added md5 sums to the local file upload indexing

internal/app/app.go

@@ -44,7 +44,7 @@ func Run() {
 		logErrorAndExit(err, 5)
 	}
 
-	err = synchronizeImages(filesystemNodes, categories)
+	err = synchronizeImages(context, filesystemNodes, categories)
 	if err != nil {
 		logErrorAndExit(err, 6)
 	}

internal/app/images.go

@@ -9,7 +9,10 @@ import (
 
 func synchronizeImages(context *AppContext, fileSystem map[string]*localFileStructure.FilesystemNode, existingCategories map[string]*category.PiwigoCategory) error {
 
-	imageFiles := getImageList(fileSystem)
+	imageFiles, err := localFileStructure.GetImageList(fileSystem)
+	if err != nil {
+		return err
+	}
 
 	missingFiles := findMissingImages(imageFiles)
 	uploadImages(missingFiles)
@@ -17,7 +20,7 @@ func synchronizeImages(context *AppContext, fileSystem map[string]*localFileStru
 	return errors.New("synchronizeImages: NOT IMPLEMENTED")
 }
 
-func findMissingImages(imageFiles []string) []string {
+func findMissingImages(imageFiles []*localFileStructure.ImageNode) []string {
 
 	logrus.Warnln("Finding missing images (NotImplemented)")
 
@@ -27,15 +30,3 @@ func findMissingImages(imageFiles []string) []string {
 func uploadImages(missingFiles []string) {
 	logrus.Warnln("Uploading missing images (NotImplemented)")
 }
-
-func getImageList(fileSystem map[string]*localFileStructure.FilesystemNode) []string {
-	imageFiles := []string{}
-
-	for _, file := range fileSystem {
-		if !file.IsDir {
-			imageFiles = append(imageFiles, file.Key)
-		}
-	}
-
-	return imageFiles
-}

internal/pkg/localFileStructure/checksumCalculator.go

@@ -0,0 +1,30 @@
+package localFileStructure
+
+import (
+	"crypto/md5"
+	"fmt"
+	"github.com/sirupsen/logrus"
+	"io"
+	"os"
+)
+
+func calculateFileCheckSums(filePath string) (string, error) {
+	f, err := os.Open(filePath)
+	if err != nil {
+		logrus.Errorf("Could not open file %s", filePath)
+		return "", err
+	}
+	defer f.Close()
+
+	h := md5.New()
+	if _, err := io.Copy(h, f); err != nil {
+		logrus.Errorf("Could calculate md5 sum of file %s", filePath)
+		return "", err
+	}
+
+	md5sum := fmt.Sprintf("%x", md5.Sum(nil))
+
+	logrus.Tracef("Calculated md5 sum of %s - %s", filePath, md5sum)
+
+	return md5sum, nil
+}

internal/pkg/localFileStructure/filesystemScanner.go

@@ -21,19 +21,21 @@ func ScanLocalFileStructure(path string) (map[string]*FilesystemNode, error) {
 	numberOfDirectories := 0
 	numberOfImages := 0
 
-	err = filepath.Walk(fullPathRoot, func(p string, info os.FileInfo, err error) error {
-		if fullPathRoot == p {
+	err = filepath.Walk(fullPathRoot, func(path string, info os.FileInfo, err error) error {
+		if fullPathRoot == path {
 			return nil
 		}
 
 		//TODO: Only allow jpg and png files here
 
-		key := strings.Replace(p, fullPathReplace, "", 1)
+		key := strings.Replace(path, fullPathReplace, "", 1)
 
-		fileMap[p] = &FilesystemNode{
+		fileMap[path] = &FilesystemNode{
 			Key:     key,
+			Path:    path,
 			Name:    info.Name(),
 			IsDir:   info.IsDir(),
+			ModTime: info.ModTime(),
 		}
 
 		if info.IsDir() {

internal/pkg/localFileStructure/imageList.go

@@ -0,0 +1,31 @@
+package localFileStructure
+
+import (
+	"github.com/sirupsen/logrus"
+	"time"
+)
+
+func GetImageList(fileSystem map[string]*FilesystemNode) ([]*ImageNode, error) {
+	imageFiles := []*ImageNode{}
+
+	for _, file := range fileSystem {
+		if file.IsDir {
+			continue
+		}
+
+		md5sum, err := calculateFileCheckSums(file.Path)
+		if err != nil {
+			return nil, err
+		}
+
+		logrus.Debugf("Image %s - %s - %s", md5sum, file.ModTime.Format(time.RFC3339), file.Path)
+
+		imageFiles = append(imageFiles, &ImageNode{
+			Path:    file.Path,
+			ModTime: file.ModTime,
+			Md5Sum:  md5sum,
+		})
+	}
+
+	return imageFiles, nil
+}

internal/pkg/localFileStructure/types.go

@@ -1,13 +1,24 @@
 package localFileStructure
 
-import "fmt"
+import (
+	"fmt"
+	"time"
+)
 
 type FilesystemNode struct {
 	Key     string
+	Path    string
 	Name    string
 	IsDir   bool
+	ModTime time.Time
 }
 
 func (n *FilesystemNode) String() string {
-	return fmt.Sprintf("FilesystemNode: %s", n.Key)
+	return fmt.Sprintf("FilesystemNode: %s", n.Path)
+}
+
+type ImageNode struct {
+	Path    string
+	ModTime time.Time
+	Md5Sum  string
 }

internal/pkg/piwigo/picture/upload.go

@@ -1,6 +1,5 @@
 package picture
 
-
 /*
 http://pictures.haefelfinger.net/ws.php?format=json
 {