Added array serialization to encode function. Moved message reading to utils packages as it's used by both server and client

client/main.go

@@ -14,6 +14,7 @@ import (
 	"path"
 
 	"github.com/kelvinmwinuka/memstore/serialization"
+	"github.com/kelvinmwinuka/memstore/utils"
 	"gopkg.in/yaml.v3"
 )
 
@@ -122,8 +123,7 @@ func main() {
 			stdioRW.Flush()
 
 			if in, err := stdioRW.ReadBytes(byte('\n')); err != nil {
-				stdioRW.Write([]byte(fmt.Sprintf("ERROR: %s\n", err)))
-				stdioRW.Flush()
+				fmt.Println(err)
 			} else {
 				in := bytes.TrimSpace(in)
 
@@ -133,28 +133,30 @@ func main() {
 				}
 
 				if err := serialization.Encode(connRW, string(in)); err != nil {
-					stdioRW.Write([]byte(fmt.Sprintf("%s\n", err.Error())))
-					stdioRW.Flush()
+					fmt.Println(err)
 				} else {
 					// Write encoded command to the connection
 					connRW.Write([]byte("\n"))
 					connRW.Flush()
 
 					// Read response from server
-					if l, _, err := connRW.ReadLine(); err != nil {
-						if err == io.EOF {
-							// Break loop when we detect an EOF (Connection closed)
-							stdioRW.Write([]byte("Connection closed"))
-							stdioRW.Flush()
-							break
-						} else {
-							stdioRW.Write([]byte(err.Error()))
-							stdioRW.Flush()
-						}
-					} else {
-						stdioRW.Write(l)
-						stdioRW.Flush()
+					message, err := utils.ReadMessage(connRW)
+
+					if err != nil && err == io.EOF {
+						fmt.Println(err)
+						break
+					} else if err != nil {
+						fmt.Println(err)
 					}
+
+					decoded, err := serialization.Decode(message)
+
+					if err != nil {
+						fmt.Println(err)
+						continue
+					}
+
+					fmt.Println(decoded)
 				}
 			}
 		}

serialization/decode.go

@@ -9,6 +9,7 @@ import (
 
 func Decode(raw string) ([]string, error) {
 	rd := resp.NewReader(bytes.NewBufferString(raw))
+	res := []string{}
 
 	v, _, err := rd.ReadValue()
 
@@ -16,8 +17,6 @@ func Decode(raw string) ([]string, error) {
 		return nil, err
 	}
 
-	res := []string{}
-
 	if v.Type().String() == "SimpleString" {
 		return []string{v.String()}, nil
 	}

serialization/encode.go

@@ -29,7 +29,6 @@ func encodeError(wr *resp.Writer, tokens []string) {
 }
 
 func encodeSimpleString(wr *resp.Writer, tokens []string) error {
-	fmt.Println(tokens, len(tokens))
 	switch len(tokens) {
 	default:
 		return fmt.Errorf(wrong_args_error, strings.ToUpper(tokens[0]))
@@ -40,6 +39,23 @@ func encodeSimpleString(wr *resp.Writer, tokens []string) error {
 	}
 }
 
+func encodeArray(wr *resp.Writer, tokens []string) error {
+	switch l := len(tokens); {
+	default:
+		return fmt.Errorf(wrong_args_error, strings.ToUpper(tokens[0]))
+	case l > 0:
+		arr := []resp.Value{}
+
+		for _, token := range tokens[1:] {
+			arr = append(arr, resp.AnyValue(token))
+		}
+
+		wr.WriteArray(arr)
+
+		return nil
+	}
+}
+
 func encodePingPong(wr *resp.Writer, tokens []string) error {
 	switch len(tokens) {
 	default:
@@ -171,6 +187,8 @@ func Encode(buf io.ReadWriter, comm string) error {
 		err = encodeIncr(wr, tokens)
 	case "simplestring":
 		err = encodeSimpleString(wr, tokens)
+	case "array":
+		err = encodeArray(wr, tokens)
 	case "Error":
 		encodeError(wr, tokens)
 		err = errors.New("failed to parse command")

server/main.go

@@ -2,7 +2,6 @@ package main
 
 import (
 	"bufio"
-	"bytes"
 	"crypto/tls"
 	"encoding/json"
 	"flag"
@@ -16,6 +15,7 @@ import (
 	"sync"
 
 	"github.com/kelvinmwinuka/memstore/serialization"
+	"github.com/kelvinmwinuka/memstore/utils"
 	"gopkg.in/yaml.v3"
 )
 
@@ -37,56 +37,54 @@ type Server struct {
 	data   Data
 }
 
-func (server *Server) hanndleConnection(conn net.Conn) {
+func (server *Server) handleConnection(conn net.Conn) {
 	connRW := bufio.NewReadWriter(bufio.NewReader(conn), bufio.NewWriter(conn))
 
-	var line [][]byte
-
 	for {
-		b, _, err := connRW.ReadLine()
+		message, err := utils.ReadMessage(connRW)
 
 		if err != nil && err == io.EOF {
 			fmt.Println(err)
 			break
 		}
 
-		line = append(line, b)
+		if err != nil {
+			fmt.Println(err)
+			continue
+		}
 
-		if bytes.Equal(b, []byte("")) {
-			// End of RESP message
-			// sw.Write(bytes.Join(line, []byte("\\r\\n")))
-			// sw.Flush()
+		if cmd, err := serialization.Decode(message); err != nil {
+			// Return error to client
+			serialization.Encode(connRW, fmt.Sprintf("Error %s", err.Error()))
+			fmt.Println("Server: ", err)
+			continue
+		} else {
+			// Return encoded message to client
 
-			if cmd, err := serialization.Decode(string(bytes.Join(line, []byte("\r\n")))); err != nil {
-				// Return error to client
-				serialization.Encode(connRW, fmt.Sprintf("Error %s", err.Error()))
-				continue
-			} else {
-				// Return encoded message to client
-
-				switch strings.ToLower(cmd[0]) {
-				default:
-					fmt.Println("The command is unknown")
-				case "ping":
-					if len(cmd) == 1 {
-						serialization.Encode(connRW, "SimpleString PONG")
-						connRW.Flush()
-					}
-					if len(cmd) == 2 {
-						fmt.Println(cmd)
-						serialization.Encode(connRW, fmt.Sprintf("SimpleString \"%s\"", cmd[1]))
-						connRW.Flush()
-					}
-				case "set":
-					fmt.Println("Set the value")
-				case "get":
-					fmt.Println("Get the value")
-				case "mget":
-					fmt.Println("Get the multiple values requested")
+			switch strings.ToLower(cmd[0]) {
+			default:
+				fmt.Println("The command is unknown")
+			case "ping":
+				if len(cmd) == 1 {
+					serialization.Encode(connRW, "SimpleString PONG")
+					connRW.Write([]byte("\n"))
+					connRW.Flush()
 				}
+				if len(cmd) == 2 {
+					serialization.Encode(connRW, fmt.Sprintf("SimpleString \"%s\"", cmd[1]))
+					connRW.Write([]byte("\n"))
+					connRW.Flush()
+				}
+			case "set":
+				fmt.Println("Set the value")
+			case "get":
+				fmt.Println("Get the value")
+			case "mget":
+				fmt.Println("Get the multiple values requested")
+				serialization.Encode(connRW, "Array THIS IS THE ARRAY")
+				connRW.Write([]byte("\n"))
+				connRW.Flush()
 			}
-
-			line = [][]byte{}
 		}
 	}
 
@@ -132,7 +130,7 @@ func (server *Server) StartTCP() {
 			continue
 		}
 		// Read loop for connection
-		go server.hanndleConnection(conn)
+		go server.handleConnection(conn)
 	}
 }
 

utils/utils.go

@@ -1,6 +1,11 @@
 package utils
 
-import "math"
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"math"
+)
 
 func Contains[T comparable](arr []T, elem T) bool {
 	for _, v := range arr {
@@ -14,3 +19,24 @@ func Contains[T comparable](arr []T, elem T) bool {
 func IsInteger(n float64) bool {
 	return math.Mod(n, 1.0) == 0
 }
+
+func ReadMessage(r *bufio.ReadWriter) (message string, err error) {
+	var line [][]byte
+
+	for {
+		b, _, err := r.ReadLine()
+
+		if err != nil {
+			return "", err
+		}
+
+		if bytes.Equal(b, []byte("")) {
+			// End of message
+			break
+		}
+
+		line = append(line, b)
+	}
+
+	return fmt.Sprintf("%s\r\n", string(bytes.Join(line, []byte("\r\n")))), nil
+}