detect canelex's perspective mod and die

7 files changed, 115 insertions, 35 deletions

diff --git a/perspectivemod.png b/.github/perspectivemod.png
index c87b15a..c87b15a 100644
--- a/perspectivemod.png
+++ b/.github/perspectivemod.png
diff --git a/README.md b/README.md
index eece8f8..8c07a63 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 A remake of [Perspective Mod v3 by canelex](https://github.com/Canelex/PerspectiveMod) with bug fixes and additional functionality
 
-![Image of mod](perspectivemod.png)
+![Image of mod](.github/perspectivemod.png)
 
 Features:
 - Mouse button support
diff --git a/build.gradle b/build.gradle
index c4a3739..cafad49 100644
--- a/build.gradle
+++ b/build.gradle
@@ -21,7 +21,8 @@ apply plugin: "com.github.johnrengelman.shadow"
 version = "4.0"
 group= "me.djtheredstoner"
 archivesBaseName = "PerspectiveModv4"
-String modid = "djperspectivemod"
+
+def modid = "djperspectivemod"
 
 sourceCompatibility = JavaVersion.VERSION_1_8
 targetCompatibility = JavaVersion.VERSION_1_8
@@ -36,8 +37,8 @@ sourceSets {
 minecraft {
     version = "1.8.9-11.15.1.2318-1.8.9"
     runDir = "run"
-
     mappings = "stable_22"
+    clientJvmArgs += "-Dfml.coreMods.load=me.djtheredstoner.perspectivemod.forge.PerspectiveModLoadingPlugin"
 }
 
 repositories {
@@ -46,7 +47,11 @@ repositories {
 }
 
 dependencies {
-    implementation 'org.spongepowered:mixin:0.7.11-SNAPSHOT'
+    implementation('org.spongepowered:mixin:0.7.11-SNAPSHOT') {
+        exclude module: 'gson'
+        exclude module: 'guava'
+        exclude module: 'commons-io'
+    }
 }
 
 mixin {
@@ -67,7 +72,8 @@ shadowJar {
             'MixinConfigs': "mixins.${modid}.json",
             'FMLCorePluginContainsFMLMod': true,
             "ForceLoadAsMod": true,
-            'ModSide': 'CLIENT'
+            'ModSide': 'CLIENT',
+            "FMLCorePlugin": "me.djtheredstoner.perspectivemod.forge.PerspectiveTweaker"
     )
 
     exclude('dummyThing')
diff --git a/src/main/java/me/djtheredstoner/perspectivemod/PerspectiveMod.java b/src/main/java/me/djtheredstoner/perspectivemod/PerspectiveMod.java
index f819c66..5cdbd3b 100644
--- a/src/main/java/me/djtheredstoner/perspectivemod/PerspectiveMod.java
+++ b/src/main/java/me/djtheredstoner/perspectivemod/PerspectiveMod.java
@@ -22,7 +22,6 @@ import org.lwjgl.opengl.Display;
 
 import java.io.File;
 
-
 @Mod(modid = "djperspectivemod", name = "Perspective Mod v4", version = "4.0", acceptedMinecraftVersions = "[1.8.9]", clientSideOnly = true)
 public class PerspectiveMod {
 
@@ -42,9 +41,7 @@ public class PerspectiveMod {
     public void preInit(FMLPreInitializationEvent event) {
         File configFile = new File(event.getModConfigurationDirectory(), "perspectivemodv4.json");
         loadConfig(configFile);
-        Runtime.getRuntime().addShutdownHook(new Thread(() -> {
-            saveConfig(configFile);
-        }));
+        Runtime.getRuntime().addShutdownHook(new Thread(() -> saveConfig(configFile)));
     }
 
     @Mod.EventHandler
@@ -56,21 +53,21 @@ public class PerspectiveMod {
 
     @SubscribeEvent
     public void onKeyEvent(InputEvent.KeyInputEvent event) {
-        if(perspectiveKey.getKeyCode() > 0) {
+        if (perspectiveKey.getKeyCode() > 0) {
             onPressed(Keyboard.getEventKey(), Keyboard.getEventKeyState());
         }
     }
 
     @SubscribeEvent
     public void onMouseEvent(InputEvent.MouseInputEvent event) {
-        if(perspectiveKey.getKeyCode() < 0) {
+        if (perspectiveKey.getKeyCode() < 0) {
             onPressed(Mouse.getEventButton() - 100, Mouse.getEventButtonState());
         }
     }
 
     public static void onPressed(int eventKey, boolean state) {
         if (eventKey == perspectiveKey.getKeyCode()) {
-            if(config.modEnabled) {
+            if (config.modEnabled) {
                 if (state) {
                     perspectiveToggled = !perspectiveToggled;
                     cameraYaw = mc.thePlayer.rotationYaw;
@@ -86,7 +83,7 @@ public class PerspectiveMod {
                     perspectiveToggled = false;
                     mc.gameSettings.thirdPersonView = previousPerspective;
                 }
-            } else if(perspectiveToggled) {
+            } else if (perspectiveToggled) {
                 perspectiveToggled = false;
                 mc.gameSettings.thirdPersonView = previousPerspective;
             }
@@ -94,10 +91,8 @@ public class PerspectiveMod {
     }
 
     public static boolean overrideMouse() {
-        if (mc.inGameHasFocus && Display.isActive())
-        {
-            if (!perspectiveToggled)
-            {
+        if (mc.inGameHasFocus && Display.isActive()) {
+            if (!perspectiveToggled) {
                 return true;
             }
 
@@ -119,7 +114,7 @@ public class PerspectiveMod {
     }
 
     public static void loadConfig(File configFile) {
-        if(configFile.exists()) {
+        if (configFile.exists()) {
             try {
                 String json = FileUtils.readFileToString(configFile);
                 config = gson.fromJson(json, PerspectiveModConfig.class);
@@ -140,6 +135,5 @@ public class PerspectiveMod {
         } catch (Exception e) {
             e.printStackTrace();
         }
-    };
-
+    }
 }
diff --git a/src/main/java/me/djtheredstoner/perspectivemod/PerspectiveModCommand.java b/src/main/java/me/djtheredstoner/perspectivemod/PerspectiveModCommand.java
index c19c81c..3eae96a 100644
--- a/src/main/java/me/djtheredstoner/perspectivemod/PerspectiveModCommand.java
+++ b/src/main/java/me/djtheredstoner/perspectivemod/PerspectiveModCommand.java
@@ -5,7 +5,7 @@ import net.minecraft.command.CommandException;
 import net.minecraft.command.ICommandSender;
 import net.minecraft.util.ChatComponentText;
 
-import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 
 public class PerspectiveModCommand extends CommandBase {
@@ -19,39 +19,37 @@ public class PerspectiveModCommand extends CommandBase {
 
     @Override
     public List<String> getCommandAliases() {
-        List<String> aliases = new ArrayList<>();
-        aliases.add("pmod");
-        return aliases;
+        return Collections.singletonList("pmod");
     }
 
     @Override
     public String getCommandUsage(ICommandSender sender) {
-        return  "§6Perspective Mod Help\n" +
-                "§b/pmod <enable|disable> §7- Enables or disables the mod.\n" +
-                "§b/pmod mode <hold|toggle> §7- Changes the mode.\n" +
-                "§7Edit the keybind in the minecraft controls menu.";
+        return "§6Perspective Mod Help\n" +
+            "§b/pmod <enable|disable> §7- Enables or disables the mod.\n" +
+            "§b/pmod mode <hold|toggle> §7- Changes the mode.\n" +
+            "§7Edit the keybind in the minecraft controls menu.";
     }
 
     @Override
     public void processCommand(ICommandSender sender, String[] args) throws CommandException {
-        if(args.length > 0 && args.length < 3) {
+        if (args.length > 0 && args.length < 3) {
             String arg = args[0];
-            if(arg.equalsIgnoreCase("enable")) {
+            if (arg.equalsIgnoreCase("enable")) {
                 PerspectiveMod.config.modEnabled = true;
 
                 sendMessage(sender, "§bMod §aEnabled§b.");
-            } else if(arg.equalsIgnoreCase("disable")) {
+            } else if (arg.equalsIgnoreCase("disable")) {
                 PerspectiveMod.config.modEnabled = false;
 
                 sendMessage(sender, "§bMod §cDisabled§b.");
-            } else if(arg.equalsIgnoreCase("mode")) {
-                if(args.length == 2) {
+            } else if (arg.equalsIgnoreCase("mode")) {
+                if (args.length == 2) {
                     String mode = args[1];
-                    if(mode.equalsIgnoreCase("hold")) {
+                    if (mode.equalsIgnoreCase("hold")) {
                         PerspectiveMod.config.holdMode = true;
 
                         sendMessage(sender, "§bMode set to hold.");
-                    } else if(mode.equalsIgnoreCase("toggle")) {
+                    } else if (mode.equalsIgnoreCase("toggle")) {
                         PerspectiveMod.config.holdMode = false;
 
                         sendMessage(sender, "§bMode set to toggle.");
diff --git a/src/main/java/me/djtheredstoner/perspectivemod/forge/PerspectiveModLoadingPlugin.java b/src/main/java/me/djtheredstoner/perspectivemod/forge/PerspectiveModLoadingPlugin.java
index c54efd7..1242671 100644
--- a/src/main/java/me/djtheredstoner/perspectivemod/forge/PerspectiveModLoadingPlugin.java
+++ b/src/main/java/me/djtheredstoner/perspectivemod/forge/PerspectiveModLoadingPlugin.java
@@ -1,5 +1,6 @@
 package me.djtheredstoner.perspectivemod.forge;
 
+import net.minecraftforge.common.ForgeVersion;
 import net.minecraftforge.fml.relauncher.IFMLLoadingPlugin;
 import org.spongepowered.asm.launch.MixinBootstrap;
 import org.spongepowered.asm.mixin.Mixins;
@@ -7,6 +8,7 @@ import org.spongepowered.asm.mixin.Mixins;
 import java.util.Map;
 
 // ONLY needed in development environment, the mixin tweaker handles this in prod.
+@IFMLLoadingPlugin.MCVersion(ForgeVersion.mcVersion)
 public class PerspectiveModLoadingPlugin implements IFMLLoadingPlugin {
 
     public PerspectiveModLoadingPlugin() {
diff --git a/src/main/java/me/djtheredstoner/perspectivemod/forge/PerspectiveTweaker.java b/src/main/java/me/djtheredstoner/perspectivemod/forge/PerspectiveTweaker.java
new file mode 100644
index 0000000..f22ba05
--- /dev/null
+++ b/src/main/java/me/djtheredstoner/perspectivemod/forge/PerspectiveTweaker.java
@@ -0,0 +1,80 @@
+package me.djtheredstoner.perspectivemod.forge;
+
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParser;
+import net.minecraft.launchwrapper.Launch;
+import net.minecraftforge.common.ForgeVersion;
+import net.minecraftforge.fml.relauncher.IFMLLoadingPlugin;
+
+import javax.swing.JOptionPane;
+import java.io.File;
+import java.io.InputStream;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.Map;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipFile;
+
+// this one will be loaded in prod, used to detect Canelex's perspective mod
+@IFMLLoadingPlugin.MCVersion(ForgeVersion.mcVersion)
+public class PerspectiveTweaker implements IFMLLoadingPlugin {
+
+    public PerspectiveTweaker() {
+        File mods = new File(Launch.minecraftHome, "mods");
+
+        if (!mods.exists()) {
+            mods.mkdirs(); // mods folder may not exist in dev yet
+        }
+
+        File[] coreModList = mods.listFiles((dir, name) -> name.endsWith(".jar"));
+        for (File file : coreModList) {
+            try {
+                try (ZipFile zipFile = new ZipFile(file)) {
+                    if (zipFile.getEntry("net/canelex/perspectivemod/PerspectiveMod.class") != null) {
+                        halt("<html><p>Perspective Mod v4 is not compatible with Perspective Mod v3 by Canelex. Please remove Canelex's in order to launch the game.</p></html>");
+                        continue;
+                    }
+                }
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    private void halt(final String message) {
+        JOptionPane.showMessageDialog(null, message, "Launch Aborted", JOptionPane.ERROR_MESSAGE);
+        try {
+            final Class<?> aClass = Class.forName("java.lang.Shutdown");
+            final Method exit = aClass.getDeclaredMethod("exit", int.class);
+            exit.setAccessible(true);
+            exit.invoke(null, 0);
+        } catch (ClassNotFoundException | NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public String[] getASMTransformerClass() {
+        return new String[0];
+    }
+
+    @Override
+    public String getModContainerClass() {
+        return null;
+    }
+
+    @Override
+    public String getSetupClass() {
+        return null;
+    }
+
+    @Override
+    public void injectData(Map<String, Object> map) {
+
+    }
+
+    @Override
+    public String getAccessTransformerClass() {
+        return null;
+    }
+}