Coverage / app/src/main/java/io/oxygenhub/android/auth/SessionManager.kt 100.0%
44 of 44 lines run, 13 of 13 functions, 10 of 14 branches · run #1647 on main · run missed
| 1 | package io.oxygenhub.android.auth | |
| 2 | ||
| 3 | import io.oxygenhub.android.api.HubApi | |
| 4 | import io.oxygenhub.android.api.HubException | |
| 5 | import kotlinx.coroutines.flow.MutableStateFlow | |
| 6 | import kotlinx.coroutines.flow.StateFlow | |
| 7 | import kotlinx.coroutines.flow.asStateFlow | |
| 8 | ||
| 9 | /** What signing out did on the hub. */ | |
| 10 | enum class SignOutResult { | |
| 11 | /** The token is revoked on the hub. */ | |
| 12 | Revoked, | |
| 13 | ||
| 14 | /** The hub no longer knew the token (revoked or expired already). */ | |
| 15 | AlreadyGone, | |
| 16 | ||
| 17 | /** Signed out here, but the hub could not be told: revoke it under Settings, Tokens. */ | |
| 18 | NotRevoked, | |
| 19 | } | |
| 20 | ||
| 21 | /** | |
| 22 | * The app's one session: who is signed in, the API client for them, and | |
| 23 | * signing in and out. [apiFactory] makes the client for a session; it is | |
| 24 | * given a callback to run when the hub refuses the token. | |
| 25 | */ | |
| 26 | class SessionManager( | |
| 27 | private val store: SessionStore, | |
| 28 | private val apiFactory: (Session, onUnauthorized: () -> Unit) -> HubApi, | |
| 29 | ) { | |
| 30 | private val _session = MutableStateFlow(store.load()) | |
| 31 | val session: StateFlow<Session?> = _session.asStateFlow() | |
| 32 | ||
| 33 | /** Why the last session ended without the user signing out, for the sign-in screen to say. */ | |
| 34 | private val _ended = MutableStateFlow<String?>(null) | |
| 35 | val ended: StateFlow<String?> = _ended.asStateFlow() | |
| 36 | ||
| 37 | private var api: Pair<Session, HubApi>? = null | |
| 38 | ||
| 39 | val lastHub: String? get() = store.lastHub | |
| 40 | ||
| 41 | /** The client for the signed-in session, or null when signed out. */ | |
| 42 | fun api(): HubApi? { | |
| 43 | val s = _session.value ?: return null | |
| 44 | api?.let { (owner, client) -> if (owner == s) return client } | |
| 45 | return apiFactory(s) { expired(s) }.also { api = s to it } | |
| 46 | } | |
| 47 | ||
| 48 | fun signedIn(session: Session) { | |
| 49 | store.save(session) | |
| 50 | _ended.value = null | |
| 51 | _session.value = session | |
| 52 | } | |
| 53 | ||
| 54 | fun rememberHub(hub: String) { | |
| 55 | store.lastHub = hub | |
| 56 | } | |
| 57 | ||
| 58 | /** Revokes the token on the hub, then forgets it here whatever the hub said. */ | |
| 59 | suspend fun signOut(): SignOutResult { | |
| 60 | val client = api() | |
| 61 | val result = when { | |
| 62 | client == null -> SignOutResult.AlreadyGone | |
| 63 | else -> try { | |
| 64 | client.revokeToken() | |
| 65 | SignOutResult.Revoked | |
| 66 | } catch (e: HubException.Http) { | |
| 67 | if (e.status == 401) SignOutResult.AlreadyGone else SignOutResult.NotRevoked | |
| 68 | } catch (_: HubException) { | |
| 69 | SignOutResult.NotRevoked | |
| 70 | } | |
| 71 | } | |
| 72 | forget() | |
| 73 | if (result == SignOutResult.NotRevoked) { | |
| 74 | _ended.value = "Signed out here, but the hub couldn't be reached to revoke the token. " + | |
| 75 | "Revoke it on the hub under Settings, Tokens." | |
| 76 | } | |
| 77 | return result | |
| 78 | } | |
| 79 | ||
| 80 | /** The hub refused the token: forget it and ask for a new sign-in. */ | |
| 81 | private fun expired(session: Session) { | |
| 82 | if (_session.value != session) return | |
| 83 | forget() | |
| 84 | _ended.value = "Your sign-in to ${session.hub} has ended (the token was revoked or not used for 90 days). Sign in again." | |
| 85 | } | |
| 86 | ||
| 87 | private fun forget() { | |
| 88 | store.clear() | |
| 89 | api = null | |
| 90 | _session.value = null | |
| 91 | } | |
| 92 | ||
| 93 | fun dismissEnded() { | |
| 94 | _ended.value = null | |
| 95 | } | |
| 96 | } |