refactor: enhance importExcelTags method to support both Excel and CSV formats; improve error handling for missing sheets

apps/box-mgnt-api/src/mgnt-backend/feature/video-media/video-media.service.ts

@@ -358,42 +358,72 @@ export class VideoMediaService {
     );
 
     const rowsAH: Array<{ idRaw: unknown; tagsRaw: unknown }> = [];
-    const csvText = buffer.toString('utf8');
-    const lines = csvText.split(/\r?\n/);
-    const parseCsvLine = (line: string): string[] => {
-      const cells: string[] = [];
-      let current = '';
-      let inQuotes = false;
-      for (let i = 0; i < line.length; i += 1) {
-        const ch = line[i];
-        if (ch === '"') {
-          if (inQuotes && line[i + 1] === '"') {
-            current += '"';
-            i += 1;
-          } else {
-            inQuotes = !inQuotes;
+    const filename = (file as any)?.filename ?? '';
+    const looksLikeXlsx =
+      buffer.length >= 4 &&
+      buffer[0] === 0x50 &&
+      buffer[1] === 0x4b &&
+      buffer[2] === 0x03 &&
+      buffer[3] === 0x04;
+
+    if (looksLikeXlsx || /\.xlsx$/i.test(filename)) {
+      const workbook = XLSX.read(buffer, { type: 'buffer' });
+      const sheetName = workbook.SheetNames[0];
+      const sheet = sheetName ? workbook.Sheets[sheetName] : undefined;
+
+      if (!sheet) {
+        throw new BadRequestException('No sheet found in Excel file');
+      }
+
+      const rangeRef = sheet['!ref'] ?? 'A1:A1';
+      const range = XLSX.utils.decode_range(rangeRef);
+
+      for (let r = range.s.r; r <= range.e.r; r += 1) {
+        const idCell = sheet[XLSX.utils.encode_cell({ r, c: 0 })];
+        const tagsCell = sheet[XLSX.utils.encode_cell({ r, c: 7 })];
+        rowsAH.push({
+          idRaw: idCell?.v ?? '',
+          tagsRaw: tagsCell?.v ?? '',
+        });
+      }
+    } else {
+      const csvText = buffer.toString('utf8');
+      const lines = csvText.split(/\r?\n/);
+      const parseCsvLine = (line: string): string[] => {
+        const cells: string[] = [];
+        let current = '';
+        let inQuotes = false;
+        for (let i = 0; i < line.length; i += 1) {
+          const ch = line[i];
+          if (ch === '"') {
+            if (inQuotes && line[i + 1] === '"') {
+              current += '"';
+              i += 1;
+            } else {
+              inQuotes = !inQuotes;
+            }
+            continue;
           }
-          continue;
-        }
-        if (ch === ',' && !inQuotes) {
-          cells.push(current);
-          current = '';
-          continue;
+          if (ch === ',' && !inQuotes) {
+            cells.push(current);
+            current = '';
+            continue;
+          }
+          current += ch;
         }
-        current += ch;
-      }
-      cells.push(current);
-      return cells;
-    };
+        cells.push(current);
+        return cells;
+      };
 
-    for (let i = 1; i < lines.length; i += 1) {
-      const line = lines[i];
-      if (!line) continue;
-      const cells = parseCsvLine(line);
-      rowsAH.push({
-        idRaw: cells[0] ?? '',
-        tagsRaw: cells[7] ?? '',
-      });
+      for (let i = 1; i < lines.length; i += 1) {
+        const line = lines[i];
+        if (!line) continue;
+        const cells = parseCsvLine(line);
+        rowsAH.push({
+          idRaw: cells[0] ?? '',
+          tagsRaw: cells[7] ?? '',
+        });
+      }
     }
 
     this.logger.log(