add subproject kontor-gin

kontor-gin/pkg/schema/database.go

@@ -0,0 +1,69 @@
+package schema
+
+import (
+    "fmt"
+    "log"
+    "os"
+    "time"
+
+    "gorm.io/driver/postgres"
+    "gorm.io/gorm"
+    "gorm.io/gorm/logger"
+    
+)
+
+var DB *gorm.DB
+
+func Connect() {
+    // Build the connection string from environment variables
+    // This keeps sensitive credentials out of the codebase
+    dsn := fmt.Sprintf(
+        "host=%s user=%s password=%s dbname=%s port=%s sslmode=disable",
+        os.Getenv("DB_HOST"),
+        os.Getenv("DB_USER"),
+        os.Getenv("DB_PASSWORD"),
+        os.Getenv("DB_NAME"),
+        os.Getenv("DB_PORT"),
+    )
+
+    // Configure GORM with custom settings
+    // The logger helps with debugging SQL queries during development
+    db, err := gorm.Open(postgres.Open(dsn), &gorm.Config{
+        Logger: logger.Default.LogMode(logger.Info),
+    })
+    if err != nil {
+        log.Fatal("Failed to connect to database:", err)
+    }
+
+    // Get the underlying SQL database connection for pool configuration
+    sqlDB, err := db.DB()
+    if err != nil {
+        log.Fatal("Failed to get database instance:", err)
+    }
+
+    // Configure connection pool settings
+    // MaxIdleConns: number of connections kept open when idle
+    sqlDB.SetMaxIdleConns(10)
+    // MaxOpenConns: maximum total connections to the database
+    sqlDB.SetMaxOpenConns(100)
+    // ConnMaxLifetime: how long a connection can be reused
+    sqlDB.SetConnMaxLifetime(time.Hour)
+
+    DB = db
+    log.Println("Database connected successfully")
+}
+
+func RunMigrations() {
+    // AutoMigrate creates tables, missing columns, and missing indexes
+    // It will NOT delete unused columns to protect your data
+    err := DB.AutoMigrate(
+        &MediaActor{},
+        &MediaFile{},
+        &MediaActorFile{},
+    )
+    if err != nil {
+        log.Fatal("Migration failed:", err)
+    }
+
+    log.Println("Database migration completed")
+}