Add basic image uploading in the webview

src/github/githubRepository.ts

@@ -2111,4 +2111,116 @@ export class GitHubRepository extends Disposable {
 		}
 		return CheckState.Success;
 	}
+
+	/**
+	 * Upload a file to GitHub via the mobile upload policy API. Returns a markdown
+	 * snippet appropriate for embedding in an issue/PR comment.
+	 */
+	public async uploadFile(uri: vscode.Uri, fileName: string): Promise<string> {
+		// Guard against very large files: check size before reading the bytes into memory.
+		let fileSize: number | undefined;
+		try {
+			const stat = await vscode.workspace.fs.stat(uri);
+			fileSize = stat.size;
+		} catch {
+			// Fall through; readFile will surface a more specific error if needed.
+		}
+		if (fileSize !== undefined && fileSize > MAX_UPLOAD_SIZE_BYTES) {
+			throw new Error(`File "${fileName}" is too large to upload (${Math.round(fileSize / (1024 * 1024))} MB). The maximum allowed size is ${MAX_UPLOAD_SIZE_BYTES / (1024 * 1024)} MB.`);
+		}
+
+		const fileBytes = await vscode.workspace.fs.readFile(uri);
+		if (fileBytes.byteLength > MAX_UPLOAD_SIZE_BYTES) {
+			throw new Error(`File "${fileName}" is too large to upload (${Math.round(fileBytes.byteLength / (1024 * 1024))} MB). The maximum allowed size is ${MAX_UPLOAD_SIZE_BYTES / (1024 * 1024)} MB.`);
+		}
+		const contentType = guessContentType(fileName);
+
+		const { octokit } = await this.ensure();
+		const metadata = await this.getMetadata();
+		const repositoryId = metadata.id;
+
+		// Step 1: Get upload policy
+		const policyResponse = await octokit.api.request('POST /mobile/upload/policy', {
+			name: fileName,
+			size: fileBytes.byteLength,
+			content_type: contentType,
+			repository_id: repositoryId,
+			headers: { accept: 'application/json' },
+		});
+		const policy = policyResponse.data as {
+			upload_url: string;
+			form: Record<string, string>;
+			asset: { id: number; name: string; href: string };
+			asset_upload_url: string;
+		};
+
+		// Step 2: Upload bytes to the storage location returned by the policy.
+		// Pass the Uint8Array directly to Blob to avoid an extra full-size copy.
+		const formData = new FormData();
+		for (const [key, value] of Object.entries(policy.form)) {
+			formData.append(key, value);
+		}
+		// The DOM Blob types require Uint8Array<ArrayBuffer>, but vscode.workspace.fs.readFile
+		// returns Uint8Array<ArrayBufferLike>. The runtime accepts it, so cast via unknown to avoid a copy.
+		formData.append('file', new Blob([fileBytes as unknown as BlobPart], { type: contentType }), policy.asset.name);
+		const s3Response = await fetch(policy.upload_url, { method: 'POST', body: formData });
+		if (s3Response.status !== 204 && s3Response.status !== 201 && s3Response.status !== 200) {
+			throw new Error(`Storage upload failed with status ${s3Response.status}`);
+		}
+
+		// Step 3: Confirm the upload with GitHub
+		await octokit.api.request(`PUT ${policy.asset_upload_url}`, {
+			headers: { accept: 'application/json' },
+		});
+
+		const url = policy.asset.href;
+		const safeName = escapeMarkdownLinkText(fileName);
+		if (contentType.startsWith('image/')) {
+			return `![${safeName}](${url})`;
+		}
+		if (contentType.startsWith('video/')) {
+			return url;
+		}
+		return `[${safeName}](${url})`;
+	}
+}
+
+const MAX_UPLOAD_SIZE_BYTES = 25 * 1024 * 1024; // 25 MB
+
+/**
+ * Escape characters that would break a markdown link's text segment (`[text](url)`).
+ * Filenames may legally contain `[`, `]`, `\`, etc., which can corrupt the rendered link.
+ */
+function escapeMarkdownLinkText(text: string): string {
+	return text.replace(/([\\\[\]`])/g, '\\$1');
+}
+
+function guessContentType(fileName: string): string {
+	const lastDot = fileName.lastIndexOf('.');
+	const ext = lastDot >= 0 ? fileName.substring(lastDot).toLowerCase() : '';
+	switch (ext) {
+		case '.png': return 'image/png';
+		case '.jpg':
+		case '.jpeg': return 'image/jpeg';
+		case '.gif': return 'image/gif';
+		case '.webp': return 'image/webp';
+		case '.svg': return 'image/svg+xml';
+		case '.bmp': return 'image/bmp';
+		case '.heic': return 'image/heic';
+		case '.mp4': return 'video/mp4';
+		case '.mov': return 'video/quicktime';
+		case '.webm': return 'video/webm';
+		case '.pdf': return 'application/pdf';
+		case '.zip': return 'application/zip';
+		case '.gz': return 'application/gzip';
+		case '.tar': return 'application/x-tar';
+		case '.txt': return 'text/plain';
+		case '.md': return 'text/markdown';
+		case '.json': return 'application/json';
+		case '.log': return 'text/plain';
+		case '.docx': return 'application/vnd.openxmlformats-officedocument.wordprocessingml.document';
+		case '.xlsx': return 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet';
+		case '.pptx': return 'application/vnd.openxmlformats-officedocument.presentationml.presentation';
+		default: return 'application/octet-stream';
+	}
 }

src/github/issueOverview.ts

@@ -4,6 +4,7 @@
  *--------------------------------------------------------------------------------------------*/
 'use strict';
 
+import * as path from 'path';
 import * as vscode from 'vscode';
 import { CloseResult, OpenLocalFileArgs } from '../../common/views';
 import { openPullRequestOnGitHub } from '../commands';
@@ -12,7 +13,7 @@ import { GithubItemStateEnum, IAccount, IMilestone, IProject, IProjectItem, Repo
 import { IssueModel } from './issueModel';
 import { getAssigneesQuickPickItems, getLabelOptions, getMilestoneFromQuickPick, getProjectFromQuickPick } from './quickPicks';
 import { isInCodespaces, processPermalinks, vscodeDevPrLink } from './utils';
-import { ChangeAssigneesReply, DisplayLabel, Issue, ProjectItemsReply, SubmitReviewReply, UnresolvedIdentity } from './views';
+import { ChangeAssigneesReply, DisplayLabel, FileUploadCompletedMessage, Issue, ProjectItemsReply, SubmitReviewReply, UnresolvedIdentity, UploadFilesReply } from './views';
 import { COPILOT_ACCOUNTS, IComment } from '../common/comment';
 import { emojify, ensureEmojis } from '../common/emoji';
 import Logger from '../common/logger';
@@ -452,6 +453,8 @@ export class IssueOverviewPanel<TItem extends IssueModel = IssueModel> extends W
 				return this.openLocalFile(message);
 			case 'pr.debug':
 				return this.webviewDebug(message);
+			case 'pr.upload-files':
+				return this.uploadFiles(message);
 			default:
 				return this.MESSAGE_UNHANDLED;
 		}
@@ -573,6 +576,75 @@ export class IssueOverviewPanel<TItem extends IssueModel = IssueModel> extends W
 		Logger.debug(message.args, IssueOverviewPanel.ID);
 	}
 
+	private async uploadFiles(message: IRequestMessage<void>): Promise<void> {
+		const fileUris = await vscode.window.showOpenDialog({
+			canSelectMany: true,
+			canSelectFiles: true,
+			canSelectFolders: false,
+			openLabel: 'Upload',
+			title: 'Select files to upload',
+		});
+		if (!fileUris || fileUris.length === 0) {
+			const empty: UploadFilesReply = { uploads: [] };
+			return this._replyMessage(message, empty);
+		}
+
+		const used = new Map<string, number>();
+		const uploads = fileUris.map(uri => {
+			const baseName = path.basename(uri.fsPath);
+			const count = used.get(baseName) ?? 0;
+			used.set(baseName, count + 1);
+			const placeholder = count === 0
+				? `<!-- Uploading ${baseName} -->`
+				: `<!-- Uploading ${baseName} (${count + 1}) -->`;
+			return { uri, name: baseName, placeholder };
+		});
+
+		const reply: UploadFilesReply = { uploads: uploads.map(u => ({ name: u.name, placeholder: u.placeholder })) };
+		await this._replyMessage(message, reply);
+
+		// Run uploads with bounded concurrency to avoid spiking memory/network in the extension host.
+		const githubRepository = this._item.githubRepository;
+		const MAX_CONCURRENT_UPLOADS = 3;
+		const queue = uploads.slice();
+		const runOne = async (u: { uri: vscode.Uri; name: string; placeholder: string }) => {
+			try {
+				const markdown = await githubRepository.uploadFile(u.uri, u.name);
+				const completed: FileUploadCompletedMessage = {
+					command: 'pr.file-upload-completed',
+					placeholder: u.placeholder,
+					name: u.name,
+					markdown,
+				};
+				await this._postMessage(completed);
+			} catch (err) {
+				Logger.error(`Failed to upload file ${u.name}: ${formatError(err)}`, IssueOverviewPanel.ID);
+				const completed: FileUploadCompletedMessage = {
+					command: 'pr.file-upload-completed',
+					placeholder: u.placeholder,
+					name: u.name,
+					error: formatError(err),
+				};
+				await this._postMessage(completed);
+			}
+		};
+		const workers: Promise<void>[] = [];
+		for (let i = 0; i < Math.min(MAX_CONCURRENT_UPLOADS, queue.length); i++) {
+			workers.push((async () => {
+				while (queue.length > 0) {
+					const next = queue.shift();
+					if (!next) {
+						break;
+					}
+					await runOne(next);
+				}
+			})());
+		}
+		// Don't await all workers - let them run in the background so this handler returns promptly.
+		Promise.all(workers).catch(err => Logger.error(`Upload worker error: ${formatError(err)}`, IssueOverviewPanel.ID));
+	}
+
+
 	/**
 	 * Process code reference links in bodyHTML. Can be overridden by subclasses (e.g., PullRequestOverviewPanel)
 	 * to provide custom processing logic for different item types.

src/github/views.ts

@@ -179,6 +179,23 @@ export interface CancelCodingAgentReply {
 	events: TimelineEvent[];
 }
 
+export interface FileUploadPlaceholder {
+	name: string;
+	placeholder: string;
+}
+
+export interface UploadFilesReply {
+	uploads: FileUploadPlaceholder[];
+}
+
+export interface FileUploadCompletedMessage {
+	command: 'pr.file-upload-completed';
+	name: string;
+	placeholder: string;
+	markdown?: string;
+	error?: string;
+}
+
 export interface BaseContext {
 	'preventDefaultContextMenuItems': true;
 	owner: string;

webviews/activityBarView/index.css

@@ -42,6 +42,39 @@ textarea {
 	padding-bottom: 16px;
 }
 
+.textarea-wrapper {
+	position: relative;
+	display: flex;
+	width: 100%;
+}
+
+.textarea-wrapper textarea {
+	flex: 1;
+	padding-bottom: 32px;
+}
+
+.textarea-wrapper .comment-upload-button {
+	position: absolute;
+	left: 6px;
+	bottom: 8px;
+	border: none;
+	background: none;
+	padding: 4px;
+	display: flex;
+	align-items: center;
+	justify-content: center;
+	border-radius: 4px;
+	color: var(--vscode-foreground);
+}
+
+.textarea-wrapper .comment-upload-button:hover:not(:disabled) {
+	cursor: pointer;
+	background-color: var(--vscode-toolbar-hoverBackground);
+}
+
+.textarea-wrapper .comment-upload-button:disabled {
+	opacity: 0.5;
+}
 .status-section {
 	padding-bottom: 16px;
 }

webviews/common/context.tsx

@@ -11,7 +11,7 @@ import { CloseResult, DescriptionResult, OpenCommitChangesArgs, OpenLocalFileArg
 import { IComment } from '../../src/common/comment';
 import { EventType, ReviewEvent, SessionLinkInfo, TimelineEvent } from '../../src/common/timelineEvent';
 import { IProjectItem, MergeMethod, PullRequestCheckStatus, ReadyForReview } from '../../src/github/interface';
-import { CancelCodingAgentReply, ChangeAssigneesReply, ChangeBaseReply, ConvertToDraftReply, DeleteReviewResult, MergeArguments, MergeResult, ProjectItemsReply, PullRequest, ReadyForReviewReply, SubmitReviewReply } from '../../src/github/views';
+import { CancelCodingAgentReply, ChangeAssigneesReply, ChangeBaseReply, ConvertToDraftReply, DeleteReviewResult, FileUploadCompletedMessage, MergeArguments, MergeResult, ProjectItemsReply, PullRequest, ReadyForReviewReply, SubmitReviewReply, UploadFilesReply } from '../../src/github/views';
 
 export class PRContext {
 	constructor(
@@ -176,6 +176,61 @@ export class PRContext {
 
 	public submit = (body: string) => this.submitReviewCommand('pr.submit', body);
 
+	private _uploadCompletionHandlers: Map<string, (message: FileUploadCompletedMessage) => void> = new Map();
+
+	/**
+	 * Asks the host to prompt the user for files to upload.
+	 *
+	 * @param insertPlaceholders called once with the textual placeholders to insert into the textarea
+	 * @param replacePlaceholder called as each upload finishes (or fails) to replace the placeholder with the resulting markdown (or remove it on error)
+	 */
+	public uploadFiles = async (
+		insertPlaceholders: (placeholders: string) => void,
+		replacePlaceholder: (placeholder: string, markdownOrEmpty: string) => void,
+	) => {
+		const result: UploadFilesReply | undefined = await this.postMessage({ command: 'pr.upload-files' });
+		if (!result || !result.uploads || result.uploads.length === 0) {
+			return;
+		}
+		const placeholdersText = result.uploads.map(u => u.placeholder).join('\n');
+		insertPlaceholders(placeholdersText);
+		for (const upload of result.uploads) {
+			this._uploadCompletionHandlers.set(upload.placeholder, message => {
+				if (message.error) {
+					replacePlaceholder(message.placeholder, '');
+					this.postMessage({ command: 'alert', args: `Failed to upload ${message.name}: ${message.error}` });
+				} else {
+					replacePlaceholder(message.placeholder, message.markdown ?? '');
+				}
+			});
+		}
+	};
+
+	/**
+	 * Convenience wrapper that uploads files into the current pending comment text in the PR state.
+	 */
+	public uploadFilesIntoPendingComment = () => {
+		return this.uploadFiles(
+			placeholders => {
+				const current = this.pr?.pendingCommentText ?? '';
+				const separator = current.length > 0 && !current.endsWith('\n') ? '\n' : '';
+				this.updatePR({ pendingCommentText: `${current}${separator}${placeholders}\n` });
+			},
+			(placeholder, markdown) => {
+				const current = this.pr?.pendingCommentText ?? '';
+				this.updatePR({ pendingCommentText: current.replace(placeholder, markdown) });
+			},
+		);
+	};
+
+	private completeFileUpload(message: FileUploadCompletedMessage) {
+		const handler = this._uploadCompletionHandlers.get(message.placeholder);
+		if (handler) {
+			this._uploadCompletionHandlers.delete(message.placeholder);
+			handler(message);
+		}
+	}
+
 	public deleteReview = async () => {
 		try {
 			const result: DeleteReviewResult = await this.postMessage({ command: 'pr.delete-review' });
@@ -446,6 +501,8 @@ export class PRContext {
 				return this.updatePR({ busy: true });
 			case 'pr.readied-for-review':
 				return this.readyForReviewComplete(message);
+			case 'pr.file-upload-completed':
+				return this.completeFileUpload(message);
 		}
 	};