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Diffstat (limited to 'packages/cli/src/utils/getFolderStructure.ts')
| -rw-r--r-- | packages/cli/src/utils/getFolderStructure.ts | 349 |
1 files changed, 349 insertions, 0 deletions
diff --git a/packages/cli/src/utils/getFolderStructure.ts b/packages/cli/src/utils/getFolderStructure.ts new file mode 100644 index 00000000..386ed9ea --- /dev/null +++ b/packages/cli/src/utils/getFolderStructure.ts @@ -0,0 +1,349 @@ +import * as fs from 'fs/promises'; +import * as path from 'path'; + +const MAX_ITEMS = 200; +const TRUNCATION_INDICATOR = '...'; +const DEFAULT_IGNORED_FOLDERS = new Set(['node_modules', '.git', 'dist']); + +// --- Interfaces --- + +/** Options for customizing folder structure retrieval. */ +interface FolderStructureOptions { + /** Maximum number of files and folders combined to display. Defaults to 200. */ + maxItems?: number; + /** Set of folder names to ignore completely. Case-sensitive. */ + ignoredFolders?: Set<string>; + /** Optional regex to filter included files by name. */ + fileIncludePattern?: RegExp; +} + +// Define a type for the merged options where fileIncludePattern remains optional +type MergedFolderStructureOptions = Required<Omit<FolderStructureOptions, 'fileIncludePattern'>> & { + fileIncludePattern?: RegExp; +}; + + +/** Represents the full, unfiltered information about a folder and its contents. */ +interface FullFolderInfo { + name: string; + path: string; + files: string[]; + subFolders: FullFolderInfo[]; + totalChildren: number; // Total files + subfolders recursively + totalFiles: number; // Total files recursively + isIgnored?: boolean; // Flag to easily identify ignored folders later +} + +/** Represents the potentially truncated structure used for display. */ +interface ReducedFolderNode { + name: string; // Folder name + isRoot?: boolean; + files: string[]; // File names, might end with '...' + subFolders: ReducedFolderNode[]; // Subfolders, might be truncated + hasMoreFiles?: boolean; // Indicates if files were truncated for this specific folder + hasMoreSubfolders?: boolean; // Indicates if subfolders were truncated for this specific folder +} + +// --- Helper Functions --- + +/** + * Recursively reads the full directory structure without truncation. + * Ignored folders are included but not recursed into. + * @param folderPath The absolute path to the folder. + * @param options Configuration options. + * @returns A promise resolving to the FullFolderInfo or null if access denied/not found. + */ +async function readFullStructure( + folderPath: string, + options: MergedFolderStructureOptions +): Promise<FullFolderInfo | null> { + const name = path.basename(folderPath); + // Initialize with isIgnored: false + const folderInfo: Omit<FullFolderInfo, 'totalChildren' | 'totalFiles'> = { + name: name, + path: folderPath, + files: [], + subFolders: [], + isIgnored: false, + }; + + let totalChildrenCount = 0; + let totalFileCount = 0; + + try { + const entries = await fs.readdir(folderPath, { withFileTypes: true }); + + // Process directories first + for (const entry of entries) { + if (entry.isDirectory()) { + const subFolderName = entry.name; + const subFolderPath = path.join(folderPath, subFolderName); + + // Check if the folder should be ignored + if (options.ignoredFolders.has(subFolderName)) { + // Add ignored folder node but don't recurse + const ignoredFolderInfo: FullFolderInfo = { + name: subFolderName, + path: subFolderPath, + files: [], + subFolders: [], + totalChildren: 0, // No children explored + totalFiles: 0, // No files explored + isIgnored: true, // Mark as ignored + }; + folderInfo.subFolders.push(ignoredFolderInfo); + // Skip recursion for this folder + continue; + } + + // If not ignored, recurse as before + const subFolderInfo = await readFullStructure(subFolderPath, options); + // Add non-empty folders OR explicitly ignored folders + if (subFolderInfo && (subFolderInfo.totalChildren > 0 || subFolderInfo.files.length > 0 || subFolderInfo.isIgnored)) { + folderInfo.subFolders.push(subFolderInfo); + } + } + } + + // Then process files (only if the current folder itself isn't marked as ignored) + for (const entry of entries) { + if (entry.isFile()) { + const fileName = entry.name; + // Include if no pattern or if pattern matches + if (!options.fileIncludePattern || options.fileIncludePattern.test(fileName)) { + folderInfo.files.push(fileName); + } + } + } + + // Calculate totals *after* processing children + // Ignored folders contribute 0 to counts here because we didn't look inside. + totalFileCount = folderInfo.files.length + folderInfo.subFolders.reduce((sum, sf) => sum + sf.totalFiles, 0); + // Count the ignored folder itself as one child item in the parent's count. + totalChildrenCount = folderInfo.files.length + folderInfo.subFolders.length + folderInfo.subFolders.reduce((sum, sf) => sum + sf.totalChildren, 0); + + } catch (error: any) { + if (error.code === 'EACCES' || error.code === 'ENOENT') { + console.warn(`Warning: Could not read directory ${folderPath}: ${error.message}`); + return null; + } + throw error; + } + + return { + ...(folderInfo as FullFolderInfo), // Cast needed after conditional assignment check + totalChildren: totalChildrenCount, + totalFiles: totalFileCount, + }; +} + +/** + * Reduces the full folder structure based on the maxItems limit using BFS. + * Handles explicitly ignored folders by showing them with a truncation indicator. + * @param fullInfo The complete folder structure info. + * @param maxItems The maximum number of items (files + folders) to include. + * @param ignoredFolders The set of folder names that were ignored during the read phase. + * @returns The root node of the reduced structure. + */ +function reduceStructure( + fullInfo: FullFolderInfo, + maxItems: number, + ignoredFolders: Set<string> // Pass ignoredFolders for checking +): ReducedFolderNode { + const rootReducedNode: ReducedFolderNode = { name: fullInfo.name, files: [], subFolders: [], isRoot: true }; + const queue: Array<{ original: FullFolderInfo; reduced: ReducedFolderNode }> = []; + + // Don't count the root itself towards the limit initially + queue.push({ original: fullInfo, reduced: rootReducedNode }); + let itemCount = 0; // Count folders + files added to the reduced structure + + while (queue.length > 0) { + const { original: originalFolder, reduced: reducedFolder } = queue.shift()!; + + // If the folder being processed was itself marked as ignored (shouldn't happen for root) + if (originalFolder.isIgnored) { + continue; + } + + // Process Files + let fileLimitReached = false; + for (const file of originalFolder.files) { + // Check limit *before* adding the file + if (itemCount >= maxItems) { + if (!fileLimitReached) { + reducedFolder.files.push(TRUNCATION_INDICATOR); + reducedFolder.hasMoreFiles = true; + fileLimitReached = true; + } + break; + } + reducedFolder.files.push(file); + itemCount++; + } + + // Process Subfolders + let subfolderLimitReached = false; + for (const subFolder of originalFolder.subFolders) { + // Count the folder itself towards the limit + itemCount++; + if (itemCount > maxItems) { + if (!subfolderLimitReached) { + // Add a placeholder node ONLY if we haven't already added one + const truncatedSubfolderNode: ReducedFolderNode = { + name: subFolder.name, + files: [TRUNCATION_INDICATOR], // Generic truncation + subFolders: [], + hasMoreFiles: true, + }; + reducedFolder.subFolders.push(truncatedSubfolderNode); + reducedFolder.hasMoreSubfolders = true; + subfolderLimitReached = true; + } + continue; // Stop processing further subfolders for this parent + } + + // Handle explicitly ignored folders identified during the read phase + if (subFolder.isIgnored) { + const ignoredReducedNode: ReducedFolderNode = { + name: subFolder.name, + files: [TRUNCATION_INDICATOR], // Indicate contents ignored/truncated + subFolders: [], + hasMoreFiles: true, // Mark as truncated + }; + reducedFolder.subFolders.push(ignoredReducedNode); + // DO NOT add the ignored folder to the queue for further processing + } + else { + // If not ignored and within limit, create the reduced node and add to queue + const reducedSubFolder: ReducedFolderNode = { name: subFolder.name, files: [], subFolders: [] }; + reducedFolder.subFolders.push(reducedSubFolder); + queue.push({ original: subFolder, reduced: reducedSubFolder }); + } + } + } + + return rootReducedNode; +} + +/** Calculates the total number of items present in the reduced structure. */ +function countReducedItems(node: ReducedFolderNode): number { + let count = 0; + // Count files, treating '...' as one item if present + count += node.files.length; + + // Count subfolders and recursively count their contents + count += node.subFolders.length; + for (const sub of node.subFolders) { + // Check if it's a placeholder ignored/truncated node + const isTruncatedPlaceholder = (sub.files.length === 1 && sub.files[0] === TRUNCATION_INDICATOR && sub.subFolders.length === 0); + + if (!isTruncatedPlaceholder) { + count += countReducedItems(sub); + } + // Don't add count for items *inside* the placeholder node itself. + } + return count; +} + + +/** + * Formats the reduced folder structure into a tree-like string. + * (No changes needed in this function) + * @param node The current node in the reduced structure. + * @param indent The current indentation string. + * @param isLast Sibling indicator. + * @param builder Array to build the string lines. + */ +function formatReducedStructure( + node: ReducedFolderNode, + indent: string, + isLast: boolean, + builder: string[] +): void { + const connector = isLast ? "└───" : "├───"; + const linePrefix = indent + connector; + + // Don't print the root node's name directly, only its contents + if (!node.isRoot) { + builder.push(`${linePrefix}${node.name}/`); + } + + const childIndent = indent + (isLast || node.isRoot ? " " : "│ "); // Use " " if last, "│" otherwise + + // Render files + const fileCount = node.files.length; + for (let i = 0; i < fileCount; i++) { + const isLastFile = i === fileCount - 1 && node.subFolders.length === 0; + const fileConnector = isLastFile ? "└───" : "├───"; + builder.push(`${childIndent}${fileConnector}${node.files[i]}`); + } + + // Render subfolders + const subFolderCount = node.subFolders.length; + for (let i = 0; i < subFolderCount; i++) { + const isLastSub = i === subFolderCount - 1; + formatReducedStructure(node.subFolders[i], childIndent, isLastSub, builder); + } +} + +// --- Main Exported Function --- + +/** + * Generates a string representation of a directory's structure, + * limiting the number of items displayed. Ignored folders are shown + * followed by '...' instead of their contents. + * + * @param directory The absolute or relative path to the directory. + * @param options Optional configuration settings. + * @returns A promise resolving to the formatted folder structure string. + */ +export async function getFolderStructure( + directory: string, + options?: FolderStructureOptions +): Promise<string> { + const resolvedPath = path.resolve(directory); + const mergedOptions: MergedFolderStructureOptions = { + maxItems: options?.maxItems ?? MAX_ITEMS, + ignoredFolders: options?.ignoredFolders ?? DEFAULT_IGNORED_FOLDERS, + fileIncludePattern: options?.fileIncludePattern, + }; + + try { + // 1. Read the full structure (includes ignored folders marked as such) + const fullInfo = await readFullStructure(resolvedPath, mergedOptions); + + if (!fullInfo) { + return `Error: Could not read directory "${resolvedPath}". Check path and permissions.`; + } + + // 2. Reduce the structure (handles ignored folders specifically) + const reducedRoot = reduceStructure(fullInfo, mergedOptions.maxItems, mergedOptions.ignoredFolders); + + // 3. Count items in the *reduced* structure for the summary + const rootNodeItselfCount = 0; // Don't count the root node in the items summary + const reducedItemCount = countReducedItems(reducedRoot) - rootNodeItselfCount; + + + // 4. Format the reduced structure into a string + const structureLines: string[] = []; + formatReducedStructure(reducedRoot, "", true, structureLines); + + // 5. Build the final output string + const displayPath = resolvedPath.replace(/\\/g, '/'); + const totalOriginalChildren = fullInfo.totalChildren; + + let disclaimer = ""; + // Check if any truncation happened OR if ignored folders were present + if (reducedItemCount < totalOriginalChildren || fullInfo.subFolders.some(sf => sf.isIgnored)) { + disclaimer = `Folders or files indicated with ${TRUNCATION_INDICATOR} contain more items not shown or were ignored.`; + } + + const summary = `Showing ${reducedItemCount} of ${totalOriginalChildren} items (files + folders). ${disclaimer}`.trim(); + + return `${summary}\n\n${displayPath}/\n${structureLines.join('\n')}`; + + } catch (error: any) { + console.error(`Error getting folder structure for ${resolvedPath}:`, error); + return `Error processing directory "${resolvedPath}": ${error.message}`; + } +} |
