add db-wrapper package types

internal/app/db-wrapper/main.go

@@ -0,0 +1,14 @@
+package dbwrapper
+
+import "fmt"
+
+func NewWrapper(driverType string) (DbWrapper, error) {
+	switch driverType {
+	case "postgres":
+		return &postgresDbWrapper{}, nil
+	case "sqlserver":
+		return &mssqlDbWrapper{}, nil
+	default:
+		return nil, fmt.Errorf("driver not yet supported: %s", driverType)
+	}
+}

internal/app/db-wrapper/mssql.go

@@ -0,0 +1,38 @@
+package dbwrapper
+
+import (
+	"context"
+	"database/sql"
+)
+
+type mssqlDbWrapper struct {
+	db *sql.DB
+}
+
+func (wrapper *mssqlDbWrapper) Connect(ctx context.Context, dbUrl string) error { return nil }
+
+func (wrapper *mssqlDbWrapper) Close() error { return nil }
+
+func (wrapper *mssqlDbWrapper) Exec(ctx context.Context, query string, args ...any) (ExecResult, error) {
+	result, execErr := wrapper.db.ExecContext(ctx, query, args...)
+	if execErr != nil {
+		return ExecResult{}, execErr
+	}
+
+	affectedRows, err := result.RowsAffected()
+	if err != nil {
+		return ExecResult{}, err
+	}
+
+	return ExecResult{
+		AffectedRows: affectedRows,
+	}, nil
+}
+
+func (wrapper *mssqlDbWrapper) Query(ctx context.Context, query string, args ...any) (RowsResult, error) {
+	return nil, nil
+}
+
+func (wrapper *mssqlDbWrapper) SaveMassive(ctx context.Context, schema string, table string, columnNames []string, rows [][]any) (int64, error) {
+	return 0, nil
+}

internal/app/db-wrapper/postgres.go

@@ -0,0 +1,34 @@
+package dbwrapper
+
+import (
+	"context"
+
+	"github.com/jackc/pgx/v5/pgxpool"
+)
+
+type postgresDbWrapper struct {
+	db *pgxpool.Pool
+}
+
+func (wrapper *postgresDbWrapper) Connect(ctx context.Context, dbUrl string) error { return nil }
+
+func (wrapper *postgresDbWrapper) Close() error { return nil }
+
+func (wrapper *postgresDbWrapper) Exec(ctx context.Context, query string, args ...any) (ExecResult, error) {
+	result, err := wrapper.db.Exec(ctx, query, args...)
+	if err != nil {
+		return ExecResult{}, err
+	}
+
+	return ExecResult{
+		AffectedRows: result.RowsAffected(),
+	}, nil
+}
+
+func (wrapper *postgresDbWrapper) Query(ctx context.Context, query string, args ...any) (RowsResult, error) {
+	return nil, nil
+}
+
+func (wrapper *postgresDbWrapper) SaveMassive(ctx context.Context, schema string, table string, columnNames []string, rows [][]any) (int64, error) {
+	return 0, nil
+}

internal/app/db-wrapper/types.go

@@ -0,0 +1,25 @@
+package dbwrapper
+
+import (
+	"context"
+)
+
+type ExecResult struct {
+	AffectedRows int64
+}
+
+type RowsResult interface {
+	Close()
+	Err() error
+	Next() bool
+	Values() ([]any, error)
+	Columns() ([]string, error)
+}
+
+type DbWrapper interface {
+	Connect(ctx context.Context, dbUrl string) error
+	Close() error
+	Exec(ctx context.Context, query string, args ...any) (ExecResult, error)
+	Query(ctx context.Context, query string, args ...any) (RowsResult, error)
+	SaveMassive(ctx context.Context, schema string, table string, columnNames []string, rows [][]any) (int64, error)
+}