Initial commit - Route Commerce platform

src/lib/excel-parser.ts

@@ -0,0 +1,81 @@
+import ExcelJS from "exceljs";
+
+export type ParsedSheet = {
+  headers: string[];
+  rows: string[][];
+};
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export async function parseExcelBuffer(input: any): Promise<{
+  headers: string[];
+  rows: string[][];
+}> {
+  const workbook = new ExcelJS.Workbook();
+  await workbook.xlsx.load(input);
+
+  const sheet = workbook.getWorksheet(1);
+  if (!sheet) {
+    return { headers: [], rows: [] };
+  }
+
+  const headers: string[] = [];
+  const rows: string[][] = [];
+
+  sheet.eachRow((row, rowIndex) => {
+    const values = row.values as (string | number | Date | null | undefined)[];
+    const rowData = values.map((v) => {
+      if (v === null || v === undefined) return "";
+      if (v instanceof Date) return v.toISOString().split("T")[0];
+      return String(v).trim();
+    });
+
+    if (rowIndex === 1) {
+      // Header row
+      headers.push(...rowData);
+    } else {
+      // Skip empty rows
+      if (rowData.some((v) => v !== "")) {
+        rows.push(rowData);
+      }
+    }
+  });
+
+  return { headers, rows };
+}
+
+/**
+ * Parse CSV/TSV/TXT text into headers + rows.
+ * Auto-detects delimiter by checking first few lines.
+ */
+export function parseTextBuffer(rawText: string): ParsedSheet {
+  // Normalize line endings
+  const text = rawText.replace(/\r\n/g, "\n").replace(/\r/g, "").trim();
+  const lines = text.split("\n").filter((l) => l.trim() !== "");
+
+  if (lines.length === 0) return { headers: [], rows: [] };
+
+  // Detect delimiter
+  const firstLine = lines[0];
+  const delimiter = detectDelimiter(firstLine);
+
+  const headers = firstLine.split(delimiter).map((h) => h.trim().replace(/^["']|["']$/g, ""));
+  const rows = lines.slice(1).map((line) =>
+    line.split(delimiter).map((v) => v.trim().replace(/^["']|["']$/g, ""))
+  );
+
+  return { headers, rows };
+}
+
+function detectDelimiter(line: string): string {
+  const delimiters = [",", "\t", ";", "|"];
+  let best = ",";
+  let maxCount = 0;
+  for (const d of delimiters) {
+    const count = (line.match(new RegExp(`\\${d}`, "g")) ?? []).length;
+    if (count > maxCount) {
+      maxCount = count;
+      best = d;
+    }
+  }
+  return best;
+}