add initial stuff

internal/db/connect.go

@@ -0,0 +1,93 @@
+package db
+
+import (
+	"database/sql"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/golang-migrate/migrate/v4"
+	"github.com/golang-migrate/migrate/v4/source/iofs"
+
+	"github.com/golang-migrate/migrate/v4/database/sqlite3"
+	_ "github.com/mattn/go-sqlite3"
+
+	"github.com/kujtimiihoxha/termai/internal/logging"
+	"github.com/spf13/viper"
+)
+
+var log = logging.Get()
+
+func Connect() (*sql.DB, error) {
+	dataDir := viper.GetString("data.dir")
+	if dataDir == "" {
+		return nil, fmt.Errorf("data.dir is not set")
+	}
+	if err := os.MkdirAll(dataDir, 0o700); err != nil {
+		return nil, fmt.Errorf("failed to create data directory: %w", err)
+	}
+	dbPath := filepath.Join(dataDir, "termai.db")
+	// Open the SQLite database
+	db, err := sql.Open("sqlite3", dbPath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to open database: %w", err)
+	}
+
+	// Verify connection
+	if err = db.Ping(); err != nil {
+		db.Close()
+		return nil, fmt.Errorf("failed to connect to database: %w", err)
+	}
+
+	// Set pragmas for better performance
+	pragmas := []string{
+		"PRAGMA foreign_keys = ON;",
+		"PRAGMA journal_mode = WAL;",
+		"PRAGMA page_size = 4096;",
+		"PRAGMA cache_size = -8000;",
+		"PRAGMA synchronous = NORMAL;",
+	}
+
+	for _, pragma := range pragmas {
+		if _, err = db.Exec(pragma); err != nil {
+			log.Warn("Failed to set pragma", pragma, err)
+		} else {
+			log.Warn("Set pragma", "pragma", pragma)
+		}
+	}
+
+	// Initialize schema from embedded file
+	d, err := iofs.New(FS, "migrations")
+	if err != nil {
+		log.Error("Failed to open embedded migrations", "error", err)
+		db.Close()
+		return nil, fmt.Errorf("failed to open embedded migrations: %w", err)
+	}
+
+	driver, err := sqlite3.WithInstance(db, &sqlite3.Config{})
+	if err != nil {
+		log.Error("Failed to create SQLite driver", "error", err)
+		db.Close()
+		return nil, fmt.Errorf("failed to create SQLite driver: %w", err)
+	}
+
+	m, err := migrate.NewWithInstance("iofs", d, "ql", driver)
+	if err != nil {
+		log.Error("Failed to create migration instance", "error", err)
+		db.Close()
+		return nil, fmt.Errorf("failed to create migration instance: %w", err)
+	}
+
+	err = m.Up()
+	if err != nil && err != migrate.ErrNoChange {
+		log.Error("Migration failed", "error", err)
+		db.Close()
+		return nil, fmt.Errorf("failed to apply schema: %w", err)
+	} else if err == migrate.ErrNoChange {
+		log.Info("No schema changes to apply")
+	} else {
+		log.Info("Schema migration applied successfully")
+	}
+
+	return db, nil
+}