Rework quick unlock settings to follow new specs.

chrome/browser/resources/settings/people_page/quick_unlock_setup_pin.js

-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-/**
- * @fileoverview
- * 'settings-quick-unlock-setup-pin' is the settings page for choosing a PIN.
- *
- * Example:
- *
- * <settings-quick-unlock-setup-pin set-modes="[[quickUnlockSetModes]]">
- * </settings-quick-unlock-setup-pin>
- */
-
-(function() {
-'use strict';
-
-/**
- * Metainformation about a problem message to pass to showProblem. |class| is
- * the css class to show the problem message with. |messageId| is the i18n
- * string id to use.
- * @const
- */
-var ProblemInfo = {
-  TOO_SHORT: {
-    messageId: 'quickUnlockConfigurePinChoosePinTooShort',
-    class: 'error'
-  },
-  WEAK: {
-    messageId: 'quickUnlockConfigurePinChoosePinWeakPinWarning',
-    class: 'warning'
-  },
-  MISMATCHED: {
-    messageId: 'quickUnlockConfigurePinMismatchedPins',
-    class: 'error'
-  }
-};
-
-/**
- * A list of the top-10 most commmonly used PINs. This list is taken from
- * www.datagenetics.com/blog/september32012/.
- * @const
- */
-var WEAK_PINS = [
-  '1234', '1111', '0000', '1212', '7777', '1004', '2000', '4444', '2222',
-  '6969'
-];
-
-Polymer({
-  is: 'settings-quick-unlock-setup-pin',
-
-  behaviors: [
-    I18nBehavior,
-    QuickUnlockPasswordDetectBehavior,
-    settings.RouteObserverBehavior
-  ],
-
-  properties: {
-    /**
-     * The current PIN keyboard value.
-     * @private
-     */
-    pinKeyboardValue_: String,
-
-    /**
-     * Stores the initial PIN value so it can be confirmed.
-     * @private
-     */
-    initialPin_: String,
-
-    /**
-     * The actual problem message to display.
-     * @private
-     */
-    problemMessage_: String,
-
-    /**
-     * The type of problem class to show (warning or error).
-     */
-    problemClass_: String,
-
-    /**
-     * Should the step-specific submit button be displayed?
-     * @private
-     */
-    enableSubmit_: Boolean,
-
-    /**
-     * The current step/subpage we are on.
-     * @private
-     */
-    isConfirmStep_: {
-      type: Boolean,
-      value: false
-    },
-  },
-
-  observers: ['onSetModesChanged_(setModes)'],
-
-  /** @override */
-  attached: function() {
-    this.resetState_();
-
-    if (settings.getCurrentRoute() == settings.Route.QUICK_UNLOCK_SETUP_PIN)
-      this.askForPasswordIfUnset();
-  },
-
-  /** @protected */
-  currentRouteChanged: function() {
-    if (settings.getCurrentRoute() == settings.Route.QUICK_UNLOCK_SETUP_PIN) {
-      this.askForPasswordIfUnset();
-    } else {
-      // If the user hits the back button, they can leave the element
-      // half-completed; therefore, reset state if the element is not active.
-      this.resetState_();
-    }
-  },
-
-  /** @private */
-  onSetModesChanged_: function() {
-    if (settings.getCurrentRoute() == settings.Route.QUICK_UNLOCK_SETUP_PIN)
-      this.askForPasswordIfUnset();
-  },
-
-  /**
-   * Resets the element to the initial state.
-   * @private
-   */
-  resetState_: function() {
-    this.initialPin_ = '';
-    this.pinKeyboardValue_ = '';
-    this.enableSubmit_ = false;
-    this.isConfirmStep_ = false;
-    this.onPinChange_();
-  },
-
-  /**
-   * Returns true if the given PIN is likely easy to guess.
-   * @private
-   * @param {string} pin
-   * @return {boolean}
-   */
-  isPinWeak_: function(pin) {
-    // Warn if it's a top-10 pin.
-    if (WEAK_PINS.includes(pin))
-      return true;
-
-    // Warn if the PIN is consecutive digits.
-    var delta = 0;
-    for (var i = 1; i < pin.length; ++i) {
-      var prev = Number(pin[i - 1]);
-      var num = Number(pin[i]);
-      if (Number.isNaN(prev) || Number.isNaN(num))
-        return false;
-      delta = Math.max(delta, Math.abs(num - prev));
-    }
-
-    return delta <= 1;
-  },
-
-  /**
-   * Returns true if the given PIN matches PIN requirements, such as minimum
-   * length.
-   * @private
-   * @param {string|undefined} pin
-   * @return {boolean}
-   */
-  isPinLongEnough_: function(pin) {
-    return !!pin && pin.length >= 4;
-  },
-
-  /**
-   * Returns true if the PIN is ready to be changed to a new value.
-   * @private
-   * @return {boolean}
-   */
-  canSubmit_: function() {
-    return this.isPinLongEnough_(this.pinKeyboardValue_) &&
-           this.initialPin_ == this.pinKeyboardValue_;
-  },
-
-  /**
-   * Notify the user about a problem.
-   * @private
-   * @param {!{messageId: string, class: string}} problemInfo
-   */
-  showProblem_: function(problemInfo) {
-    this.problemMessage_ = this.i18n(problemInfo.messageId);
-    this.problemClass_ = problemInfo.class;
-    this.updateStyles();
-  },
-
-  /** @private */
-  hideProblem_: function() {
-    this.problemMessage_ = '';
-    this.problemClass_ = '';
-  },
-
-  /** @private */
-  onPinChange_: function() {
-    if (!this.isConfirmStep_) {
-      var isPinLongEnough = this.isPinLongEnough_(this.pinKeyboardValue_);
-      var isWeak = isPinLongEnough && this.isPinWeak_(this.pinKeyboardValue_);
-
-      if (!isPinLongEnough && this.pinKeyboardValue_)
-        this.showProblem_(ProblemInfo.TOO_SHORT);
-      else if (isWeak)
-        this.showProblem_(ProblemInfo.WEAK);
-      else
-        this.hideProblem_();
-
-      this.enableSubmit_ = isPinLongEnough;
-
-    } else {
-      var canSubmit = this.canSubmit_();
-
-      if (!canSubmit && this.pinKeyboardValue_)
-        this.showProblem_(ProblemInfo.MISMATCHED);
-      else
-        this.hideProblem_();
-
-      this.enableSubmit_ = canSubmit;
-    }
-  },
-
-  /** @private */
-  onPinSubmit_: function() {
-    if (!this.isConfirmStep_) {
-      if (this.isPinLongEnough_(this.pinKeyboardValue_)) {
-        this.initialPin_ = this.pinKeyboardValue_;
-        this.pinKeyboardValue_ = '';
-        this.isConfirmStep_ = true;
-        this.onPinChange_();
-      }
-    } else {
-      // onPinSubmit_ gets called if the user hits enter on the PIN keyboard.
-      // The PIN is not guaranteed to be valid in that case.
-      if (!this.canSubmit_())
-        return;
-
-      function onSetModesCompleted(didSet) {
-        if (!didSet) {
-          console.error('Failed to update pin');
-          return;
-        }
-
-        this.resetState_();
-        settings.navigateTo(settings.Route.QUICK_UNLOCK_CHOOSE_METHOD);
-      }
-
-      this.setModes.call(
-        null,
-        [chrome.quickUnlockPrivate.QuickUnlockMode.PIN],
-        [this.pinKeyboardValue_],
-        onSetModesCompleted.bind(this));
-    }
-  },
-
-  /**
-   * @private
-   * @param {string} problemMessage
-   * @return {boolean}
-   */
-  hasProblem_: function(problemMessage) {
-    return !!problemMessage;
-  },
-
-  /**
-   * @private
-   * @param {boolean} isConfirmStep
-   * @return {string}
-   */
-  getTitleMessage_: function(isConfirmStep) {
-    if (!isConfirmStep)
-      return this.i18n('quickUnlockConfigurePinChoosePinTitle');
-    return this.i18n('quickUnlockConfigurePinConfirmPinTitle');
-  },
-
-  /**
-   * @private
-   * @param {boolean} isConfirmStep
-   * @return {string}
-   */
-  getContinueMessage_: function(isConfirmStep) {
-    if (!isConfirmStep)
-      return this.i18n('quickUnlockConfigurePinContinueButton');
-    return this.i18n('save');
-  },
-});
-
-})();