Makefile, server entry point prototype, compareFiles function + other minor changes

internal/core/config.go

@@ -7,14 +7,11 @@ import (
 	"github.com/spf13/viper"
 )
 
-
 // Config will follow this model
 // server : string
 // port : int
 
-
-
-
+var config_loaded bool = false
 
 // Load config file
 func LoadConfig() error {
@@ -43,6 +40,7 @@ func LoadConfig() error {
 		// return err
 	}
 
+	config_loaded = true
 	return nil
 }
 
@@ -57,7 +55,16 @@ func LoadSyncList() error {
 }
 
 // returns all config variables
-// ! WARNING: Do not use this function without executing LoadConfig prior
 func GetConfig() map[string]any {
-	return viper.AllSettings()
+
+	if config_loaded {
+		return viper.AllSettings()
+	} else {
+		err := LoadConfig()
+		if err != nil {
+			panic("GetConfig: Failed to load config file -> " + err.Error())
+		}
+
+		return viper.AllSettings()
+	}
 }

internal/core/models.go

@@ -5,10 +5,10 @@ import (
 )
 
 type File struct {
-	ID       string
-	ParentDirectory     string
-	Metadata FileMetadata
-	State    SynchronizationState
+	ID              string
+	ParentDirectory Folder
+	Metadata        FileMetadata
+	State           SynchronizationState
 }
 
 type FileMetadata struct {
@@ -22,4 +22,13 @@ type SynchronizationState struct {
 	Status    string // "pending", "in_progress", "completed", "error"
 	Progress  float64
 	LastError error
+}
+
+type Folder struct {
+	ID				string
+	Files			[]File
+	Subfolders		[]Folder
+	
+	Name 			string
+	Path			string
 }

internal/core/utils.go

@@ -1,8 +1,36 @@
 package core
 
+import (
+	"crypto/sha256"
+	"io"
+	"os"
+)
 
-//! Not implemented
-func CompareFiles(file1 File, file2 File) bool {
-	return false
+// Panic if e contains an error
+func Check(e error) {
+	if e != nil {
+		panic("Check: A fatal error occured during execution -> " + e.Error())
+	}
 }
 
+// Returns true if files correspond
+func CompareFiles(file1 File, file2 File) bool {
+	return file1.Metadata.Hash == file2.Metadata.Hash
+}
+
+// Gets the sha256 hash of a file's content
+func GetHash(file File) ([]byte, error) {
+	// init
+	hasher := sha256.New()
+	file_path := "" //TODO: missing
+	// Open file
+	f, err := os.Open(file_path)
+	if err != nil { // Path error
+		return nil, err
+	}
+	// Compute hash
+	io.Copy(hasher, f)
+	sum := hasher.Sum(nil)
+
+	return sum, nil
+}

internal/server/server.go

@@ -27,7 +27,7 @@ func Run() {
 	serverPort := strconv.Itoa(config["port"].(int))
 
 	// Listening
-	listener, err := net.Listen("tcp", ":" + serverPort)
+	listener, err := net.Listen("tcp", ":"+serverPort)
 	if err != nil {
 		panic(err)
 	}
@@ -65,7 +65,7 @@ func handleConnection(conn net.Conn) {
 			log.Println("Error reading from ", clientAddress, ": ", err)
 			return
 		}
-		
+
 		// to rm
 		println(message)
 		// fmt.Println("Received from client:", message)
@@ -76,7 +76,7 @@ func handleConnection(conn net.Conn) {
 		// Send a response to the client
 		_, err = conn.Write([]byte("Server received your message\n"))
 		if err != nil {
-			log.Println("Error replying to", clientAddress,": ", err)
+			log.Println("Error replying to", clientAddress, ": ", err)
 			return
 		}
 	}