yans/internal/backend/sqlite/sqlite.go
2022-01-21 00:29:58 +03:00

86 lines
2.3 KiB
Go

package sqlite
import (
"database/sql"
"embed"
"github.com/ChronosX88/yans/internal/config"
"github.com/ChronosX88/yans/internal/models"
"github.com/ChronosX88/yans/internal/utils"
"github.com/dlclark/regexp2"
"github.com/jmoiron/sqlx"
"github.com/mattn/go-sqlite3"
_ "github.com/mattn/go-sqlite3"
"github.com/pressly/goose/v3"
)
//go:embed migrations/*.sql
var migrations embed.FS
type SQLiteBackend struct {
db *sqlx.DB
}
func regexHelper(re, s string) (bool, error) {
return regexp2.MustCompile(re, regexp2.None).MatchString(s)
}
func NewSQLiteBackend(cfg config.SQLiteBackendConfig) (*SQLiteBackend, error) {
sql.Register("sqlite3_with_regexp",
&sqlite3.SQLiteDriver{
ConnectHook: func(conn *sqlite3.SQLiteConn) error {
return conn.RegisterFunc("regexp", regexHelper, true)
},
})
db, err := sqlx.Open("sqlite3_with_regexp", cfg.Path)
if err != nil {
return nil, err
}
goose.SetBaseFS(migrations)
if err := goose.SetDialect("sqlite3"); err != nil {
return nil, err
}
if err := goose.Up(db.DB, "migrations"); err != nil {
return nil, err
}
return &SQLiteBackend{
db: db,
}, nil
}
func (sb *SQLiteBackend) ListGroups() ([]models.Group, error) {
var groups []models.Group
return groups, sb.db.Select(&groups, "SELECT * FROM groups")
}
func (sb *SQLiteBackend) ListGroupsByPattern(pattern string) ([]models.Group, error) {
var groups []models.Group
w, err := utils.ParseWildmat(pattern)
if err != nil {
return nil, err
}
r, err := w.ToRegex()
if err != nil {
return nil, err
}
return groups, sb.db.Select(&groups, "SELECT * FROM groups WHERE group_name REGEXP ?", r.String())
}
func (sb *SQLiteBackend) GetArticlesCount(g models.Group) (int, error) {
var count int
return count, sb.db.Get(&count, "SELECT COUNT(*) FROM articles_to_groups WHERE group_id = ?", g.ID)
}
func (sb *SQLiteBackend) GetGroupHighWaterMark(g models.Group) (int, error) {
var waterMark int
return waterMark, sb.db.Get(&waterMark, "SELECT article_id FROM articles_to_groups WHERE group_id = ? ORDER BY article_id DESC LIMIT 1", g.ID)
}
func (sb *SQLiteBackend) GetGroupLowWaterMark(g models.Group) (int, error) {
var waterMark int
return waterMark, sb.db.Get(&waterMark, "SELECT article_id FROM articles_to_groups WHERE group_id = ? ORDER BY article_id LIMIT 1", g.ID)
}