feature: added sub file finders

pkg/io/files/subfile_finder.go

@@ -0,0 +1,64 @@
+package files
+
+import (
+	"fmt"
+	"io/fs"
+	"os"
+	"path/filepath"
+
+	"git.tswf.io/incredible-go/incredible-go-core/pkg/collections/array_list"
+)
+
+type FileFilter func(fileInfo os.FileInfo, fileName string) bool
+
+func ListFiles(dirPath string) (*array_list.ArrayList[os.FileInfo], error) {
+	dirInfo, err := os.Stat(dirPath)
+
+	if err != nil {
+		return nil, err
+	}
+
+	if !dirInfo.IsDir() {
+		return nil, fmt.Errorf("'%s' is not directory", dirPath)
+	}
+
+	dirEntries, err := os.ReadDir(dirPath)
+
+	if err != nil {
+		return nil, err
+	}
+
+	result := array_list.NewArrayList[os.FileInfo]()
+
+	if len(dirEntries) > 0 {
+		for _, dirEntry := range dirEntries {
+			dirEntryFileInfo, err := dirEntry.Info()
+
+			if err != nil {
+				return nil, err
+			}
+
+			result.Add(dirEntryFileInfo)
+		}
+	}
+
+	return result, nil
+}
+
+func FindSubfilesByFilter(rootPath string, filter FileFilter) (*array_list.ArrayList[os.FileInfo], error) {
+	result := array_list.NewArrayList[os.FileInfo]()
+
+	err := filepath.Walk(rootPath, func(path string, info fs.FileInfo, err error) error {
+		if err != nil && filter(info, path) {
+			result.Add(info)
+		}
+
+		return nil
+	})
+
+	if err != nil {
+		return nil, err
+	}
+
+	return result, nil
+}