Add deleted files by merge back again

Author: FrankHeijden

providers/BaseProviders/src/main/java/net/ess3/provider/FormattedCommandAliasProvider.java

@@ -0,0 +1,12 @@
+package net.ess3.provider;
+
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.FormattedCommandAlias;
+
+import java.util.List;
+
+public interface FormattedCommandAliasProvider {
+
+    List<String> createCommands(FormattedCommandAlias command, CommandSender sender, String[] args);
+
+}

providers/NMSReflectionProvider/src/main/java/net/ess3/nms/refl/providers/ReflFormattedCommandAliasProvider.java

@@ -0,0 +1,81 @@
+package net.ess3.nms.refl.providers;
+
+import net.ess3.nms.refl.ReflUtil;
+import net.ess3.provider.FormattedCommandAliasProvider;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.FormattedCommandAlias;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.List;
+
+public class ReflFormattedCommandAliasProvider implements FormattedCommandAliasProvider {
+
+    private final boolean paper;
+    private final Field formatStringsField;
+    private final Method buildCommandMethod;
+
+    public ReflFormattedCommandAliasProvider(boolean paper) {
+        this.paper = paper;
+        Field formatStringsField = null;
+        Method buildCommandMethod = null;
+        try {
+            @SuppressWarnings("unchecked")
+            final Class<? extends FormattedCommandAlias> formattedCommandAliasClass = (Class<? extends FormattedCommandAlias>) ReflUtil.getOBClass("command.FormattedCommandAlias");
+            if (formattedCommandAliasClass != null) {
+                formatStringsField = ReflUtil.getFieldCached(formattedCommandAliasClass, "formatStrings");
+                if (paper) {
+                    buildCommandMethod = ReflUtil.getMethodCached(formattedCommandAliasClass, "buildCommand", CommandSender.class, String.class, String[].class);
+                } else {
+                    buildCommandMethod = ReflUtil.getMethodCached(formattedCommandAliasClass, "buildCommand", String.class, String[].class);
+                }
+            }
+        } catch (final Exception ex) {
+            ex.printStackTrace();
+        } finally {
+            this.formatStringsField = formatStringsField;
+            this.buildCommandMethod = buildCommandMethod;
+        }
+    }
+
+    @Override
+    public List<String> createCommands(FormattedCommandAlias command, CommandSender sender, String[] args) {
+        final List<String> commands = new ArrayList<>();
+        if (buildCommandMethod == null || formatStringsField == null) return commands;
+
+        final String[] formatStrings;
+        try {
+            formatStrings = (String[]) formatStringsField.get(command);
+        } catch (ReflectiveOperationException ex) {
+            ex.printStackTrace();
+            return commands;
+        }
+
+        for (String formatString : formatStrings) {
+            final String cmd;
+            try {
+                cmd = buildCommand(command, sender, formatString, args);
+            } catch (Throwable th) {
+                continue; // Ignore, let server handle this.
+            }
+
+            if (cmd == null) continue;
+            commands.add(cmd.trim());
+        }
+        return commands;
+    }
+
+    private String buildCommand(FormattedCommandAlias command, CommandSender sender, String formatString, String[] args) {
+        try {
+            if (paper) {
+                return (String) buildCommandMethod.invoke(command, sender, formatString, args);
+            } else {
+                return (String) buildCommandMethod.invoke(command, formatString, args);
+            }
+        } catch (ReflectiveOperationException ex) {
+            ex.printStackTrace();
+        }
+        return null;
+    }
+}