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|
package eduvpn
import (
"errors"
"github.com/jwijenbergh/eduvpn-common/internal"
)
type VPNState struct {
// The chosen server
Servers internal.Servers `json:"servers"`
// The list of servers and organizations from disco
Discovery internal.Discovery `json:"-"`
// The fsm
FSM internal.FSM `json:"-"`
// The logger
Logger internal.FileLogger `json:"-"`
// The config
Config internal.Config `json:"-"`
// Whether to enable debugging
Debug bool `json:"-"`
}
var VPNStateInstance *VPNState
func GetVPNState() *VPNState {
if VPNStateInstance == nil {
VPNStateInstance = &VPNState{}
}
return VPNStateInstance
}
func (state *VPNState) Register(name string, directory string, stateCallback func(string, string, string), debug bool) error {
if !state.FSM.InState(internal.DEREGISTERED) {
return errors.New("app already registered")
}
// Initialize the logger
logLevel := internal.LOG_WARNING
if debug {
logLevel = internal.LOG_INFO
}
loggerErr := state.Logger.Init(logLevel, name, directory)
if loggerErr != nil {
return errors.New("Failed to create a logger")
}
// Initialize the FSM
state.FSM.Init(stateCallback, &state.Logger, debug)
state.Debug = debug
// Initialize the Config
state.Config.Init(name, directory)
// Initialize Discovery
state.Discovery.Init(&state.FSM, &state.Logger)
// Try to load the previous configuration
if state.Config.Load(&state) != nil {
// This error can be safely ignored, as when the config does not load, the struct will not be filled
state.Logger.Log(internal.LOG_INFO, "Previous configuration not found")
}
state.FSM.GoTransition(internal.NO_SERVER)
return nil
}
func (state *VPNState) Deregister() error {
// Close the log file
state.Logger.Close()
// Save the config
state.Config.Save(&state)
// Empty out fsm
state.FSM = internal.FSM{}
return nil
}
func (state *VPNState) Connect(url string) (string, error) {
if state.FSM.InState(internal.DEREGISTERED) {
return "", errors.New("app not registered")
}
// New server chosen, ensure the server is fresh
server, serverErr := state.Servers.EnsureServer(url, &state.FSM, &state.Logger)
if serverErr != nil {
return "", serverErr
}
// Make sure we are in the chosen state if available
state.FSM.GoTransition(internal.CHOSEN_SERVER)
// Relogin with oauth
// This moves the state to authenticated
if server.NeedsRelogin() {
loginErr := server.Login()
if loginErr != nil {
return "", loginErr
}
} else { // OAuth was valid, ensure we are in the authenticated state
state.FSM.GoTransition(internal.AUTHENTICATED)
}
state.FSM.GoTransition(internal.REQUEST_CONFIG)
config, configErr := server.GetConfig()
if configErr != nil {
return "", configErr
} else {
state.FSM.GoTransition(internal.HAS_CONFIG)
}
return config, nil
}
func (state *VPNState) GetDiscoOrganizations() (string, error) {
if state.FSM.InState(internal.DEREGISTERED) {
return "", errors.New("app not registered")
}
return state.Discovery.GetOrganizationsList()
}
func (state *VPNState) GetDiscoServers() (string, error) {
if state.FSM.InState(internal.DEREGISTERED) {
return "", errors.New("app not registered")
}
return state.Discovery.GetServersList()
}
func (state *VPNState) SetProfileID(profileID string) error {
if !state.FSM.InState(internal.ASK_PROFILE) {
return errors.New("Invalid state for setting a profile")
}
server, serverErr := state.Servers.GetCurrentServer()
if serverErr != nil {
return errors.New("No server found for setting a profile ID")
}
server.Profiles.Current = profileID
return nil
}
|
