chore: replace logrus with standard lib log/slog

internal/app/auth/auth.go

@@ -7,13 +7,13 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"log/slog"
 	"net/url"
 	"path"
 	"strings"
 	"time"
 
 	"github.com/coreos/go-oidc/v3/oidc"
-	"github.com/sirupsen/logrus"
 	evbus "github.com/vardius/message-bus"
 
 	"github.com/h44z/wg-portal/internal/app"
@@ -227,7 +227,7 @@ func (a *Authenticator) passwordAuthentication(
 			rawUserInfo, err := ldapAuth.GetUserInfo(context.Background(), identifier)
 			if err != nil {
 				if !errors.Is(err, domain.ErrNotFound) {
-					logrus.Warnf("failed to fetch ldap user info for %s: %v", identifier, err)
+					slog.Warn("failed to fetch ldap user info", "identifier", identifier, "error", err)
 				}
 				continue // user not found / other ldap error
 			}
@@ -407,8 +407,10 @@ func (a *Authenticator) registerNewUser(
 		return nil, fmt.Errorf("failed to register new user: %w", err)
 	}
 
-	logrus.Tracef("registered user %s from external authentication provider, admin user: %t",
-		user.Identifier, user.IsAdmin)
+	slog.Debug("registered user from external authentication provider",
+		"user", user.Identifier,
+		"isAdmin", user.IsAdmin,
+		"provider", source)
 
 	return user, nil
 }
@@ -483,8 +485,10 @@ func (a *Authenticator) updateExternalUser(
 		return fmt.Errorf("failed to update user: %w", err)
 	}
 
-	logrus.Tracef("updated user %s with data from external authentication provider, admin user: %t",
-		existingUser.Identifier, existingUser.IsAdmin)
+	slog.Debug("updated user with data from external authentication provider",
+		"user", existingUser.Identifier,
+		"isAdmin", existingUser.IsAdmin,
+		"provider", source)
 
 	return nil
 }

internal/app/auth/auth_ldap.go

@@ -4,10 +4,10 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"log/slog"
 	"strings"
 
 	"github.com/go-ldap/ldap/v3"
-	"github.com/sirupsen/logrus"
 
 	"github.com/h44z/wg-portal/internal"
 	"github.com/h44z/wg-portal/internal/config"
@@ -117,7 +117,10 @@ func (l LdapAuthenticator) GetUserInfo(_ context.Context, userId domain.UserIden
 
 	if l.cfg.LogUserInfo {
 		contents, _ := json.Marshal(users[0])
-		logrus.Tracef("User info from LDAP source %s for %s: %v", l.GetName(), userId, string(contents))
+		slog.Debug("LDAP user info",
+			"source", l.GetName(),
+			"userId", userId,
+			"info", string(contents))
 	}
 
 	return users[0], nil

internal/app/auth/auth_oauth.go

@@ -5,10 +5,10 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
+	"log/slog"
 	"net/http"
 	"time"
 
-	"github.com/sirupsen/logrus"
 	"golang.org/x/oauth2"
 
 	"github.com/h44z/wg-portal/internal"
@@ -111,7 +111,9 @@ func (p PlainOauthAuthenticator) GetUserInfo(
 	}
 
 	if p.userInfoLogging {
-		logrus.Tracef("User info from OAuth source %s: %v", p.name, string(contents))
+		slog.Debug("OAuth user info",
+			"source", p.name,
+			"info", string(contents))
 	}
 
 	return userFields, nil

internal/app/auth/auth_oidc.go

@@ -5,9 +5,9 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"log/slog"
 
 	"github.com/coreos/go-oidc/v3/oidc"
-	"github.com/sirupsen/logrus"
 	"golang.org/x/oauth2"
 
 	"github.com/h44z/wg-portal/internal/config"
@@ -106,7 +106,9 @@ func (o OidcAuthenticator) GetUserInfo(ctx context.Context, token *oauth2.Token,
 
 	if o.userInfoLogging {
 		contents, _ := json.Marshal(tokenFields)
-		logrus.Tracef("User info from OIDC source %s: %v", o.name, string(contents))
+		slog.Debug("OIDC user info",
+			"source", o.name,
+			"info", string(contents))
 	}
 
 	return tokenFields, nil