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Pinion.ts
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Pinion.ts
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/**
* @file Pinion The main class. It is responsible for the vast amount of communication
* with the client and starting up the other instances. It also creates and
* distributes the shared event bus.
*/
import assert = require('assert');
import debug = require('debug');
import EventEmitter = require('events');
import { Entry } from 'ipfs-log';
import IPFS from 'ipfs';
import { ClientActions, PinnerActions } from './actions';
import StoreManager from './StoreManager';
import IPFSNode from './IPFSNode';
const log = debug('pinion:pinion');
const { REPLICATE, PIN_HASH, ANNOUNCE_CLIENT } = ClientActions;
const { HAVE_HEADS, ANNOUNCE_PINNER } = PinnerActions;
interface ClientActionPayload {
ipfsHash?: string;
address?: string;
}
export interface ClientAction {
type: ClientActions;
payload: ClientActionPayload;
}
interface ReplicationEvent {
address: string;
heads: Entry[];
peer: string;
}
interface ReplicationMessagePayload {
address: string;
count: number;
timestamp: number;
}
interface Options {
ipfsPrivateKey?: string;
ipfsRepo?: string;
maxOpenStores?: number;
orbitDBDir?: string;
}
class Pinion {
private readonly ipfsNode: IPFSNode;
private readonly storeManager: StoreManager;
// We would like to use it in the tests, so it's public
public readonly events: EventEmitter;
constructor(
room: string,
{
maxOpenStores = 100,
ipfsPrivateKey,
ipfsRepo = './ipfs',
orbitDBDir = './orbitdb',
}: Options = {},
) {
assert(room && room.length, 'Pinning room is required for pinion to start');
this.events = new EventEmitter();
this.ipfsNode = new IPFSNode(this.events, room, {
repo: ipfsRepo,
privateKey: ipfsPrivateKey,
});
this.storeManager = new StoreManager(this.events, this.ipfsNode, {
maxOpenStores,
orbitDBDir,
});
this.events.on('pubsub:message', this.handleMessage);
this.events.on('pubsub:newpeer', this.handleNewPeer);
}
public get openStores(): number {
return this.storeManager.openStores;
}
private handleMessage = async (
message: IPFS.PubsubMessage,
): Promise<void> => {
let action: ClientAction | undefined;
try {
action = JSON.parse(message.data.toString());
} catch (e) {
log('Could not parse pinner message: %O', message.data);
}
if (!action) return;
const { type, payload } = action;
const { ipfsHash, address } = payload;
switch (type) {
case ANNOUNCE_CLIENT: {
try {
await this.announce();
} catch (caughtError) {
console.error(caughtError);
}
break;
}
case PIN_HASH: {
if (!ipfsHash) {
if (log.enabled) {
// Only stringify when absolutely necessary
log('PIN_HASH: no ipfsHash given: %O', message.data.toString());
}
return;
}
this.ipfsNode.pinHash(ipfsHash).catch(console.error);
break;
}
case REPLICATE: {
if (!address) {
log('REPLICATE: no address given: %O', message.data);
return;
}
try {
const heads = await this.storeManager.loadStore(address);
await this.publishHeads(address, heads);
} catch (caughtError) {
console.error(caughtError);
}
break;
}
default:
break;
}
};
private handleNewPeer = (): void => {
this.announce().catch(console.error);
};
private async announce(): Promise<void> {
return this.ipfsNode.publish({
type: ANNOUNCE_PINNER,
payload: {
ipfsId: await this.getId(),
},
});
}
private publishHeads = async (
address: string,
count: number,
): Promise<void> => {
return this.ipfsNode.publish<'HAVE_HEADS', ReplicationMessagePayload>({
type: HAVE_HEADS,
to: address,
payload: {
address,
count,
timestamp: Date.now(),
},
});
};
public async start(): Promise<void> {
await this.ipfsNode.start();
log('Pinner id: %s', this.ipfsNode.id);
await this.storeManager.start();
await this.announce(); // Announce on start because the room may have peers already
}
public async getId(): Promise<string> {
return this.ipfsNode.getId();
}
public async close(): Promise<void> {
log('Closing...');
await this.storeManager.stop();
await this.ipfsNode.stop();
this.events.removeAllListeners();
}
}
export default Pinion;