:sparcles: サーバーに入っていなかったらサーバーに追加させる処理の追加

compose.yml

@@ -17,6 +17,8 @@ services:
       DISCORD_CLIENT_ID: ${DISCORD_CLIENT_ID}
       DISCORD_CLIENT_SECRET: ${DISCORD_CLIENT_SECRET}
       DISCORD_CLIENT_REDIRECT_URI: ${DISCORD_CLIENT_REDIRECT_URI}
+      DISCORD_SERVER_ID: ${DISCORD_SERVER_ID}
+      DISCORD_BOT_TOKEN: ${DISCORD_BOT_TOKEN}
     depends_on:
       db:
         condition: service_healthy

internal/api/discord.go

@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"encoding/json"
 	"errors"
+	"github.com/traPtitech/game3-back/internal/apperrors"
 	"github.com/traPtitech/game3-back/internal/enum"
 	"github.com/traPtitech/game3-back/internal/pkg/util"
 	"github.com/traPtitech/game3-back/openapi/models"
@@ -118,7 +119,9 @@ func AddUserToGuild(accessToken *string, guildID string, userID string) error {
 	botToken, err := util.GetEnvOrErr("DISCORD_BOT_TOKEN")
 	if err != nil {
 		return err
+
 	}
+
 	req.Header.Set("Authorization", "Bot "+botToken)
 	req.Header.Set("Content-Type", "application/json")
 
@@ -129,8 +132,16 @@ func AddUserToGuild(accessToken *string, guildID string, userID string) error {
 	}
 
 	defer resp.Body.Close()
+	if resp.StatusCode == http.StatusNoContent {
+		return apperrors.NewAlreadyInGuildError()
+	}
 	if resp.StatusCode != http.StatusCreated {
-		return errors.New("Failed to add user to guild: status " + resp.Status)
+		body, err := io.ReadAll(resp.Body)
+		if err != nil {
+			return err
+		}
+
+		return errors.New("Failed to add user to guild: status " + resp.Status + " body: " + string(body))
 	}
 
 	return nil

internal/apperrors/app_errors.go

@@ -71,3 +71,15 @@ func (e *SessionTokenNotFoundError) Error() string {
 func NewSessionTokenNotFoundError() error {
 	return &SessionTokenNotFoundError{}
 }
+
+// AlreadyInGuildError 既にギルドに所属している
+type AlreadyInGuildError struct{}
+
+func (e *AlreadyInGuildError) Error() string {
+	return "Already in the guild"
+}
+
+// NewAlreadyInGuildError 既にギルドに所属しているエラーを返す
+func NewAlreadyInGuildError() error {
+	return &AlreadyInGuildError{}
+}

internal/handler/auth.go

@@ -1,6 +1,7 @@
 package handler
 
 import (
+	"errors"
 	"github.com/google/uuid"
 	"github.com/labstack/echo/v4"
 	"github.com/traPtitech/game3-back/internal/api"
@@ -67,8 +68,11 @@ func (h *Handler) OauthCallback(c echo.Context, params models.OauthCallbackParam
 		return echo.NewHTTPError(http.StatusInternalServerError, err.Error())
 	}
 
-	if isInGame3Server == false {
+	if !isInGame3Server {
 		err = addUserToGame3Guild(tokenResponse.AccessToken)
+		if errors.Is(err, apperrors.NewAlreadyInGuildError()) {
+			// 起きないはずだけど pass
+		}
 		if err != nil {
 			return err
 		}