method (another promise?), if we are dismissing it then this doesn't really matter. Go ahead if you'd rather have it that way.

[chadoh]

I have been having difficulties making this work like yesterday

Is this due to my changes?

[AquiGorka]

No, no, your changes are awesome, thank you for adding structure to my hackish coding, I'm more focused on making things work and I am leaving best practices for later. I think signaling servers have connectivity restrictions, which is why I considered running our own but I still have no proof to that statement - I'll keep researching.

[AquiGorka]

This is working as I originally developed it. I added a first commit with vanilla IPFS pubsub and then added the room abstraction which adds a couple of events that I use to send data to new peers.

[chadoh]

Looks great! I added one small missing thing. Merging!