Add dicore3-command

1 files changed, 74 insertions, 0 deletions

diff --git a/dicore3/command/src/main/java/io/dico/dicore/command/chat/help/defaults/SyntaxHelpTopic.java b/dicore3/command/src/main/java/io/dico/dicore/command/chat/help/defaults/SyntaxHelpTopic.java
new file mode 100644
index 0000000..7c0bc9d
--- /dev/null
+++ b/dicore3/command/src/main/java/io/dico/dicore/command/chat/help/defaults/SyntaxHelpTopic.java
@@ -0,0 +1,74 @@
+package io.dico.dicore.command.chat.help.defaults;
+
+import io.dico.dicore.command.Command;
+import io.dico.dicore.command.EMessageType;
+import io.dico.dicore.command.ExecutionContext;
+import io.dico.dicore.command.ICommandAddress;
+import io.dico.dicore.command.chat.Formatting;
+import io.dico.dicore.command.chat.help.IHelpComponent;
+import io.dico.dicore.command.chat.help.IHelpTopic;
+import io.dico.dicore.command.chat.help.SimpleHelpComponent;
+import io.dico.dicore.command.parameter.Parameter;
+import io.dico.dicore.command.parameter.ParameterList;
+import org.bukkit.permissions.Permissible;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+
+public class SyntaxHelpTopic implements IHelpTopic {
+
+    @Override
+    public List<IHelpComponent> getComponents(ICommandAddress target, Permissible viewer, ExecutionContext context) {
+        if (!target.hasCommand()) {
+            return Collections.emptyList();
+        }
+
+        String line = context.getFormat(EMessageType.SYNTAX) + "Syntax: "
+                + context.getFormat(EMessageType.INSTRUCTION) + target.getAddress()
+                + ' ' + getShortSyntax(target, context);
+
+        return Collections.singletonList(new SimpleHelpComponent(line));
+    }
+
+    private static String getShortSyntax(ICommandAddress target, ExecutionContext ctx) {
+        StringBuilder syntax = new StringBuilder();
+        if (target.hasCommand()) {
+            Formatting syntaxColor = ctx.getFormat(EMessageType.SYNTAX);
+            Formatting highlight = ctx.getFormat(EMessageType.HIGHLIGHT);
+            syntax.append(syntaxColor);
+
+            Command command = target.getCommand();
+            ParameterList list = command.getParameterList();
+            Parameter<?, ?> repeated = list.getRepeatedParameter();
+
+            int requiredCount = list.getRequiredCount();
+            List<Parameter<?, ?>> indexedParameters = list.getIndexedParameters();
+            for (int i = 0, n = indexedParameters.size(); i < n; i++) {
+                syntax.append(i < requiredCount ? " <" : " [");
+                Parameter<?, ?> param = indexedParameters.get(i);
+                syntax.append(param.getName());
+                if (param == repeated) {
+                    syntax.append(highlight).append("...").append(syntaxColor);
+                }
+                syntax.append(i < requiredCount ? '>' : ']');
+            }
+
+            Map<String, Parameter<?, ?>> parametersByName = list.getParametersByName();
+            for (Parameter<?, ?> param : parametersByName.values()) {
+                if (param.isFlag()) {
+                    syntax.append(" [").append(param.getName());
+                    if (param.expectsInput()) {
+                        syntax.append(" <").append(param.getName()).append(">");
+                    }
+                    syntax.append(']');
+                }
+            }
+
+        } else {
+            syntax.append(' ');
+        }
+        return syntax.toString();
+    }
+
+}