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tailscale-android/android/src/main/java/com/tailscale/ipn/ui/viewModel/IpnViewModel.kt

135 lines
5.0 KiB
Kotlin

// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
package com.tailscale.ipn.ui.viewModel
import android.util.Log
import androidx.lifecycle.ViewModel
import androidx.lifecycle.viewModelScope
import com.tailscale.ipn.mdm.MDMSettings
import com.tailscale.ipn.ui.localapi.Client
import com.tailscale.ipn.ui.model.Ipn
import com.tailscale.ipn.ui.model.IpnLocal
import com.tailscale.ipn.ui.notifier.Notifier
import com.tailscale.ipn.ui.util.set
import kotlinx.coroutines.flow.MutableStateFlow
import kotlinx.coroutines.flow.StateFlow
import kotlinx.coroutines.launch
/**
* Base model for most models in this application. Provides common facilities for watching IPN
* notifications, managing login/logout, updating preferences, etc.
*/
open class IpnViewModel : ViewModel() {
companion object {
val mdmSettings: StateFlow<MDMSettings> = MutableStateFlow(MDMSettings())
}
protected val TAG = this::class.simpleName
val loggedInUser: StateFlow<IpnLocal.LoginProfile?> = MutableStateFlow(null)
val loginProfiles: StateFlow<List<IpnLocal.LoginProfile>?> = MutableStateFlow(null)
init {
viewModelScope.launch {
Notifier.state.collect {
// Refresh the user profiles if we're transitioning out of the
// NeedsLogin state.
if (it == Ipn.State.NeedsLogin) {
viewModelScope.launch { loadUserProfiles() }
}
}
}
viewModelScope.launch { loadUserProfiles() }
Log.d(TAG, "Created")
}
private fun loadUserProfiles() {
Client(viewModelScope).profiles { result ->
result.onSuccess(loginProfiles::set).onFailure {
Log.e(TAG, "Error loading profiles: ${it.message}")
}
}
Client(viewModelScope).currentProfile { result ->
result.onSuccess(loggedInUser::set).onFailure {
Log.e(TAG, "Error loading current profile: ${it.message}")
}
}
}
fun login() {
Client(viewModelScope).startLoginInteractive { result ->
result.onSuccess {
Log.d(TAG, "Login started: $it")
}.onFailure {
Log.e(TAG, "Error starting login: ${it.message}")
}
}
}
fun logout() {
Client(viewModelScope).logout { result ->
result.onSuccess {
Log.d(TAG, "Logout started: $it")
}.onFailure {
Log.e(TAG, "Error starting logout: ${it.message}")
}
}
}
// The below handle all types of preference modifications typically invoked by the UI.
// Callers generally shouldn't care about the returned prefs value - the source of
// truth is the IPNModel, who's prefs flow will change in value to reflect the true
// value of the pref setting in the back end (and will match the value returned here).
// Generally, you will want to inspect the returned value in the callback for errors
// to indicate why a particular setting did not change in the interface.
//
// Usage:
// - User/Interface changed to new value. Render the new value.
// - Submit the new value to the PrefsEditor
// - Observe the prefs on the IpnModel and update the UI when/if the value changes.
// For a typical flow, the changed value should reflect the value already shown.
// - Inform the user of any error which may have occurred
//
// The "toggle' functions here will attempt to set the pref value to the inverse of
// what is currently known in the IpnModel.prefs. If IpnModel.prefs is not available,
// the callback will be called with a NO_PREFS error
fun setWantRunning(wantRunning: Boolean, callback: (Result<Ipn.Prefs>) -> Unit) {
Ipn.MaskedPrefs().WantRunning = wantRunning
Client(viewModelScope).editPrefs(Ipn.MaskedPrefs(), callback)
}
fun toggleCorpDNS(callback: (Result<Ipn.Prefs>) -> Unit) {
val prefs = Notifier.prefs.value ?: run {
callback(Result.failure(Exception("no prefs")))
return@toggleCorpDNS
}
val prefsOut = Ipn.MaskedPrefs()
prefsOut.CorpDNS = !prefs.CorpDNS
Client(viewModelScope).editPrefs(prefsOut, callback)
}
fun toggleShieldsUp(callback: (Result<Ipn.Prefs>) -> Unit) {
val prefs = Notifier.prefs.value ?: run {
callback(Result.failure(Exception("no prefs")))
return@toggleShieldsUp
}
val prefsOut = Ipn.MaskedPrefs()
prefsOut.ShieldsUp = !prefs.ShieldsUp
Client(viewModelScope).editPrefs(prefsOut, callback)
}
fun toggleRouteAll(callback: (Result<Ipn.Prefs>) -> Unit) {
val prefs = Notifier.prefs.value ?: run {
callback(Result.failure(Exception("no prefs")))
return@toggleRouteAll
}
val prefsOut = Ipn.MaskedPrefs()
prefsOut.RouteAll = !prefs.RouteAll
Client(viewModelScope).editPrefs(prefsOut, callback)
}
}