Class CacheManager

src/services/code-index/cache-manager.ts:12–127

 * Manages the cache for code indexing
 */
export class CacheManager implements ICacheManager {
	private cachePath: vscode.Uri
	private fileHashes: Record<string, string> = {}
	private _debouncedSaveCache: () => void

	/**
	 * Creates a new cache manager
	 * @param context VS Code extension context
	 * @param workspacePath Path to the workspace
	 */
	constructor(
		private context: vscode.ExtensionContext,
		private workspacePath: string,
	) {
		this.cachePath = vscode.Uri.joinPath(
			context.globalStorageUri,
			`roo-index-cache-${createHash("sha256").update(workspacePath).digest("hex")}.json`,
		)
		this._debouncedSaveCache = debounce(async () => {
			await this._performSave()
		}, 1500)
	}

	/**
	 * Initializes the cache manager by loading the cache file
	 */
	async initialize(): Promise<void> {
		try {
			const cacheData = await vscode.workspace.fs.readFile(this.cachePath)
			this.fileHashes = JSON.parse(cacheData.toString())
		} catch (error) {
			this.fileHashes = {}
			TelemetryService.instance.captureEvent(TelemetryEventName.CODE_INDEX_ERROR, {
				error: error instanceof Error ? error.message : String(error),
				stack: error instanceof Error ? error.stack : undefined,
				location: "initialize",
			})
		}
	}

	/**
	 * Saves the cache to disk
	 */
	private async _performSave(): Promise<void> {
		try {
			await safeWriteJson(this.cachePath.fsPath, this.fileHashes)
		} catch (error) {
			console.error("Failed to save cache:", error)
			TelemetryService.instance.captureEvent(TelemetryEventName.CODE_INDEX_ERROR, {
				error: error instanceof Error ? error.message : String(error),
				stack: error instanceof Error ? error.stack : undefined,
				location: "_performSave",
			})
		}
	}

	/**
	 * Clears the cache file by writing an empty object to it