WIP Demo mode stuff

Sign in with a Microsoft account that doesn't own the game, demo_user will be made. This is very much WIP as my iPhone 7 doesn't feel like launching PojavLauncher.

JavaApp/src/main/java/net/kdt/pojavlaunch/Tools.java

@@ -107,6 +107,23 @@ public final class Tools
 
         javaArgList.add(versionInfo.mainClass);
         javaArgList.addAll(Arrays.asList(launchArgs));
+        if(profile.username.equals("demo_user")) {
+            File demoHome = new File(DIR_GAME_HOME + "/demo");
+            if(demoHome.exists()) {
+                for (File demoStuff : demoHome.listFiles()) { demoStuff.delete(); }
+            } else {
+                demoHome.mkdirs();
+            }
+            javaArgList.add("-Duser.home=" + DIR_GAME_HOME + "/demo");
+            File demoDir = new File(DIR_GAME_NEW + "/demo");
+            if(demoDir.exists()) {
+                for (File demoStuff : demoDir.listFiles()) { demoStuff.delete(); }
+            } else {
+                demoDir.mkdirs();
+            }
+            javaArgList.add("-Duser.dir=" + DIR_GAME_NEW + "/demo");
+            javaArgList.add("--demo");
+        }
         
         // Debug
 /*

JavaApp/src/main/java/net/kdt/pojavlaunch/authenticator/microsoft/MicrosoftAuthTask.java

@@ -46,6 +46,13 @@ public class MicrosoftAuthTask {
                 acc.profileId = msa.mcUuid;
                 acc.isMicrosoft = true;
                 acc.msaRefreshToken = msa.msRefreshToken;
+            } else if(msa.doesDemo) {
+                acc.clientToken = "0"; /* FIXME */
+                acc.accessToken = "-1"; // Differentiate from local accounts
+                acc.username = "demo_user";
+                acc.profileId = "25e00594-cf57-3f87-b3af-3f06591be252";
+                acc.isMicrosoft = false;
+                acc.msaRefreshToken = "0";
             }
             acc.save();
            

JavaApp/src/main/java/net/kdt/pojavlaunch/authenticator/microsoft/Msa.java

@@ -38,6 +38,7 @@ public class Msa {
     public String mcToken;
     public String mcUuid;
     public boolean doesOwnGame;
+    public boolean doesDemo;
 
     public Msa(MicrosoftAuthTask task, boolean isRefresh, String authCode) throws IOException, JSONException {
         this.task = task;
@@ -270,10 +271,16 @@ public class Msa {
             // Log.i("MicroAuth","Uuid Minecraft = " + uuidDashes);
             mcName=name;
             mcUuid=uuidDashes;
-        }else{
+        } else if(conn.getResponseCode() == 404) {
+            // Demo mode stuff
+            doesOwnGame = false;
+            doesDemo = true;
+        } else {
             // Log.i("MicroAuth","It seems that this Microsoft Account does not own the game.");
             doesOwnGame = false;
+            doesDemo = false;
             throwResponseError(conn);
+            
         }
     }