polygerrit-ui/app/elements/change/gr-confirm-cherrypick-dialog/gr-confirm-cherrypick-dialog.ts - gerrit - Git at Google

 /**
  * @license
  * Copyright 2016 Google LLC
  * SPDX-License-Identifier: Apache-2.0
  */
 import '@polymer/iron-autogrow-textarea/iron-autogrow-textarea';
 import '@polymer/iron-input/iron-input';
 import '../../../styles/shared-styles';
 import '../../shared/gr-autocomplete/gr-autocomplete';
 import '../../shared/gr-dialog/gr-dialog';
 import {navigationToken} from '../../core/gr-navigation/gr-navigation';
 import {getAppContext} from '../../../services/app-context';
 import {
   ChangeInfo,
   BranchName,
   RepoName,
   CommitId,
   ChangeInfoId,
   TopicName,
   ChangeActionDialog,
 } from '../../../types/common';
 import {customElement, property, query, state} from 'lit/decorators.js';
 import {
   AutocompleteQuery,
   AutocompleteSuggestion,
   GrTypedAutocomplete,
 } from '../../shared/gr-autocomplete/gr-autocomplete';
 import {
   HttpMethod,
   ChangeStatus,
   ProgressStatus,
 } from '../../../constants/constants';
 import {fire, fireNoBubble} from '../../../utils/event-util';
 import {css, html, LitElement, PropertyValues} from 'lit';
 import {sharedStyles} from '../../../styles/shared-styles';
 import {choose} from 'lit/directives/choose.js';
 import {when} from 'lit/directives/when.js';
 import {BindValueChangeEvent} from '../../../types/events';
 import {resolve} from '../../../models/dependency';
 import {createSearchUrl} from '../../../models/views/search';
 import {throwingErrorCallback} from '../../shared/gr-rest-api-interface/gr-rest-apis/gr-rest-api-helper';
 import {uuid} from '../../../utils/common-util';

 const SUGGESTIONS_LIMIT = 15;
 const CHANGE_SUBJECT_LIMIT = 50;
 enum CherryPickType {
   SINGLE_CHANGE = 1,
   TOPIC,
 }

 export type Statuses = {[changeId: string]: Status};

 interface Status {
   status: ProgressStatus;
   msg?: string;
 }

 declare global {
   interface HTMLElementTagNameMap {
     'gr-confirm-cherrypick-dialog': GrConfirmCherrypickDialog;
   }
 }

 @customElement('gr-confirm-cherrypick-dialog')
 export class GrConfirmCherrypickDialog
   extends LitElement
   implements ChangeActionDialog
 {
   /**
    * Fired when the confirm button is pressed.
    *
    * @event confirm
    */

   /**
    * Fired when the cancel button is pressed.
    *
    * @event cancel
    */

   @property({type: String})
   branch = '' as BranchName;

   @property({type: String})
   baseCommit?: string;

   @property({type: String})
   changeStatus?: ChangeStatus;

   @property({type: String})
   commitMessage?: string;

   @property({type: String})
   commitNum?: CommitId;

   @property({type: String})
   message = '';

   @property({type: String})
   project?: RepoName;

   @property({type: Array})
   changes: ChangeInfo[] = [];

   @state()
   private query: AutocompleteQuery;

   @state()
   private showCherryPickTopic = false;

   @state()
   private changesCount?: number;

   @state()
   cherryPickType = CherryPickType.SINGLE_CHANGE;

   @state()
   private duplicateProjectChanges = false;

   @state()
   // Status of each change that is being cherry picked together
   private statuses: Statuses;

   @state()
   private invalidBranch = false;

   @query('#branchInput')
   branchInput!: GrTypedAutocomplete<BranchName>;

   private selectedChangeIds = new Set<ChangeInfoId>();

   private readonly restApiService = getAppContext().restApiService;

   private readonly reporting = getAppContext().reportingService;

   private readonly getNavigation = resolve(this, navigationToken);

   constructor() {
     super();
     this.statuses = {};
     this.query = (text: string) => this.getProjectBranchesSuggestions(text);
   }

   override willUpdate(changedProperties: PropertyValues) {
     if (changedProperties.has('branch')) {
       this.updateBranch();
     }
     if (
       changedProperties.has('changeStatus') ||
       changedProperties.has('commitNum') ||
       changedProperties.has('commitMessage')
     ) {
       this.computeMessage();
     }
   }

   static override styles = [
     sharedStyles,
     css`
       :host {
         display: block;
       }
       :host([disabled]) {
         opacity: 0.5;
         pointer-events: none;
       }
       label {
         cursor: pointer;
       }
       .main {
         display: flex;
         flex-direction: column;
         width: 100%;
       }
       .main label,
       .main input[type='text'] {
         display: block;
         width: 100%;
       }
       iron-autogrow-textarea {
         font-family: var(--monospace-font-family);
         font-size: var(--font-size-mono);
         line-height: var(--line-height-mono);
         width: 73ch; /* Add a char to account for the border. */
       }
       .cherryPickTopicLayout {
         display: flex;
         align-items: center;
         margin-bottom: var(--spacing-m);
       }
       .cherryPickSingleChange,
       .cherryPickTopic {
         margin-left: var(--spacing-m);
       }
       .cherry-pick-topic-message {
         margin-bottom: var(--spacing-m);
       }
       label[for='messageInput'],
       label[for='baseInput'] {
         margin-top: var(--spacing-m);
       }
       .title {
         font-weight: var(--font-weight-bold);
       }
       tr > td {
         padding: var(--spacing-m);
       }
       th {
         color: var(--deemphasized-text-color);
       }
       table {
         border-collapse: collapse;
       }
       tr {
         border-bottom: 1px solid var(--border-color);
       }
       .error {
         color: var(--error-text-color);
       }
       .error-message {
         color: var(--error-text-color);
         margin: var(--spacing-m) 0 var(--spacing-m) 0;
       }
     `,
   ];

   override render() {
     return html`
       <gr-dialog
         confirm-label="Cherry Pick"
         .cancelLabel=${this.computeCancelLabel()}
         ?disabled=${this.computeDisableCherryPick(
           this.cherryPickType,
           this.duplicateProjectChanges,
           this.statuses,
           this.branch
         )}
         @confirm=${this.handleConfirmTap}
         @cancel=${this.handleCancelTap}
       >
         <div class="header title" slot="header">
           Cherry Pick Change to Another Branch
         </div>
         <div class="main" slot="main">
           <gr-endpoint-decorator name="cherrypick-main">
             <gr-endpoint-param name="changes" .value=${this.changes}>
             </gr-endpoint-param>
             <gr-endpoint-slot name="top"></gr-endpoint-slot>
             ${when(this.showCherryPickTopic, () =>
               this.renderCherrypickTopicLayout()
             )}
             <label for="branchInput"> Cherry Pick to branch </label>
             <gr-autocomplete
               id="branchInput"
               .text=${this.branch}
               .query=${this.query}
               placeholder="Destination branch"
               @text-changed=${(e: BindValueChangeEvent) =>
                 (this.branch = e.detail.value as BranchName)}
             >
             </gr-autocomplete>
             ${when(
               this.invalidBranch,
               () => html`
                 <span class="error"
                   >Branch name cannot contain space or commas.</span
                 >
               `
             )}
             ${choose(this.cherryPickType, [
               [
                 CherryPickType.SINGLE_CHANGE,
                 () => this.renderCherrypickSingleChangeInputs(),
               ],
               [CherryPickType.TOPIC, () => this.renderCherrypickTopicTable()],
             ])}
             <gr-endpoint-slot name="bottom"></gr-endpoint-slot>
           </gr-endpoint-decorator>
         </div>
       </gr-dialog>
     `;
   }

   private renderCherrypickTopicLayout() {
     return html`
       <div class="cherryPickTopicLayout">
         <input
           name="cherryPickOptions"
           type="radio"
           id="cherryPickSingleChange"
           @change=${this.handlecherryPickSingleChangeClicked}
           checked
         />
         <label for="cherryPickSingleChange" class="cherryPickSingleChange">
           Cherry Pick single change
         </label>
       </div>
       <div class="cherryPickTopicLayout">
         <input
           name="cherryPickOptions"
           type="radio"
           id="cherryPickTopic"
           @change=${this.handlecherryPickTopicClicked}
         />
         <label for="cherryPickTopic" class="cherryPickTopic">
           Cherry Pick entire topic (${this.changesCount} Changes)
         </label>
       </div>
     `;
   }

   private renderCherrypickSingleChangeInputs() {
     return html`
       <label for="baseInput"> Provide base commit sha1 for cherry-pick </label>
       <iron-input
         .bindValue=${this.baseCommit}
         @bind-value-changed=${(e: BindValueChangeEvent) =>
           (this.baseCommit = e.detail.value)}
       >
         <input
           is="iron-input"
           id="baseCommitInput"
           maxlength="40"
           placeholder="(optional)"
         />
       </iron-input>
       <label for="messageInput"> Cherry Pick Commit Message </label>
       <iron-autogrow-textarea
         id="messageInput"
         class="message"
         autocomplete="on"
         rows="4"
         .maxRows=${15}
         .bindValue=${this.message}
         @bind-value-changed=${(e: BindValueChangeEvent) =>
           (this.message = e.detail.value ?? '')}
       ></iron-autogrow-textarea>
     `;
   }

   private renderCherrypickTopicTable() {
     return html`
       <span class="error-message">${this.computeTopicErrorMessage()}</span>
       <span class="cherry-pick-topic-message">
         Commit Message will be auto generated
       </span>
       <table>
         <thead>
           <tr>
             <th></th>
             <th>Change</th>
             <th>Status</th>
             <th>Subject</th>
             <th>Project</th>
             <th>Progress</th>
             <!-- Error Message -->
             <th></th>
           </tr>
         </thead>
         <tbody>
           ${this.changes.map(
             item => html`
               <tr>
                 <td>
                   <input
                     type="checkbox"
                     data-item=${item.id as string}
                     @change=${this.toggleChangeSelected}
                     ?checked=${this.isChangeSelected(item.id)}
                   />
                 </td>
                 <td><span> ${this.getChangeId(item)} </span></td>
                 <td><span> ${item.status} </span></td>
                 <td>
                   <span> ${this.getTrimmedChangeSubject(item.subject)} </span>
                 </td>
                 <td><span> ${item.project} </span></td>
                 <td>
                   <span class=${this.computeStatusClass(item, this.statuses)}>
                     ${this.computeStatus(item, this.statuses)}
                   </span>
                 </td>
                 <td>
                   <span class="error">
                     ${this.computeError(item, this.statuses)}
                   </span>
                 </td>
               </tr>
             `
           )}
         </tbody>
       </table>
     `;
   }

   containsDuplicateProject(changes: ChangeInfo[]) {
     const projects: {[projectName: string]: boolean} = {};
     for (let i = 0; i < changes.length; i++) {
       const change = changes[i];
       if (projects[change.project]) {
         return true;
       }
       projects[change.project] = true;
     }
     return false;
   }

   updateChanges(changes: ChangeInfo[]) {
     this.changes = changes;
     this.statuses = {};
     changes.forEach(change => {
       this.selectedChangeIds.add(change.id);
     });
     this.duplicateProjectChanges = this.containsDuplicateProject(changes);
     this.changesCount = changes.length;
     this.showCherryPickTopic = changes.length > 1;
   }

   private updateBranch() {
     const invalidChars = [',', ' '];
     this.invalidBranch = !!(
       this.branch && invalidChars.some(c => this.branch.includes(c))
     );
   }

   private isChangeSelected(changeId: ChangeInfoId) {
     return this.selectedChangeIds.has(changeId);
   }

   private toggleChangeSelected(e: Event) {
     const changeId = (e.target as HTMLElement).dataset['item']! as ChangeInfoId;
     if (this.selectedChangeIds.has(changeId))
       this.selectedChangeIds.delete(changeId);
     else this.selectedChangeIds.add(changeId);
     const changes = this.changes.filter(change =>
       this.selectedChangeIds.has(change.id)
     );
     this.duplicateProjectChanges = this.containsDuplicateProject(changes);
   }

   private computeTopicErrorMessage() {
     if (this.duplicateProjectChanges) {
       return 'Two changes cannot be of the same project';
     }
     return '';
   }

   updateStatus(change: ChangeInfo, status: Status) {
     this.statuses = {...this.statuses, [change.id]: status};
   }

   private computeStatus(change: ChangeInfo, statuses: Statuses) {
     if (!change || !statuses || !statuses[change.id])
       return ProgressStatus.NOT_STARTED;
     return statuses[change.id].status;
   }

   computeStatusClass(change: ChangeInfo, statuses: Statuses) {
     if (!change || !statuses || !statuses[change.id]) return '';
     return statuses[change.id].status === ProgressStatus.FAILED ? 'error' : '';
   }

   private computeError(change: ChangeInfo, statuses: Statuses) {
     if (!change || !statuses || !statuses[change.id]) return '';
     if (statuses[change.id].status === ProgressStatus.FAILED) {
       return statuses[change.id].msg;
     }
     return '';
   }

   private getChangeId(change: ChangeInfo) {
     return change.change_id.substring(0, 10);
   }

   private getTrimmedChangeSubject(subject: string) {
     if (!subject) return '';
     if (subject.length < CHANGE_SUBJECT_LIMIT) return subject;
     return subject.substring(0, CHANGE_SUBJECT_LIMIT) + '...';
   }

   private computeCancelLabel() {
     const isRunningChange = Object.values(this.statuses).some(
       v => v.status === ProgressStatus.RUNNING
     );
     return isRunningChange ? 'Close' : 'Cancel';
   }

   private computeDisableCherryPick(
     cherryPickType: CherryPickType,
     duplicateProjectChanges: boolean,
     statuses: Statuses,
     branch: BranchName
   ) {
     if (!branch) return true;
     const duplicateProject =
       cherryPickType === CherryPickType.TOPIC && duplicateProjectChanges;
     if (duplicateProject) return true;
     if (!statuses) return false;
     const isRunningChange = Object.values(statuses).some(
       v => v.status === ProgressStatus.RUNNING
     );
     return isRunningChange;
   }

   private handlecherryPickSingleChangeClicked() {
     this.cherryPickType = CherryPickType.SINGLE_CHANGE;
     fire(this, 'iron-resize', {});
   }

   private handlecherryPickTopicClicked() {
     this.cherryPickType = CherryPickType.TOPIC;
     fire(this, 'iron-resize', {});
   }

   private computeMessage() {
     if (
       this.changeStatus === undefined ||
       this.commitNum === undefined ||
       this.commitMessage === undefined
     ) {
       return;
     }

     let newMessage = this.commitMessage;

     if (this.changeStatus === 'MERGED') {
       if (!newMessage.endsWith('\n')) {
         newMessage += '\n';
       }
       newMessage += '(cherry picked from commit ' + this.commitNum + ')';
     }
     this.message = newMessage;
   }

   private generateRandomCherryPickTopic(change: ChangeInfo) {
     const message = `cherrypick-${change.topic}-${uuid()}`;
     return message;
   }

   private handleCherryPickFailed(
     change: ChangeInfo,
     response?: Response | null
   ) {
     if (!response) return;
     response.text().then((errText: string) => {
       this.updateStatus(change, {status: ProgressStatus.FAILED, msg: errText});
     });
   }

   private handleCherryPickTopic() {
     const changes = this.changes.filter(change =>
       this.selectedChangeIds.has(change.id)
     );
     if (!changes.length) {
       const errorSpan = this.shadowRoot?.querySelector('.error-message');
       errorSpan!.innerHTML = 'No change selected';
       return;
     }
     const topic = this.generateRandomCherryPickTopic(changes[0]);
     changes.forEach(change => {
       this.updateStatus(change, {status: ProgressStatus.RUNNING});
       const payload = {
         destination: this.branch,
         base: null,
         topic,
         allow_conflicts: true,
         allow_empty: true,
       };
       const handleError = (response?: Response | null) => {
         this.handleCherryPickFailed(change, response);
       };
       // revisions and current_revision must exist hence casting
       const patchNum = change.revisions![change.current_revision!]._number;
       this.restApiService
         .executeChangeAction(
           change._number,
           HttpMethod.POST,
           '/cherrypick',
           patchNum,
           payload,
           handleError
         )
         .then(() => {
           this.updateStatus(change, {status: ProgressStatus.SUCCESSFUL});
           const failedOrPending = Object.values(this.statuses).find(
             v => v.status !== ProgressStatus.SUCCESSFUL
           );
           if (!failedOrPending) {
             // This needs some more work, as the new topic may not always be
             // created, instead we may end up creating a new patchset */
             this.getNavigation().setUrl(
               createSearchUrl({topic: topic as TopicName})
             );
           }
         });
     });
   }

   private handleConfirmTap(e: Event) {
     e.preventDefault();
     e.stopPropagation();
     if (this.cherryPickType === CherryPickType.TOPIC) {
       this.reporting.reportInteraction('cherry-pick-topic-clicked', {});
       this.handleCherryPickTopic();
       return;
     }
     // Cherry pick single change
     fireNoBubble(this, 'confirm', {});
   }

   private handleCancelTap(e: Event) {
     e.preventDefault();
     e.stopPropagation();
     fireNoBubble(this, 'cancel', {});
   }

   resetFocus() {
     this.branchInput.focus();
   }

   async getProjectBranchesSuggestions(
     input: string
   ): Promise<AutocompleteSuggestion[]> {
     if (!this.project) return Promise.reject(new Error('Missing project'));
     if (input.startsWith('refs/heads/')) {
       input = input.substring('refs/heads/'.length);
     }
     return this.restApiService
       .getRepoBranches(
         input,
         this.project,
         SUGGESTIONS_LIMIT,
         /* offset=*/ undefined,
         throwingErrorCallback
       )
       .then(response => {
         if (!response) return [];
         const branches: Array<{name: BranchName}> = [];
         for (const branchInfo of response) {
           let name: string = branchInfo.ref;
           if (name.startsWith('refs/heads/')) {
             name = name.substring('refs/heads/'.length);
           }
           branches.push({name: name as BranchName});
         }
         return branches;
       });
   }
 }
	/**
	* @license
	* Copyright 2016 Google LLC
	* SPDX-License-Identifier: Apache-2.0
	*/
	import '@polymer/iron-autogrow-textarea/iron-autogrow-textarea';
	import '@polymer/iron-input/iron-input';
	import '../../../styles/shared-styles';
	import '../../shared/gr-autocomplete/gr-autocomplete';
	import '../../shared/gr-dialog/gr-dialog';
	import {navigationToken} from '../../core/gr-navigation/gr-navigation';
	import {getAppContext} from '../../../services/app-context';
	import {
	ChangeInfo,
	BranchName,
	RepoName,
	CommitId,
	ChangeInfoId,
	TopicName,
	ChangeActionDialog,
	} from '../../../types/common';
	import {customElement, property, query, state} from 'lit/decorators.js';
	import {
	AutocompleteQuery,
	AutocompleteSuggestion,
	GrTypedAutocomplete,
	} from '../../shared/gr-autocomplete/gr-autocomplete';
	import {
	HttpMethod,
	ChangeStatus,
	ProgressStatus,
	} from '../../../constants/constants';
	import {fire, fireNoBubble} from '../../../utils/event-util';
	import {css, html, LitElement, PropertyValues} from 'lit';
	import {sharedStyles} from '../../../styles/shared-styles';
	import {choose} from 'lit/directives/choose.js';
	import {when} from 'lit/directives/when.js';
	import {BindValueChangeEvent} from '../../../types/events';
	import {resolve} from '../../../models/dependency';
	import {createSearchUrl} from '../../../models/views/search';
	import {throwingErrorCallback} from '../../shared/gr-rest-api-interface/gr-rest-apis/gr-rest-api-helper';
	import {uuid} from '../../../utils/common-util';

	const SUGGESTIONS_LIMIT = 15;
	const CHANGE_SUBJECT_LIMIT = 50;
	enum CherryPickType {
	SINGLE_CHANGE = 1,
	TOPIC,
	}

	export type Statuses = {[changeId: string]: Status};

	interface Status {
	status: ProgressStatus;
	msg?: string;
	}

	declare global {
	interface HTMLElementTagNameMap {
	'gr-confirm-cherrypick-dialog': GrConfirmCherrypickDialog;
	}
	}

	@customElement('gr-confirm-cherrypick-dialog')
	export class GrConfirmCherrypickDialog
	extends LitElement
	implements ChangeActionDialog
	{
	/**
	* Fired when the confirm button is pressed.
	*
	* @event confirm
	*/

	/**
	* Fired when the cancel button is pressed.
	*
	* @event cancel
	*/

	@property({type: String})
	branch = '' as BranchName;

	@property({type: String})
	baseCommit?: string;

	@property({type: String})
	changeStatus?: ChangeStatus;

	@property({type: String})
	commitMessage?: string;

	@property({type: String})
	commitNum?: CommitId;

	@property({type: String})
	message = '';

	@property({type: String})
	project?: RepoName;

	@property({type: Array})
	changes: ChangeInfo[] = [];

	@state()
	private query: AutocompleteQuery;

	@state()
	private showCherryPickTopic = false;

	@state()
	private changesCount?: number;

	@state()
	cherryPickType = CherryPickType.SINGLE_CHANGE;

	@state()
	private duplicateProjectChanges = false;

	@state()
	// Status of each change that is being cherry picked together
	private statuses: Statuses;

	@state()
	private invalidBranch = false;

	@query('#branchInput')
	branchInput!: GrTypedAutocomplete<BranchName>;

	private selectedChangeIds = new Set<ChangeInfoId>();

	private readonly restApiService = getAppContext().restApiService;

	private readonly reporting = getAppContext().reportingService;

	private readonly getNavigation = resolve(this, navigationToken);

	constructor() {
	super();
	this.statuses = {};
	this.query = (text: string) => this.getProjectBranchesSuggestions(text);
	}

	override willUpdate(changedProperties: PropertyValues) {
	if (changedProperties.has('branch')) {
	this.updateBranch();
	}
	if (
	changedProperties.has('changeStatus') \|\|
	changedProperties.has('commitNum') \|\|
	changedProperties.has('commitMessage')
	) {
	this.computeMessage();
	}
	}

	static override styles = [
	sharedStyles,
	css`
	:host {
	display: block;
	}
	:host([disabled]) {
	opacity: 0.5;
	pointer-events: none;
	}
	label {
	cursor: pointer;
	}
	.main {
	display: flex;
	flex-direction: column;
	width: 100%;
	}
	.main label,
	.main input[type='text'] {
	display: block;
	width: 100%;
	}
	iron-autogrow-textarea {
	font-family: var(--monospace-font-family);
	font-size: var(--font-size-mono);
	line-height: var(--line-height-mono);
	width: 73ch; /* Add a char to account for the border. */
	}
	.cherryPickTopicLayout {
	display: flex;
	align-items: center;
	margin-bottom: var(--spacing-m);
	}
	.cherryPickSingleChange,
	.cherryPickTopic {
	margin-left: var(--spacing-m);
	}
	.cherry-pick-topic-message {
	margin-bottom: var(--spacing-m);
	}
	label[for='messageInput'],
	label[for='baseInput'] {
	margin-top: var(--spacing-m);
	}
	.title {
	font-weight: var(--font-weight-bold);
	}
	tr > td {
	padding: var(--spacing-m);
	}
	th {
	color: var(--deemphasized-text-color);
	}
	table {
	border-collapse: collapse;
	}
	tr {
	border-bottom: 1px solid var(--border-color);
	}
	.error {
	color: var(--error-text-color);
	}
	.error-message {
	color: var(--error-text-color);
	margin: var(--spacing-m) 0 var(--spacing-m) 0;
	}
	`,
	];

	override render() {
	return html`
	<gr-dialog
	confirm-label="Cherry Pick"
	.cancelLabel=${this.computeCancelLabel()}
	?disabled=${this.computeDisableCherryPick(
	this.cherryPickType,
	this.duplicateProjectChanges,
	this.statuses,
	this.branch
	)}
	@confirm=${this.handleConfirmTap}
	@cancel=${this.handleCancelTap}
	>
	<div class="header title" slot="header">
	Cherry Pick Change to Another Branch
	</div>
	<div class="main" slot="main">
	<gr-endpoint-decorator name="cherrypick-main">
	<gr-endpoint-param name="changes" .value=${this.changes}>
	</gr-endpoint-param>
	<gr-endpoint-slot name="top"></gr-endpoint-slot>
	${when(this.showCherryPickTopic, () =>
	this.renderCherrypickTopicLayout()
	)}
	<label for="branchInput"> Cherry Pick to branch </label>
	<gr-autocomplete
	id="branchInput"
	.text=${this.branch}
	.query=${this.query}
	placeholder="Destination branch"
	@text-changed=${(e: BindValueChangeEvent) =>
	(this.branch = e.detail.value as BranchName)}
	>
	</gr-autocomplete>
	${when(
	this.invalidBranch,
	() => html`
	<span class="error"
	>Branch name cannot contain space or commas.</span
	>
	`
	)}
	${choose(this.cherryPickType, [
	[
	CherryPickType.SINGLE_CHANGE,
	() => this.renderCherrypickSingleChangeInputs(),
	],
	[CherryPickType.TOPIC, () => this.renderCherrypickTopicTable()],
	])}
	<gr-endpoint-slot name="bottom"></gr-endpoint-slot>
	</gr-endpoint-decorator>
	</div>
	</gr-dialog>
	`;
	}

	private renderCherrypickTopicLayout() {
	return html`
	<div class="cherryPickTopicLayout">
	<input
	name="cherryPickOptions"
	type="radio"
	id="cherryPickSingleChange"
	@change=${this.handlecherryPickSingleChangeClicked}
	checked
	/>
	<label for="cherryPickSingleChange" class="cherryPickSingleChange">
	Cherry Pick single change
	</label>
	</div>
	<div class="cherryPickTopicLayout">
	<input
	name="cherryPickOptions"
	type="radio"
	id="cherryPickTopic"
	@change=${this.handlecherryPickTopicClicked}
	/>
	<label for="cherryPickTopic" class="cherryPickTopic">
	Cherry Pick entire topic (${this.changesCount} Changes)
	</label>
	</div>
	`;
	}

	private renderCherrypickSingleChangeInputs() {
	return html`
	<label for="baseInput"> Provide base commit sha1 for cherry-pick </label>
	<iron-input
	.bindValue=${this.baseCommit}
	@bind-value-changed=${(e: BindValueChangeEvent) =>
	(this.baseCommit = e.detail.value)}
	>
	<input
	is="iron-input"
	id="baseCommitInput"
	maxlength="40"
	placeholder="(optional)"
	/>
	</iron-input>
	<label for="messageInput"> Cherry Pick Commit Message </label>
	<iron-autogrow-textarea
	id="messageInput"
	class="message"
	autocomplete="on"
	rows="4"
	.maxRows=${15}
	.bindValue=${this.message}
	@bind-value-changed=${(e: BindValueChangeEvent) =>
	(this.message = e.detail.value ?? '')}
	></iron-autogrow-textarea>
	`;
	}

	private renderCherrypickTopicTable() {
	return html`
	<span class="error-message">${this.computeTopicErrorMessage()}</span>
	<span class="cherry-pick-topic-message">
	Commit Message will be auto generated
	</span>
	<table>
	<thead>
	<tr>
	<th></th>
	<th>Change</th>
	<th>Status</th>
	<th>Subject</th>
	<th>Project</th>
	<th>Progress</th>
	<!-- Error Message -->
	<th></th>
	</tr>
	</thead>
	<tbody>
	${this.changes.map(
	item => html`
	<tr>
	<td>
	<input
	type="checkbox"
	data-item=${item.id as string}
	@change=${this.toggleChangeSelected}
	?checked=${this.isChangeSelected(item.id)}
	/>
	</td>
	<td><span> ${this.getChangeId(item)} </span></td>
	<td><span> ${item.status} </span></td>
	<td>
	<span> ${this.getTrimmedChangeSubject(item.subject)} </span>
	</td>
	<td><span> ${item.project} </span></td>
	<td>
	<span class=${this.computeStatusClass(item, this.statuses)}>
	${this.computeStatus(item, this.statuses)}
	</span>
	</td>
	<td>
	<span class="error">
	${this.computeError(item, this.statuses)}
	</span>
	</td>
	</tr>
	`
	)}
	</tbody>
	</table>
	`;
	}

	containsDuplicateProject(changes: ChangeInfo[]) {
	const projects: {[projectName: string]: boolean} = {};
	for (let i = 0; i < changes.length; i++) {
	const change = changes[i];
	if (projects[change.project]) {
	return true;
	}
	projects[change.project] = true;
	}
	return false;
	}

	updateChanges(changes: ChangeInfo[]) {
	this.changes = changes;
	this.statuses = {};
	changes.forEach(change => {
	this.selectedChangeIds.add(change.id);
	});
	this.duplicateProjectChanges = this.containsDuplicateProject(changes);
	this.changesCount = changes.length;
	this.showCherryPickTopic = changes.length > 1;
	}

	private updateBranch() {
	const invalidChars = [',', ' '];
	this.invalidBranch = !!(
	this.branch && invalidChars.some(c => this.branch.includes(c))
	);
	}

	private isChangeSelected(changeId: ChangeInfoId) {
	return this.selectedChangeIds.has(changeId);
	}

	private toggleChangeSelected(e: Event) {
	const changeId = (e.target as HTMLElement).dataset['item']! as ChangeInfoId;
	if (this.selectedChangeIds.has(changeId))
	this.selectedChangeIds.delete(changeId);
	else this.selectedChangeIds.add(changeId);
	const changes = this.changes.filter(change =>
	this.selectedChangeIds.has(change.id)
	);
	this.duplicateProjectChanges = this.containsDuplicateProject(changes);
	}

	private computeTopicErrorMessage() {
	if (this.duplicateProjectChanges) {
	return 'Two changes cannot be of the same project';
	}
	return '';
	}

	updateStatus(change: ChangeInfo, status: Status) {
	this.statuses = {...this.statuses, [change.id]: status};
	}

	private computeStatus(change: ChangeInfo, statuses: Statuses) {
	if (!change \|\| !statuses \|\| !statuses[change.id])
	return ProgressStatus.NOT_STARTED;
	return statuses[change.id].status;
	}

	computeStatusClass(change: ChangeInfo, statuses: Statuses) {
	if (!change \|\| !statuses \|\| !statuses[change.id]) return '';
	return statuses[change.id].status === ProgressStatus.FAILED ? 'error' : '';
	}

	private computeError(change: ChangeInfo, statuses: Statuses) {
	if (!change \|\| !statuses \|\| !statuses[change.id]) return '';
	if (statuses[change.id].status === ProgressStatus.FAILED) {
	return statuses[change.id].msg;
	}
	return '';
	}

	private getChangeId(change: ChangeInfo) {
	return change.change_id.substring(0, 10);
	}

	private getTrimmedChangeSubject(subject: string) {
	if (!subject) return '';
	if (subject.length < CHANGE_SUBJECT_LIMIT) return subject;
	return subject.substring(0, CHANGE_SUBJECT_LIMIT) + '...';
	}

	private computeCancelLabel() {
	const isRunningChange = Object.values(this.statuses).some(
	v => v.status === ProgressStatus.RUNNING
	);
	return isRunningChange ? 'Close' : 'Cancel';
	}

	private computeDisableCherryPick(
	cherryPickType: CherryPickType,
	duplicateProjectChanges: boolean,
	statuses: Statuses,
	branch: BranchName
	) {
	if (!branch) return true;
	const duplicateProject =
	cherryPickType === CherryPickType.TOPIC && duplicateProjectChanges;
	if (duplicateProject) return true;
	if (!statuses) return false;
	const isRunningChange = Object.values(statuses).some(
	v => v.status === ProgressStatus.RUNNING
	);
	return isRunningChange;
	}

	private handlecherryPickSingleChangeClicked() {
	this.cherryPickType = CherryPickType.SINGLE_CHANGE;
	fire(this, 'iron-resize', {});
	}

	private handlecherryPickTopicClicked() {
	this.cherryPickType = CherryPickType.TOPIC;
	fire(this, 'iron-resize', {});
	}

	private computeMessage() {
	if (
	this.changeStatus === undefined \|\|
	this.commitNum === undefined \|\|
	this.commitMessage === undefined
	) {
	return;
	}

	let newMessage = this.commitMessage;

	if (this.changeStatus === 'MERGED') {
	if (!newMessage.endsWith('\n')) {
	newMessage += '\n';
	}
	newMessage += '(cherry picked from commit ' + this.commitNum + ')';
	}
	this.message = newMessage;
	}

	private generateRandomCherryPickTopic(change: ChangeInfo) {
	const message = `cherrypick-${change.topic}-${uuid()}`;
	return message;
	}

	private handleCherryPickFailed(
	change: ChangeInfo,
	response?: Response \| null
	) {
	if (!response) return;
	response.text().then((errText: string) => {
	this.updateStatus(change, {status: ProgressStatus.FAILED, msg: errText});
	});
	}

	private handleCherryPickTopic() {
	const changes = this.changes.filter(change =>
	this.selectedChangeIds.has(change.id)
	);
	if (!changes.length) {
	const errorSpan = this.shadowRoot?.querySelector('.error-message');
	errorSpan!.innerHTML = 'No change selected';
	return;
	}
	const topic = this.generateRandomCherryPickTopic(changes[0]);
	changes.forEach(change => {
	this.updateStatus(change, {status: ProgressStatus.RUNNING});
	const payload = {
	destination: this.branch,
	base: null,
	topic,
	allow_conflicts: true,
	allow_empty: true,
	};
	const handleError = (response?: Response \| null) => {
	this.handleCherryPickFailed(change, response);
	};
	// revisions and current_revision must exist hence casting
	const patchNum = change.revisions![change.current_revision!]._number;
	this.restApiService
	.executeChangeAction(
	change._number,
	HttpMethod.POST,
	'/cherrypick',
	patchNum,
	payload,
	handleError
	)
	.then(() => {
	this.updateStatus(change, {status: ProgressStatus.SUCCESSFUL});
	const failedOrPending = Object.values(this.statuses).find(
	v => v.status !== ProgressStatus.SUCCESSFUL
	);
	if (!failedOrPending) {
	// This needs some more work, as the new topic may not always be
	// created, instead we may end up creating a new patchset */
	this.getNavigation().setUrl(
	createSearchUrl({topic: topic as TopicName})
	);
	}
	});
	});
	}

	private handleConfirmTap(e: Event) {
	e.preventDefault();
	e.stopPropagation();
	if (this.cherryPickType === CherryPickType.TOPIC) {
	this.reporting.reportInteraction('cherry-pick-topic-clicked', {});
	this.handleCherryPickTopic();
	return;
	}
	// Cherry pick single change
	fireNoBubble(this, 'confirm', {});
	}

	private handleCancelTap(e: Event) {
	e.preventDefault();
	e.stopPropagation();
	fireNoBubble(this, 'cancel', {});
	}

	resetFocus() {
	this.branchInput.focus();
	}

	async getProjectBranchesSuggestions(
	input: string
	): Promise<AutocompleteSuggestion[]> {
	if (!this.project) return Promise.reject(new Error('Missing project'));
	if (input.startsWith('refs/heads/')) {
	input = input.substring('refs/heads/'.length);
	}
	return this.restApiService
	.getRepoBranches(
	input,
	this.project,
	SUGGESTIONS_LIMIT,
	/* offset=*/ undefined,
	throwingErrorCallback
	)
	.then(response => {
	if (!response) return [];
	const branches: Array<{name: BranchName}> = [];
	for (const branchInfo of response) {
	let name: string = branchInfo.ref;
	if (name.startsWith('refs/heads/')) {
	name = name.substring('refs/heads/'.length);
	}
	branches.push({name: name as BranchName});
	}
	return branches;
	});
	}
	}