/**
* Text direction and language utilities for RTL support
*/
/**
* Detect if text is primarily in Arabic script
*/
export function isArabicText(text: string): boolean {
if (!text) return false;
// Arabic Unicode ranges: \u0600-\u06FF (Arabic), \u0750-\u077F (Arabic Supplement)
const arabicPattern = /[\u0600-\u06FF\u0750-\u077F]/;
const arabicChars = text.match(/[\u0600-\u06FF\u0750-\u077F]/g);
if (!arabicChars) return false;
// If more than 30% of characters are Arabic, consider it Arabic text
const totalChars = text.replace(/\s/g, '').length;
return (arabicChars.length / totalChars) > 0.3;
}
/**
* Detect if text is in RTL language (Arabic, Hebrew, Persian, Urdu)
*/
export function isRTLText(text: string): boolean {
if (!text) return false;
// RTL Unicode ranges
const rtlPattern = /[\u0590-\u05FF\u0600-\u06FF\u0750-\u077F\u08A0-\u08FF\uFB50-\uFDFF\uFE70-\uFEFF]/;
return rtlPattern.test(text);
}
/**
* Get text direction for proper display
*/
export function getTextDirection(text: string): 'rtl' | 'ltr' {
return isRTLText(text) ? 'rtl' : 'ltr';
}
/**
* Format text with direction indicator for display
*/
export function formatTextWithDirection(text: string): string {
const direction = getTextDirection(text);
if (direction === 'rtl') {
// Add RTL mark and directional formatting
return `\u200F${text}\u200F`; // RIGHT-TO-LEFT MARK
}
return text;
}
/**
* Detect language from text
*/
export function detectLanguage(text: string): string {
if (!text) return 'unknown';
// Arabic
if (/[\u0600-\u06FF]/.test(text)) return 'ar';
// Hebrew
if (/[\u0590-\u05FF]/.test(text)) return 'he';
// Persian/Farsi (uses Arabic script with additions)
if (/[\u06A9\u06AF\u067E\u0686]/.test(text)) return 'fa';
// Urdu (uses Arabic script with additions)
if (/[\u0679\u0688\u0691\u0698]/.test(text)) return 'ur';
// Turkish
if (/[ğĞıİöÖüÜşŞçÇ]/.test(text)) return 'tr';
// Default to English
return 'en';
}
/**
* Format article output with proper RTL support
*/
export interface FormattedArticle {
id: string;
title: string;
title_direction: 'rtl' | 'ltr';
link: string;
pub_date: string;
summary: string;
summary_direction: 'rtl' | 'ltr';
author: string | null;
categories: string[];
language: string;
}
export function formatArticleWithRTL(article: {
id: string;
title: string;
link: string;
pub_date: string;
summary: string;
author: string | null;
categories: string[];
}): FormattedArticle {
return {
id: article.id,
title: formatTextWithDirection(article.title),
title_direction: getTextDirection(article.title),
link: article.link,
pub_date: article.pub_date,
summary: formatTextWithDirection(article.summary),
summary_direction: getTextDirection(article.summary),
author: article.author,
categories: article.categories,
language: detectLanguage(article.title + ' ' + article.summary)
};
}
