feat: init project + server prot is ready

server/response.go

@@ -0,0 +1,90 @@
+package server
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"log"
+	"maps"
+	"strconv"
+)
+
+type Response struct {
+	StatusCode int
+	Format DataFormat
+	Headers map[string]string
+	Payload []byte
+}
+
+func NewStatusResponse(status int) *Response {
+	return &Response{
+		StatusCode: status,
+		Headers: make(map[string]string),
+		Format: DataFormat{
+			Format: DF_BYTES,
+			Encoding: "",
+		},
+		Payload: make([]byte, 0),
+	}
+}
+
+func NewTextResponse(text string) *Response {
+	return &Response{
+		StatusCode: STATUS_SUCCESS,
+		Headers: make(map[string]string),
+		Format: DataFormat{
+			Format: DF_TEXT,
+			Encoding: E_UTF8,
+		},
+		Payload: []byte(text),
+	}
+}
+
+func NewJsonResponse(data map[string]string) (*Response, error) {
+	jsonBytes, err := json.Marshal(data)
+	if err != nil {
+		return nil, err
+	}
+
+	return &Response{
+		StatusCode: STATUS_SUCCESS,
+		Headers: make(map[string]string),
+		Format: DataFormat{
+			Format: DF_JSON,
+			Encoding: E_UTF8,
+		},
+		Payload: jsonBytes,
+	}, nil
+}
+
+func (res *Response) ToPacket() *Packet {
+	headers := make(map[string]string)
+
+	maps.Copy(headers, res.Headers)
+
+	headers[H_DATA_FORMAT] = fmt.Sprintf("%s:%s", res.Format.Format, res.Format.Encoding)
+	headers[H_STATUS] = strconv.Itoa(res.StatusCode)
+
+	return BuildPacket(headers, res.Payload)
+}
+
+func (res *Response) AddHeader(key, value string) {
+	if _, ok := res.Headers[key]; ok {
+		log.Printf("WARN: Rewriting already existing header: '%s'\n", key)
+	}
+	res.Headers[key] = value
+}
+
+func (res *Response) Write(p []byte) (int, error) {
+	buf := new(bytes.Buffer)
+
+	n, err := buf.Write(p)
+	if err != nil {
+		return n, err
+	}
+
+	res.Payload = buf.Bytes()
+
+	return n, err
+}
+