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circularfile.go
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/
circularfile.go
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package users
import (
"strings"
"sync"
"github.com/goccy/go-json"
"github.com/pkg/errors"
"github.com/qlik-oss/gopherciser/helpers"
)
type (
CircularUsersFileCore struct {
Filename helpers.RowFile `json:"filename" displayname:"Filename" displayelement:"file"`
Password helpers.Password `json:"password,omitempty" displayname:"Password"`
Directory string `json:"directory,omitempty" displayname:"User directory"`
}
CircularUsersFile struct {
CircularUsersFileCore
userList []*User
fill sync.Once
}
)
const (
DefaultUserfileSeparator = ";"
)
// NewCircularUsersFromFile populate user list from file
func NewCircularUsersFromFile() *CircularUsersFile {
return &CircularUsersFile{}
}
// UnmarshalJSON CircularUsersFile
func (users *CircularUsersFile) UnmarshalJSON(arg []byte) error {
if err := json.Unmarshal(arg, &users.CircularUsersFileCore); err != nil {
return err
}
if err := users.parseUserList(); err != nil {
return err
}
return nil
}
// Validate CircularUsersFile settings
func (users *CircularUsersFile) Validate() error {
if users.Filename.IsEmpty() {
return errors.Errorf("filename required for mode<%s>", UserGeneratorCircularFile)
}
if len(users.userList) < 1 && len(users.Filename.Rows()) < 1 {
return errors.Errorf("filename<%s> has no user names", users.Filename)
}
return users.parseUserList()
}
// Iterate users from file
func (users *CircularUsersFile) Iterate(iteration uint64) *User {
return users.userList[(iteration-1)%uint64(len(users.userList))]
}
func (users *CircularUsersFile) parseUserList() error {
var errParse error
users.fill.Do(func() {
rows := users.Filename.Rows()
users.userList = make([]*User, 0, len(rows))
for i, row := range rows {
user, err := parseRow(row, users.Directory, users.Password)
if err != nil {
errParse = errors.Wrapf(err, "row:%d<%s> not correctly formated", i+1, row)
return
}
users.userList = append(users.userList, user)
}
users.Filename.PurgeRows()
})
return errParse
}
func parseRow(row, defaultDirectory string, defaultPassword helpers.Password) (*User, error) {
if row == "" {
return nil, errors.New("row is empty")
}
subStrs := strings.SplitN(row, DefaultUserfileSeparator, 3)
user := &User{
UserName: subStrs[0],
}
if len(subStrs) > 1 && len(subStrs[1]) > 0 {
user.Directory = subStrs[1]
} else {
user.Directory = defaultDirectory
}
if len(subStrs) > 2 && len(subStrs[2]) > 0 {
user.Password = helpers.Password(subStrs[2])
} else {
user.Password = defaultPassword
}
return user, nil
}