“use strict”; const util = require(“util”); const ErrorEvent = require(“../generated/ErrorEvent”);

const errorReportingMode = Symbol(“error reporting mode”);

// html.spec.whatwg.org/multipage/webappapis.html#report-the-error // Omits script parameter and any check for muted errors; takes error object, message, and location as params, unlike // the spec. Returns whether the event was handled or not. function reportAnError(line, col, target, errorObject, message, location) {

if (target[errorReportingMode]) {
  return false;
}

target[errorReportingMode] = true;

// TODO Events: use constructor directly, once they are no longer tied to a window.
const event = ErrorEvent.createImpl(["error", {
  bubbles: false,
  cancelable: true,
  message,
  filename: location,
  lineno: line,
  colno: col,
  error: errorObject
}]);

try {
  target.dispatchEvent(event);
} finally {
  target[errorReportingMode] = false;
  return event.defaultPrevented;
}

}

module.exports = function reportException(window, error, filenameHint) {

// This function will give good results on real Error objects with stacks; poor ones otherwise

const stack = error && error.stack;
const lines = stack && stack.split("\n");

// Find the first line that matches; important for multi-line messages
let pieces;
if (lines) {
  for (let i = 1; i < lines.length && !pieces; ++i) {
    pieces = lines[i].match(/at (?:(.+)\s+)?\(?(?:(.+?):(\d+):(\d+)|([^)]+))\)?/);
  }
}

const fileName = pieces && pieces[2] || filenameHint || window._document.URL;
const lineNumber = pieces && parseInt(pieces[3]) || 0;
const columnNumber = pieces && parseInt(pieces[4]) || 0;

const handled = reportAnError(lineNumber, columnNumber, window, error, error.message, fileName);

if (!handled) {
  const errorString = shouldBeDisplayedAsError(error) ? `[${error.name}: ${error.message}]` : util.inspect(error);
  const jsdomError = new Error(`Uncaught ${errorString}`);
  jsdomError.detail = error;
  jsdomError.type = "unhandled exception";

  window._virtualConsole.emit("jsdomError", jsdomError);
}

};

function shouldBeDisplayedAsError(x) {

return x.name && x.message !== undefined && x.stack;

}