Complete rewrite of Admin & Party chat code

There are some API breaks as a result of these rewrites, I tried to keep it minimal, but I'm sure some plugins will need to update.

src/main/java/com/gmail/nossr50/chat/mailer/AbstractChatMailer.java

@@ -0,0 +1,13 @@
+package com.gmail.nossr50.chat.mailer;
+
+import org.bukkit.plugin.Plugin;
+import org.jetbrains.annotations.NotNull;
+
+
+public abstract class AbstractChatMailer implements ChatMailer {
+    protected final @NotNull Plugin pluginRef;
+
+    public AbstractChatMailer(@NotNull Plugin pluginRef) {
+        this.pluginRef = pluginRef;
+    }
+}

src/main/java/com/gmail/nossr50/chat/mailer/AdminChatMailer.java

@@ -0,0 +1,72 @@
+package com.gmail.nossr50.chat.mailer;
+
+import com.gmail.nossr50.chat.author.Author;
+import com.gmail.nossr50.chat.message.AdminChatMessage;
+import com.gmail.nossr50.chat.message.ChatMessage;
+import com.gmail.nossr50.events.chat.McMMOAdminChatEvent;
+import com.gmail.nossr50.events.chat.McMMOChatEvent;
+import com.gmail.nossr50.locale.LocaleLoader;
+import com.gmail.nossr50.mcMMO;
+import net.kyori.adventure.audience.Audience;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.TextComponent;
+import org.bukkit.Bukkit;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.ConsoleCommandSender;
+import org.bukkit.plugin.Plugin;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.function.Predicate;
+
+public class AdminChatMailer extends AbstractChatMailer {
+
+    public AdminChatMailer(Plugin pluginRef) {
+        super(pluginRef);
+    }
+
+    public static final @NotNull String MCMMO_CHAT_ADMINCHAT_PERMISSION = "mcmmo.chat.adminchat";
+
+    /**
+     * Constructs an audience of admins
+     * @return an audience of admins
+     */
+    public @NotNull Audience constructAudience() {
+        return mcMMO.getAudiences().filter(predicate());
+    }
+
+    /**
+     * Predicate used to filter the audience
+     * @return admin chat audience predicate
+     */
+    public @NotNull Predicate<CommandSender> predicate() {
+        return (commandSender) -> commandSender.isOp()
+                || commandSender.hasPermission(MCMMO_CHAT_ADMINCHAT_PERMISSION)
+                || commandSender instanceof ConsoleCommandSender;
+    }
+
+    /**
+     * Styles a string using a locale entry
+     * @param author message author
+     * @param message message contents
+     * @return the styled string, based on a locale entry
+     */
+    public @NotNull TextComponent addStyle(@NotNull Author author, @NotNull String message) {
+        return Component.text(LocaleLoader.getString("Chat.Style.Admin", author.getAuthoredName(), message));
+    }
+
+    @Override
+    public void sendMail(@NotNull ChatMessage chatMessage) {
+        chatMessage.sendMessage();
+    }
+
+    public void processChatMessage(@NotNull Author author, @NotNull String rawString, boolean isAsync) {
+        AdminChatMessage chatMessage = new AdminChatMessage(pluginRef, author, constructAudience(), rawString, addStyle(author, rawString));
+
+        McMMOChatEvent chatEvent = new McMMOAdminChatEvent(pluginRef, chatMessage, isAsync);
+        Bukkit.getPluginManager().callEvent(chatEvent);
+
+        if(!chatEvent.isCancelled()) {
+            sendMail(chatMessage);
+        }
+    }
+}

src/main/java/com/gmail/nossr50/chat/mailer/ChatMailer.java

@@ -0,0 +1,12 @@
+package com.gmail.nossr50.chat.mailer;
+
+import com.gmail.nossr50.chat.message.ChatMessage;
+import org.jetbrains.annotations.NotNull;
+
+public interface ChatMailer {
+    /**
+     * Send out a chat message
+     * @param chatMessage the {@link ChatMessage}
+     */
+    void sendMail(@NotNull ChatMessage chatMessage);
+}

src/main/java/com/gmail/nossr50/chat/mailer/PartyChatMailer.java

@@ -0,0 +1,47 @@
+package com.gmail.nossr50.chat.mailer;
+
+import com.gmail.nossr50.chat.author.Author;
+import com.gmail.nossr50.chat.message.ChatMessage;
+import com.gmail.nossr50.chat.message.PartyChatMessage;
+import com.gmail.nossr50.datatypes.party.Party;
+import com.gmail.nossr50.events.chat.McMMOChatEvent;
+import com.gmail.nossr50.events.chat.McMMOPartyChatEvent;
+import com.gmail.nossr50.locale.LocaleLoader;
+import com.gmail.nossr50.mcMMO;
+import net.kyori.adventure.audience.Audience;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.TextComponent;
+import org.bukkit.Bukkit;
+import org.bukkit.plugin.Plugin;
+import org.jetbrains.annotations.NotNull;
+
+public class PartyChatMailer extends AbstractChatMailer {
+
+    public PartyChatMailer(@NotNull Plugin pluginRef) {
+        super(pluginRef);
+    }
+
+    public void processChatMessage(@NotNull Author author, @NotNull String rawString, @NotNull Party party, boolean isAsync) {
+        PartyChatMessage chatMessage = new PartyChatMessage(pluginRef, author, constructPartyAudience(party), rawString, addStyle(author, rawString), party);
+
+        McMMOChatEvent chatEvent = new McMMOPartyChatEvent(pluginRef, chatMessage, party, isAsync);
+        Bukkit.getPluginManager().callEvent(chatEvent);
+
+        if(!chatEvent.isCancelled()) {
+            sendMail(chatMessage);
+        }
+    }
+
+    public @NotNull Audience constructPartyAudience(@NotNull Party party) {
+        return mcMMO.getAudiences().filter(party.getSamePartyPredicate());
+    }
+
+    public @NotNull TextComponent addStyle(@NotNull Author author, @NotNull String message) {
+        return Component.text(LocaleLoader.getString("Chat.Style.Party", author.getAuthoredName(), message));
+    }
+
+    @Override
+    public void sendMail(@NotNull ChatMessage chatMessage) {
+        chatMessage.sendMessage();
+    }
+}