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dbclient.go
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dbclient.go
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/*
*
* Copyright 2023 puzzleweaver authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package dbclient
import (
"errors"
"strings"
"github.com/uptrace/opentelemetry-go-extra/otelgorm"
"gorm.io/driver/clickhouse"
"gorm.io/driver/mysql"
"gorm.io/driver/postgres"
"gorm.io/driver/sqlserver"
"gorm.io/gorm"
)
var errUnknownKind = errors.New("Unknown database type")
func New(kind string, address string) (*gorm.DB, error) {
kind = strings.ToLower(kind)
var dialector gorm.Dialector
switch kind {
case "postgres":
dialector = postgres.Open(address)
case "mysql":
dialector = mysql.Open(address)
case "sqlserver":
dialector = sqlserver.Open(address)
case "clickhouse":
dialector = clickhouse.Open(address)
default:
return nil, errUnknownKind
}
db, err := gorm.Open(dialector)
if err != nil {
return nil, err
}
err = db.Use(otelgorm.NewPlugin(otelgorm.WithDBName(kind)))
return db, err
}
func Paginate(db *gorm.DB, start uint64, end uint64) *gorm.DB {
return db.Offset(int(start)).Limit(int(end - start))
}
func BuildLikeFilter(filter string) string {
filter = strings.ReplaceAll(filter, ".*", "%")
var likeBuilder strings.Builder
if strings.IndexByte(filter, '%') != 0 {
likeBuilder.WriteByte('%')
}
likeBuilder.WriteString(filter)
if strings.LastIndexByte(filter, '%') != len(filter)-1 {
likeBuilder.WriteByte('%')
}
return likeBuilder.String()
}