feat: images

internal/filesystem/model.go

@@ -0,0 +1,106 @@
+package filesystem
+
+import (
+	"encoding/json"
+	"os"
+	"time"
+)
+
+type FS interface {
+	ReadDir(path string) ([]os.FileInfo, error)
+	Read(path string) ([]byte, error)
+	Stat(path string) (os.FileInfo, error)
+}
+
+type FileInfo interface {
+	os.FileInfo
+	ContentType() string
+	Path() string
+}
+
+// File implements FileInfo
+type File struct {
+	name        string
+	size        int64
+	mode        os.FileMode
+	modTime     time.Time
+	isDir       bool
+	contentType string
+	path        string
+}
+
+func (f File) Name() string        { return f.name }
+func (f File) Size() int64         { return f.size }
+func (f File) Mode() os.FileMode   { return f.mode }
+func (f File) ModTime() time.Time  { return f.modTime }
+func (f File) IsDir() bool         { return f.isDir }
+func (f File) Sys() any            { return nil }
+func (f File) ContentType() string { return f.contentType }
+func (f File) Path() string        { return f.path }
+
+type serializableFile struct {
+	Name        string      `json:"name"`
+	Size        int64       `json:"size"`
+	Mode        os.FileMode `json:"mode"`
+	ModTime     time.Time   `json:"modTime"`
+	IsDir       bool        `json:"isDir"`
+	ContentType string      `json:"contentType"`
+	Path        string      `json:"path"`
+}
+
+// MarshalJSON implements json.Marshaler
+func (f File) MarshalJSON() ([]byte, error) {
+	// Create a local shadow struct with exported fields for the JSON package
+	return json.Marshal(serializableFile{
+		Name:        f.name,
+		Size:        f.size,
+		Mode:        f.mode,
+		ModTime:     f.modTime,
+		IsDir:       f.isDir,
+		ContentType: f.contentType,
+		Path:        f.path,
+	})
+}
+
+// UnmarshalJSON implements json.Unmarshaler
+func (f *File) UnmarshalJSON(data []byte) error {
+	// Define a shadow struct to capture the incoming JSON
+	shadow := serializableFile{}
+
+	if err := json.Unmarshal(data, &shadow); err != nil {
+		return err
+	}
+
+	// Transfer values to the actual struct
+	f.name = shadow.Name
+	f.size = shadow.Size
+	f.mode = shadow.Mode
+	f.modTime = shadow.ModTime
+	f.isDir = shadow.IsDir
+	f.contentType = shadow.ContentType
+	f.path = shadow.Path
+	return nil
+}
+
+func ParseToFile(file os.FileInfo) File {
+	if fi, ok := file.(FileInfo); ok {
+		return File{
+			name:        fi.Name(),
+			size:        fi.Size(),
+			mode:        fi.Mode(),
+			modTime:     fi.ModTime(),
+			isDir:       fi.IsDir(),
+			contentType: fi.ContentType(),
+			path:        fi.Path(),
+		}
+	} else {
+		// Fallback if underlying impl returns generic os.FileInfo
+		return File{
+			name:    file.Name(),
+			size:    file.Size(),
+			mode:    file.Mode(),
+			modTime: file.ModTime(),
+			isDir:   file.IsDir(),
+		}
+	}
+}