import { ServiceError, ErrorCode } from '../types';
export class Validation {
static validateYouTubeUrl(url: string): string {
if (!url || typeof url !== 'string') {
throw new ServiceError(
ErrorCode.INVALID_URL,
'URL is required and must be a string',
false
);
}
const trimmedUrl = url.trim();
// Basic URL validation
try {
const urlObj = new URL(trimmedUrl);
if (!urlObj.protocol.startsWith('http')) {
throw new ServiceError(
ErrorCode.INVALID_URL,
'URL must use HTTP or HTTPS protocol',
false
);
}
} catch (error) {
throw new ServiceError(
ErrorCode.INVALID_URL,
'Invalid URL format',
false
);
}
// YouTube URL validation
const youtubePatterns = [
/^https?:\/\/(www\.)?youtube\.com\/watch\?v=[\w-]+/,
/^https?:\/\/youtu\.be\/[\w-]+/,
/^https?:\/\/(www\.)?youtube\.com\/embed\/[\w-]+/,
/^https?:\/\/(www\.)?youtube\.com\/v\/[\w-]+/
];
const isValidYouTubeUrl = youtubePatterns.some(pattern => pattern.test(trimmedUrl));
if (!isValidYouTubeUrl) {
throw new ServiceError(
ErrorCode.INVALID_URL,
'URL must be a valid YouTube video URL',
false
);
}
return trimmedUrl;
}
static validateMaxTracks(maxTracks?: number): number | undefined {
if (maxTracks === undefined || maxTracks === null) {
return undefined;
}
if (typeof maxTracks !== 'number' || maxTracks <= 0) {
throw new ServiceError(
ErrorCode.INVALID_URL,
'maxTracks must be a positive number',
false
);
}
// Reasonable upper limit to prevent abuse
if (maxTracks > 100) {
throw new ServiceError(
ErrorCode.INVALID_URL,
'maxTracks cannot exceed 100',
false
);
}
return Math.floor(maxTracks);
}
static validateCustomOutputPath(path?: string): string | undefined {
if (!path) {
return undefined;
}
if (typeof path !== 'string') {
throw new ServiceError(
ErrorCode.INVALID_URL,
'customOutputPath must be a string',
false
);
}
const trimmedPath = path.trim();
// Basic path validation (no absolute paths, no parent directory traversal)
if (trimmedPath.startsWith('/') || trimmedPath.includes('..')) {
throw new ServiceError(
ErrorCode.INVALID_URL,
'customOutputPath cannot be absolute or contain parent directory traversal',
false
);
}
return trimmedPath;
}
static sanitizeString(input: string, maxLength: number = 1000): string {
if (typeof input !== 'string') {
return '';
}
return input
.trim()
.substring(0, maxLength)
.replace(/[\x00-\x1f\x7f]/g, ''); // Remove control characters
}
}
