From 8a973ee7a7d3b7aea0dc9d743f660e1aa5bd10c4 Mon Sep 17 00:00:00 2001
From: Renato Rosa <renatoxsr@gmail.com>
Date: Wed, 19 Aug 2026 21:44:38 -0300
Subject: [PATCH] Adicionar app/services/io_excel.py

---
 app/services/io_excel.py | 57 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 app/services/io_excel.py

diff --git a/app/services/io_excel.py b/app/services/io_excel.py
new file mode 100644
index 0000000..9354a32
--- /dev/null
+++ b/app/services/io_excel.py
@@ -0,0 +1,57 @@
+# All comments are in English.
+
+import openpyxl
+import xlrd
+from odf.opendocument import load
+from odf.table import Table, TableRow, TableCell
+from odf.text import P
+
+def normalize_newlines(value):
+    if value is None:
+        return ""
+    return (
+        str(value)
+        .replace("\r\n", "\\n")
+        .replace("\n\r", "\\n")
+        .replace("\r", "\\n")
+        .replace("\n", "\\n")
+    )
+
+def convert_xlsx(path):
+    wb = openpyxl.load_workbook(path, data_only=True)
+    ws = wb.active
+    rows = []
+    for row in ws.iter_rows(values_only=True):
+        cleaned = [normalize_newlines(cell) for cell in row]
+        rows.append("\x09".join(cleaned))
+    return "\n".join(rows)
+
+def convert_xls(path):
+    wb = xlrd.open_workbook(path)
+    sheet = wb.sheet_by_index(0)
+    rows = []
+    for r in range(sheet.nrows):
+        cleaned = [normalize_newlines(sheet.cell_value(r, c)) for c in range(sheet.ncols)]
+        rows.append("\x09".join(cleaned))
+    return "\n".join(rows)
+
+def convert_ods(path):
+    doc = load(path)
+    rows = []
+    for table in doc.getElementsByType(Table):
+        for row in table.getElementsByType(TableRow):
+            cells = []
+            for cell in row.getElementsByType(TableCell):
+                text = "".join(t.data for t in cell.getElementsByType(P))
+                cells.append(normalize_newlines(text))
+            rows.append("\x09".join(cells))
+    return "\n".join(rows)
+
+def convert_excel(path):
+    if path.endswith(".xlsx"):
+        return convert_xlsx(path)
+    if path.endswith(".xls"):
+        return convert_xls(path)
+    if path.endswith(".ods"):
+        return convert_ods(path)
+    raise ValueError("Unsupported Excel format")