Add handler for parsing channel and nickname prefixes.

[xudocci.git] / src / main / java / net / pterodactylus / irc / connection / PrefixHandler.java

diff --git a/src/main/java/net/pterodactylus/irc/connection/PrefixHandler.java b/src/main/java/net/pterodactylus/irc/connection/PrefixHandler.java
new file mode 100644 (file)
index 0000000..51e0b86
--- /dev/null
+++ b/src/main/java/net/pterodactylus/irc/connection/PrefixHandler.java
@@ -0,0 +1,84 @@
+package net.pterodactylus.irc.connection;
+
+import static java.lang.String.format;
+import static java.lang.String.valueOf;
+import static org.apache.log4j.Logger.getLogger;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import net.pterodactylus.irc.Connection;
+import net.pterodactylus.irc.Reply;
+
+import com.google.common.eventbus.EventBus;
+import org.apache.log4j.Logger;
+
+/**
+ * Parses the server’s messages about which prefixes it understands for
+ * channels and nicknames.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public class PrefixHandler implements Handler {
+
+       private static final Logger logger =
+                       getLogger(PrefixHandler.class);
+
+       private final Map<String, String> nickPrefixes = new HashMap<>();
+       private final Set<Character> channelTypes = new HashSet<>();
+
+       @Override
+       public boolean willHandle(Reply reply) {
+               return "005".equals(reply.command());
+       }
+
+       @Override
+       public void handleReply(Reply reply) {
+               List<String> parameters = reply.parameters();
+
+               for (String parameter : parameters) {
+                       if (parameter.startsWith("PREFIX=")) {
+                               parseNickPrefixes(parameter);
+                       } else if (parameter.startsWith("CHANTYPES=")) {
+                               parseChannelTypes(parameter);
+                       }
+               }
+       }
+
+       public boolean isChannel(String receiver) {
+               return channelTypes.contains(receiver.charAt(0));
+       }
+
+       public boolean isNickPrefixed(String nick) {
+               return nickPrefixes.containsKey(nick.substring(0, 1));
+       }
+
+       private void parseNickPrefixes(String parameter) {
+               int openParen = parameter.indexOf('(');
+               int closeParen = parameter.indexOf(')');
+               if ((openParen != -1) && (closeParen != -1)) {
+                       for (int modeCharacterIndex = 1;
+                                modeCharacterIndex < (closeParen - openParen);
+                                ++modeCharacterIndex) {
+                               char modeCharacter = parameter.charAt(
+                                               openParen + modeCharacterIndex);
+                               char modeSymbol = parameter.charAt(
+                                               closeParen + modeCharacterIndex);
+                               nickPrefixes.put(valueOf(modeSymbol),
+                                               valueOf(modeCharacter));
+                       }
+                       logger.debug(format("Parsed Prefixes: %s", nickPrefixes));
+               }
+       }
+
+       private void parseChannelTypes(String parameter) {
+               for (char channelType : parameter.substring(10).toCharArray()) {
+                       channelTypes.add(channelType);
+               }
+               logger.debug(format("Parsed Channel Types: %s", channelTypes));
+       }
+
+}