mirror of
https://github.com/dnote/dnote
synced 2026-03-15 15:05:51 +01:00
134 lines
3.1 KiB
Go
134 lines
3.1 KiB
Go
/* Copyright (C) 2019, 2020, 2021, 2022, 2023 Monomax Software Pty Ltd
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*
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* This file is part of Dnote.
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*
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* Dnote is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Dnote is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Dnote. If not, see <https://www.gnu.org/licenses/>.
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*/
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package database
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import (
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"database/sql"
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"github.com/pkg/errors"
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// use sqlite
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_ "github.com/mattn/go-sqlite3"
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)
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// SQLCommon is the minimal interface required by a db connection
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type SQLCommon interface {
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Exec(query string, args ...interface{}) (sql.Result, error)
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Prepare(query string) (*sql.Stmt, error)
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Query(query string, args ...interface{}) (*sql.Rows, error)
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QueryRow(query string, args ...interface{}) *sql.Row
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}
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// sqlDb is an interface implemented by *sql.DB
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type sqlDb interface {
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Begin() (*sql.Tx, error)
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}
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// sqlTx is an interface implemented by *sql.Tx
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type sqlTx interface {
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Commit() error
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Rollback() error
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}
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// DB contains information about the current database connection
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type DB struct {
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Conn SQLCommon
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Filepath string
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}
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// Begin begins a transaction
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func (d *DB) Begin() (*DB, error) {
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if db, ok := d.Conn.(sqlDb); ok && db != nil {
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tx, err := db.Begin()
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if err != nil {
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return nil, err
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}
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return &DB{Conn: tx}, nil
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}
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return nil, errors.New("can't start transaction")
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}
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// Commit commits a transaction
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func (d *DB) Commit() error {
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if db, ok := d.Conn.(sqlTx); ok && db != nil {
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return db.Commit()
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}
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return errors.New("invalid transaction")
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}
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// Rollback rolls back a transaction
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func (d *DB) Rollback() error {
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if db, ok := d.Conn.(sqlTx); ok && db != nil {
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if err := db.Rollback(); err != nil {
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return err
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}
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}
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return errors.New("invalid transaction")
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}
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// Exec executes a sql
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func (d *DB) Exec(query string, values ...interface{}) (sql.Result, error) {
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return d.Conn.Exec(query, values...)
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}
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// Prepare prepares a sql
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func (d *DB) Prepare(query string) (*sql.Stmt, error) {
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return d.Conn.Prepare(query)
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}
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// Query queries rows
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func (d *DB) Query(query string, values ...interface{}) (*sql.Rows, error) {
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return d.Conn.Query(query, values...)
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}
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// QueryRow queries a row
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func (d *DB) QueryRow(query string, values ...interface{}) *sql.Row {
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return d.Conn.QueryRow(query, values...)
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}
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type closer interface {
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Close() error
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}
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// Close closes a db connection
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func (d *DB) Close() error {
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if db, ok := d.Conn.(closer); ok {
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return db.Close()
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}
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return errors.New("can't close db")
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}
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// Open initializes a new connection to the sqlite database
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func Open(dbPath string) (*DB, error) {
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dbConn, err := sql.Open("sqlite3", dbPath)
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if err != nil {
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return nil, errors.Wrap(err, "opening db connection")
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}
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db := &DB{
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Conn: dbConn,
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Filepath: dbPath,
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}
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return db, nil
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}
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