init: initial commit

internal/parser/excel_parser.go

@@ -0,0 +1,62 @@
+package parser
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/xuri/excelize/v2"
+)
+
+// ExcelParser extracts all sheets from Excel files as Markdown tables.
+type ExcelParser struct{}
+
+func (p *ExcelParser) SupportedExtensions() []string {
+	return []string{".xlsx", ".xls"}
+}
+
+func (p *ExcelParser) ParseToMarkdown(path string) (string, error) {
+	f, err := excelize.OpenFile(path)
+	if err != nil {
+		return "", fmt.Errorf("open excel: %w", err)
+	}
+	defer f.Close()
+
+	var sb strings.Builder
+	for _, sheet := range f.GetSheetList() {
+		rows, err := f.GetRows(sheet)
+		if err != nil {
+			continue
+		}
+		if len(rows) == 0 {
+			continue
+		}
+
+		sb.WriteString(fmt.Sprintf("## Sheet: %s\n\n", sheet))
+
+		// Header row
+		sb.WriteString("| ")
+		for _, cell := range rows[0] {
+			sb.WriteString(cell + " | ")
+		}
+		sb.WriteString("\n|")
+		for range rows[0] {
+			sb.WriteString(" --- |")
+		}
+		sb.WriteString("\n")
+
+		// Data rows
+		for _, row := range rows[1:] {
+			sb.WriteString("| ")
+			for i := 0; i < len(rows[0]); i++ {
+				if i < len(row) {
+					sb.WriteString(row[i])
+				}
+				sb.WriteString(" | ")
+			}
+			sb.WriteString("\n")
+		}
+		sb.WriteString("\n")
+	}
+
+	return sb.String(), nil
+}