Leaf/leaf-api/paper-patches/features/0010-Pufferfish-Sentry.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Kevin Raneri <kevin.raneri@gmail.com>
Date: Tue, 9 Nov 2021 14:01:56 -0500
Subject: [PATCH] Pufferfish: Sentry

Original license: GPL v3
Original project: https://github.com/pufferfish-gg/Pufferfish

diff --git a/src/main/java/gg/pufferfish/pufferfish/sentry/SentryContext.java b/src/main/java/gg/pufferfish/pufferfish/sentry/SentryContext.java
new file mode 100644
index 0000000000000000000000000000000000000000..c7772aac00f6db664f7a5673bc2585fa025e6aad
--- /dev/null
+++ b/src/main/java/gg/pufferfish/pufferfish/sentry/SentryContext.java
@@ -0,0 +1,165 @@
+package gg.pufferfish.pufferfish.sentry;
+
+import com.google.gson.Gson;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+import java.util.Map;
+import java.util.TreeMap;
+
+import org.apache.logging.log4j.ThreadContext;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+import org.bukkit.event.Event;
+import org.bukkit.event.player.PlayerEvent;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.plugin.RegisteredListener;
+import org.jetbrains.annotations.Nullable;
+
+public class SentryContext {
+
+    private static final Gson GSON = new Gson();
+
+    public static void setPluginContext(@Nullable Plugin plugin) {
+        if (plugin != null) {
+            ThreadContext.put("pufferfishsentry_pluginname", plugin.getName());
+            ThreadContext.put("pufferfishsentry_pluginversion", plugin.getPluginMeta().getVersion());
+        }
+    }
+
+    public static void removePluginContext() {
+        ThreadContext.remove("pufferfishsentry_pluginname");
+        ThreadContext.remove("pufferfishsentry_pluginversion");
+    }
+
+    public static void setSenderContext(@Nullable CommandSender sender) {
+        if (sender != null) {
+            ThreadContext.put("pufferfishsentry_playername", sender.getName());
+            if (sender instanceof Player player) {
+                ThreadContext.put("pufferfishsentry_playerid", player.getUniqueId().toString());
+            }
+        }
+    }
+
+    public static void removeSenderContext() {
+        ThreadContext.remove("pufferfishsentry_playername");
+        ThreadContext.remove("pufferfishsentry_playerid");
+    }
+
+    public static void setEventContext(Event event, RegisteredListener registration) {
+        setPluginContext(registration.getPlugin());
+
+        try {
+            // Find the player that was involved with this event
+            Player player = null;
+            if (event instanceof PlayerEvent) {
+                player = ((PlayerEvent) event).getPlayer();
+            } else {
+                Class<? extends Event> eventClass = event.getClass();
+
+                Field playerField = null;
+
+                for (Field field : eventClass.getDeclaredFields()) {
+                    if (field.getType().equals(Player.class)) {
+                        playerField = field;
+                        break;
+                    }
+                }
+
+                if (playerField != null) {
+                    playerField.setAccessible(true);
+                    player = (Player) playerField.get(event);
+                }
+            }
+
+            if (player != null) {
+                setSenderContext(player);
+            }
+        } catch (Exception ignored) {
+        } // We can't really safely log exceptions.
+
+        ThreadContext.put("pufferfishsentry_eventdata", GSON.toJson(serializeFields(event)));
+    }
+
+    public static void removeEventContext() {
+        removePluginContext();
+        removeSenderContext();
+        ThreadContext.remove("pufferfishsentry_eventdata");
+    }
+
+    private static Map<String, String> serializeFields(Object object) {
+        Map<String, String> fields = new TreeMap<>();
+        fields.put("_class", object.getClass().getName());
+        for (Field declaredField : object.getClass().getDeclaredFields()) {
+            try {
+                if (Modifier.isStatic(declaredField.getModifiers())) {
+                    continue;
+                }
+
+                String fieldName = declaredField.getName();
+                if (fieldName.equals("handlers")) {
+                    continue;
+                }
+                declaredField.setAccessible(true);
+                Object value = declaredField.get(object);
+                if (value != null) {
+                    fields.put(fieldName, value.toString());
+                } else {
+                    fields.put(fieldName, "<null>");
+                }
+            } catch (Exception ignored) {
+            } // We can't really safely log exceptions.
+        }
+        return fields;
+    }
+
+    public static class State {
+
+        private Plugin plugin;
+        private Command command;
+        private String commandLine;
+        private Event event;
+        private RegisteredListener registeredListener;
+
+        public Plugin getPlugin() {
+            return plugin;
+        }
+
+        public void setPlugin(Plugin plugin) {
+            this.plugin = plugin;
+        }
+
+        public Command getCommand() {
+            return command;
+        }
+
+        public void setCommand(Command command) {
+            this.command = command;
+        }
+
+        public String getCommandLine() {
+            return commandLine;
+        }
+
+        public void setCommandLine(String commandLine) {
+            this.commandLine = commandLine;
+        }
+
+        public Event getEvent() {
+            return event;
+        }
+
+        public void setEvent(Event event) {
+            this.event = event;
+        }
+
+        public RegisteredListener getRegisteredListener() {
+            return registeredListener;
+        }
+
+        public void setRegisteredListener(RegisteredListener registeredListener) {
+            this.registeredListener = registeredListener;
+        }
+    }
+}
diff --git a/src/main/java/org/bukkit/plugin/SimplePluginManager.java b/src/main/java/org/bukkit/plugin/SimplePluginManager.java
index dfc2d76403993640e6283f25f9f3647bb6d1a30c..cc07a76545aefbf9eb0915025c89770298be2c1c 100644
--- a/src/main/java/org/bukkit/plugin/SimplePluginManager.java
+++ b/src/main/java/org/bukkit/plugin/SimplePluginManager.java
@@ -597,7 +597,9 @@ public final class SimplePluginManager implements PluginManager {
 
     // Paper start
     private void handlePluginException(String msg, Throwable ex, Plugin plugin) {
+        gg.pufferfish.pufferfish.sentry.SentryContext.setPluginContext(plugin); // Pufferfish
         server.getLogger().log(Level.SEVERE, msg, ex);
+        gg.pufferfish.pufferfish.sentry.SentryContext.removePluginContext(); // Pufferfish
         callEvent(new com.destroystokyo.paper.event.server.ServerExceptionEvent(new com.destroystokyo.paper.exception.ServerPluginEnableDisableException(msg, ex, plugin)));
     }
     // Paper end
@@ -667,9 +669,11 @@ public final class SimplePluginManager implements PluginManager {
                             ));
                 }
             } catch (Throwable ex) {
+                gg.pufferfish.pufferfish.sentry.SentryContext.setEventContext(event, registration); // Pufferfish
                 // Paper start - error reporting
                 String msg = "Could not pass event " + event.getEventName() + " to " + registration.getPlugin().getDescription().getFullName();
                 server.getLogger().log(Level.SEVERE, msg, ex);
+                gg.pufferfish.pufferfish.sentry.SentryContext.removeEventContext(); // Pufferfish
                 if (!(event instanceof com.destroystokyo.paper.event.server.ServerExceptionEvent)) { // We don't want to cause an endless event loop
                     callEvent(new com.destroystokyo.paper.event.server.ServerExceptionEvent(new com.destroystokyo.paper.exception.ServerEventException(msg, ex, registration.getPlugin(), registration.getListener(), event)));
                 }
diff --git a/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java b/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java
index 539786355ac89b5eb8ad876e65662e844d4654e3..ce45dbc7b02c405f1b3460563cf87e7888702ba9 100644
--- a/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java
+++ b/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java
@@ -336,7 +336,13 @@ public final class JavaPluginLoader implements PluginLoader {
             try {
                 jPlugin.setEnabled(true);
             } catch (Throwable ex) {
+                gg.pufferfish.pufferfish.sentry.SentryContext.setPluginContext(plugin); // Pufferfish
                 server.getLogger().log(Level.SEVERE, "Error occurred while enabling " + plugin.getDescription().getFullName() + " (Is it up to date?)", ex);
+                gg.pufferfish.pufferfish.sentry.SentryContext.removePluginContext(); // Pufferfish
+                // Paper start - Disable plugins that fail to load
+                this.server.getPluginManager().disablePlugin(jPlugin);
+                return;
+                // Paper end
             }
 
             // Perhaps abort here, rather than continue going, but as it stands,
@@ -361,7 +367,9 @@ public final class JavaPluginLoader implements PluginLoader {
             try {
                 jPlugin.setEnabled(false);
             } catch (Throwable ex) {
+                gg.pufferfish.pufferfish.sentry.SentryContext.setPluginContext(plugin); // Pufferfish
                 server.getLogger().log(Level.SEVERE, "Error occurred while disabling " + plugin.getDescription().getFullName() + " (Is it up to date?)", ex);
+                gg.pufferfish.pufferfish.sentry.SentryContext.removePluginContext(); // Pufferfish
             }
 
             if (cloader instanceof PluginClassLoader) {