Add template count query and hide Change template button when <=1 template

Co-authored-by: alexr00 <38270282+alexr00@users.noreply.github.com>

Author: Copilot

common/views.ts

@@ -131,6 +131,7 @@ export interface CreateParamsNew {
 	creating: boolean;
 	reviewing: boolean;
 	usingTemplate: boolean;
+	templateCount?: number;
 }
 
 export interface ChooseRemoteAndBranchArgs {

src/github/createPRViewProvider.ts

@@ -210,12 +210,13 @@ export abstract class BaseCreatePullRequestViewProvider<T extends BasePullReques
 
 		const defaultBaseBranch = detectedBaseMetadata?.branch ?? this._pullRequestDefaults.base;
 
-		const [defaultTitleAndDescription, mergeConfiguration, viewerPermission, mergeQueueMethodForBranch, labels] = await Promise.all([
+		const [defaultTitleAndDescription, mergeConfiguration, viewerPermission, mergeQueueMethodForBranch, labels, templateCount] = await Promise.all([
 			this.getTitleAndDescription(defaultCompareBranch, defaultBaseBranch),
 			this.getMergeConfiguration(defaultBaseRemote.owner, defaultBaseRemote.repositoryName),
 			defaultOrigin.getViewerPermission(),
 			this._folderRepositoryManager.mergeQueueMethodForBranch(defaultBaseBranch, defaultBaseRemote.owner, defaultBaseRemote.repositoryName),
-			this.getPullRequestDefaultLabels(defaultBaseRemote)
+			this.getPullRequestDefaultLabels(defaultBaseRemote),
+			this._folderRepositoryManager.getPullRequestTemplateCount(defaultBaseRemote.owner)
 		]);
 
 		const defaultCreateOption = vscode.workspace.getConfiguration(PR_SETTINGS_NAMESPACE).get<'lastUsed' | 'create' | 'createDraft' | 'createAutoMerge'>(DEFAULT_CREATE_OPTION, 'lastUsed');
@@ -279,7 +280,8 @@ export abstract class BaseCreatePullRequestViewProvider<T extends BasePullReques
 			preReviewState: PreReviewState.None,
 			preReviewer: preReviewer?.title,
 			reviewing: false,
-			usingTemplate
+			usingTemplate,
+			templateCount
 		};
 
 		return params;

src/github/folderRepositoryManager.ts

@@ -1511,6 +1511,28 @@ export class FolderRepositoryManager extends Disposable {
 		}
 	}
 
+	async getPullRequestTemplateCount(owner: string): Promise<number> {
+		try {
+			const repository = this.gitHubRepositories.find(repo => repo.remote.owner === owner);
+			if (!repository) {
+				return 0;
+			}
+			let count = await repository.getPullRequestTemplateCount();
+
+			// If there's no local template, look for owner-wide templates
+			if (count === 0) {
+				const githubRepository = await this.createGitHubRepositoryFromOwnerName(owner, '.github');
+				if (githubRepository) {
+					count = await githubRepository.getPullRequestTemplateCount();
+				}
+			}
+			return count;
+		} catch (e) {
+			Logger.error(`Error fetching pull request template count for ${owner}: ${e instanceof Error ? e.message : e}`, this.id);
+			return 0;
+		}
+	}
+
 	private async getPullRequestTemplateWithCache(owner: string): Promise<string | undefined> {
 		const cacheLocation = `${CACHED_TEMPLATE_BODY}+${this.repository.rootUri.toString()}`;
 

src/github/githubRepository.ts

@@ -505,6 +505,27 @@ export class GitHubRepository extends Disposable {
 		}
 	}
 
+	async getPullRequestTemplateCount(): Promise<number> {
+		try {
+			Logger.debug('Fetch pull request template count - enter', this.id);
+			const { query, remote, schema } = await this.ensure();
+
+			const result = await query<PullRequestTemplatesResponse>({
+				query: schema.PullRequestTemplateCount,
+				variables: {
+					owner: remote.owner,
+					name: remote.repositoryName,
+				}
+			});
+
+			Logger.debug('Fetch pull request template count - done', this.id);
+			return result.data.repository.pullRequestTemplates?.length ?? 0;
+		} catch (e) {
+			Logger.debug('Failed to fetch pull request template count', this.id);
+			return 0;
+		}
+	}
+
 	private _repoAccessAndMergeMethods: RepoAccessAndMergeMethods | undefined;
 	async getRepoAccessAndMergeMethods(refetch: boolean = false): Promise<RepoAccessAndMergeMethods> {
 		try {

src/github/queriesShared.gql

@@ -720,6 +720,14 @@ query PullRequestTemplates($owner: String!, $name: String!) {
 	}
 }
 
+query PullRequestTemplateCount($owner: String!, $name: String!) {
+	repository(owner: $owner, name: $name) {
+		pullRequestTemplates {
+			body
+		}
+	}
+}
+
 fragment PullRequestNumberFragment on PullRequest {
 	number
 	title

webviews/createPullRequestViewNew/app.tsx

@@ -340,7 +340,7 @@ export function main() {
 					<div className='description-title'>
 						<label htmlFor='description' className='input-title'>Description</label>
 						<div className='description-actions'>
-							{ctx.createParams.usingTemplate ?
+							{ctx.createParams.usingTemplate && (ctx.createParams.templateCount ?? 0) > 1 ?
 								<a title='Change template' className={`title-action icon-button${isBusy || !ctx.initialized ? ' disabled' : ''}`} onClick={() => changeTemplate()} tabIndex={0}>{notebookTemplate}</a> : null}
 							<a role='button' title='Open pull request description settings' aria-label='Open pull request description settings' className='icon-button' onClick={openDescriptionSettings} tabIndex={0}>{settingsIcon}</a>
 						</div>