refactor: migrate to latest gorm version

refactor: language mappings implementation

migrations/common/custom_pre.go

@@ -0,0 +1,33 @@
+package common
+
+import (
+	"github.com/muety/wakapi/config"
+	"github.com/muety/wakapi/models"
+	"gorm.io/gorm"
+	"log"
+)
+
+var customPreMigrations []migrationFunc
+
+func init() {
+	customPreMigrations = []migrationFunc{
+		{
+			f: func(db *gorm.DB, cfg *config.Config) error {
+				if db.Migrator().HasTable("custom_rules") {
+					return db.Migrator().RenameTable("custom_rules", &models.LanguageMapping{})
+				}
+				return nil
+			},
+			name: "rename language mappings table",
+		},
+	}
+}
+
+func RunCustomPreMigrations(db *gorm.DB, cfg *config.Config) {
+	for _, m := range customPreMigrations {
+		log.Printf("running migration '%s'\n", m.name)
+		if err := m.f(db, cfg); err != nil {
+			log.Fatalf("migration '%s' failed – %v\n", m.name, err)
+		}
+	}
+}