From ced1427b43d68fe0f40cdf3cb304b06eefd6153f Mon Sep 17 00:00:00 2001
From: alex <alexander.vrabel@proton.me>
Date: Sat, 4 Jul 2026 22:33:25 +0200
Subject: added parsing of simple strings and fixed bug in INCR/DECR

---
 main.go | 64 +++++++++++++++++++++++++++++++++++++++-------------------------
 1 file changed, 39 insertions(+), 25 deletions(-)

(limited to 'main.go')

diff --git a/main.go b/main.go
index 7e8c13e..5db75f3 100644
--- a/main.go
+++ b/main.go
@@ -83,11 +83,14 @@ func handleDel(conn net.Conn, key string){
 
 func handleIncr(conn net.Conn, key string){
 	db.mu.Lock()
+	defer db.mu.Unlock()
+
 	value, exists := db.data[key]
 	if exists {
 		currentInt, err := strconv.Atoi(value)
 		if err != nil {
 			conn.Write([]byte("-ERR value is not an integer or out of range\r\n"))
+			return
 		}
 
 		newValueStr := strconv.Itoa(currentInt+1)
@@ -97,18 +100,18 @@ func handleIncr(conn net.Conn, key string){
 		db.data[key] = "1"
 		conn.Write([]byte(":1\r\n"))
 	}
-
-	db.mu.Unlock()
-
 }
 
 func handleDecr(conn net.Conn, key string){
 	db.mu.Lock()
+	defer db.mu.Unlock()
+
 	value, exists := db.data[key]
 	if exists {
 		currentInt, err := strconv.Atoi(value)
 		if err != nil {
 			conn.Write([]byte("-ERR value is not an integer or out of range\r\n"))
+			return
 		}
 
 		newValueStr := strconv.Itoa(currentInt-1)
@@ -118,9 +121,6 @@ func handleDecr(conn net.Conn, key string){
 		db.data[key] = "-1"
 		conn.Write([]byte(":-1\r\n"))
 	}
-
-	db.mu.Unlock()
-
 }
 
 func handlePing(conn net.Conn) {
@@ -138,34 +138,48 @@ func parseRESP(reader *bufio.Reader) ([]string, error) {
     if err != nil {
         return nil, err
     }
-	var args []string
 
-	argC, _ := strconv.Atoi(strings.TrimSpace(line[1:]))
+	if len(line) == 0 {
+        return nil, fmt.Errorf("empty line")
+    }
 
-	for i := 0; i < argC; i++ {
-    	lengthLine, err := reader.ReadString('\n')
-		
-		if err != nil {
-			return nil, err
-		}
+	switch line[0] {
+    case '*':
+		var args []string
+		argC, _ := strconv.Atoi(strings.TrimSpace(line[1:]))
 
-		strLen, _ := strconv.Atoi(strings.TrimSpace(lengthLine[1:]))
+		for i := 0; i < argC; i++ {
+			lengthLine, err := reader.ReadString('\n')
+			
+			if err != nil {
+				return nil, err
+			}
 
-		buf := make([]byte, strLen)
+			strLen, _ := strconv.Atoi(strings.TrimSpace(lengthLine[1:]))
 
-		_, err = io.ReadFull(reader, buf)
-		if err != nil {
-			return nil, err
-		}
+			buf := make([]byte, strLen)
 
-		_, err = reader.Discard(2)
-		if err != nil {
-			return nil, err
+			_, err = io.ReadFull(reader, buf)
+			if err != nil {
+				return nil, err
+			}
+
+			_, err = reader.Discard(2)
+			if err != nil {
+				return nil, err
+			}
+
+			args = append(args, string(buf))
 		}
+		return args, nil
+
+    case '+':
+        cleanStr := strings.TrimSpace(line[1:])
+        return []string{cleanStr}, nil
 
-		args = append(args, string(buf))
+    default:
+        return nil, fmt.Errorf("unknown command type: %c", line[0])
     }
-	return args, nil
 }
 func handleConnection(conn net.Conn) {
 	defer conn.Close()
-- 
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