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// SPDX-FileCopyrightText: Copyright The Miniflux Authors. All rights reserved.
// SPDX-License-Identifier: Apache-2.0
package database // import "miniflux.app/v2/internal/database"
import (
"database/sql"
"fmt"
"time"
// Postgresql driver import
_ "github.com/lib/pq"
)
// NewConnectionPool configures the database connection pool.
func NewConnectionPool(dsn string, minConnections, maxConnections int, connectionLifetime time.Duration) (*sql.DB, error) {
db, err := sql.Open("postgres", dsn)
if err != nil {
return nil, err
}
db.SetMaxOpenConns(maxConnections)
db.SetMaxIdleConns(minConnections)
db.SetConnMaxLifetime(connectionLifetime)
return db, nil
}
// Migrate executes database migrations.
func Migrate(db *sql.DB) error {
var currentVersion int
db.QueryRow(`SELECT version FROM schema_version`).Scan(¤tVersion)
fmt.Println("-> Current schema version:", currentVersion)
fmt.Println("-> Latest schema version:", schemaVersion)
for version := currentVersion; version < schemaVersion; version++ {
newVersion := version + 1
fmt.Println("* Migrating to version:", newVersion)
tx, err := db.Begin()
if err != nil {
return fmt.Errorf("[Migration v%d] %v", newVersion, err)
}
if err := migrations[version](tx); err != nil {
tx.Rollback()
return fmt.Errorf("[Migration v%d] %v", newVersion, err)
}
if _, err := tx.Exec(`DELETE FROM schema_version`); err != nil {
tx.Rollback()
return fmt.Errorf("[Migration v%d] %v", newVersion, err)
}
if _, err := tx.Exec(`INSERT INTO schema_version (version) VALUES ($1)`, newVersion); err != nil {
tx.Rollback()
return fmt.Errorf("[Migration v%d] %v", newVersion, err)
}
if err := tx.Commit(); err != nil {
return fmt.Errorf("[Migration v%d] %v", newVersion, err)
}
}
return nil
}
// IsSchemaUpToDate checks if the database schema is up to date.
func IsSchemaUpToDate(db *sql.DB) error {
var currentVersion int
db.QueryRow(`SELECT version FROM schema_version`).Scan(¤tVersion)
if currentVersion < schemaVersion {
return fmt.Errorf(`the database schema is not up to date: current=v%d expected=v%d`, currentVersion, schemaVersion)
}
return nil
}
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