Improve library sync, add more config values

.env.example

@@ -1,4 +1,5 @@
 # Server Configuration
+SERVER_HOSTNAME=127.0.0.1
 SERVER_PORT=8080
 GIN_MODE=debug
 

src/config/config.go

@@ -8,6 +8,7 @@ import (
 
 type Config struct {
 	Server struct {
+		Hostname string
 		Port     string
 		Mode     string // gin.Mode: debug, release, test
 	}
@@ -30,7 +31,8 @@ func Load() {
 	cfg := &Config{}
 
 	// Server configuration
-	cfg.Server.Port = getEnv("SERVER_PORT", ":8080")
+	cfg.Server.Hostname = getEnv("SERVER_HOSTNAME", "127.0.0.1")
+	cfg.Server.Port = getEnv("SERVER_PORT", "8080")
 	cfg.Server.Mode = getEnv("GIN_MODE", "debug")
 
 	// JWT configuration

src/main.go

@@ -41,7 +41,7 @@ func main() {
 	routes.SetupRoutes(r)
 
 	log.Printf("Server starting on port %s...", config.AppConfig.Server.Port)
-	if err := r.Run(config.AppConfig.Server.Port); err != nil {
+	if err := r.Run(config.AppConfig.Server.Hostname + ":" + config.AppConfig.Server.Port); err != nil {
 		log.Fatal("Failed to start server:", err)
 	}
 }

src/models/sheet.go

@@ -13,7 +13,7 @@ type Sheet struct {
 	Description  string         `json:"description"`
 	FilePath     string         `json:"file_path" gorm:"not null"`
 	FileSize     int64          `json:"file_size"`
-	FileHash     uint64         `json:"file_hash"`
+	FileHash     string         `json:"file_hash"`
 	ComposerUuid uuid.UUID      `json:"composer_uuid"`
 	Composer     Composer       `json:"composer" gorm:"foreignKey:ComposerUuid"`
 	CreatedAt    time.Time      `json:"created_at"`

src/sync/sync.go

@@ -9,10 +9,14 @@ import (
 	"sheetless-server/handlers"
 	"sheetless-server/models"
 	"sheetless-server/utils"
+	"strings"
 	"time"
 )
 
 func SyncSheets() error {
+	log.Println("Running library sync")
+	syncStartTime := time.Now()
+
 	// Get all sheets
 	var sheets []models.Sheet
 	if err := database.DB.Find(&sheets).Error; err != nil {
@@ -21,33 +25,31 @@ func SyncSheets() error {
 
 	// Maps
 	pathsInDb := make(map[string]*models.Sheet)
-	hashToSheets := make(map[uint64][]*models.Sheet)
+	hashToSheets := make(map[string][]*models.Sheet)
 	for i := range sheets {
 		sheet := &sheets[i]
 		pathsInDb[sheet.FilePath] = sheet
 		hashToSheets[sheet.FileHash] = append(hashToSheets[sheet.FileHash], sheet)
 	}
 
-	// Walk uploads dir
+	numFilesWithNewHash := 0
-	files, err := os.ReadDir(config.AppConfig.SheetsDirectory)
+	numRenamedFiles := 0
-	if err != nil {
+	numNewFiles := 0
-		return err
+
+	// Walk sheets directory recursively for PDF files
+	err := filepath.Walk(config.AppConfig.SheetsDirectory, func(filePath string, info os.FileInfo, walkErr error) error {
+		if walkErr != nil {
+			return walkErr
 		}
 
-	for _, file := range files {
+		// Skip directories and non-PDF files
-		if file.IsDir() {
+		if info.IsDir() || filepath.Ext(filePath) != ".pdf" {
-			continue
+			return nil
 		}
-		filePath := filepath.Join(config.AppConfig.SheetsDirectory, file.Name())
 		hash, err := utils.FileHash(filePath)
 		if err != nil {
 			log.Printf("Error hashing file %s: %v", filePath, err)
-			continue
+			return nil
-		}
-		info, err := file.Info()
-		if err != nil {
-			log.Printf("Error getting file info %s: %v", filePath, err)
-			continue
 		}
 
 		existingSheet, exists := pathsInDb[filePath]
@@ -58,6 +60,8 @@ func SyncSheets() error {
 				existingSheet.UpdatedAt = time.Now()
 				if err := database.DB.Save(existingSheet).Error; err != nil {
 					log.Printf("Error updating sheet hash for %s: %v", filePath, err)
+				} else {
+					numFilesWithNewHash++
 				}
 			}
 		} else {
@@ -70,6 +74,8 @@ func SyncSheets() error {
 						s.UpdatedAt = time.Now()
 						if err := database.DB.Save(s).Error; err != nil {
 							log.Printf("Error updating sheet path for %s: %v", filePath, err)
+						} else {
+							numRenamedFiles++
 						}
 						break
 					}
@@ -79,11 +85,11 @@ func SyncSheets() error {
 				uuid, err := handlers.GenerateNonexistentSheetUuid()
 				if err != nil {
 					log.Printf("Error generating uuid: %v", err)
-					continue
+					return nil
 				}
 				newSheet := models.Sheet{
 					Uuid:      *uuid,
-					Title:     file.Name(), // use filename as title
+					Title:     strings.TrimSuffix(filepath.Base(filePath), ".pdf"), // use filename as title
 					FilePath:  filePath,
 					FileSize:  info.Size(),
 					FileHash:  hash,
@@ -92,10 +98,19 @@ func SyncSheets() error {
 				}
 				if err := database.DB.Create(&newSheet).Error; err != nil {
 					log.Printf("Error creating new sheet for %s: %v", filePath, err)
+				} else {
+					numNewFiles++
 				}
 			}
 		}
+		return nil
+	})
+
+	if numFilesWithNewHash != 0 || numRenamedFiles != 0 || numNewFiles != 0 {
+		log.Printf("Library sync succesfully run.\nChanged hashes: %d, renamed files: %d, new files: %d", numFilesWithNewHash, numRenamedFiles, numNewFiles)
 	}
 
-	return nil
+	log.Printf("Sync took %s", time.Since(syncStartTime))
+
+	return err
 }

src/utils/filehash.go

@@ -1,32 +1,39 @@
 package utils
 
 import (
+	"encoding/binary"
 	"hash/fnv"
 	"io"
 	"mime/multipart"
 	"os"
 )
 
-func FileHashFromUpload(file multipart.File) (uint64, error) {
+func FileHashFromUpload(file multipart.File) (string, error) {
 	h := fnv.New64a()
 	if _, err := io.Copy(h, file); err != nil {
-		return 0, err
+		return "", err
 	}
 
-	return h.Sum64(), nil
+	return u64ToString(h.Sum64()), nil
 }
 
-func FileHash(path string) (uint64, error) {
+func FileHash(path string) (string, error) {
 	f, err := os.Open(path)
 	if err != nil {
-		return 0, err
+		return "", err
 	}
 	defer f.Close()
 
 	h := fnv.New64a()
 	if _, err := io.Copy(h, f); err != nil {
-		return 0, err
+		return "", err
 	}
 
-	return h.Sum64(), nil
+	return u64ToString(h.Sum64()), nil
+}
+
+func u64ToString(x uint64) string {
+	var b [8]byte
+	binary.LittleEndian.PutUint64(b[:], x)
+	return string(b[:])
 }