add file download for tracking page

src/app/components/document-viewer/DownloadButton.tsx

@@ -1,12 +1,49 @@
 'use client';
 
-import { usePdf } from '@/app/contexts/PdfContext';
+import { downloadTrackingFile } from '@/app/actions/trackingActions';
+import { useTranslations } from 'next-intl';
+import { toast } from 'sonner';
+interface DownloadButtonProps {
+	fileId: string;
+	fileName?: string;
+}
 
-export function DownloadButton() {
-	const { downloadPdf } = usePdf();
+export function DownloadButton({ fileId, fileName }: DownloadButtonProps) {
+	const t = useTranslations('Global');
+
+	const handleDownload = async () => {
+		try {
+			const result = await downloadTrackingFile(fileId, fileName);
+
+			if (!result) {
+				throw 'failed-to-download-file'
+			}
+
+			const byteCharacters = atob(result.data);
+			const byteNumbers = new Array(byteCharacters.length);
+			for (let i = 0; i < byteCharacters.length; i++) {
+				byteNumbers[i] = byteCharacters.charCodeAt(i)
+			}
+
+			const byteArray = new Uint8Array(byteNumbers);
+			const blob = new Blob([byteArray], { type: result.contentType });
+
+			const url = window.URL.createObjectURL(blob);
+			const a = document.createElement('a');
+			a.href = url;
+			a.download = result.fileName;
+			document.body.appendChild(a);
+			a.click();
+			window.URL.revokeObjectURL(url);
+			document.body.removeChild(a);
+			toast.success(`${t('file-is-downloading')} - `);
+		} catch (error) {
+			toast.error(t('failed-to-download-file'));
+		}
+	};
 
 	return (
-		<button className="btn btn-out" onClick={downloadPdf}>
+		<button className="btn btn-out" onClick={handleDownload}>
 			Скачать документ
 		</button>
 	);