Add offline mode support

12 files changed, 144 insertions, 5 deletions

diff --git a/launcher/CMakeLists.txt b/launcher/CMakeLists.txt
index 0052f0e2..df361447 100644
--- a/launcher/CMakeLists.txt
+++ b/launcher/CMakeLists.txt
@@ -221,7 +221,11 @@ set(MINECRAFT_SOURCES
     minecraft/auth/flows/Mojang.h
     minecraft/auth/flows/MSA.cpp
     minecraft/auth/flows/MSA.h
+    minecraft/auth/flows/Offline.cpp
+    minecraft/auth/flows/Offline.h
 
+    minecraft/auth/steps/OfflineStep.cpp
+    minecraft/auth/steps/OfflineStep.h
     minecraft/auth/steps/EntitlementsStep.cpp
     minecraft/auth/steps/EntitlementsStep.h
     minecraft/auth/steps/GetSkinStep.cpp
diff --git a/launcher/LaunchController.cpp b/launcher/LaunchController.cpp
index 7750be1a..32fc99cb 100644
--- a/launcher/LaunchController.cpp
+++ b/launcher/LaunchController.cpp
@@ -116,6 +116,12 @@ void LaunchController::login() {
         m_session->wants_online = m_online;
         m_accountToUse->fillSession(m_session);
 
+        // Launch immediately in true offline mode
+        if(m_accountToUse->isOffline()) {
+            launchInstance();
+            return;
+        }
+
         switch(m_accountToUse->accountState()) {
             case AccountState::Offline: {
                 m_session->wants_online = false;
diff --git a/launcher/minecraft/auth/AccountData.cpp b/launcher/minecraft/auth/AccountData.cpp
index 7526c951..9b84fe1a 100644
--- a/launcher/minecraft/auth/AccountData.cpp
+++ b/launcher/minecraft/auth/AccountData.cpp
@@ -314,6 +314,8 @@ bool AccountData::resumeStateFromV3(QJsonObject data) {
         type = AccountType::MSA;
     } else if (typeS == "Mojang") {
         type = AccountType::Mojang;
+    } else if (typeS == "Offline") {
+        type = AccountType::Offline;
     } else {
         qWarning() << "Failed to parse account data: type is not recognized.";
         return false;
@@ -363,6 +365,9 @@ QJsonObject AccountData::saveState() const {
         tokenToJSONV3(output, xboxApiToken, "xrp-main");
         tokenToJSONV3(output, mojangservicesToken, "xrp-mc");
     }
+    else if (type == AccountType::Offline) {
+        output["type"] = "Offline";
+    }
 
     tokenToJSONV3(output, yggdrasilToken, "ygg");
     profileToJSONV3(output, minecraftProfile, "profile");
@@ -371,7 +376,7 @@ QJsonObject AccountData::saveState() const {
 }
 
 QString AccountData::userName() const {
-    if(type != AccountType::Mojang) {
+    if(type == AccountType::MSA) {
         return QString();
     }
     return yggdrasilToken.extra["userName"].toString();
@@ -427,6 +432,9 @@ QString AccountData::accountDisplayString() const {
         case AccountType::Mojang: {
             return userName();
         }
+        case AccountType::Offline: {
+            return userName();
+        }
         case AccountType::MSA: {
             if(xboxApiToken.extra.contains("gtg")) {
                 return xboxApiToken.extra["gtg"].toString();
diff --git a/launcher/minecraft/auth/AccountData.h b/launcher/minecraft/auth/AccountData.h
index abf84e43..606c1ad1 100644
--- a/launcher/minecraft/auth/AccountData.h
+++ b/launcher/minecraft/auth/AccountData.h
@@ -38,7 +38,8 @@ struct MinecraftProfile {
 
 enum class AccountType {
     MSA,
-    Mojang
+    Mojang,
+    Offline
 };
 
 enum class AccountState {
diff --git a/launcher/minecraft/auth/AccountList.cpp b/launcher/minecraft/auth/AccountList.cpp
index ef8b435d..04470e1c 100644
--- a/launcher/minecraft/auth/AccountList.cpp
+++ b/launcher/minecraft/auth/AccountList.cpp
@@ -302,7 +302,7 @@ QVariant AccountList::data(const QModelIndex &index, int role) const
             }
 
             case MigrationColumn: {
-                if(account->isMSA()) {
+                if(account->isMSA() || account->isOffline()) {
                     return tr("N/A", "Can Migrate?");
                 }
                 if (account->canMigrate()) {
diff --git a/launcher/minecraft/auth/MinecraftAccount.cpp b/launcher/minecraft/auth/MinecraftAccount.cpp
index ed9e945e..6592be0f 100644
--- a/launcher/minecraft/auth/MinecraftAccount.cpp
+++ b/launcher/minecraft/auth/MinecraftAccount.cpp
@@ -30,6 +30,7 @@
 
 #include "flows/MSA.h"
 #include "flows/Mojang.h"
+#include "flows/Offline.h"
 
 MinecraftAccount::MinecraftAccount(QObject* parent) : QObject(parent) {
     data.internalId = QUuid::createUuid().toString().remove(QRegExp("[{}-]"));
@@ -68,6 +69,23 @@ MinecraftAccountPtr MinecraftAccount::createBlankMSA()
     return account;
 }
 
+MinecraftAccountPtr MinecraftAccount::createOffline(const QString &username)
+{
+    MinecraftAccountPtr account = new MinecraftAccount();
+    account->data.type = AccountType::Offline;
+    account->data.yggdrasilToken.token = "offline";
+    account->data.yggdrasilToken.validity = Katabasis::Validity::Certain;
+    account->data.yggdrasilToken.issueInstant = QDateTime::currentDateTimeUtc();
+    account->data.yggdrasilToken.extra["userName"] = username;
+    account->data.yggdrasilToken.extra["clientToken"] = QUuid::createUuid().toString().remove(QRegExp("[{}-]"));
+    account->data.minecraftEntitlement.ownsMinecraft = true;
+    account->data.minecraftEntitlement.canPlayMinecraft = true;
+    account->data.minecraftProfile.id = QUuid::createUuid().toString().remove(QRegExp("[{}-]"));
+    account->data.minecraftProfile.name = username;
+    account->data.minecraftProfile.validity = Katabasis::Validity::Certain;
+    return account;
+}
+
 
 QJsonObject MinecraftAccount::saveToJson() const
 {
@@ -111,6 +129,16 @@ shared_qobject_ptr<AccountTask> MinecraftAccount::loginMSA() {
     return m_currentTask;
 }
 
+shared_qobject_ptr<AccountTask> MinecraftAccount::loginOffline() {
+    Q_ASSERT(m_currentTask.get() == nullptr);
+
+    m_currentTask.reset(new OfflineLogin(&data));
+    connect(m_currentTask.get(), SIGNAL(succeeded()), SLOT(authSucceeded()));
+    connect(m_currentTask.get(), SIGNAL(failed(QString)), SLOT(authFailed(QString)));
+    emit activityChanged(true);
+    return m_currentTask;
+}
+
 shared_qobject_ptr<AccountTask> MinecraftAccount::refresh() {
     if(m_currentTask) {
         return m_currentTask;
@@ -119,6 +147,9 @@ shared_qobject_ptr<AccountTask> MinecraftAccount::refresh() {
     if(data.type == AccountType::MSA) {
         m_currentTask.reset(new MSASilent(&data));
     }
+    if(data.type == AccountType::Offline) {
+        m_currentTask.reset(new OfflineRefresh(&data));
+    }
     else {
         m_currentTask.reset(new MojangRefresh(&data));
     }
diff --git a/launcher/minecraft/auth/MinecraftAccount.h b/launcher/minecraft/auth/MinecraftAccount.h
index 7ab3c746..6592f9c0 100644
--- a/launcher/minecraft/auth/MinecraftAccount.h
+++ b/launcher/minecraft/auth/MinecraftAccount.h
@@ -73,6 +73,8 @@ public: /* construction */
 
     static MinecraftAccountPtr createBlankMSA();
 
+    static MinecraftAccountPtr createOffline(const QString &username);
+
     static MinecraftAccountPtr loadFromJsonV2(const QJsonObject &json);
     static MinecraftAccountPtr loadFromJsonV3(const QJsonObject &json);
 
@@ -89,6 +91,8 @@ public: /* manipulation */
 
     shared_qobject_ptr<AccountTask> loginMSA();
 
+    shared_qobject_ptr<AccountTask> loginOffline();
+
     shared_qobject_ptr<AccountTask> refresh();
 
     shared_qobject_ptr<AccountTask> currentTask();
@@ -128,6 +132,10 @@ public: /* queries */
         return data.type == AccountType::MSA;
     }
 
+    bool isOffline() const {
+        return data.type == AccountType::Offline;
+    }
+
     bool ownsMinecraft() const {
         return data.minecraftEntitlement.ownsMinecraft;
     }
@@ -149,6 +157,10 @@ public: /* queries */
                 return "msa";
             }
             break;
+            case AccountType::Offline: {
+                return "offline";
+            }
+            break;
             default: {
                 return "unknown";
             }
diff --git a/launcher/minecraft/auth/flows/Offline.cpp b/launcher/minecraft/auth/flows/Offline.cpp
new file mode 100644
index 00000000..fc614a8c
--- /dev/null
+++ b/launcher/minecraft/auth/flows/Offline.cpp
@@ -0,0 +1,17 @@
+#include "Offline.h"
+
+#include "minecraft/auth/steps/OfflineStep.h"
+
+OfflineRefresh::OfflineRefresh(
+    AccountData *data,
+    QObject *parent
+) : AuthFlow(data, parent) {
+    m_steps.append(new OfflineStep(m_data));
+}
+
+OfflineLogin::OfflineLogin(
+    AccountData *data,
+    QObject *parent
+) : AuthFlow(data, parent) {
+    m_steps.append(new OfflineStep(m_data));
+}
diff --git a/launcher/minecraft/auth/flows/Offline.h b/launcher/minecraft/auth/flows/Offline.h
new file mode 100644
index 00000000..5d1f83a4
--- /dev/null
+++ b/launcher/minecraft/auth/flows/Offline.h
@@ -0,0 +1,22 @@
+#pragma once
+#include "AuthFlow.h"
+
+class OfflineRefresh : public AuthFlow
+{
+    Q_OBJECT
+public:
+    explicit OfflineRefresh(
+        AccountData *data,
+        QObject *parent = 0
+    );
+};
+
+class OfflineLogin : public AuthFlow
+{
+    Q_OBJECT
+public:
+    explicit OfflineLogin(
+        AccountData *data,
+        QObject *parent = 0
+    );
+};
diff --git a/launcher/minecraft/auth/steps/OfflineStep.cpp b/launcher/minecraft/auth/steps/OfflineStep.cpp
new file mode 100644
index 00000000..9f1fc266
--- /dev/null
+++ b/launcher/minecraft/auth/steps/OfflineStep.cpp
@@ -0,0 +1,18 @@
+#include "OfflineStep.h"
+
+#include "Application.h"
+
+OfflineStep::OfflineStep(AccountData* data) : AuthStep(data) {};
+OfflineStep::~OfflineStep() noexcept = default;
+
+QString OfflineStep::describe() {
+    return tr("Creating offline account.");
+}
+
+void OfflineStep::rehydrate() {
+    // NOOP
+}
+
+void OfflineStep::perform() {
+    emit finished(AccountTaskState::STATE_WORKING, tr("Created offline account."));
+}
diff --git a/launcher/minecraft/auth/steps/OfflineStep.h b/launcher/minecraft/auth/steps/OfflineStep.h
new file mode 100644
index 00000000..62addb1f
--- /dev/null
+++ b/launcher/minecraft/auth/steps/OfflineStep.h
@@ -0,0 +1,20 @@
+
+#pragma once
+#include <QObject>
+
+#include "QObjectPtr.h"
+#include "minecraft/auth/AuthStep.h"
+
+#include <katabasis/DeviceFlow.h>
+
+class OfflineStep : public AuthStep {
+    Q_OBJECT
+public:
+    explicit OfflineStep(AccountData *data);
+    virtual ~OfflineStep() noexcept;
+
+    void perform() override;
+    void rehydrate() override;
+
+    QString describe() override;
+};
diff --git a/launcher/ui/dialogs/OfflineLoginDialog.cpp b/launcher/ui/dialogs/OfflineLoginDialog.cpp
index f6ecc4e9..0cc922f8 100644
--- a/launcher/ui/dialogs/OfflineLoginDialog.cpp
+++ b/launcher/ui/dialogs/OfflineLoginDialog.cpp
@@ -42,8 +42,8 @@ void OfflineLoginDialog::accept()
     ui->progressBar->setVisible(true);
 
     // Setup the login task and start it
-    m_account = MinecraftAccount::createFromUsername(ui->userTextBox->text());
-    m_loginTask = m_account->login("TODO: create offline mode account flow");
+    m_account = MinecraftAccount::createOffline(ui->userTextBox->text());
+    m_loginTask = m_account->loginOffline();
     connect(m_loginTask.get(), &Task::failed, this, &OfflineLoginDialog::onTaskFailed);
     connect(m_loginTask.get(), &Task::succeeded, this, &OfflineLoginDialog::onTaskSucceeded);
     connect(m_loginTask.get(), &Task::status, this, &OfflineLoginDialog::onTaskStatus);