63 lines
1.9 KiB
JavaScript
63 lines
1.9 KiB
JavaScript
var EventEmitter = require('events');
|
|
|
|
function warnIfLegacy(eventName) {
|
|
const legacyEvents = [];
|
|
if (legacyEvents.indexOf(eventName) >= 0) {
|
|
console.info(__("this event is deprecated and will be removed in future versions %s", eventName));
|
|
}
|
|
}
|
|
|
|
function log(eventType, eventName) {
|
|
if (['end', 'prefinish', 'error', 'new', 'demo', 'block', 'version'].indexOf(eventName) >= 0) {
|
|
return;
|
|
}
|
|
if (eventType.indexOf("log") >= 0) {
|
|
return;
|
|
}
|
|
//console.log(eventType, eventName);
|
|
}
|
|
|
|
EventEmitter.prototype._maxListeners = 350;
|
|
const _on = EventEmitter.prototype.on;
|
|
const _setHandler = EventEmitter.prototype.setHandler;
|
|
|
|
EventEmitter.prototype.on = function(requestName, cb) {
|
|
log("listening to event: ", requestName);
|
|
warnIfLegacy(requestName);
|
|
return _on.call(this, requestName, cb);
|
|
};
|
|
|
|
EventEmitter.prototype.setHandler = function(requestName, cb) {
|
|
log("setting handler for: ", requestName);
|
|
warnIfLegacy(requestName);
|
|
return _setHandler.call(this, requestName, cb);
|
|
};
|
|
|
|
EventEmitter.prototype.request = function() {
|
|
let requestName = arguments[0];
|
|
let other_args = [].slice.call(arguments, 1);
|
|
|
|
log("requesting: ", requestName);
|
|
warnIfLegacy(requestName);
|
|
return this.emit('request:' + requestName, ...other_args);
|
|
};
|
|
|
|
EventEmitter.prototype.setCommandHandler = function(requestName, cb) {
|
|
log("setting command handler for: " + requestName);
|
|
let listener = function(_cb) {
|
|
cb.call(this, ...arguments);
|
|
};
|
|
// unlike events, commands can only have 1 handler
|
|
this.removeAllListeners('request:' + requestName);
|
|
return this.on('request:' + requestName, listener);
|
|
};
|
|
|
|
EventEmitter.prototype.setCommandHandlerOnce = function(requestName, cb) {
|
|
log("setting command handler for: ", requestName);
|
|
return this.once('request:' + requestName, function(_cb) {
|
|
cb.call(this, ...arguments);
|
|
});
|
|
};
|
|
|
|
module.exports = EventEmitter;
|