Add cert store option based on sqlite3, mysql & postgres (#173)

Deprecate **pogreb**!

close #169

Reviewed-on: https://codeberg.org/Codeberg/pages-server/pulls/173

server/database/xorm.go

@@ -0,0 +1,121 @@
+package database
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+
+	"github.com/rs/zerolog/log"
+
+	"github.com/go-acme/lego/v4/certificate"
+	"xorm.io/xorm"
+
+	// register sql driver
+	_ "github.com/go-sql-driver/mysql"
+	_ "github.com/lib/pq"
+	_ "github.com/mattn/go-sqlite3"
+)
+
+var _ CertDB = xDB{}
+
+var ErrNotFound = errors.New("entry not found")
+
+type xDB struct {
+	engine *xorm.Engine
+}
+
+func NewXormDB(dbType, dbConn string) (CertDB, error) {
+	if !supportedDriver(dbType) {
+		return nil, fmt.Errorf("not supported db type '%s'", dbType)
+	}
+	if dbConn == "" {
+		return nil, fmt.Errorf("no db connection provided")
+	}
+
+	e, err := xorm.NewEngine(dbType, dbConn)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := e.Sync2(new(Cert)); err != nil {
+		return nil, fmt.Errorf("cound not sync db model :%w", err)
+	}
+
+	return &xDB{
+		engine: e,
+	}, nil
+}
+
+func (x xDB) Close() error {
+	return x.engine.Close()
+}
+
+func (x xDB) Put(domain string, cert *certificate.Resource) error {
+	log.Trace().Str("domain", cert.Domain).Msg("inserting cert to db")
+	c, err := toCert(domain, cert)
+	if err != nil {
+		return err
+	}
+
+	_, err = x.engine.Insert(c)
+	return err
+}
+
+func (x xDB) Get(domain string) (*certificate.Resource, error) {
+	// TODO: do we need this or can we just go with domain name for wildcard cert
+	domain = strings.TrimPrefix(domain, ".")
+
+	cert := new(Cert)
+	log.Trace().Str("domain", domain).Msg("get cert from db")
+	if found, err := x.engine.ID(domain).Get(cert); err != nil {
+		return nil, err
+	} else if !found {
+		return nil, fmt.Errorf("%w: name='%s'", ErrNotFound, domain)
+	}
+	return cert.Raw(), nil
+}
+
+func (x xDB) Delete(domain string) error {
+	log.Trace().Str("domain", domain).Msg("delete cert from db")
+	_, err := x.engine.ID(domain).Delete(new(Cert))
+	return err
+}
+
+func (x xDB) Compact() (string, error) {
+	// not needed
+	return "", nil
+}
+
+// Items return al certs from db, if pageSize is 0 it does not use limit
+func (x xDB) Items(page, pageSize int) ([]*Cert, error) {
+	// paginated return
+	if pageSize > 0 {
+		certs := make([]*Cert, 0, pageSize)
+		if page >= 0 {
+			page = 1
+		}
+		err := x.engine.Limit(pageSize, (page-1)*pageSize).Find(&certs)
+		return certs, err
+	}
+
+	// return all
+	certs := make([]*Cert, 0, 64)
+	err := x.engine.Find(&certs)
+	return certs, err
+}
+
+// Supported database drivers
+const (
+	DriverSqlite   = "sqlite3"
+	DriverMysql    = "mysql"
+	DriverPostgres = "postgres"
+)
+
+func supportedDriver(driver string) bool {
+	switch driver {
+	case DriverMysql, DriverPostgres, DriverSqlite:
+		return true
+	default:
+		return false
+	}
+}