1 files changed, 92 insertions, 0 deletions

diff --git a/backend/controllers/loginController.go b/backend/controllers/loginController.go
new file mode 100644
index 0000000..50189e8
--- /dev/null
+++ b/backend/controllers/loginController.go
@@ -0,0 +1,92 @@
+package controllers
+
+import (
+        "encoding/json"
+        "fmt"
+        "io/ioutil"
+        "net/http"
+        "os"
+        "time"
+
+        "github.com/gin-gonic/gin"
+        "github.com/golang-jwt/jwt/v4"
+        "github.com/pektezol/leastportals/backend/database"
+        "github.com/pektezol/leastportals/backend/models"
+        "github.com/solovev/steam_go"
+)
+
+func Login(c *gin.Context) {
+        openID := steam_go.NewOpenId(c.Request)
+        switch openID.Mode() {
+        case "":
+                c.Redirect(http.StatusMovedPermanently, openID.AuthUrl())
+        case "cancel":
+                c.Redirect(http.StatusMovedPermanently, "/")
+        default:
+                steamID, err := openID.ValidateAndGetId()
+                if err != nil {
+                        c.JSON(http.StatusBadRequest, models.ErrorResponse(err.Error()))
+                        return
+                }
+                // Create user if new
+                var checkSteamID int64
+                err = database.DB.QueryRow("SELECT steam_id FROM users WHERE steam_id = $1", steamID).Scan(&checkSteamID)
+                if err != nil {
+                        c.JSON(http.StatusBadRequest, models.ErrorResponse(err.Error()))
+                        return
+                }
+                // User does not exist
+                if checkSteamID == 0 {
+                        user, err := GetPlayerSummaries(steamID, os.Getenv("API_KEY"))
+                        if err != nil {
+                                c.JSON(http.StatusBadRequest, models.ErrorResponse(err.Error()))
+                                return
+                        }
+                        // Insert new user to database
+                        database.DB.Exec(`INSERT INTO users (steam_id, username, avatar_link, country_code)
+                        VALUES ($1, $2, $3, $4)`, steamID, user.PersonaName, user.AvatarFull, user.LocCountryCode)
+                }
+                // Generate JWT token
+                token := jwt.NewWithClaims(jwt.SigningMethodHS256, jwt.MapClaims{
+                        "sub": steamID,
+                        "exp": time.Now().Add(time.Hour * 24 * 365).Unix(),
+                })
+                // Sign and get the complete encoded token as a string using the secret
+                tokenString, err := token.SignedString([]byte(os.Getenv("SECRET_KEY")))
+                if err != nil {
+                        c.JSON(http.StatusBadRequest, models.ErrorResponse("Failed to generate token."))
+                        return
+                }
+                c.JSON(http.StatusOK, models.Response{
+                        Success: true,
+                        Message: "Successfully generated token.",
+                        Data: models.LoginResponse{
+                                Token: tokenString,
+                        },
+                })
+                return
+        }
+}
+
+func GetPlayerSummaries(steamId, apiKey string) (*models.PlayerSummaries, error) {
+        url := fmt.Sprintf("http://api.steampowered.com/ISteamUser/GetPlayerSummaries/v2/?key=%s&steamids=%s", apiKey, steamId)
+        resp, err := http.Get(url)
+        if err != nil {
+                return nil, err
+        }
+        body, err := ioutil.ReadAll(resp.Body)
+        if err != nil {
+                return nil, err
+        }
+
+        type Result struct {
+                Response struct {
+                        Players []models.PlayerSummaries `json:"players"`
+                } `json:"response"`
+        }
+        var data Result
+        if err := json.Unmarshal(body, &data); err != nil {
+                return nil, err
+        }
+        return &data.Response.Players[0], err
+}