Paper/CraftBukkit-Patches/0067-Fix-links-in-chat.patch

From 64706e7d04a86c6916f0cfe1decb0f5eaf2db38e Mon Sep 17 00:00:00 2001
From: Thinkofdeath <purggames@gmail.com>
Date: Sun, 1 Dec 2013 10:33:55 +0000
Subject: [PATCH] Fix links in chat


diff --git a/src/main/java/org/bukkit/craftbukkit/util/CraftChatMessage.java b/src/main/java/org/bukkit/craftbukkit/util/CraftChatMessage.java
index cc8e715..5d6ce54 100644
--- a/src/main/java/org/bukkit/craftbukkit/util/CraftChatMessage.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/CraftChatMessage.java
@@ -3,11 +3,15 @@ package org.bukkit.craftbukkit.util;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 
 import net.minecraft.server.ChatComponentText;
 import net.minecraft.server.ChatModifier;
 import net.minecraft.server.EnumChatFormat;
 import net.minecraft.server.IChatBaseComponent;
+import net.minecraft.server.ChatClickable;
+import net.minecraft.server.EnumClickAction;
 
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.ImmutableMap.Builder;
@@ -29,6 +33,8 @@ public final class CraftChatMessage {
         private ChatModifier modifier = new ChatModifier();
         private StringBuilder builder = new StringBuilder();
         private final IChatBaseComponent[] output;
+        private static final Pattern url = Pattern.compile("^(\u00A7.)*?((?:(https?)://)?([-\\w_\\.]{2,}\\.[a-z]{2,4})(/\\S*?)?)(\u00A7.)*?$");
+        private int lastWord = 0;
 
         private FromString(String message) {
             if (message == null) {
@@ -38,10 +44,13 @@ public final class CraftChatMessage {
             list.add(currentChatComponent);
 
             EnumChatFormat format = null;
+            Matcher matcher = url.matcher(message);
+            lastWord = 0;
 
             for (int i = 0; i < message.length(); i++) {
                 char currentChar = message.charAt(i);
                 if (currentChar == '\u00A7' && (i < (message.length() - 1)) && (format = formatMap.get(message.charAt(i + 1))) != null) {
+                    checkUrl(matcher, message, i, false);
                     if (builder.length() > 0) {
                         appendNewComponent();
                     }
@@ -78,6 +87,11 @@ public final class CraftChatMessage {
                     }
                     currentChatComponent = null;
                 } else {
+                    if (currentChar == ' ' || i == message.length() - 1) {
+                        if (checkUrl(matcher, message, i, true)) {
+                            break;
+                        }
+                    }
                     builder.append(currentChar);
                 }
             }
@@ -89,6 +103,36 @@ public final class CraftChatMessage {
             output = list.toArray(new IChatBaseComponent[0]);
         }
 
+        private boolean checkUrl(Matcher matcher, String message, int i, boolean newWord) {
+            Matcher urlMatcher = matcher.region(lastWord, i == message.length() - 1 ? message.length() : i);
+            if (newWord) {
+                lastWord = i + 1;
+            }
+            if (urlMatcher.find()) {
+                String fullUrl = urlMatcher.group(2);
+                String protocol = urlMatcher.group(3);
+                String url = urlMatcher.group(4);
+                String path = urlMatcher.group(5);
+                builder.delete(builder.length() - fullUrl.length() + (i == message.length() - 1 ? 1 : 0), builder.length());
+                if (builder.length() > 0) {
+                    appendNewComponent();
+                }
+                builder.append(fullUrl);
+                ChatClickable link = new ChatClickable(EnumClickAction.OPEN_URL,
+                        (protocol!=null?protocol:"http") + "://" + url + (path!=null?path:""));
+                modifier.a(link);
+                appendNewComponent();
+                modifier.a((ChatClickable) null);
+                if (!newWord) { //Force new word to prevent double checking
+                    lastWord = i + 1;
+                }
+                if (i == message.length() - 1) {
+                    return true;
+                }
+            }
+            return false;
+        }
+
         private void appendNewComponent() {
             IChatBaseComponent addition = new ChatComponentText(builder.toString()).setChatModifier(modifier);
             builder = new StringBuilder();
-- 
1.8.4.msysgit.0