add offline account supportHEADtom

I added the offline patch from my MultiMC repo[1]. The only change I
made compared to my fork was adding an extra sentence in the account
adder dialog that the password needs to be blank for an offline
account.

Signed-off-by: Shokara <shokara@snopyta.org>

3 files changed, 19 insertions, 1 deletions

diff --git a/api/logic/minecraft/MinecraftInstance.cpp b/api/logic/minecraft/MinecraftInstance.cpp
index 28073edf..4617b09f 100644
--- a/api/logic/minecraft/MinecraftInstance.cpp
+++ b/api/logic/minecraft/MinecraftInstance.cpp
@@ -821,7 +821,7 @@ shared_qobject_ptr<LaunchTask> MinecraftInstance::createLaunchTask(AuthSessionPt
     }
     else
     {
-        process->appendStep(new Update(pptr, Net::Mode::Offline));
+	process->appendStep(new Update(pptr, Net::Mode::Online));
     }
 
     // if there are any jar mods
diff --git a/api/logic/minecraft/auth/MojangAccount.cpp b/api/logic/minecraft/auth/MojangAccount.cpp
index 657e0009..28f31266 100644
--- a/api/logic/minecraft/auth/MojangAccount.cpp
+++ b/api/logic/minecraft/auth/MojangAccount.cpp
@@ -19,6 +19,7 @@
 #include "flows/RefreshTask.h"
 #include "flows/AuthenticateTask.h"
 
+#include <QCryptographicHash>
 #include <QUuid>
 #include <QJsonObject>
 #include <QJsonArray>
@@ -103,6 +104,20 @@ MojangAccountPtr MojangAccount::createFromUsername(const QString &username)
     return account;
 }
 
+MojangAccountPtr MojangAccount::createFromUsernameOffline(const QString &username)
+{
+    MojangAccountPtr account(new MojangAccount());
+    account->m_clientToken = "ff64ff64ff64ff64ff64ff64ff64ff64";
+    account->m_accessToken = "ff64ff64ff64ff64ff64ff64ff64ff64";
+    account->m_username = username;
+    QList<AccountProfile> profiles;
+    QString uuid = QCryptographicHash::hash(username.toLocal8Bit(), QCryptographicHash::Md5).toHex();
+    profiles.append({uuid, username, false});
+    account->m_profiles = profiles;
+    account->setCurrentProfile(uuid);
+    return account;
+}
+
 QJsonObject MojangAccount::saveToJson() const
 {
     QJsonObject json;
diff --git a/api/logic/minecraft/auth/MojangAccount.h b/api/logic/minecraft/auth/MojangAccount.h
index 7006435e..92679076 100644
--- a/api/logic/minecraft/auth/MojangAccount.h
+++ b/api/logic/minecraft/auth/MojangAccount.h
@@ -77,6 +77,9 @@ public: /* construction */
     //! Creates an empty account for the specified user name.
     static MojangAccountPtr createFromUsername(const QString &username);
 
+    //! Creates an offline account for the specified user name.
+    static MojangAccountPtr createFromUsernameOffline(const QString &username);
+
     //! Loads a MojangAccount from the given JSON object.
     static MojangAccountPtr loadFromJson(const QJsonObject &json);