Merge pull request #35 from HazelnutParadise/csvxl

Add `EachCsvToOneExcel` and `EachExcelToCsv` to `csvxl` package.

Docs/csvxl.md

@@ -125,6 +125,32 @@ func ExcelToCsv(excelFile string, outputDir string, csvNames []string, onlyConta
 - `csvNames`: Custom CSV file names. If not provided, the sheet name will be used as the default CSV file name.
 - `onlyContainSheets`(optional): Only convert the specified sheets. If not provided, all sheets will be converted.
 
+> [!NOTE]
+> The CSV file names will be in the format of "ExcelFileName_SheetName.csv".
+
+### 4. `EachExcelToCsv`
+
+```go
+func EachExcelToCsv(dir string, outputDir string)
+```
+
+**Description**: Splits each sheet in each Excel file in the given directory into individual CSV files.
+
+- `dir`: The directory containing the input Excel files.
+- `outputDir`: The directory where the split CSV files will be saved.
+
+### 5. `EachCsvToOneExcel`
+
+```go
+func EachCsvToOneExcel(dir string, output string, encoding ...string)
+```
+
+**Description**: Converts each CSV file in the given directory to an Excel file.
+
+- `dir`: The directory containing the input CSV files.
+- `output`: The name of the output Excel file.
+- `encoding`(optional): The encoding of the CSV files. If not provided, `UTF-8` encoding is used.
+
 ## Encoding Support
 
 > [!NOTE]

csvxl/convertDir.go

@@ -0,0 +1,75 @@
+package csvxl
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/HazelnutParadise/insyra"
+	"github.com/xuri/excelize/v2"
+)
+
+// EachCsvToOneExcel converts each CSV file in the given directory to an Excel file.
+// The output Excel file will be saved in the given output path.
+func EachCsvToOneExcel(dir string, output string, encoding ...string) {
+	files, err := filepath.Glob(filepath.Join(dir, "*.csv"))
+	if err != nil {
+		insyra.LogWarning("csvxl.EachCsvToOneExcel: %s", err)
+		return
+	}
+
+	var csvFiles []string
+	csvFiles = append(csvFiles, files...)
+
+	CsvToExcel(csvFiles, nil, output, encoding...)
+}
+
+// EachExcelToCsv converts each Excel file in the given directory to CSV files.
+// The output CSV files will be saved in the given output directory.
+// The CSV files will be named as the Excel file name plus the sheet name plus ".csv",
+// for example, "ExcelFileName_SheetName.csv".
+func EachExcelToCsv(dir string, outputDir string) {
+	files, err := filepath.Glob(filepath.Join(dir, "*.xlsx"))
+	if err != nil {
+		insyra.LogWarning("csvxl.EachExcelToCsv: %s", err)
+		return
+	}
+
+	xlsx2Csv := func(excelFile string, outputDir string) {
+		f, err := excelize.OpenFile(excelFile)
+		if err != nil {
+			insyra.LogWarning("csvxl.ExcelToCsv: Failed to open Excel file %s: %v", excelFile, err)
+			return
+		}
+
+		excelFileName := filepath.Base(excelFile)
+		excelFileName = strings.TrimSuffix(excelFileName, ".xlsx")
+
+		sheets := f.GetSheetList()
+		for _, sheet := range sheets {
+
+			csvName := excelFileName + "_" + sheet + ".csv"
+
+			// Check if output directory exists, if not create it
+			if _, err := os.Stat(outputDir); os.IsNotExist(err) {
+				err := os.MkdirAll(outputDir, os.ModePerm)
+				if err != nil {
+					insyra.LogWarning("csvxl.ExcelToCsv: Failed to create directory %s: %v", outputDir, err)
+					return
+				}
+			}
+			outputCsv := filepath.Join(outputDir, csvName)
+			err := saveSheetAsCsv(f, sheet, outputCsv)
+			if err != nil {
+				insyra.LogWarning("csvxl.ExcelToCsv: Failed to save sheet %s as CSV: %v", sheet, err)
+				return
+			}
+		}
+
+		insyra.LogInfo("csvxl.ExcelToCsv: Successfully converted %d sheets to CSV files in %s.", len(sheets), outputDir)
+	}
+
+	for _, file := range files {
+		xlsx2Csv(file, outputDir)
+	}
+}