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/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

"use strict";

var EXPORTED_SYMBOLS = ["FormAutofill"];

const { XPCOMUtils } = ChromeUtils.import(
  "resource://gre/modules/XPCOMUtils.jsm"
);
const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");

const ADDRESSES_FIRST_TIME_USE_PREF = "extensions.formautofill.firstTimeUse";
const AUTOFILL_CREDITCARDS_AVAILABLE_PREF =
  "extensions.formautofill.creditCards.available";
const CREDITCARDS_USED_STATUS_PREF = "extensions.formautofill.creditCards.used";
const DEFAULT_REGION_PREF = "browser.search.region";
const ENABLED_AUTOFILL_ADDRESSES_PREF =
  "extensions.formautofill.addresses.enabled";
const ENABLED_AUTOFILL_CREDITCARDS_PREF =
  "extensions.formautofill.creditCards.enabled";
const SUPPORTED_COUNTRIES_PREF = "extensions.formautofill.supportedCountries";

XPCOMUtils.defineLazyPreferenceGetter(
  this,
  "logLevel",
  "extensions.formautofill.loglevel",
  "Warn"
);

// A logging helper for debug logging to avoid creating Console objects
// or triggering expensive JS -> C++ calls when debug logging is not
// enabled.
//
// Console objects, even natively-implemented ones, can consume a lot of
// memory, and since this code may run in every content process, that
// memory can add up quickly. And, even when debug-level messages are
// being ignored, console.debug() calls can be expensive.
//
// This helper avoids both of those problems by never touching the
// console object unless debug logging is enabled.
function debug() {
  if (logLevel.toLowerCase() == "debug") {
    this.log.debug(...arguments);
  }
}

var FormAutofill = {
  ENABLED_AUTOFILL_ADDRESSES_PREF,
  ENABLED_AUTOFILL_CREDITCARDS_PREF,
  ADDRESSES_FIRST_TIME_USE_PREF,
  CREDITCARDS_USED_STATUS_PREF,

  get isAutofillEnabled() {
    return (
      FormAutofill.isAutofillAddressesEnabled ||
      this.isAutofillCreditCardsEnabled
    );
  },
  get isAutofillCreditCardsEnabled() {
    return (
      FormAutofill.isAutofillCreditCardsAvailable &&
      FormAutofill._isAutofillCreditCardsEnabled
    );
  },

  defineLazyLogGetter(scope, logPrefix) {
    scope.debug = debug;

    XPCOMUtils.defineLazyGetter(scope, "log", () => {
      let ConsoleAPI = ChromeUtils.import(
        "resource://gre/modules/Console.jsm",
        {}
      ).ConsoleAPI;
      return new ConsoleAPI({
        maxLogLevelPref: "extensions.formautofill.loglevel",
        prefix: logPrefix,
      });
    });
  },
};

XPCOMUtils.defineLazyPreferenceGetter(
  FormAutofill,
  "DEFAULT_REGION",
  DEFAULT_REGION_PREF,
  "US"
);
XPCOMUtils.defineLazyPreferenceGetter(
  FormAutofill,
  "isAutofillAddressesEnabled",
  ENABLED_AUTOFILL_ADDRESSES_PREF
);
XPCOMUtils.defineLazyPreferenceGetter(
  FormAutofill,
  "isAutofillCreditCardsAvailable",
  AUTOFILL_CREDITCARDS_AVAILABLE_PREF
);
XPCOMUtils.defineLazyPreferenceGetter(
  FormAutofill,
  "_isAutofillCreditCardsEnabled",
  ENABLED_AUTOFILL_CREDITCARDS_PREF
);
XPCOMUtils.defineLazyPreferenceGetter(
  FormAutofill,
  "isAutofillAddressesFirstTimeUse",
  ADDRESSES_FIRST_TIME_USE_PREF
);
XPCOMUtils.defineLazyPreferenceGetter(
  FormAutofill,
  "AutofillCreditCardsUsedStatus",
  CREDITCARDS_USED_STATUS_PREF
);
XPCOMUtils.defineLazyPreferenceGetter(
  FormAutofill,
  "supportedCountries",
  SUPPORTED_COUNTRIES_PREF,
  null,
  null,
  val => val.split(",")
);

// XXX: This should be invalidated on intl:app-locales-changed.
XPCOMUtils.defineLazyGetter(FormAutofill, "countries", () => {
  let availableRegionCodes = Services.intl.getAvailableLocaleDisplayNames(
    "region"
  );
  let displayNames = Services.intl.getRegionDisplayNames(
    undefined,
    availableRegionCodes
  );
  let result = new Map();
  for (let i = 0; i < availableRegionCodes.length; i++) {
    result.set(availableRegionCodes[i].toUpperCase(), displayNames[i]);
  }
  return result;
});