mirror of
https://github.com/cgrates/cgrates.git
synced 2026-02-11 10:06:24 +05:00
120 lines
3.7 KiB
Go
120 lines
3.7 KiB
Go
/*
|
|
Real-time Online/Offline Charging System (OCS) for Telecom & ISP environments
|
|
Copyright (C) ITsysCOM GmbH
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU Affero 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 Affero General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Affero General Public License
|
|
along with this program. If not, see <https://www.gnu.org/licenses/>
|
|
*/
|
|
|
|
package config
|
|
|
|
import (
|
|
"fmt"
|
|
"strconv"
|
|
"strings"
|
|
|
|
"github.com/antchfx/xmlquery"
|
|
"github.com/cgrates/cgrates/utils"
|
|
)
|
|
|
|
// NewXMLProvider constructs a utils.DataProvider
|
|
func NewXMLProvider(req *xmlquery.Node, cdrPath utils.HierarchyPath) (dP utils.DataProvider) {
|
|
dP = &XMLProvider{
|
|
req: req,
|
|
cdrPath: cdrPath,
|
|
cache: utils.MapStorage{},
|
|
}
|
|
return
|
|
}
|
|
|
|
// XmlProvider implements engine.utils.DataProvider, allowing it to be passed to filters.
|
|
// An instance of XmlProvider is created for each element retrieved from xmlquery.QueryAll.
|
|
type XMLProvider struct {
|
|
|
|
// req is the root node of each individual XML element retrieved.
|
|
// It acts as the starting point for extracting data from the XML element.
|
|
req *xmlquery.Node
|
|
|
|
// cdrPath is the root path used to calculate the relative path.
|
|
// The relative path is computed by trimming cdrPath from the full path of the XML element.
|
|
cdrPath utils.HierarchyPath
|
|
|
|
// cache stores the inner text of XML elements.
|
|
// The key is the relative path of the XML element.
|
|
cache utils.MapStorage
|
|
}
|
|
|
|
// String is part of engine.utils.DataProvider interface
|
|
// when called, it will display the already parsed values out of cache
|
|
func (xP *XMLProvider) String() string {
|
|
return xP.cache.String()
|
|
}
|
|
|
|
// FieldAsInterface is part of engine.utils.DataProvider interface
|
|
func (xP *XMLProvider) FieldAsInterface(fldPath []string) (data any, err error) {
|
|
if len(fldPath) == 0 {
|
|
return nil, utils.ErrNotFound
|
|
}
|
|
if data, err = xP.cache.FieldAsInterface(fldPath); err == nil ||
|
|
err != utils.ErrNotFound { // item found in cache
|
|
return
|
|
}
|
|
err = nil // cancel previous err
|
|
relPath := utils.HierarchyPath(fldPath[len(xP.cdrPath):])
|
|
var slctrStr string
|
|
for i := range relPath {
|
|
if sIdx := strings.Index(relPath[i], "["); sIdx != -1 {
|
|
slctrStr = relPath[i][sIdx:]
|
|
if slctrStr[len(slctrStr)-1] != ']' {
|
|
return nil, fmt.Errorf("filter rule <%s> needs to end in ]", slctrStr)
|
|
}
|
|
relPath[i] = relPath[i][:sIdx]
|
|
if slctrStr[1] != '@' {
|
|
i, err := strconv.Atoi(slctrStr[1 : len(slctrStr)-1])
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
slctrStr = "[" + strconv.Itoa(i+1) + "]"
|
|
}
|
|
relPath[i] = relPath[i] + slctrStr
|
|
}
|
|
}
|
|
data, err = ElementText(xP.req, relPath.AsString("/", false))
|
|
xP.cache.Set(fldPath, data)
|
|
return
|
|
}
|
|
|
|
// FieldAsString is part of engine.utils.DataProvider interface
|
|
func (xP *XMLProvider) FieldAsString(fldPath []string) (data string, err error) {
|
|
var valIface any
|
|
valIface, err = xP.FieldAsInterface(fldPath)
|
|
if err != nil {
|
|
return
|
|
}
|
|
return utils.IfaceAsString(valIface), nil
|
|
}
|
|
|
|
// ElementText will process the node to extract the elementName's text out of it (only first one found)
|
|
// returns utils.ErrNotFound if the element is not found in the node
|
|
// Make the method exportable until we remove the ers
|
|
func ElementText(xmlElement *xmlquery.Node, elmntPath string) (string, error) {
|
|
elmnt, err := xmlquery.Query(xmlElement, elmntPath)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
if elmnt == nil {
|
|
return "", utils.ErrNotFound
|
|
}
|
|
return elmnt.InnerText(), nil
|
|
}
|