Implement server-side movement

server/plugin/entities/entities.go

@@ -1,7 +1,55 @@
 package entities
 
+import (
+	"encoding/json"
+	"fmt"
+	"github.com/heroiclabs/nakama-common/runtime"
+	"strconv"
+)
+
 // PlayerEntity is the go struct representing the player's location
 type PlayerEntity struct {
-	X int
-	Y int
+	Presence runtime.Presence
+	X        float64
+	Y        float64
+}
+
+// PlayerPosResponse struct that represents client data
+type PlayerPosResponse struct {
+	X string
+	Y string
+}
+
+// ParsePositionRequest parses data from client
+func (p *PlayerEntity) ParsePositionRequest(data []byte) (PlayerPosResponse, error) {
+	var response PlayerPosResponse
+	err := json.Unmarshal(data, &response)
+	return response, err
+}
+
+//UpdateBasedOnResponse updates the player object based on a response object
+func (p *PlayerEntity) UpdateBasedOnResponse(response PlayerPosResponse) error {
+	if fx, err := strconv.ParseFloat(response.X, 64); err != nil {
+		return err
+	} else {
+		p.X = fx
+		if fy, err := strconv.ParseFloat(response.Y, 64); err != nil {
+			return err
+		} else {
+			p.Y = fy
+		}
+	}
+
+	return nil
+}
+
+// GetPosJSON returns the player's position as a JSON object
+func (p *PlayerEntity) GetPosJSON() ([]byte, error) {
+	playerMap := map[string]string{
+		"player": p.Presence.GetUserId(),
+		"x":      fmt.Sprintf("%f", p.X),
+		"y":      fmt.Sprintf("%f", p.Y),
+	}
+	jsonData, err := json.Marshal(playerMap)
+	return jsonData, err
 }