mirror of
https://github.com/dnote/dnote
synced 2026-03-14 22:45:50 +01:00
131 lines
3 KiB
Go
131 lines
3 KiB
Go
/* Copyright 2025 Dnote Authors
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
package database
|
|
|
|
import (
|
|
"database/sql"
|
|
|
|
"github.com/pkg/errors"
|
|
// use sqlite
|
|
_ "github.com/mattn/go-sqlite3"
|
|
)
|
|
|
|
// SQLCommon is the minimal interface required by a db connection
|
|
type SQLCommon interface {
|
|
Exec(query string, args ...interface{}) (sql.Result, error)
|
|
Prepare(query string) (*sql.Stmt, error)
|
|
Query(query string, args ...interface{}) (*sql.Rows, error)
|
|
QueryRow(query string, args ...interface{}) *sql.Row
|
|
}
|
|
|
|
// sqlDb is an interface implemented by *sql.DB
|
|
type sqlDb interface {
|
|
Begin() (*sql.Tx, error)
|
|
}
|
|
|
|
// sqlTx is an interface implemented by *sql.Tx
|
|
type sqlTx interface {
|
|
Commit() error
|
|
Rollback() error
|
|
}
|
|
|
|
// DB contains information about the current database connection
|
|
type DB struct {
|
|
Conn SQLCommon
|
|
Filepath string
|
|
}
|
|
|
|
// Begin begins a transaction
|
|
func (d *DB) Begin() (*DB, error) {
|
|
if db, ok := d.Conn.(sqlDb); ok && db != nil {
|
|
tx, err := db.Begin()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return &DB{Conn: tx}, nil
|
|
}
|
|
|
|
return nil, errors.New("can't start transaction")
|
|
}
|
|
|
|
// Commit commits a transaction
|
|
func (d *DB) Commit() error {
|
|
if db, ok := d.Conn.(sqlTx); ok && db != nil {
|
|
return db.Commit()
|
|
}
|
|
|
|
return errors.New("invalid transaction")
|
|
}
|
|
|
|
// Rollback rolls back a transaction
|
|
func (d *DB) Rollback() error {
|
|
if db, ok := d.Conn.(sqlTx); ok && db != nil {
|
|
if err := db.Rollback(); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
return errors.New("invalid transaction")
|
|
}
|
|
|
|
// Exec executes a sql
|
|
func (d *DB) Exec(query string, values ...interface{}) (sql.Result, error) {
|
|
return d.Conn.Exec(query, values...)
|
|
}
|
|
|
|
// Prepare prepares a sql
|
|
func (d *DB) Prepare(query string) (*sql.Stmt, error) {
|
|
return d.Conn.Prepare(query)
|
|
}
|
|
|
|
// Query queries rows
|
|
func (d *DB) Query(query string, values ...interface{}) (*sql.Rows, error) {
|
|
return d.Conn.Query(query, values...)
|
|
}
|
|
|
|
// QueryRow queries a row
|
|
func (d *DB) QueryRow(query string, values ...interface{}) *sql.Row {
|
|
return d.Conn.QueryRow(query, values...)
|
|
}
|
|
|
|
type closer interface {
|
|
Close() error
|
|
}
|
|
|
|
// Close closes a db connection
|
|
func (d *DB) Close() error {
|
|
if db, ok := d.Conn.(closer); ok {
|
|
return db.Close()
|
|
}
|
|
|
|
return errors.New("can't close db")
|
|
}
|
|
|
|
// Open initializes a new connection to the sqlite database
|
|
func Open(dbPath string) (*DB, error) {
|
|
dbConn, err := sql.Open("sqlite3", dbPath)
|
|
if err != nil {
|
|
return nil, errors.Wrap(err, "opening db connection")
|
|
}
|
|
|
|
db := &DB{
|
|
Conn: dbConn,
|
|
Filepath: dbPath,
|
|
}
|
|
|
|
return db, nil
|
|
}
|