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path: root/apps/web/src/lib/utils.ts
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// Generic utilities

import { type ClassValue, clsx } from "clsx";
import { twMerge } from "tailwind-merge";

export function cn(...inputs: ClassValue[]) {
	return twMerge(clsx(inputs));
}

/**
 * Generates a UUID v4 string
 * Uses crypto.randomUUID() if available, otherwise falls back to a custom implementation
 */
export function generateUUID(): string {
	// Use the native crypto.randomUUID if available
	if (
		typeof crypto !== "undefined" &&
		typeof crypto.randomUUID === "function"
	) {
		return crypto.randomUUID();
	}

	// Secure fallback using crypto.getRandomValues
	const bytes = new Uint8Array(16);
	crypto.getRandomValues(bytes);

	// Set version 4 (UUIDv4)
	bytes[6] = (bytes[6] & 0x0f) | 0x40;
	// Set variant 10xxxxxx
	bytes[8] = (bytes[8] & 0x3f) | 0x80;

	const hex = [...bytes].map((b) => b.toString(16).padStart(2, "0"));

	return (
		hex.slice(0, 4).join("") +
		"-" +
		hex.slice(4, 6).join("") +
		"-" +
		hex.slice(6, 8).join("") +
		"-" +
		hex.slice(8, 10).join("") +
		"-" +
		hex.slice(10, 16).join("")
	);
}

export function isDOMElement(el: any): el is HTMLElement {
	return !!el && (el instanceof Element || el instanceof HTMLElement);
}

export function isTypableElement(el: HTMLElement): boolean {
	// If content editable, then it is editable
	if (el.isContentEditable) return true;

	// If element is an input and the input is enabled, then it is typable
	if (el.tagName === "INPUT") {
		return !(el as HTMLInputElement).disabled;
	}
	// If element is a textarea and the input is enabled, then it is typable
	if (el.tagName === "TEXTAREA") {
		return !(el as HTMLTextAreaElement).disabled;
	}

	return false;
}
export function isAppleDevice() {
	return /(Mac|iPhone|iPod|iPad)/i.test(navigator.platform);
}

export function getPlatformSpecialKey() {
	return isAppleDevice() ? "⌘" : "Ctrl";
}

export function getPlatformAlternateKey() {
	return isAppleDevice() ? "⌥" : "Alt";
}