chore: refactor code

- remove legacy code
- refactor search and add tests

internal/db/db_legacy.go

@@ -1,106 +0,0 @@
-// ALR - Any Linux Repository
-// Copyright (C) 2025 Евгений Храмов
-//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-package db
-
-import (
-	"context"
-	"log/slog"
-	"os"
-	"sync"
-
-	"github.com/jmoiron/sqlx"
-	"github.com/leonelquinteros/gotext"
-
-	"gitea.plemya-x.ru/Plemya-x/ALR/internal/config"
-)
-
-// DB returns the ALR database.
-// The first time it's called, it opens the SQLite database file.
-// Subsequent calls return the same connection.
-//
-// Deprecated: use struct method
-func DB(ctx context.Context) *sqlx.DB {
-	return GetInstance(ctx).GetConn()
-}
-
-// Close closes the database
-//
-// Deprecated: use struct method
-func Close() error {
-	if database != nil {
-		return database.Close()
-	}
-	return nil
-}
-
-// IsEmpty returns true if the database has no packages in it, otherwise it returns false.
-//
-// Deprecated: use struct method
-func IsEmpty(ctx context.Context) bool {
-	return GetInstance(ctx).IsEmpty(ctx)
-}
-
-// InsertPackage adds a package to the database
-//
-// Deprecated: use struct method
-func InsertPackage(ctx context.Context, pkg Package) error {
-	return GetInstance(ctx).InsertPackage(ctx, pkg)
-}
-
-// GetPkgs returns a result containing packages that match the where conditions
-//
-// Deprecated: use struct method
-func GetPkgs(ctx context.Context, where string, args ...any) (*sqlx.Rows, error) {
-	return GetInstance(ctx).GetPkgs(ctx, where, args...)
-}
-
-// GetPkg returns a single package that matches the where conditions
-//
-// Deprecated: use struct method
-func GetPkg(ctx context.Context, where string, args ...any) (*Package, error) {
-	return GetInstance(ctx).GetPkg(ctx, where, args...)
-}
-
-// DeletePkgs deletes all packages matching the where conditions
-//
-// Deprecated: use struct method
-func DeletePkgs(ctx context.Context, where string, args ...any) error {
-	return GetInstance(ctx).DeletePkgs(ctx, where, args...)
-}
-
-// =======================
-// FOR LEGACY ONLY
-// =======================
-
-var (
-	dbOnce   sync.Once
-	database *Database
-)
-
-// Deprecated: For legacy only
-func GetInstance(ctx context.Context) *Database {
-	dbOnce.Do(func() {
-		cfg := config.GetInstance(ctx)
-		database = New(cfg)
-		err := database.Init(ctx)
-		if err != nil {
-			slog.Error(gotext.Get("Error opening database"), "err", err)
-			os.Exit(1)
-		}
-	})
-	return database
-}