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package agent
import (
"fmt"
"io/ioutil"
"os"
"strings"
"github.com/iotbzh/xds-agent/lib/apiv1"
common "github.com/iotbzh/xds-common/golib"
)
// IPROJECT interface implementation for native/path mapping projects
// PathMap .
type PathMap struct {
*Context
server *XdsServer
folder *XdsFolderConfig
}
// NewProjectPathMap Create a new instance of PathMap
func NewProjectPathMap(ctx *Context, svr *XdsServer) *PathMap {
p := PathMap{
Context: ctx,
server: svr,
folder: &XdsFolderConfig{},
}
return &p
}
// Add a new project
func (p *PathMap) Add(cfg apiv1.ProjectConfig) (*apiv1.ProjectConfig, error) {
var err error
var file *os.File
errMsg := "ClientPath sanity check error (%d): %v"
// Sanity check to verify that we have RW permission and path-mapping is correct
dir := cfg.ClientPath
if !common.Exists(dir) {
// try to create if not existing
if err := os.MkdirAll(dir, 0755); err != nil {
return nil, fmt.Errorf("Cannot create ClientPath directory: %s", dir)
}
}
if !common.Exists(dir) {
return nil, fmt.Errorf("ClientPath directory is not accessible: %s", dir)
}
if file, err = ioutil.TempFile(dir, ".xds_pathmap_check"); err != nil {
return nil, fmt.Errorf(errMsg, 1, err)
}
// Write a specific message that will be check by server during folder add
msg := "Pathmap checked message written by xds-agent ID: " + p.Config.AgentUID + "\n"
if n, err := file.WriteString(msg); n != len(msg) || err != nil {
return nil, fmt.Errorf(errMsg, 2, err)
}
defer func() {
if file != nil {
os.Remove(file.Name())
file.Close()
}
}()
// Convert to Xds folder
fld := p.server.ProjectToFolder(cfg)
fld.DataPathMap.CheckFile = file.Name()
fld.DataPathMap.CheckContent = msg
// Send request to create folder on XDS server side
err = p.server.FolderAdd(fld, p.folder)
if err != nil {
return nil, fmt.Errorf("Folders mapping verification failure.\n%v", err)
}
// 2nd part of sanity checker
// check specific message added by XDS Server during folder add processing
content, err := ioutil.ReadFile(file.Name())
if err != nil {
return nil, fmt.Errorf(errMsg, 3, err)
}
if !strings.Contains(string(content),
"Pathmap checked message written by xds-server ID") {
return nil, fmt.Errorf(errMsg, 4, "file content differ")
}
return p.GetProject(), nil
}
// Delete a project
func (p *PathMap) Delete() error {
return p.server.FolderDelete(p.folder.ID)
}
// GetProject Get public part of project config
func (p *PathMap) GetProject() *apiv1.ProjectConfig {
prj := p.server.FolderToProject(*p.folder)
prj.ServerID = p.server.ID
return &prj
}
// UpdateProject Set project config
func (p *PathMap) UpdateProject(prj apiv1.ProjectConfig) (*apiv1.ProjectConfig, error) {
p.folder = p.server.ProjectToFolder(prj)
np := p.GetProject()
if err := p.events.Emit(apiv1.EVTProjectChange, np); err != nil {
return np, err
}
return np, nil
}
// GetServer Get the XdsServer that holds this project
func (p *PathMap) GetServer() *XdsServer {
return p.server
}
// Sync Force project files synchronization
func (p *PathMap) Sync() error {
return nil
}
// IsInSync Check if project files are in-sync
func (p *PathMap) IsInSync() (bool, error) {
return true, nil
}
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