Feat: login done

backend/handlers/api/getUser.go

@@ -0,0 +1,55 @@
+package api
+
+import (
+	"database/sql"
+	"net/http"
+
+	"gitea.konchin.com/ytshih/inp2025/game/backend/middlewares"
+	"github.com/uptrace/bunrouter"
+)
+
+type GetUserOutput struct {
+	Username string `json:"username"`
+}
+
+// GetUser
+//
+//	@Accept		json
+//	@Param		username	query	string	true	"Username to be queried"
+//	@Success	200
+//	@Failure	400
+//	@Router		/api/user [get]
+func (self *Handlers) GetUser(
+	w http.ResponseWriter,
+	req bunrouter.Request,
+) error {
+	ctx := req.Context()
+
+	username := req.URL.Query().Get("username")
+	if username == "" {
+		return middlewares.HTTPError{
+			StatusCode: http.StatusBadRequest,
+			Message:    "must provide username",
+		}
+	}
+
+	user, err := self.db.GetUser(ctx, username)
+	if err != nil {
+		if err == sql.ErrNoRows {
+			return middlewares.HTTPError{
+				StatusCode:  http.StatusNotFound,
+				Message:     "user not exist",
+				OriginError: err,
+			}
+		}
+		return middlewares.HTTPError{
+			StatusCode:  http.StatusInternalServerError,
+			Message:     "failed to get user",
+			OriginError: err,
+		}
+	}
+
+	return bunrouter.JSON(w, GetUserOutput{
+		Username: user.Username,
+	})
+}