124 lines
3.1 KiB
JavaScript
124 lines
3.1 KiB
JavaScript
'use strict';
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var soop = require('soop');
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var imports = soop.imports();
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var levelup = require('levelup');
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var config = require('../config/config');
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var Rpc = imports.rpc || require('./Rpc');
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var async = require('async');
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var logger = require('./logger').logger;
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var util = require('util');
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var EventEmitter = require('events').EventEmitter;
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var microtime = require('microtime');
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var bitcore = require('bitcore');
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var AuthMessage = bitcore.AuthMessage;
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var preconditions = require('preconditions').singleton();
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var MESSAGE_PREFIX = 'msg-'; // msg-<recieving_pubkey>-<ts> => <message>
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var MAX_OPEN_FILES = 500;
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var CONCURRENCY = 5;
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var db;
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var MessageDb = function(opts) {
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opts = opts || {};
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this.path = config.leveldb + '/messages' + (opts.name ? ('-' + opts.name) : '');
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this.db = opts.db || db || levelup(this.path, {
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maxOpenFiles: MAX_OPEN_FILES,
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valueEncoding: 'json'
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});
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this.initEvents();
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db = this.db;
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};
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util.inherits(MessageDb, EventEmitter);
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MessageDb.prototype.initEvents = function() {
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if (db) return;
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var self = this;
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this.db.on('put', function(key, value) {
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var data = {};
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data.key = key;
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data.value = value;
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var message = MessageDb.fromStorage(data);
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self.emit('message', message);
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});
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this.db.on('ready', function() {
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//console.log('Database ready!');
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});
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};
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MessageDb.prototype.close = function(cb) {
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this.db.close(cb);
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};
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var messageKey = function(to, ts) {
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preconditions.checkArgument(typeof to === 'string');
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preconditions.checkArgument(to.length === 66);
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preconditions.checkArgument(!ts || typeof ts === 'number');
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if (!ts) ts = Math.round(microtime.now());
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return MESSAGE_PREFIX + to.toString() + '-' + ts;
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};
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MessageDb.prototype.addMessage = function(m, cb) {
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if (!this.authenticate(m)) {
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cb(new Error('Authentication failed'));
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return;
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}
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var key = messageKey(m.to);
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var value = m;
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this.db.put(key, value, cb);
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};
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MessageDb.prototype.authenticate = function(m) {
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preconditions.checkArgument(m.pubkey);
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preconditions.checkArgument(m.sig);
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preconditions.checkArgument(m.encrypted);
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var frompubkey = new Buffer(m.pubkey, 'hex');
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var sig = new Buffer(m.sig, 'hex');
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var encrypted = new Buffer(m.encrypted, 'hex');
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return AuthMessage._verify(frompubkey, sig, encrypted);
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};
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MessageDb.fromStorage = function(data) {
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var spl = data.key.split('-');
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var to = spl[1];
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var ts = +spl[2];
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var message = data.value;
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message.ts = ts;
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message.to = to;
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return message;
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};
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MessageDb.prototype.getMessages = function(to, lower_ts, upper_ts, cb) {
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var list = [];
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lower_ts = lower_ts || 1;
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var opts = {
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end: messageKey(to, lower_ts),
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start: messageKey(to, upper_ts),
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// limit: limit, TODO
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reverse: true,
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};
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db.createReadStream(opts)
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.on('data', function(data) {
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var message = MessageDb.fromStorage(data);
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list.push(message);
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})
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.on('error', function(err) {
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return cb(err);
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})
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.on('end', function() {
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return cb(null, list.reverse());
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});
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};
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MessageDb.prototype.remove = function(ts) {
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};
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module.exports = soop(MessageDb);
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