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Refactoring

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This commit is contained in:
Justin Mazzocchi 2020-08-07 14:57:18 -07:00
parent f1ef5def5b
commit 9659085ca6
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GPG key ID: E223E6937AAFB01C
7 changed files with 118 additions and 68 deletions
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6
Metatext.xcodeproj/project.pbxproj
View file

@ -15,6 +15,8 @@
D0091B6F24DD68090040E8D2 /* PreferencesView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D0091B6D24DD68090040E8D2 /* PreferencesView.swift */; };
D0091B7124DD68220040E8D2 /* PreferencesViewModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = D0091B7024DD68220040E8D2 /* PreferencesViewModel.swift */; };
D0091B7224DD68220040E8D2 /* PreferencesViewModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = D0091B7024DD68220040E8D2 /* PreferencesViewModel.swift */; };
D0091B7424DDF4860040E8D2 /* IdentifiedEnvironment.swift in Sources */ = {isa = PBXBuildFile; fileRef = D0091B7324DDF4860040E8D2 /* IdentifiedEnvironment.swift */; };
D0091B7524DDF4860040E8D2 /* IdentifiedEnvironment.swift in Sources */ = {isa = PBXBuildFile; fileRef = D0091B7324DDF4860040E8D2 /* IdentifiedEnvironment.swift */; };
D047FAAE24C3E21200AF17C5 /* MetatextApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = D047FA8524C3E21000AF17C5 /* MetatextApp.swift */; };
D047FAAF24C3E21200AF17C5 /* MetatextApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = D047FA8524C3E21000AF17C5 /* MetatextApp.swift */; };
D047FAB224C3E21200AF17C5 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = D047FA8724C3E21200AF17C5 /* Assets.xcassets */; };
@ -171,6 +173,7 @@
D0091B6A24DC10CE0040E8D2 /* PostingReadingPreferencesViewModel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PostingReadingPreferencesViewModel.swift; sourceTree = "<group>"; };
D0091B6D24DD68090040E8D2 /* PreferencesView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PreferencesView.swift; sourceTree = "<group>"; };
D0091B7024DD68220040E8D2 /* PreferencesViewModel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PreferencesViewModel.swift; sourceTree = "<group>"; };
D0091B7324DDF4860040E8D2 /* IdentifiedEnvironment.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = IdentifiedEnvironment.swift; sourceTree = "<group>"; };
D047FA8524C3E21000AF17C5 /* MetatextApp.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MetatextApp.swift; sourceTree = "<group>"; };
D047FA8724C3E21200AF17C5 /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
D047FA8C24C3E21200AF17C5 /* Metatext.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Metatext.app; sourceTree = BUILT_PRODUCTS_DIR; };
@ -358,6 +361,7 @@
D0666A4424C6BC0A00F3F04B /* DatabaseError.swift */,
D052BBCE24D750C000A80A7A /* Defaults.swift */,
D0666A5324C6C3E500F3F04B /* Emoji.swift */,
D0091B7324DDF4860040E8D2 /* IdentifiedEnvironment.swift */,
D0666A4A24C6C37700F3F04B /* Identity.swift */,
D0666A4124C6BB7B00F3F04B /* IdentityDatabase.swift */,
D0666A4D24C6C39600F3F04B /* Instance.swift */,
@ -690,6 +694,7 @@
D0BEC94724CA22C400E864C4 /* TimelineViewModel.swift in Sources */,
D0666A4E24C6C39600F3F04B /* Instance.swift in Sources */,
D0ED1BDA24CF963E00B4899C /* AppAuthorizationEndpoint.swift in Sources */,
D0091B7424DDF4860040E8D2 /* IdentifiedEnvironment.swift in Sources */,
D052BBCF24D750C000A80A7A /* Defaults.swift in Sources */,
D0ED1BE324CFA84400B4899C /* MastodonError.swift in Sources */,
D0666A6324C6DC6C00F3F04B /* AppAuthorization.swift in Sources */,
@ -764,6 +769,7 @@
D0BEC94824CA22C400E864C4 /* TimelineViewModel.swift in Sources */,
D0666A4F24C6C39600F3F04B /* Instance.swift in Sources */,
D0ED1BDB24CF963E00B4899C /* AppAuthorizationEndpoint.swift in Sources */,
D0091B7524DDF4860040E8D2 /* IdentifiedEnvironment.swift in Sources */,
D052BBD024D750C000A80A7A /* Defaults.swift in Sources */,
D0ED1BE424CFA84400B4899C /* MastodonError.swift in Sources */,
D0666A6424C6DC6C00F3F04B /* AppAuthorization.swift in Sources */,

20
Shared/Extensions/Publisher+Extensions.swift
View file

@ -16,4 +16,24 @@ extension Publisher {
}
.eraseToAnyPublisher()
}
func continuingIfWeakReferenceIsStillAlive<T: AnyObject>(to object: T) -> AnyPublisher<(Output, T), Error> {
tryMap { [weak object] in
guard let object = object else { throw WeakReferenceError.deallocated }
return ($0, object)
}
.tryCatch { error -> Empty<(Output, T), Never> in
if case WeakReferenceError.deallocated = error {
return Empty()
}
throw error
}
.eraseToAnyPublisher()
}
}
private enum WeakReferenceError: Error {
case deallocated
}

39
Shared/Model/AppEnvironment.swift
View file

@ -1,7 +1,6 @@
// Copyright © 2020 Metabolist. All rights reserved.
import Foundation
import Combine
struct AppEnvironment {
let URLSessionConfiguration: URLSessionConfiguration
@ -10,41 +9,3 @@ struct AppEnvironment {
let secrets: Secrets
let webAuthSessionType: WebAuthSession.Type
}
class IdentifiedEnvironment {
@Published var identity: Identity
let observationErrors: AnyPublisher<Error, Never>
let networkClient: MastodonClient
let appEnvironment: AppEnvironment
private var cancellables = Set<AnyCancellable>()
private let observationErrorsInput = PassthroughSubject<Error, Never>()
init(identityID: String, appEnvironment: AppEnvironment) throws {
self.appEnvironment = appEnvironment
observationErrors = observationErrorsInput.eraseToAnyPublisher()
networkClient = MastodonClient(configuration: appEnvironment.URLSessionConfiguration)
networkClient.accessToken = try appEnvironment.secrets.item(.accessToken, forIdentityID: identityID)
let observation = appEnvironment.identityDatabase.identityObservation(id: identityID).share()
var initialIdentity: Identity?
observation.first().sink(
receiveCompletion: { _ in },
receiveValue: { initialIdentity = $0 })
.store(in: &cancellables)
guard let identity = initialIdentity else { throw IdentityDatabaseError.identityNotFound }
self.identity = identity
networkClient.instanceURL = identity.url
observation.catch { [weak self] error -> Empty<Identity, Never> in
self?.observationErrorsInput.send(error)
return Empty()
}
.assign(to: &$identity)
}
}

82
Shared/Model/IdentifiedEnvironment.swift Normal file
View file

@ -0,0 +1,82 @@
// Copyright © 2020 Metabolist. All rights reserved.
import Foundation
import Combine
class IdentifiedEnvironment {
@Published var identity: Identity
let observationErrors: AnyPublisher<Error, Never>
private let networkClient: MastodonClient
private let appEnvironment: AppEnvironment
private let observationErrorsInput = PassthroughSubject<Error, Never>()
private var cancellables = Set<AnyCancellable>()
init(identityID: String, appEnvironment: AppEnvironment) throws {
self.appEnvironment = appEnvironment
observationErrors = observationErrorsInput.eraseToAnyPublisher()
networkClient = MastodonClient(configuration: appEnvironment.URLSessionConfiguration)
networkClient.accessToken = try appEnvironment.secrets.item(.accessToken, forIdentityID: identityID)
let observation = appEnvironment.identityDatabase.identityObservation(id: identityID).share()
var initialIdentity: Identity?
observation.first().sink(
receiveCompletion: { _ in },
receiveValue: { initialIdentity = $0 })
.store(in: &cancellables)
guard let identity = initialIdentity else { throw IdentityDatabaseError.identityNotFound }
self.identity = identity
networkClient.instanceURL = identity.url
observation.catch { [weak self] error -> Empty<Identity, Never> in
self?.observationErrorsInput.send(error)
return Empty()
}
.assign(to: &$identity)
}
}
extension IdentifiedEnvironment {
var isAuthorized: Bool { networkClient.accessToken != nil }
func verifyCredentials() -> AnyPublisher<Void, Error> {
networkClient.request(AccountEndpoint.verifyCredentials)
.continuingIfWeakReferenceIsStillAlive(to: self)
.map { ($0, $1.identity.id) }
.flatMap(appEnvironment.identityDatabase.updateAccount)
.eraseToAnyPublisher()
}
func refreshServerPreferences() -> AnyPublisher<Void, Error> {
networkClient.request(PreferencesEndpoint.preferences)
.continuingIfWeakReferenceIsStillAlive(to: self)
.map { ($1.identity.preferences.updated(from: $0), $1.identity.id) }
.flatMap(appEnvironment.identityDatabase.updatePreferences)
.eraseToAnyPublisher()
}
func refreshInstance() -> AnyPublisher<Void, Error> {
networkClient.request(InstanceEndpoint.instance)
.continuingIfWeakReferenceIsStillAlive(to: self)
.map { ($0, $1.identity.id) }
.flatMap(appEnvironment.identityDatabase.updateInstance)
.eraseToAnyPublisher()
}
func identitiesObservation() -> AnyPublisher<[Identity], Error> {
appEnvironment.identityDatabase.identitiesObservation()
}
func recentIdentitiesObservation() -> AnyPublisher<[Identity], Error> {
appEnvironment.identityDatabase.recentIdentitiesObservation(excluding: identity.id)
}
func updatePreferences(_ preferences: Identity.Preferences) -> AnyPublisher<Void, Error> {
appEnvironment.identityDatabase.updatePreferences(preferences, forIdentityID: identity.id)
}
}

2
Shared/View Models/IdentitiesViewModel.swift
View file

@ -15,7 +15,7 @@ class IdentitiesViewModel: ObservableObject {
self.environment = environment
identity = environment.identity
environment.appEnvironment.identityDatabase.identitiesObservation()
environment.identitiesObservation()
.assignErrorsToAlertItem(to: \.alertItem, on: self)
.assign(to: &$identities)
}

21
Shared/View Models/MainNavigationViewModel.swift
View file

@ -18,8 +18,7 @@ class MainNavigationViewModel: ObservableObject {
identity = environment.identity
environment.$identity.dropFirst().assign(to: &$identity)
environment.appEnvironment.identityDatabase
.recentIdentitiesObservation(excluding: environment.identity.id)
environment.recentIdentitiesObservation()
.assignErrorsToAlertItem(to: \.alertItem, on: self)
.assign(to: &$recentIdentities)
}
@ -27,31 +26,21 @@ class MainNavigationViewModel: ObservableObject {
extension MainNavigationViewModel {
func refreshIdentity() {
let id = identity.id
if environment.networkClient.accessToken != nil {
environment.networkClient.request(AccountEndpoint.verifyCredentials)
.map { ($0, id) }
.flatMap(environment.appEnvironment.identityDatabase.updateAccount)
if environment.isAuthorized {
environment.verifyCredentials()
.assignErrorsToAlertItem(to: \.alertItem, on: self)
.sink(receiveValue: {})
.store(in: &cancellables)
if identity.preferences.useServerPostingReadingPreferences {
let capturedPreferences = identity.preferences
environment.networkClient.request(PreferencesEndpoint.preferences)
.map { (capturedPreferences.updated(from: $0), id) }
.flatMap(environment.appEnvironment.identityDatabase.updatePreferences)
environment.refreshServerPreferences()
.assignErrorsToAlertItem(to: \.alertItem, on: self)
.sink(receiveValue: {})
.store(in: &cancellables)
}
}
environment.networkClient.request(InstanceEndpoint.instance)
.map { ($0, id) }
.flatMap(environment.appEnvironment.identityDatabase.updateInstance)
environment.refreshInstance()
.assignErrorsToAlertItem(to: \.alertItem, on: self)
.sink(receiveValue: {})
.store(in: &cancellables)

16
Shared/View Models/PostingReadingPreferencesViewModel.swift
View file

@ -21,16 +21,13 @@ class PostingReadingPreferencesViewModel: ObservableObject {
.removeDuplicates()
.handleEvents(receiveOutput: { [weak self] in
if $0.useServerPostingReadingPreferences {
self?.refreshPreferences()
self?.refreshServerPreferences()
}
})
.assign(to: &$preferences)
let id = environment.identity.id
$preferences.dropFirst()
.map { ($0, id) }
.flatMap(environment.appEnvironment.identityDatabase.updatePreferences)
.flatMap(environment.updatePreferences)
.assignErrorsToAlertItem(to: \.alertItem, on: self)
.sink(receiveValue: {})
.store(in: &cancellables)
@ -38,13 +35,8 @@ class PostingReadingPreferencesViewModel: ObservableObject {
}
extension PostingReadingPreferencesViewModel {
func refreshPreferences() {
let id = environment.identity.id
let capturedPreferences = preferences
environment.networkClient.request(PreferencesEndpoint.preferences)
.map { (capturedPreferences.updated(from: $0), id) }
.flatMap(environment.appEnvironment.identityDatabase.updatePreferences)
private func refreshServerPreferences() {
environment.refreshServerPreferences()
.assignErrorsToAlertItem(to: \.alertItem, on: self)
.sink(receiveValue: {})
.store(in: &cancellables)