Re-struct pkg/api, pkg/database

pkg/database/database.go

@@ -0,0 +1,36 @@
+package database
+
+import (
+	"database/sql"
+
+	_ "github.com/mattn/go-sqlite3"
+)
+
+type Database struct {
+	sqlConn *sql.DB
+	stmt    *Stmt
+}
+
+func NewDatabase(dbName string) (*Database, error) {
+	var err error
+
+	// open database
+	sqlConn, err := sql.Open("sqlite3", dbName)
+	if err != nil {
+		return nil, err
+	}
+
+	// prepare statement
+	stmt, err := NewPreparedStatement(sqlConn)
+	if err != nil {
+		return nil, err
+	}
+
+	// new database
+	database := &Database{
+		sqlConn: sqlConn,
+		stmt:    stmt,
+	}
+
+	return database, nil
+}