3 files changed, 115 insertions, 1 deletions
diff --git a/internal/client/input/b2.go b/internal/client/input/b2.go
index 54a6b09..0092313 100644
--- a/internal/client/input/b2.go
+++ b/internal/client/input/b2.go
@@ -21,7 +21,7 @@ type B2InputClient struct {
 	knownExtensions []string
 }
 
-func NewB2InputClient(cfg *config.InputConfig) (*B2InputClient, error) {
+func NewB2InputClient(cfg *config.InputConfig) (InputClient, error) {
 	if cfg.Storage.Type != "b2" {
 		return nil, fmt.Errorf("invalid storage type for B2InputClient")
 	}
diff --git a/internal/client/input/input_client_interface.go b/internal/client/input/input_client_interface.go
index c896ca4..5d12fa8 100644
--- a/internal/client/input/input_client_interface.go
+++ b/internal/client/input/input_client_interface.go
@@ -3,6 +3,8 @@ package input
 import (
 	"io"
 	"time"
+
+	"github.com/SayaAndy/saya-today-thumbnail-generator/config"
 )
 
 type InputClient interface {
@@ -20,3 +22,8 @@ type MetadataStruct struct {
 	LastModified time.Time
 	Misc         map[string]string
 }
+
+var NewInputClientMap = map[string]func(cfg *config.InputConfig) (InputClient, error){
+	"b2":         NewB2InputClient,
+	"local-unix": NewLocalUnixInputClient,
+}
diff --git a/internal/client/input/local_unix.go b/internal/client/input/local_unix.go
new file mode 100644
index 0000000..2df3a41
--- /dev/null
+++ b/internal/client/input/local_unix.go
@@ -0,0 +1,107 @@
+package input
+
+import (
+	"fmt"
+	"io"
+	"log/slog"
+	"mime"
+	"os"
+	"slices"
+	"strconv"
+	"strings"
+	"syscall"
+	"time"
+
+	"github.com/SayaAndy/saya-today-thumbnail-generator/config"
+)
+
+var _ InputClient = (*LocalUnixInputClient)(nil)
+
+type LocalUnixInputClient struct {
+	path            string
+	maxDepth        int
+	knownExtensions []string
+}
+
+func NewLocalUnixInputClient(cfg *config.InputConfig) (InputClient, error) {
+	if cfg.Storage.Type != "local-unix" {
+		return nil, fmt.Errorf("invalid storage type for LocalUnixInputClient")
+	}
+	localCfg := cfg.Storage.Config.(*config.InputLocalUnixConfig)
+
+	return &LocalUnixInputClient{
+		path:            localCfg.Path,
+		maxDepth:        localCfg.MaxDepth,
+		knownExtensions: cfg.KnownExtensions,
+	}, nil
+}
+
+func (c *LocalUnixInputClient) Scan() ([]string, error) {
+	return c.recursiveScan(c.path, c.maxDepth)
+}
+
+func (c *LocalUnixInputClient) recursiveScan(dir string, depth int) ([]string, error) {
+	filePaths := make([]string, 0)
+	entries, err := os.ReadDir(dir)
+	if err != nil {
+		return nil, fmt.Errorf("fail to read directory: %w", err)
+	}
+
+	for _, entry := range entries {
+		if entry.IsDir() && depth > 0 {
+			subFilePaths, err := c.recursiveScan(dir+entry.Name()+"/", depth-1)
+			if err != nil {
+				return nil, fmt.Errorf("fail to scan subdirectory '%s': %w", entry.Name(), err)
+			}
+			filePaths = append(filePaths, subFilePaths...)
+		} else if !entry.IsDir() {
+			nameParts := strings.Split(entry.Name(), ".")
+			if len(nameParts) < 2 {
+				continue
+			}
+			if slices.Contains(c.knownExtensions, strings.ToLower(nameParts[len(nameParts)-1])) {
+				filePaths = append(filePaths, strings.TrimPrefix(dir+entry.Name(), c.path))
+			}
+			fmt.Println(entry.Name())
+		}
+	}
+
+	return filePaths, nil
+}
+
+func (c *LocalUnixInputClient) ReadMetadata(path string) (*MetadataStruct, error) {
+	nodePathParts := strings.Split(path, "/")
+	nodeName := nodePathParts[len(nodePathParts)-1]
+	nodeNameParts := strings.Split(nodeName, ".")
+	nodeExt := ""
+	if len(nodeNameParts) >= 2 {
+		nodeExt = nodeNameParts[len(nodeNameParts)-1]
+	}
+	slog.Debug("got a file extension", slog.String("extension", nodeExt), slog.String("path", path), slog.String("filename", nodeName))
+
+	fileInfo, err := os.Stat(c.path + path)
+	if err != nil {
+		return nil, fmt.Errorf("fail to read file info: %w", err)
+	}
+
+	stat_t := fileInfo.Sys().(*syscall.Stat_t)
+	creationTime := time.Unix(stat_t.Ctim.Sec, stat_t.Ctim.Nsec)
+
+	misc := map[string]string{
+		"Size": strconv.FormatInt(fileInfo.Size(), 10),
+	}
+
+	return &MetadataStruct{
+		Name:         fileInfo.Name(),
+		StorageType:  "local-unix",
+		Hash:         strconv.FormatInt(fileInfo.ModTime().Unix(), 16),
+		ContentType:  mime.TypeByExtension("." + nodeExt),
+		FirstCreated: creationTime,
+		LastModified: fileInfo.ModTime(),
+		Misc:         misc,
+	}, nil
+}
+
+func (c *LocalUnixInputClient) GetReader(path string) (io.ReadCloser, error) {
+	return os.Open(c.path + path)
+}