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import { generateSlug as sharedGenerateSlug } from "@interioring/utils/format/slug";
// Utility functions
/**
* Generate a UUID v4
*/
export function generateId(): string {
return crypto.randomUUID();
}
/**
* Ensure user is present (for use in authenticated routes)
* Throws UnauthorizedError if user is null
*/
export function requireUser<T extends { id: string }>(
user: T | null | undefined,
): T {
if (!user) {
throw new UnauthorizedError("User session not found");
}
return user;
}
/**
* Generate a URL-safe slug from a string. Delegates to the shared package
* so portal + api stay in sync. Prefer importing directly from
* `@interioring/utils/format/slug` in new code.
*/
export const generateSlug = sharedGenerateSlug;
/**
* Generate a cryptographically random base36 suffix of the given length.
* Uses Web Crypto (available in Cloudflare Workers, no import needed) instead
* of Math.random() to avoid predictable / collision-prone outputs.
*/
export function randomBase36Suffix(length: number): string {
const bytes = new Uint8Array(length);
crypto.getRandomValues(bytes);
let out = "";
for (let i = 0; i < length; i++) {
// Map byte (0-255) to base36 char (0-9a-z). 36 does not divide 256 evenly,
// so there is a tiny modulo bias, but it's acceptable for non-secret IDs.
out += (bytes[i] % 36).toString(36);
}
return out;
}
/**
* Generate a unique slug by appending a crypto-random base36 suffix.
* Suffix widened from 4 to 6 chars for collision resistance at scale.
*/
export function generateUniqueSlug(text: string): string {
const baseSlug = generateSlug(text);
const suffix = randomBase36Suffix(6);
return `${baseSlug}-${suffix}`;
}
/**
* Pick specific fields from an object
*/
export function pick<T extends object, K extends keyof T>(
obj: T,
keys: K[],
): Pick<T, K> {
const result = {} as Pick<T, K>;
for (const key of keys) {
if (key in obj) {
result[key] = obj[key];
}
}
return result;
}
/**
* Omit specific fields from an object
*/
export function omit<T extends object, K extends keyof T>(
obj: T,
keys: K[],
): Omit<T, K> {
const result = { ...obj };
for (const key of keys) {
delete result[key];
}
return result as Omit<T, K>;
}
/**
* Check if a value is defined (not null or undefined)
*/
export function isDefined<T>(value: T | null | undefined): value is T {
return value !== null && value !== undefined;
}
/**
* Pagination helper
*/
export function getPagination(page = 1, limit = 20) {
const safePage = Math.max(1, page);
const safeLimit = Math.min(100, Math.max(1, limit));
const offset = (safePage - 1) * safeLimit;
return { offset, limit: safeLimit, page: safePage };
}
/**
* Build pagination metadata
*/
export function buildPaginationMeta(
total: number,
page: number,
limit: number,
) {
const totalPages = Math.ceil(total / limit);
return {
total,
page,
limit,
totalPages,
hasNext: page < totalPages,
hasPrev: page > 1,
};
}
/**
* Parse and validate integer ID from string
* Returns the parsed number or null if invalid
*/
export function parseIntId(value: string | undefined): number | null {
if (!value) return null;
const parsed = parseInt(value, 10);
if (Number.isNaN(parsed) || parsed < 1) return null;
return parsed;
}
/**
* Parse and validate a required integer ID from a route param.
* Throws ValidationError if missing or invalid — eliminates the
* repetitive parseIntId + null-check + throw pattern in route handlers.
*/
export function parseRequiredId(
value: string | undefined,
resource: string,
): number {
const id = parseIntId(value);
if (!id) throw new ValidationError(`Invalid ${resource} ID`);
return id;
}
/**
* Validate UUID format
*/
export function isValidUuid(value: string | undefined): boolean {
if (!value) return false;
const uuidRegex =
/^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;
return uuidRegex.test(value);
}
/**
* Build a safe LIKE pattern for searching a UUID within a JSON array string.
* This function validates the UUID format and escapes any LIKE special characters.
* Returns null if the value is not a valid UUID.
*
* @example
* // For searching if "abc-123" is in a JSON array like '["abc-123","def-456"]'
* buildJsonArrayLikePattern("abc-123") // returns '%"abc-123"%'
*/
export function buildJsonArrayLikePattern(
value: string | undefined,
): string | null {
if (!value || !isValidUuid(value)) {
return null;
}
// UUID only contains hex chars and hyphens, so no LIKE escaping needed,
// but we escape % and _ just in case for defense in depth
const escaped = value.replace(/%/g, "\\%").replace(/_/g, "\\_");
return `%"${escaped}"%`;
}
/**
* Build a safe LIKE pattern for searching any valid identifier within a JSON array string.
* Accepts UUIDs and simple identifiers (alphanumeric with underscores/hyphens).
* Returns null if the value is empty or contains dangerous characters.
*
* @example
* buildJsonArrayLikePatternSafe("full_home") // returns '%"full_home"%'
* buildJsonArrayLikePatternSafe("abc-123-def") // returns '%"abc-123-def"%'
*/
export function buildJsonArrayLikePatternSafe(
value: string | undefined,
): string | null {
if (!value) {
return null;
}
// Allow alphanumeric, underscores, and hyphens only
const safeIdRegex = /^[a-zA-Z0-9_-]+$/;
if (!safeIdRegex.test(value)) {
return null;
}
// Escape LIKE special characters for safety
const escaped = value.replace(/%/g, "\\%").replace(/_/g, "\\_");
return `%"${escaped}"%`;
}
/**
* Check if value is in allowed enum array
*/
export function isValidEnum<T extends readonly string[]>(
value: string | undefined,
allowedValues: T,
): value is T[number] {
if (!value) return false;
return allowedValues.includes(value as T[number]);
}
/**
* Sanitize search input for SQL LIKE queries
* Escapes special characters: %, _, \
* This prevents users from crafting malicious search patterns
*/
export function sanitizeSearchInput(search: string): string {
return search
.trim()
.replace(/\\/g, "\\\\") // Escape backslashes first
.replace(/%/g, "\\%") // Escape percent signs for LIKE queries
.replace(/_/g, "\\_") // Escape underscores for LIKE queries
.substring(0, 200); // Limit length to prevent DoS
}
/**
* Validate an array contains only allowed enum values
*/
export function isValidEnumArray<T extends readonly string[]>(
values: unknown,
allowedValues: T,
): values is T[number][] {
if (!Array.isArray(values)) return false;
return values.every(
(v) => typeof v === "string" && allowedValues.includes(v as T[number]),
);
}
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