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const EventEmitter = require( 'events' ).EventEmitter;
const WebSocket = require( 'ws' );
const keychain = require( '../../../lib/keychain' );
const log = require( '../../../lib/logger' )( 'desktop:notifications:api' );
const { fetchNote, markReadStatus } = require( './notes' );
/*
* Module constants
*/
const pingMs = 30000; // Pinghub ping measured at ~27s during testing
class WPNotificationsAPI extends EventEmitter {
constructor() {
super();
}
heartbeat() {
clearTimeout( this.pingTimeout );
this.pingTimeout = setTimeout( () => {
log.info( 'Websocket heartbeat timed out, attempting to reconnect...' );
this.ws.terminate();
this.connect();
// heartbeat timeout: server ping interval + conservative assumption of latency.
}, pingMs + 1000 );
}
async connect( cookie ) {
// If a cookie value was not explicitly passed in, let's try to fetch it from the keychain
if ( ! cookie ) {
cookie = await keychain.read( 'wp_api_sec' );
}
if ( ! cookie ) {
log.info( 'Failed to initialize websocket: missing wp_api_sec cookie' );
this.ws = null;
return;
}
this.ws = new WebSocket(
'https://public-api.wordpress.com/pinghub/wpcom/me/newest-note-data',
[],
{
headers: {
Origin: `https://public-api.wordpress.com`,
Cookie: `wp_api_sec=${ cookie }`,
},
}
);
this.ws.on( 'open', () => {
log.info( 'Websocket connected' );
this.heartbeat();
} );
this.ws.on( 'ping', () => {
log.debug( 'Websocket ping' );
this.heartbeat();
} );
this.ws.on( 'close', () => {
log.info( 'Websocket disconnected' );
clearTimeout( this.pingTimeout );
} );
this.ws.on( 'error', ( error ) => {
log.info( 'Websocket error: ', error );
} );
this.ws.on( 'message', async ( message ) => {
const json = JSON.parse( message );
log.debug( 'Received message: ', json );
const { note_id: noteId } = json;
if ( ! noteId ) {
return;
}
try {
const note = await fetchNote( noteId );
log.debug( 'Parsed note: ', note );
this.emit( 'note', note );
} catch ( e ) {
log.error( `Failed to fetch note with id: ${ noteId }: `, e );
}
} );
}
async markNoteAsRead( noteId, callback ) {
try {
await markReadStatus( noteId, true );
if ( callback ) {
callback();
}
} catch ( e ) {
log.error( 'Failed to mark note as read:', e );
}
}
disconnect() {
if ( this.ws ) {
this.ws.terminate();
this.ws = null;
}
}
}
module.exports = new WPNotificationsAPI();
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