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b6ecafa | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | const RTL_CHAR_REGEX =
/\p{Script=Hebrew}|\p{Script=Arabic}|\p{Script=Syriac}|\p{Script=Thaana}/u
export function detectTextDirection(text: string | null): 'rtl' | 'ltr' {
if (!text) return 'ltr'
const skipPattern = /[\s\p{P}\p{S}]/u
for (const char of text) {
if (skipPattern.test(char)) continue
return RTL_CHAR_REGEX.test(char) ? 'rtl' : 'ltr'
}
return 'ltr'
}
export function validateAttachment(file: { name: string; size: number; type: string }): string | null {
if (file.size > 10 * 1024 * 1024) return `File "${file.name}" exceeds 10MB limit`
return null
}
export function formatFileSize(bytes: number): string {
if (bytes < 1024) return `${bytes} B`
if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(1)} KB`
return `${(bytes / (1024 * 1024)).toFixed(1)} MB`
}
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