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asipilot / packages /shared /src /utils.ts
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import { EXTENSION_MAP, EXCLUDED_DIRECTORIES, FRONTEND_EXTENSIONS } from './constants.js';
/**
* Estimate token count from text (~4 chars per token heuristic).
*/
export function estimateTokens(text: string): number {
return Math.ceil(text.length / 4);
}
/**
* Get language ID from file extension.
*/
export function getLanguageFromPath(filePath: string): string {
const ext = filePath.slice(filePath.lastIndexOf('.'));
return EXTENSION_MAP[ext] || 'plaintext';
}
/**
* Get file extension from path.
*/
export function getFileExtension(filePath: string): string {
const dotIndex = filePath.lastIndexOf('.');
return dotIndex >= 0 ? filePath.slice(dotIndex) : '';
}
/**
* Get file name from path.
*/
export function getFileName(filePath: string): string {
return filePath.split('/').pop() || filePath;
}
/**
* Check if a file path is frontend-relevant.
*/
export function isFrontendFile(filePath: string): boolean {
const ext = getFileExtension(filePath);
return FRONTEND_EXTENSIONS.has(ext);
}
/**
* Check if a directory should be excluded.
*/
export function isExcludedDirectory(dirName: string): boolean {
return EXCLUDED_DIRECTORIES.has(dirName);
}
/**
* Check if a file is likely binary.
*/
export function isBinaryFile(filePath: string): boolean {
const binaryExtensions = new Set([
'.png', '.jpg', '.jpeg', '.gif', '.bmp', '.ico', '.webp', '.avif',
'.mp4', '.webm', '.mov', '.avi',
'.mp3', '.wav', '.ogg', '.flac',
'.woff', '.woff2', '.ttf', '.otf', '.eot',
'.zip', '.tar', '.gz', '.rar', '.7z',
'.pdf', '.doc', '.docx', '.xls', '.xlsx',
'.exe', '.dll', '.so', '.dylib',
]);
return binaryExtensions.has(getFileExtension(filePath).toLowerCase());
}
/**
* Truncate text to a maximum number of lines.
*/
export function truncateLines(text: string, maxLines: number): string {
const lines = text.split('\n');
if (lines.length <= maxLines) return text;
return lines.slice(0, maxLines).join('\n') + '\n// ... [truncated]';
}
/**
* Generate a unique ID.
*/
export function generateId(): string {
return `${Date.now()}-${Math.random().toString(36).substring(2, 11)}`;
}