polygerrit-ui/app/elements/change/gr-reply-dialog/gr-reply-dialog.js - gerrit - Git at Google

 /**
  * @license
  * Copyright (C) 2016 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 (function() {
   'use strict';

   const STORAGE_DEBOUNCE_INTERVAL_MS = 400;

   const FocusTarget = {
     ANY: 'any',
     BODY: 'body',
     CCS: 'cc',
     REVIEWERS: 'reviewers',
   };

   const ReviewerTypes = {
     REVIEWER: 'REVIEWER',
     CC: 'CC',
   };

   const LatestPatchState = {
     LATEST: 'latest',
     CHECKING: 'checking',
     NOT_LATEST: 'not-latest',
   };

   const ButtonLabels = {
     START_REVIEW: 'Start review',
     SEND: 'Send',
   };

   const ButtonTooltips = {
     SAVE: 'Save reply but do not send notification',
     START_REVIEW: 'Mark as ready for review and send reply',
     SEND: 'Send reply',
   };

   const EMPTY_REPLY_MESSAGE = 'Cannot send an empty reply.';

   const SEND_REPLY_TIMING_LABEL = 'SendReply';

   Polymer({
     is: 'gr-reply-dialog',
     _legacyUndefinedCheck: true,

     /**
      * Fired when a reply is successfully sent.
      *
      * @event send
      */

     /**
      * Fired when the user presses the cancel button.
      *
      * @event cancel
      */

     /**
      * Fired when the main textarea's value changes, which may have triggered
      * a change in size for the dialog.
      *
      * @event autogrow
      */

     /**
      * Fires to show an alert when a send is attempted on the non-latest patch.
      *
      * @event show-alert
      */

     /**
      * Fires when the reply dialog believes that the server side diff drafts
      * have been updated and need to be refreshed.
      *
      * @event comment-refresh
      */

      /**
       * Fires when the state of the send button (enabled/disabled) changes.
       *
       * @event send-disabled-changed
       */

     properties: {
       /**
        * @type {{ _number: number, removable_reviewers: Array }}
        */
       change: Object,
       patchNum: String,
       canBeStarted: {
         type: Boolean,
         value: false,
       },
       disabled: {
         type: Boolean,
         value: false,
         reflectToAttribute: true,
       },
       draft: {
         type: String,
         value: '',
         observer: '_draftChanged',
       },
       quote: {
         type: String,
         value: '',
       },
       diffDrafts: {
         type: Object,
         observer: '_handleHeightChanged',
       },
       /** @type {!Function} */
       filterReviewerSuggestion: {
         type: Function,
         value() {
           return this._filterReviewerSuggestionGenerator(false);
         },
       },
       /** @type {!Function} */
       filterCCSuggestion: {
         type: Function,
         value() {
           return this._filterReviewerSuggestionGenerator(true);
         },
       },
       permittedLabels: Object,
       /**
        * @type {{ commentlinks: Array }}
        */
       projectConfig: Object,
       knownLatestState: String,
       underReview: {
         type: Boolean,
         value: true,
       },

       _account: Object,
       _ccs: Array,
       /** @type {?Object} */
       _ccPendingConfirmation: {
         type: Object,
         observer: '_reviewerPendingConfirmationUpdated',
       },
       _messagePlaceholder: {
         type: String,
         computed: '_computeMessagePlaceholder(canBeStarted)',
       },
       _owner: Object,
       /** @type {?} */
       _pendingConfirmationDetails: Object,
       _includeComments: {
         type: Boolean,
         value: true,
       },
       _reviewers: Array,
       /** @type {?Object} */
       _reviewerPendingConfirmation: {
         type: Object,
         observer: '_reviewerPendingConfirmationUpdated',
       },
       _previewFormatting: {
         type: Boolean,
         value: false,
         observer: '_handleHeightChanged',
       },
       _reviewersPendingRemove: {
         type: Object,
         value: {
           CC: [],
           REVIEWER: [],
         },
       },
       _sendButtonLabel: {
         type: String,
         computed: '_computeSendButtonLabel(canBeStarted)',
       },
       _savingComments: Boolean,
       _reviewersMutated: {
         type: Boolean,
         value: false,
       },
       _labelsChanged: {
         type: Boolean,
         value: false,
       },
       _saveTooltip: {
         type: String,
         value: ButtonTooltips.SAVE,
         readOnly: true,
       },
       _pluginMessage: {
         type: String,
         value: '',
       },
       _sendDisabled: {
         type: Boolean,
         computed: '_computeSendButtonDisabled(_sendButtonLabel, diffDrafts, ' +
             'draft, _reviewersMutated, _labelsChanged, _includeComments, ' +
             'disabled)',
         observer: '_sendDisabledChanged',
       },
     },

     FocusTarget,

     behaviors: [
       Gerrit.BaseUrlBehavior,
       Gerrit.FireBehavior,
       Gerrit.KeyboardShortcutBehavior,
       Gerrit.PatchSetBehavior,
       Gerrit.RESTClientBehavior,
     ],

     keyBindings: {
       'esc': '_handleEscKey',
       'ctrl+enter meta+enter': '_handleEnterKey',
     },

     observers: [
       '_changeUpdated(change.reviewers.*, change.owner)',
       '_ccsChanged(_ccs.splices)',
       '_reviewersChanged(_reviewers.splices)',
     ],

     attached() {
       this._getAccount().then(account => {
         this._account = account || {};
       });
     },

     ready() {
       this.$.jsAPI.addElement(this.$.jsAPI.Element.REPLY_DIALOG, this);
     },

     open(opt_focusTarget) {
       this.knownLatestState = LatestPatchState.CHECKING;
       this.fetchChangeUpdates(this.change, this.$.restAPI)
           .then(result => {
             this.knownLatestState = result.isLatest ?
                 LatestPatchState.LATEST : LatestPatchState.NOT_LATEST;
           });

       this._focusOn(opt_focusTarget);
       if (this.quote && this.quote.length) {
         // If a reply quote has been provided, use it and clear the property.
         this.draft = this.quote;
         this.quote = '';
       } else {
         // Otherwise, check for an unsaved draft in localstorage.
         this.draft = this._loadStoredDraft();
       }
       if (this.$.restAPI.hasPendingDiffDrafts()) {
         this._savingComments = true;
         this.$.restAPI.awaitPendingDiffDrafts().then(() => {
           this.fire('comment-refresh');
           this._savingComments = false;
         });
       }
     },

     focus() {
       this._focusOn(FocusTarget.ANY);
     },

     getFocusStops() {
       const end = this._sendDisabled ? this.$.cancelButton : this.$.sendButton;
       return {
         start: this.$.reviewers.focusStart,
         end,
       };
     },

     setLabelValue(label, value) {
       const selectorEl =
           this.$.labelScores.$$(`gr-label-score-row[name="${label}"]`);
       if (!selectorEl) { return; }
       selectorEl.setSelectedValue(value);
     },

     getLabelValue(label) {
       const selectorEl =
           this.$.labelScores.$$(`gr-label-score-row[name="${label}"]`);
       if (!selectorEl) { return null; }

       return selectorEl.selectedValue;
     },

     _handleEscKey(e) {
       this.cancel();
     },

     _handleEnterKey(e) {
       this._submit();
     },

     _ccsChanged(splices) {
       this._reviewerTypeChanged(splices, ReviewerTypes.CC);
     },

     _reviewersChanged(splices) {
       this._reviewerTypeChanged(splices, ReviewerTypes.REVIEWER);
     },

     _reviewerTypeChanged(splices, reviewerType) {
       if (splices && splices.indexSplices) {
         this._reviewersMutated = true;
         this._processReviewerChange(splices.indexSplices,
             reviewerType);
         let key;
         let index;
         let account;
         // Remove any accounts that already exist as a CC for reviewer
         // or vice versa.
         const isReviewer = ReviewerTypes.REVIEWER === reviewerType;
         for (const splice of splices.indexSplices) {
           for (let i = 0; i < splice.addedCount; i++) {
             account = splice.object[splice.index + i];
             key = this._accountOrGroupKey(account);
             const array = isReviewer ? this._ccs : this._reviewers;
             index = array.findIndex(
                 account => this._accountOrGroupKey(account) === key);
             if (index >= 0) {
               this.splice(isReviewer ? '_ccs' : '_reviewers', index, 1);
               const moveFrom = isReviewer ? 'CC' : 'reviewer';
               const moveTo = isReviewer ? 'reviewer' : 'CC';
               const message = (account.name || account.email || key) +
                   ` moved from ${moveFrom} to ${moveTo}.`;
               this.fire('show-alert', {message});
             }
           }
         }
       }
     },

     _processReviewerChange(indexSplices, type) {
       for (const splice of indexSplices) {
         for (const account of splice.removed) {
           if (!this._reviewersPendingRemove[type]) {
             console.err('Invalid type ' + type + ' for reviewer.');
             return;
           }
           this._reviewersPendingRemove[type].push(account);
         }
       }
     },

     /**
      * Resets the state of the _reviewersPendingRemove object, and removes
      * accounts if necessary.
      *
      * @param {boolean} isCancel true if the action is a cancel.
      * @param {Object=} opt_accountIdsTransferred map of account IDs that must
      *     not be removed, because they have been readded in another state.
      */
     _purgeReviewersPendingRemove(isCancel, opt_accountIdsTransferred) {
       let reviewerArr;
       const keep = opt_accountIdsTransferred || {};
       for (const type in this._reviewersPendingRemove) {
         if (this._reviewersPendingRemove.hasOwnProperty(type)) {
           if (!isCancel) {
             reviewerArr = this._reviewersPendingRemove[type];
             for (let i = 0; i < reviewerArr.length; i++) {
               if (!keep[reviewerArr[i]._account_id]) {
                 this._removeAccount(reviewerArr[i], type);
               }
             }
           }
           this._reviewersPendingRemove[type] = [];
         }
       }
     },

     /**
      * Removes an account from the change, both on the backend and the client.
      * Does nothing if the account is a pending addition.
      *
      * @param {!Object} account
      * @param {string} type
      *
      * * TODO(beckysiegel) submit Polymer PR
      * @suppress {checkTypes}
      */
     _removeAccount(account, type) {
       if (account._pendingAdd) { return; }

       return this.$.restAPI.removeChangeReviewer(this.change._number,
           account._account_id).then(response => {
             if (!response.ok) { return response; }

             const reviewers = this.change.reviewers[type] || [];
             for (let i = 0; i < reviewers.length; i++) {
               if (reviewers[i]._account_id == account._account_id) {
                 this.splice(['change', 'reviewers', type], i, 1);
                 break;
               }
             }
           });
     },

     _mapReviewer(reviewer) {
       let reviewerId;
       let confirmed;
       if (reviewer.account) {
         reviewerId = reviewer.account._account_id || reviewer.account.email;
       } else if (reviewer.group) {
         reviewerId = reviewer.group.id;
         confirmed = reviewer.group.confirmed;
       }
       return {reviewer: reviewerId, confirmed};
     },

     send(includeComments, startReview) {
       this.$.reporting.time(SEND_REPLY_TIMING_LABEL);
       const labels = this.$.labelScores.getLabelValues();

       const obj = {
         drafts: includeComments ? 'PUBLISH_ALL_REVISIONS' : 'KEEP',
         labels,
       };

       if (startReview) {
         obj.ready = true;
       }

       if (this.draft != null) {
         obj.message = this.draft;
       }

       const accountAdditions = {};
       obj.reviewers = this.$.reviewers.additions().map(reviewer => {
         if (reviewer.account) {
           accountAdditions[reviewer.account._account_id] = true;
         }
         return this._mapReviewer(reviewer);
       });
       const ccsEl = this.$$('#ccs');
       if (ccsEl) {
         for (let reviewer of ccsEl.additions()) {
           if (reviewer.account) {
             accountAdditions[reviewer.account._account_id] = true;
           }
           reviewer = this._mapReviewer(reviewer);
           reviewer.state = 'CC';
           obj.reviewers.push(reviewer);
         }
       }

       this.disabled = true;

       const errFn = this._handle400Error.bind(this);
       return this._saveReview(obj, errFn).then(response => {
         if (!response) {
           // Null or undefined response indicates that an error handler
           // took responsibility, so just return.
           return {};
         }
         if (!response.ok) {
           this.fire('server-error', {response});
           return {};
         }

         this.draft = '';
         this._includeComments = true;
         this.fire('send', null, {bubbles: false});
         return accountAdditions;
       }).then(result => {
         this.disabled = false;
         return result;
       }).catch(err => {
         this.disabled = false;
         throw err;
       });
     },

     _focusOn(section) {
       // Safeguard- always want to focus on something.
       if (!section || section === FocusTarget.ANY) {
         section = this._chooseFocusTarget();
       }
       if (section === FocusTarget.BODY) {
         const textarea = this.$.textarea;
         textarea.async(textarea.getNativeTextarea()
             .focus.bind(textarea.getNativeTextarea()));
       } else if (section === FocusTarget.REVIEWERS) {
         const reviewerEntry = this.$.reviewers.focusStart;
         reviewerEntry.async(reviewerEntry.focus);
       } else if (section === FocusTarget.CCS) {
         const ccEntry = this.$$('#ccs').focusStart;
         ccEntry.async(ccEntry.focus);
       }
     },

     _chooseFocusTarget() {
       // If we are the owner and the reviewers field is empty, focus on that.
       if (this._account && this.change && this.change.owner &&
           this._account._account_id === this.change.owner._account_id &&
           (!this._reviewers || this._reviewers.length === 0)) {
         return FocusTarget.REVIEWERS;
       }

       // Default to BODY.
       return FocusTarget.BODY;
     },

     _handle400Error(response) {
       // A call to _saveReview could fail with a server error if erroneous
       // reviewers were requested. This is signalled with a 400 Bad Request
       // status. The default gr-rest-api-interface error handling would
       // result in a large JSON response body being displayed to the user in
       // the gr-error-manager toast.
       //
       // We can modify the error handling behavior by passing this function
       // through to restAPI as a custom error handling function. Since we're
       // short-circuiting restAPI we can do our own response parsing and fire
       // the server-error ourselves.
       //
       this.disabled = false;

       // Using response.clone() here, because getResponseObject() and
       // potentially the generic error handler will want to call text() on the
       // response object, which can only be done once per object.
       const jsonPromise = this.$.restAPI.getResponseObject(response.clone());
       return jsonPromise.then(result => {
         // Only perform custom error handling for 400s and a parseable
         // ReviewResult response.
         if (response.status === 400 && result) {
           const errors = [];
           for (const state of ['reviewers', 'ccs']) {
             if (!result.hasOwnProperty(state)) { continue; }
             for (const reviewer of Object.values(result[state])) {
               if (reviewer.error) {
                 errors.push(reviewer.error);
               }
             }
           }
           response = {
             ok: false,
             status: response.status,
             text() { return Promise.resolve(errors.join(', ')); },
           };
         }
         this.fire('server-error', {response});
         return null; // Means that the error has been handled.
       });
     },

     _computeHideDraftList(drafts) {
       return Object.keys(drafts || {}).length == 0;
     },

     _computeDraftsTitle(drafts) {
       let total = 0;
       for (const file in drafts) {
         if (drafts.hasOwnProperty(file)) {
           total += drafts[file].length;
         }
       }
       if (total == 0) { return ''; }
       if (total == 1) { return '1 Draft'; }
       if (total > 1) { return total + ' Drafts'; }
     },

     _computeMessagePlaceholder(canBeStarted) {
       return canBeStarted ?
         'Add a note for your reviewers...' :
         'Say something nice...';
     },

     _changeUpdated(changeRecord, owner) {
       // Polymer 2: check for undefined
       if ([changeRecord, owner].some(arg => arg === undefined)) {
         return;
       }

       this._rebuildReviewerArrays(changeRecord.base, owner);
     },

     _rebuildReviewerArrays(change, owner) {
       this._owner = owner;

       const reviewers = [];
       const ccs = [];

       for (const key in change) {
         if (change.hasOwnProperty(key)) {
           if (key !== 'REVIEWER' && key !== 'CC') {
             console.warn('unexpected reviewer state:', key);
             continue;
           }
           for (const entry of change[key]) {
             if (entry._account_id === owner._account_id) {
               continue;
             }
             switch (key) {
               case 'REVIEWER':
                 reviewers.push(entry);
                 break;
               case 'CC':
                 ccs.push(entry);
                 break;
             }
           }
         }
       }

       this._ccs = ccs;
       this._reviewers = reviewers;
     },

     _accountOrGroupKey(entry) {
       return entry.id || entry._account_id;
     },

     /**
      * Generates a function to filter out reviewer/CC entries. When isCCs is
      * truthy, the function filters out entries that already exist in this._ccs.
      * When falsy, the function filters entries that exist in this._reviewers.
      * @param {boolean} isCCs
      * @return {!Function}
      */
     _filterReviewerSuggestionGenerator(isCCs) {
       return suggestion => {
         let entry;
         if (suggestion.account) {
           entry = suggestion.account;
         } else if (suggestion.group) {
           entry = suggestion.group;
         } else {
           console.warn(
               'received suggestion that was neither account nor group:',
               suggestion);
         }
         if (entry._account_id === this._owner._account_id) {
           return false;
         }

         const key = this._accountOrGroupKey(entry);
         const finder = entry => this._accountOrGroupKey(entry) === key;
         if (isCCs) {
           return this._ccs.find(finder) === undefined;
         }
         return this._reviewers.find(finder) === undefined;
       };
     },

     _getAccount() {
       return this.$.restAPI.getAccount();
     },

     _cancelTapHandler(e) {
       e.preventDefault();
       this.cancel();
     },

     cancel() {
       this.fire('cancel', null, {bubbles: false});
       this.$.textarea.closeDropdown();
       this._purgeReviewersPendingRemove(true);
       this._rebuildReviewerArrays(this.change.reviewers, this._owner);
     },

     _saveTapHandler(e) {
       e.preventDefault();
       if (!this.$$('#ccs').submitEntryText()) {
         // Do not proceed with the save if there is an invalid email entry in
         // the text field of the CC entry.
         return;
       }
       this.send(this._includeComments, false).then(keepReviewers => {
         this._purgeReviewersPendingRemove(false, keepReviewers);
       });
     },

     _sendTapHandler(e) {
       e.preventDefault();
       this._submit();
     },

     _submit() {
       if (!this.$$('#ccs').submitEntryText()) {
         // Do not proceed with the send if there is an invalid email entry in
         // the text field of the CC entry.
         return;
       }
       if (this._sendDisabled) {
         this.dispatchEvent(new CustomEvent('show-alert', {
           bubbles: true,
           composed: true,
           detail: {message: EMPTY_REPLY_MESSAGE},
         }));
         return;
       }
       return this.send(this._includeComments, this.canBeStarted)
           .then(keepReviewers => {
             this._purgeReviewersPendingRemove(false, keepReviewers);
           })
           .catch(err => {
             this.dispatchEvent(new CustomEvent('show-error', {
               bubbles: true,
               composed: true,
               detail: {message: `Error submitting review ${err}`},
             }));
           });
     },

     _saveReview(review, opt_errFn) {
       return this.$.restAPI.saveChangeReview(this.change._number, this.patchNum,
           review, opt_errFn);
     },

     _reviewerPendingConfirmationUpdated(reviewer) {
       if (reviewer === null) {
         this.$.reviewerConfirmationOverlay.close();
       } else {
         this._pendingConfirmationDetails =
             this._ccPendingConfirmation || this._reviewerPendingConfirmation;
         this.$.reviewerConfirmationOverlay.open();
       }
     },

     _confirmPendingReviewer() {
       if (this._ccPendingConfirmation) {
         this.$$('#ccs').confirmGroup(this._ccPendingConfirmation.group);
         this._focusOn(FocusTarget.CCS);
       } else {
         this.$.reviewers.confirmGroup(this._reviewerPendingConfirmation.group);
         this._focusOn(FocusTarget.REVIEWERS);
       }
     },

     _cancelPendingReviewer() {
       this._ccPendingConfirmation = null;
       this._reviewerPendingConfirmation = null;

       const target =
           this._ccPendingConfirmation ? FocusTarget.CCS : FocusTarget.REVIEWERS;
       this._focusOn(target);
     },

     _getStorageLocation() {
       // Tests trigger this method without setting change.
       if (!this.change) { return {}; }
       return {
         changeNum: this.change._number,
         patchNum: '@change',
         path: '@change',
       };
     },

     _loadStoredDraft() {
       const draft = this.$.storage.getDraftComment(this._getStorageLocation());
       return draft ? draft.message : '';
     },

     _handleAccountTextEntry() {
       // When either of the account entries has input added to the autocomplete,
       // it should trigger the save button to enable/
       //
       // Note: if the text is removed, the save button will not get disabled.
       this._reviewersMutated = true;
     },

     _draftChanged(newDraft, oldDraft) {
       this.debounce('store', () => {
         if (!newDraft.length && oldDraft) {
           // If the draft has been modified to be empty, then erase the storage
           // entry.
           this.$.storage.eraseDraftComment(this._getStorageLocation());
         } else if (newDraft.length) {
           this.$.storage.setDraftComment(this._getStorageLocation(),
               this.draft);
         }
       }, STORAGE_DEBOUNCE_INTERVAL_MS);
     },

     _handleHeightChanged(e) {
       this.fire('autogrow');
     },

     _handleLabelsChanged() {
       this._labelsChanged = Object.keys(
           this.$.labelScores.getLabelValues()).length !== 0;
     },

     _isState(knownLatestState, value) {
       return knownLatestState === value;
     },

     _reload() {
       // Load the current change without any patch range.
       location.href = this.getBaseUrl() + '/c/' + this.change._number;
     },

     _computeSendButtonLabel(canBeStarted) {
       return canBeStarted ? ButtonLabels.START_REVIEW : ButtonLabels.SEND;
     },

     _computeSendButtonTooltip(canBeStarted) {
       return canBeStarted ? ButtonTooltips.START_REVIEW : ButtonTooltips.SEND;
     },

     _computeSavingLabelClass(savingComments) {
       return savingComments ? 'saving' : '';
     },

     _computeSendButtonDisabled(buttonLabel, drafts, text, reviewersMutated,
         labelsChanged, includeComments, disabled) {
       // Polymer 2: check for undefined
       if ([
         buttonLabel,
         drafts,
         text,
         reviewersMutated,
         labelsChanged,
         includeComments,
         disabled,
       ].some(arg => arg === undefined)) {
         return undefined;
       }

       if (disabled) { return true; }
       if (buttonLabel === ButtonLabels.START_REVIEW) { return false; }
       const hasDrafts = includeComments && Object.keys(drafts).length;
       return !hasDrafts && !text.length && !reviewersMutated && !labelsChanged;
     },

     _computePatchSetWarning(patchNum, labelsChanged) {
       let str = `Patch ${patchNum} is not latest.`;
       if (labelsChanged) {
         str += ' Voting on a non-latest patch will have no effect.';
       }
       return str;
     },

     setPluginMessage(message) {
       this._pluginMessage = message;
     },

     _sendDisabledChanged(sendDisabled) {
       this.dispatchEvent(new CustomEvent('send-disabled-changed'));
     },

     _getReviewerSuggestionsProvider(change) {
       const provider = GrReviewerSuggestionsProvider.create(this.$.restAPI,
           change._number, Gerrit.SUGGESTIONS_PROVIDERS_USERS_TYPES.REVIEWER);
       provider.init();
       return provider;
     },

     _getCcSuggestionsProvider(change) {
       const provider = GrReviewerSuggestionsProvider.create(this.$.restAPI,
           change._number, Gerrit.SUGGESTIONS_PROVIDERS_USERS_TYPES.CC);
       provider.init();
       return provider;
     },
   });
 })();
	/**
	* @license
	* Copyright (C) 2016 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/
	(function() {
	'use strict';

	const STORAGE_DEBOUNCE_INTERVAL_MS = 400;

	const FocusTarget = {
	ANY: 'any',
	BODY: 'body',
	CCS: 'cc',
	REVIEWERS: 'reviewers',
	};

	const ReviewerTypes = {
	REVIEWER: 'REVIEWER',
	CC: 'CC',
	};

	const LatestPatchState = {
	LATEST: 'latest',
	CHECKING: 'checking',
	NOT_LATEST: 'not-latest',
	};

	const ButtonLabels = {
	START_REVIEW: 'Start review',
	SEND: 'Send',
	};

	const ButtonTooltips = {
	SAVE: 'Save reply but do not send notification',
	START_REVIEW: 'Mark as ready for review and send reply',
	SEND: 'Send reply',
	};

	const EMPTY_REPLY_MESSAGE = 'Cannot send an empty reply.';

	const SEND_REPLY_TIMING_LABEL = 'SendReply';

	Polymer({
	is: 'gr-reply-dialog',
	_legacyUndefinedCheck: true,

	/**
	* Fired when a reply is successfully sent.
	*
	* @event send
	*/

	/**
	* Fired when the user presses the cancel button.
	*
	* @event cancel
	*/

	/**
	* Fired when the main textarea's value changes, which may have triggered
	* a change in size for the dialog.
	*
	* @event autogrow
	*/

	/**
	* Fires to show an alert when a send is attempted on the non-latest patch.
	*
	* @event show-alert
	*/

	/**
	* Fires when the reply dialog believes that the server side diff drafts
	* have been updated and need to be refreshed.
	*
	* @event comment-refresh
	*/

	/**
	* Fires when the state of the send button (enabled/disabled) changes.
	*
	* @event send-disabled-changed
	*/

	properties: {
	/**
	* @type {{ _number: number, removable_reviewers: Array }}
	*/
	change: Object,
	patchNum: String,
	canBeStarted: {
	type: Boolean,
	value: false,
	},
	disabled: {
	type: Boolean,
	value: false,
	reflectToAttribute: true,
	},
	draft: {
	type: String,
	value: '',
	observer: '_draftChanged',
	},
	quote: {
	type: String,
	value: '',
	},
	diffDrafts: {
	type: Object,
	observer: '_handleHeightChanged',
	},
	/** @type {!Function} */
	filterReviewerSuggestion: {
	type: Function,
	value() {
	return this._filterReviewerSuggestionGenerator(false);
	},
	},
	/** @type {!Function} */
	filterCCSuggestion: {
	type: Function,
	value() {
	return this._filterReviewerSuggestionGenerator(true);
	},
	},
	permittedLabels: Object,
	/**
	* @type {{ commentlinks: Array }}
	*/
	projectConfig: Object,
	knownLatestState: String,
	underReview: {
	type: Boolean,
	value: true,
	},

	_account: Object,
	_ccs: Array,
	/** @type {?Object} */
	_ccPendingConfirmation: {
	type: Object,
	observer: '_reviewerPendingConfirmationUpdated',
	},
	_messagePlaceholder: {
	type: String,
	computed: '_computeMessagePlaceholder(canBeStarted)',
	},
	_owner: Object,
	/** @type {?} */
	_pendingConfirmationDetails: Object,
	_includeComments: {
	type: Boolean,
	value: true,
	},
	_reviewers: Array,
	/** @type {?Object} */
	_reviewerPendingConfirmation: {
	type: Object,
	observer: '_reviewerPendingConfirmationUpdated',
	},
	_previewFormatting: {
	type: Boolean,
	value: false,
	observer: '_handleHeightChanged',
	},
	_reviewersPendingRemove: {
	type: Object,
	value: {
	CC: [],
	REVIEWER: [],
	},
	},
	_sendButtonLabel: {
	type: String,
	computed: '_computeSendButtonLabel(canBeStarted)',
	},
	_savingComments: Boolean,
	_reviewersMutated: {
	type: Boolean,
	value: false,
	},
	_labelsChanged: {
	type: Boolean,
	value: false,
	},
	_saveTooltip: {
	type: String,
	value: ButtonTooltips.SAVE,
	readOnly: true,
	},
	_pluginMessage: {
	type: String,
	value: '',
	},
	_sendDisabled: {
	type: Boolean,
	computed: '_computeSendButtonDisabled(_sendButtonLabel, diffDrafts, ' +
	'draft, _reviewersMutated, _labelsChanged, _includeComments, ' +
	'disabled)',
	observer: '_sendDisabledChanged',
	},
	},

	FocusTarget,

	behaviors: [
	Gerrit.BaseUrlBehavior,
	Gerrit.FireBehavior,
	Gerrit.KeyboardShortcutBehavior,
	Gerrit.PatchSetBehavior,
	Gerrit.RESTClientBehavior,
	],

	keyBindings: {
	'esc': '_handleEscKey',
	'ctrl+enter meta+enter': '_handleEnterKey',
	},

	observers: [
	'_changeUpdated(change.reviewers.*, change.owner)',
	'_ccsChanged(_ccs.splices)',
	'_reviewersChanged(_reviewers.splices)',
	],

	attached() {
	this._getAccount().then(account => {
	this._account = account \|\| {};
	});
	},

	ready() {
	this.$.jsAPI.addElement(this.$.jsAPI.Element.REPLY_DIALOG, this);
	},

	open(opt_focusTarget) {
	this.knownLatestState = LatestPatchState.CHECKING;
	this.fetchChangeUpdates(this.change, this.$.restAPI)
	.then(result => {
	this.knownLatestState = result.isLatest ?
	LatestPatchState.LATEST : LatestPatchState.NOT_LATEST;
	});

	this._focusOn(opt_focusTarget);
	if (this.quote && this.quote.length) {
	// If a reply quote has been provided, use it and clear the property.
	this.draft = this.quote;
	this.quote = '';
	} else {
	// Otherwise, check for an unsaved draft in localstorage.
	this.draft = this._loadStoredDraft();
	}
	if (this.$.restAPI.hasPendingDiffDrafts()) {
	this._savingComments = true;
	this.$.restAPI.awaitPendingDiffDrafts().then(() => {
	this.fire('comment-refresh');
	this._savingComments = false;
	});
	}
	},

	focus() {
	this._focusOn(FocusTarget.ANY);
	},

	getFocusStops() {
	const end = this._sendDisabled ? this.$.cancelButton : this.$.sendButton;
	return {
	start: this.$.reviewers.focusStart,
	end,
	};
	},

	setLabelValue(label, value) {
	const selectorEl =
	this.$.labelScores.$$(`gr-label-score-row[name="${label}"]`);
	if (!selectorEl) { return; }
	selectorEl.setSelectedValue(value);
	},

	getLabelValue(label) {
	const selectorEl =
	this.$.labelScores.$$(`gr-label-score-row[name="${label}"]`);
	if (!selectorEl) { return null; }

	return selectorEl.selectedValue;
	},

	_handleEscKey(e) {
	this.cancel();
	},

	_handleEnterKey(e) {
	this._submit();
	},

	_ccsChanged(splices) {
	this._reviewerTypeChanged(splices, ReviewerTypes.CC);
	},

	_reviewersChanged(splices) {
	this._reviewerTypeChanged(splices, ReviewerTypes.REVIEWER);
	},

	_reviewerTypeChanged(splices, reviewerType) {
	if (splices && splices.indexSplices) {
	this._reviewersMutated = true;
	this._processReviewerChange(splices.indexSplices,
	reviewerType);
	let key;
	let index;
	let account;
	// Remove any accounts that already exist as a CC for reviewer
	// or vice versa.
	const isReviewer = ReviewerTypes.REVIEWER === reviewerType;
	for (const splice of splices.indexSplices) {
	for (let i = 0; i < splice.addedCount; i++) {
	account = splice.object[splice.index + i];
	key = this._accountOrGroupKey(account);
	const array = isReviewer ? this._ccs : this._reviewers;
	index = array.findIndex(
	account => this._accountOrGroupKey(account) === key);
	if (index >= 0) {
	this.splice(isReviewer ? '_ccs' : '_reviewers', index, 1);
	const moveFrom = isReviewer ? 'CC' : 'reviewer';
	const moveTo = isReviewer ? 'reviewer' : 'CC';
	const message = (account.name \|\| account.email \|\| key) +
	` moved from ${moveFrom} to ${moveTo}.`;
	this.fire('show-alert', {message});
	}
	}
	}
	}
	},

	_processReviewerChange(indexSplices, type) {
	for (const splice of indexSplices) {
	for (const account of splice.removed) {
	if (!this._reviewersPendingRemove[type]) {
	console.err('Invalid type ' + type + ' for reviewer.');
	return;
	}
	this._reviewersPendingRemove[type].push(account);
	}
	}
	},

	/**
	* Resets the state of the _reviewersPendingRemove object, and removes
	* accounts if necessary.
	*
	* @param {boolean} isCancel true if the action is a cancel.
	* @param {Object=} opt_accountIdsTransferred map of account IDs that must
	* not be removed, because they have been readded in another state.
	*/
	_purgeReviewersPendingRemove(isCancel, opt_accountIdsTransferred) {
	let reviewerArr;
	const keep = opt_accountIdsTransferred \|\| {};
	for (const type in this._reviewersPendingRemove) {
	if (this._reviewersPendingRemove.hasOwnProperty(type)) {
	if (!isCancel) {
	reviewerArr = this._reviewersPendingRemove[type];
	for (let i = 0; i < reviewerArr.length; i++) {
	if (!keep[reviewerArr[i]._account_id]) {
	this._removeAccount(reviewerArr[i], type);
	}
	}
	}
	this._reviewersPendingRemove[type] = [];
	}
	}
	},

	/**
	* Removes an account from the change, both on the backend and the client.
	* Does nothing if the account is a pending addition.
	*
	* @param {!Object} account
	* @param {string} type
	*
	* * TODO(beckysiegel) submit Polymer PR
	* @suppress {checkTypes}
	*/
	_removeAccount(account, type) {
	if (account._pendingAdd) { return; }

	return this.$.restAPI.removeChangeReviewer(this.change._number,
	account._account_id).then(response => {
	if (!response.ok) { return response; }

	const reviewers = this.change.reviewers[type] \|\| [];
	for (let i = 0; i < reviewers.length; i++) {
	if (reviewers[i]._account_id == account._account_id) {
	this.splice(['change', 'reviewers', type], i, 1);
	break;
	}
	}
	});
	},

	_mapReviewer(reviewer) {
	let reviewerId;
	let confirmed;
	if (reviewer.account) {
	reviewerId = reviewer.account._account_id \|\| reviewer.account.email;
	} else if (reviewer.group) {
	reviewerId = reviewer.group.id;
	confirmed = reviewer.group.confirmed;
	}
	return {reviewer: reviewerId, confirmed};
	},

	send(includeComments, startReview) {
	this.$.reporting.time(SEND_REPLY_TIMING_LABEL);
	const labels = this.$.labelScores.getLabelValues();

	const obj = {
	drafts: includeComments ? 'PUBLISH_ALL_REVISIONS' : 'KEEP',
	labels,
	};

	if (startReview) {
	obj.ready = true;
	}

	if (this.draft != null) {
	obj.message = this.draft;
	}

	const accountAdditions = {};
	obj.reviewers = this.$.reviewers.additions().map(reviewer => {
	if (reviewer.account) {
	accountAdditions[reviewer.account._account_id] = true;
	}
	return this._mapReviewer(reviewer);
	});
	const ccsEl = this.$$('#ccs');
	if (ccsEl) {
	for (let reviewer of ccsEl.additions()) {
	if (reviewer.account) {
	accountAdditions[reviewer.account._account_id] = true;
	}
	reviewer = this._mapReviewer(reviewer);
	reviewer.state = 'CC';
	obj.reviewers.push(reviewer);
	}
	}

	this.disabled = true;

	const errFn = this._handle400Error.bind(this);
	return this._saveReview(obj, errFn).then(response => {
	if (!response) {
	// Null or undefined response indicates that an error handler
	// took responsibility, so just return.
	return {};
	}
	if (!response.ok) {
	this.fire('server-error', {response});
	return {};
	}

	this.draft = '';
	this._includeComments = true;
	this.fire('send', null, {bubbles: false});
	return accountAdditions;
	}).then(result => {
	this.disabled = false;
	return result;
	}).catch(err => {
	this.disabled = false;
	throw err;
	});
	},

	_focusOn(section) {
	// Safeguard- always want to focus on something.
	if (!section \|\| section === FocusTarget.ANY) {
	section = this._chooseFocusTarget();
	}
	if (section === FocusTarget.BODY) {
	const textarea = this.$.textarea;
	textarea.async(textarea.getNativeTextarea()
	.focus.bind(textarea.getNativeTextarea()));
	} else if (section === FocusTarget.REVIEWERS) {
	const reviewerEntry = this.$.reviewers.focusStart;
	reviewerEntry.async(reviewerEntry.focus);
	} else if (section === FocusTarget.CCS) {
	const ccEntry = this.$$('#ccs').focusStart;
	ccEntry.async(ccEntry.focus);
	}
	},

	_chooseFocusTarget() {
	// If we are the owner and the reviewers field is empty, focus on that.
	if (this._account && this.change && this.change.owner &&
	this._account._account_id === this.change.owner._account_id &&
	(!this._reviewers \|\| this._reviewers.length === 0)) {
	return FocusTarget.REVIEWERS;
	}

	// Default to BODY.
	return FocusTarget.BODY;
	},

	_handle400Error(response) {
	// A call to _saveReview could fail with a server error if erroneous
	// reviewers were requested. This is signalled with a 400 Bad Request
	// status. The default gr-rest-api-interface error handling would
	// result in a large JSON response body being displayed to the user in
	// the gr-error-manager toast.
	//
	// We can modify the error handling behavior by passing this function
	// through to restAPI as a custom error handling function. Since we're
	// short-circuiting restAPI we can do our own response parsing and fire
	// the server-error ourselves.
	//
	this.disabled = false;

	// Using response.clone() here, because getResponseObject() and
	// potentially the generic error handler will want to call text() on the
	// response object, which can only be done once per object.
	const jsonPromise = this.$.restAPI.getResponseObject(response.clone());
	return jsonPromise.then(result => {
	// Only perform custom error handling for 400s and a parseable
	// ReviewResult response.
	if (response.status === 400 && result) {
	const errors = [];
	for (const state of ['reviewers', 'ccs']) {
	if (!result.hasOwnProperty(state)) { continue; }
	for (const reviewer of Object.values(result[state])) {
	if (reviewer.error) {
	errors.push(reviewer.error);
	}
	}
	}
	response = {
	ok: false,
	status: response.status,
	text() { return Promise.resolve(errors.join(', ')); },
	};
	}
	this.fire('server-error', {response});
	return null; // Means that the error has been handled.
	});
	},

	_computeHideDraftList(drafts) {
	return Object.keys(drafts \|\| {}).length == 0;
	},

	_computeDraftsTitle(drafts) {
	let total = 0;
	for (const file in drafts) {
	if (drafts.hasOwnProperty(file)) {
	total += drafts[file].length;
	}
	}
	if (total == 0) { return ''; }
	if (total == 1) { return '1 Draft'; }
	if (total > 1) { return total + ' Drafts'; }
	},

	_computeMessagePlaceholder(canBeStarted) {
	return canBeStarted ?
	'Add a note for your reviewers...' :
	'Say something nice...';
	},

	_changeUpdated(changeRecord, owner) {
	// Polymer 2: check for undefined
	if ([changeRecord, owner].some(arg => arg === undefined)) {
	return;
	}

	this._rebuildReviewerArrays(changeRecord.base, owner);
	},

	_rebuildReviewerArrays(change, owner) {
	this._owner = owner;

	const reviewers = [];
	const ccs = [];

	for (const key in change) {
	if (change.hasOwnProperty(key)) {
	if (key !== 'REVIEWER' && key !== 'CC') {
	console.warn('unexpected reviewer state:', key);
	continue;
	}
	for (const entry of change[key]) {
	if (entry._account_id === owner._account_id) {
	continue;
	}
	switch (key) {
	case 'REVIEWER':
	reviewers.push(entry);
	break;
	case 'CC':
	ccs.push(entry);
	break;
	}
	}
	}
	}

	this._ccs = ccs;
	this._reviewers = reviewers;
	},

	_accountOrGroupKey(entry) {
	return entry.id \|\| entry._account_id;
	},

	/**
	* Generates a function to filter out reviewer/CC entries. When isCCs is
	* truthy, the function filters out entries that already exist in this._ccs.
	* When falsy, the function filters entries that exist in this._reviewers.
	* @param {boolean} isCCs
	* @return {!Function}
	*/
	_filterReviewerSuggestionGenerator(isCCs) {
	return suggestion => {
	let entry;
	if (suggestion.account) {
	entry = suggestion.account;
	} else if (suggestion.group) {
	entry = suggestion.group;
	} else {
	console.warn(
	'received suggestion that was neither account nor group:',
	suggestion);
	}
	if (entry._account_id === this._owner._account_id) {
	return false;
	}

	const key = this._accountOrGroupKey(entry);
	const finder = entry => this._accountOrGroupKey(entry) === key;
	if (isCCs) {
	return this._ccs.find(finder) === undefined;
	}
	return this._reviewers.find(finder) === undefined;
	};
	},

	_getAccount() {
	return this.$.restAPI.getAccount();
	},

	_cancelTapHandler(e) {
	e.preventDefault();
	this.cancel();
	},

	cancel() {
	this.fire('cancel', null, {bubbles: false});
	this.$.textarea.closeDropdown();
	this._purgeReviewersPendingRemove(true);
	this._rebuildReviewerArrays(this.change.reviewers, this._owner);
	},

	_saveTapHandler(e) {
	e.preventDefault();
	if (!this.$$('#ccs').submitEntryText()) {
	// Do not proceed with the save if there is an invalid email entry in
	// the text field of the CC entry.
	return;
	}
	this.send(this._includeComments, false).then(keepReviewers => {
	this._purgeReviewersPendingRemove(false, keepReviewers);
	});
	},

	_sendTapHandler(e) {
	e.preventDefault();
	this._submit();
	},

	_submit() {
	if (!this.$$('#ccs').submitEntryText()) {
	// Do not proceed with the send if there is an invalid email entry in
	// the text field of the CC entry.
	return;
	}
	if (this._sendDisabled) {
	this.dispatchEvent(new CustomEvent('show-alert', {
	bubbles: true,
	composed: true,
	detail: {message: EMPTY_REPLY_MESSAGE},
	}));
	return;
	}
	return this.send(this._includeComments, this.canBeStarted)
	.then(keepReviewers => {
	this._purgeReviewersPendingRemove(false, keepReviewers);
	})
	.catch(err => {
	this.dispatchEvent(new CustomEvent('show-error', {
	bubbles: true,
	composed: true,
	detail: {message: `Error submitting review ${err}`},
	}));
	});
	},

	_saveReview(review, opt_errFn) {
	return this.$.restAPI.saveChangeReview(this.change._number, this.patchNum,
	review, opt_errFn);
	},

	_reviewerPendingConfirmationUpdated(reviewer) {
	if (reviewer === null) {
	this.$.reviewerConfirmationOverlay.close();
	} else {
	this._pendingConfirmationDetails =
	this._ccPendingConfirmation \|\| this._reviewerPendingConfirmation;
	this.$.reviewerConfirmationOverlay.open();
	}
	},

	_confirmPendingReviewer() {
	if (this._ccPendingConfirmation) {
	this.$$('#ccs').confirmGroup(this._ccPendingConfirmation.group);
	this._focusOn(FocusTarget.CCS);
	} else {
	this.$.reviewers.confirmGroup(this._reviewerPendingConfirmation.group);
	this._focusOn(FocusTarget.REVIEWERS);
	}
	},

	_cancelPendingReviewer() {
	this._ccPendingConfirmation = null;
	this._reviewerPendingConfirmation = null;

	const target =
	this._ccPendingConfirmation ? FocusTarget.CCS : FocusTarget.REVIEWERS;
	this._focusOn(target);
	},

	_getStorageLocation() {
	// Tests trigger this method without setting change.
	if (!this.change) { return {}; }
	return {
	changeNum: this.change._number,
	patchNum: '@change',
	path: '@change',
	};
	},

	_loadStoredDraft() {
	const draft = this.$.storage.getDraftComment(this._getStorageLocation());
	return draft ? draft.message : '';
	},

	_handleAccountTextEntry() {
	// When either of the account entries has input added to the autocomplete,
	// it should trigger the save button to enable/
	//
	// Note: if the text is removed, the save button will not get disabled.
	this._reviewersMutated = true;
	},

	_draftChanged(newDraft, oldDraft) {
	this.debounce('store', () => {
	if (!newDraft.length && oldDraft) {
	// If the draft has been modified to be empty, then erase the storage
	// entry.
	this.$.storage.eraseDraftComment(this._getStorageLocation());
	} else if (newDraft.length) {
	this.$.storage.setDraftComment(this._getStorageLocation(),
	this.draft);
	}
	}, STORAGE_DEBOUNCE_INTERVAL_MS);
	},

	_handleHeightChanged(e) {
	this.fire('autogrow');
	},

	_handleLabelsChanged() {
	this._labelsChanged = Object.keys(
	this.$.labelScores.getLabelValues()).length !== 0;
	},

	_isState(knownLatestState, value) {
	return knownLatestState === value;
	},

	_reload() {
	// Load the current change without any patch range.
	location.href = this.getBaseUrl() + '/c/' + this.change._number;
	},

	_computeSendButtonLabel(canBeStarted) {
	return canBeStarted ? ButtonLabels.START_REVIEW : ButtonLabels.SEND;
	},

	_computeSendButtonTooltip(canBeStarted) {
	return canBeStarted ? ButtonTooltips.START_REVIEW : ButtonTooltips.SEND;
	},

	_computeSavingLabelClass(savingComments) {
	return savingComments ? 'saving' : '';
	},

	_computeSendButtonDisabled(buttonLabel, drafts, text, reviewersMutated,
	labelsChanged, includeComments, disabled) {
	// Polymer 2: check for undefined
	if ([
	buttonLabel,
	drafts,
	text,
	reviewersMutated,
	labelsChanged,
	includeComments,
	disabled,
	].some(arg => arg === undefined)) {
	return undefined;
	}

	if (disabled) { return true; }
	if (buttonLabel === ButtonLabels.START_REVIEW) { return false; }
	const hasDrafts = includeComments && Object.keys(drafts).length;
	return !hasDrafts && !text.length && !reviewersMutated && !labelsChanged;
	},

	_computePatchSetWarning(patchNum, labelsChanged) {
	let str = `Patch ${patchNum} is not latest.`;
	if (labelsChanged) {
	str += ' Voting on a non-latest patch will have no effect.';
	}
	return str;
	},

	setPluginMessage(message) {
	this._pluginMessage = message;
	},

	_sendDisabledChanged(sendDisabled) {
	this.dispatchEvent(new CustomEvent('send-disabled-changed'));
	},

	_getReviewerSuggestionsProvider(change) {
	const provider = GrReviewerSuggestionsProvider.create(this.$.restAPI,
	change._number, Gerrit.SUGGESTIONS_PROVIDERS_USERS_TYPES.REVIEWER);
	provider.init();
	return provider;
	},

	_getCcSuggestionsProvider(change) {
	const provider = GrReviewerSuggestionsProvider.create(this.$.restAPI,
	change._number, Gerrit.SUGGESTIONS_PROVIDERS_USERS_TYPES.CC);
	provider.init();
	return provider;
	},
	});
	})();