blob: be6b62a8a7ad0347b86811a88d84a49ff0775941 [file] [log] [blame]
// Copyright 2015 The Vanadium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
var jsonStableStringify = require('json-stable-stringify');
module.exports = {
getMethodData: getMethodData,
hashInterface: hashInterface
};
/*
* Given a service interface and method name, retrieve the method signature.
* @param {interface} interface The service interface
* @param {string} methodName The name of the method.
* @return {methodSig} An object containing info about the method.
*/
function getMethodData(interface, methodName) {
for (var i = 0; i < interface.methods.length; i++) {
var methodData = interface.methods[i];
if (methodData.name === methodName) {
return methodData;
}
}
return null;
}
/*
* Given a service signature, compute a reasonable hash that uniquely identifies
* a service without containing unnecessary information.
* This heuristic comes extremely close to uniquely identifying service methods.
*/
function hashInterface(interface) {
var pkgPath = interface.pkgPath + '.' + interface.name;
var methods = interface.methods.map(function(methodData) {
return {
name: methodData.name,
inArgs: methodData.inArgs.map(function(inArg) {
return inArg.name;
})
};
});
var output = jsonStableStringify([pkgPath, methods]);
return output;
}