family-lineage/server/plugin/entities/entities.go

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 {
	Presence runtime.Presence
	X        float64
	Y        float64
}

// PlayerPosResponse struct that represents client data
type PlayerPosResponse struct {
	X float64
	Y float64
}

// 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 {
	p.Y = response.Y
	p.X = response.X

	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
}