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// Inspired by https://github.com/tlrobinson/long-stack-traces

const util = require('util');

function extendTrace(object, property, pos) {

const old = object[property];

object[property] = function() {

const error = new Error();

const name = object.constructor.name + '#' + property + '(' +

Array.prototype.slice.call(arguments).map(function(el) {

return util.inspect(el, false, 0);

}).join(', ') + ')';

if (typeof pos === 'undefined') pos = -1;

if (pos < 0) pos += arguments.length;

const cb = arguments[pos];

if (typeof arguments[pos] === 'function') {

arguments[pos] = function replacement() {

const err = arguments[0];

if (err && err.stack && !err.__augmented) {

err.stack = filter(err).join('\n');

err.stack += '\n--> in ' + name;

err.stack += '\n' + filter(error).slice(1).join('\n');

err.__augmented = true;

}

return cb.apply(this, arguments);

};

}

return old.apply(this, arguments);

};

}

exports.extendTrace = extendTrace;

function filter(error) {

return error.stack.split('\n').filter(function(line) {

return line.indexOf(__filename) < 0;

});

}