/
replay_command.go
182 lines (168 loc) · 4.36 KB
/
replay_command.go
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package ssh
import (
"fmt"
"github.com/viant/toolbox"
"io/ioutil"
"os"
"path"
"sort"
"strings"
)
//ReplayCommand represent a replay command
type ReplayCommand struct {
Stdin string
Index int
Stdout []string
Error string
}
//replayCommands represnets command grouped by stdin
type ReplayCommands struct {
Commands map[string]*ReplayCommand
Keys []string
BaseDir string
}
//Register register stdin and corresponding stdout conversation
func (c *ReplayCommands) Register(stdin, stdout string) {
if _, has := c.Commands[stdin]; !has {
c.Commands[stdin] = &ReplayCommand{
Stdin: stdin,
Stdout: make([]string, 0),
}
c.Keys = append(c.Keys, stdin)
}
c.Commands[stdin].Stdout = append(c.Commands[stdin].Stdout, stdout)
}
//return stdout pointed by index and increases index or empty string if exhausted
func (c *ReplayCommands) Next(stdin string) string {
var stdout = c.Commands[stdin].Stdout
var index = c.Commands[stdin].Index
if index < len(stdout) {
c.Commands[stdin].Index++
return stdout[index]
}
return ""
}
func (c *ReplayCommands) Enable(source interface{}) (err error) {
switch value := source.(type) {
case *service:
value.replayCommands = c
value.recordSession = true
case *multiCommandSession:
value.replayCommands = c
value.recordSession = true
default:
err = fmt.Errorf("unsupported type: %T", source)
}
return err
}
func (c *ReplayCommands) Disable(source interface{}) (err error) {
switch value := source.(type) {
case *service:
value.replayCommands = nil
value.recordSession = false
case *multiCommandSession:
value.replayCommands = nil
value.recordSession = false
default:
err = fmt.Errorf("unsupported type: %T", source)
}
return err
}
//Store stores replay command in the base directory
func (c *ReplayCommands) Store() error {
err := toolbox.CreateDirIfNotExist(c.BaseDir)
if err != nil {
return err
}
for i, key := range c.Keys {
var command = c.Commands[key]
var filenamePrefix = path.Join(c.BaseDir, fmt.Sprintf("%03d", i+1))
var stdinFilename = filenamePrefix + "_000.stdin"
err := ioutil.WriteFile(stdinFilename, []byte(command.Stdin), 0644)
if err != nil {
return err
}
for j, stdout := range command.Stdout {
var stdoutFilename = fmt.Sprintf("%v_%03d.stdout", filenamePrefix, j+1)
err := ioutil.WriteFile(stdoutFilename, []byte(stdout), 0644)
if err != nil {
return err
}
}
}
return nil
}
//Load loads replay command from base directory
func (c *ReplayCommands) Load() error {
parent, err := os.Open(c.BaseDir)
if err != nil {
return err
}
files, err := parent.Readdir(1000)
if err != nil {
return err
}
var stdinMap = make(map[string]string)
var stdoutMap = make(map[string]string)
for _, candidate := range files {
ext := path.Ext(candidate.Name())
var contentMap map[string]string
if ext == ".stdin" {
contentMap = stdinMap
} else if ext == ".stdout" {
contentMap = stdoutMap
} else {
continue
}
var filename = path.Join(c.BaseDir, candidate.Name())
content, err := ioutil.ReadFile(filename)
if err != nil {
return nil
}
contentMap[candidate.Name()] = string(content)
}
for key, stdin := range stdinMap {
var prefix = key[:len(key)-10]
var candidateKeys = toolbox.MapKeysToStringSlice(stdoutMap)
sort.Strings(candidateKeys)
for _, candidateKey := range candidateKeys {
if strings.HasPrefix(candidateKey, prefix) {
stdout := stdoutMap[candidateKey]
c.Register(stdin, stdout)
}
}
}
return nil
}
//Shell returns command shell
func (c *ReplayCommands) Shell() string {
for _, candidate := range c.Commands {
if strings.HasPrefix(candidate.Stdin, "PS1=") && len(candidate.Stdout) > 0 {
return candidate.Stdout[0]
}
}
return ""
}
//System returns system name
func (c *ReplayCommands) System() string {
for _, candidate := range c.Commands {
if strings.HasPrefix(candidate.Stdin, "uname -s") && len(candidate.Stdout) > 0 {
return strings.ToLower(candidate.Stdout[0])
}
}
return ""
}
//NewReplayCommands create a new replay commands or error if provided basedir does not exists and can not be created
func NewReplayCommands(basedir string) (*ReplayCommands, error) {
if !toolbox.FileExists(basedir) {
err := os.MkdirAll(basedir, 0744)
if err != nil {
return nil, err
}
}
return &ReplayCommands{
Commands: make(map[string]*ReplayCommand),
Keys: make([]string, 0),
BaseDir: basedir,
}, nil
}