90 lines
2.6 KiB
JavaScript
90 lines
2.6 KiB
JavaScript
/*
|
|
This file is part of ethereum.js.
|
|
|
|
ethereum.js is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
ethereum.js is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with ethereum.js. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
/** @file filter.js
|
|
* @authors:
|
|
* Jeffrey Wilcke <jeff@ethdev.com>
|
|
* Marek Kotewicz <marek@ethdev.com>
|
|
* Marian Oancea <marian@ethdev.com>
|
|
* Gav Wood <g@ethdev.com>
|
|
* @date 2014
|
|
*/
|
|
|
|
// TODO: is these line is supposed to be here?
|
|
if (process.env.NODE_ENV !== 'build') {
|
|
var web3 = require('./web3'); // jshint ignore:line
|
|
}
|
|
|
|
/// should be used when we want to watch something
|
|
/// it's using inner polling mechanism and is notified about changes
|
|
var Filter = function(options, impl) {
|
|
this.impl = impl;
|
|
this.callbacks = [];
|
|
|
|
var self = this;
|
|
this.promise = impl.newFilter(options);
|
|
this.promise.then(function (id) {
|
|
self.id = id;
|
|
web3.on(impl.changed, id, self.trigger.bind(self));
|
|
web3.provider.startPolling({call: impl.changed, args: [id]}, id);
|
|
});
|
|
};
|
|
|
|
/// alias for changed*
|
|
Filter.prototype.arrived = function(callback) {
|
|
this.changed(callback);
|
|
};
|
|
|
|
/// gets called when there is new eth/shh message
|
|
Filter.prototype.changed = function(callback) {
|
|
var self = this;
|
|
this.promise.then(function(id) {
|
|
self.callbacks.push(callback);
|
|
});
|
|
};
|
|
|
|
/// trigger calling new message from people
|
|
Filter.prototype.trigger = function(messages) {
|
|
for(var i = 0; i < this.callbacks.length; i++) {
|
|
this.callbacks[i].call(this, messages);
|
|
}
|
|
};
|
|
|
|
/// should be called to uninstall current filter
|
|
Filter.prototype.uninstall = function() {
|
|
var self = this;
|
|
this.promise.then(function (id) {
|
|
self.impl.uninstallFilter(id);
|
|
web3.provider.stopPolling(id);
|
|
web3.off(impl.changed, id);
|
|
});
|
|
};
|
|
|
|
/// should be called to manually trigger getting latest messages from the client
|
|
Filter.prototype.messages = function() {
|
|
var self = this;
|
|
return this.promise.then(function (id) {
|
|
return self.impl.getMessages(id);
|
|
});
|
|
};
|
|
|
|
/// alias for messages
|
|
Filter.prototype.logs = function () {
|
|
return this.messages();
|
|
};
|
|
|
|
module.exports = Filter;
|