Merge pull request #557 from Bastian/improve-channel-types

Enhance ChannelType with more information

javacord-api/src/main/java/org/javacord/api/entity/channel/ChannelType.java

@@ -1,31 +1,55 @@
 package org.javacord.api.entity.channel;
 
+import java.util.Arrays;
+
 /**
  * A enum with all different channel types.
  */
 public enum ChannelType {
 
-    SERVER_TEXT_CHANNEL(0),
-    PRIVATE_CHANNEL(1),
-    SERVER_VOICE_CHANNEL(2),
-    GROUP_CHANNEL(3),
-    CHANNEL_CATEGORY(4),
-    SERVER_NEWS_CHANNEL(5),
-    SERVER_STORE_CHANNEL(6),
-    UNKNOWN(-1);
+    SERVER_TEXT_CHANNEL(0, true, false, true),
+    PRIVATE_CHANNEL(1, true, true, false),
+    SERVER_VOICE_CHANNEL(2, false, true, true),
+    GROUP_CHANNEL(3, true, true, false),
+    CHANNEL_CATEGORY(4, false, false, true),
+    SERVER_NEWS_CHANNEL(5, true, false, true),
+    SERVER_STORE_CHANNEL(6, true, false, true),
+    UNKNOWN(-1, false, false, false);
+
+    private static final ChannelType[] textChannelTypes = Arrays.stream(ChannelType.values())
+            .filter(ChannelType::isTextChannelType)
+            .toArray(ChannelType[]::new);
+
+    private static final ChannelType[] voiceChannelTypes = Arrays.stream(ChannelType.values())
+            .filter(ChannelType::isVoiceChannelType)
+            .toArray(ChannelType[]::new);
+
+    private static final ChannelType[] serverChannelTypes = Arrays.stream(ChannelType.values())
+            .filter(ChannelType::isServerChannelType)
+            .toArray(ChannelType[]::new);
 
     /**
      * The id of the channel type.
      */
     private final int id;
 
+    private final boolean textChannelType;
+    private final boolean voiceChannelType;
+    private final boolean serverChannelType;
+
     /**
      * Creates a new channel type.
      *
      * @param id The id of the channel type.
+     * @param textChannelType Whether this type is a text channel type or not.
+     * @param voiceChannelType Whether this type is a voice channel type or not.
+     * @param serverChannelType Whether this type is a server channel type or not.
      */
-    ChannelType(int id) {
+    ChannelType(int id, boolean textChannelType, boolean voiceChannelType, boolean serverChannelType) {
         this.id = id;
+        this.textChannelType = textChannelType;
+        this.voiceChannelType = voiceChannelType;
+        this.serverChannelType = serverChannelType;
     }
 
     /**
@@ -37,6 +61,33 @@ public int getId() {
         return id;
     }
 
+    /**
+     * Checks if this type is a text channel type.
+     *
+     * @return Whether this type is a text channel type or not.
+     */
+    public boolean isTextChannelType() {
+        return textChannelType;
+    }
+
+    /**
+     * Checks if this type is a voice channel type.
+     *
+     * @return Whether this type is a voice channel type or not.
+     */
+    public boolean isVoiceChannelType() {
+        return voiceChannelType;
+    }
+
+    /**
+     * Checks if this type is a server channel type.
+     *
+     * @return Whether this type is a server channel type or not.
+     */
+    public boolean isServerChannelType() {
+        return serverChannelType;
+    }
+
     /**
      * Gets a channel type by its id.
      *
@@ -52,4 +103,30 @@ public static ChannelType fromId(int id) {
         return UNKNOWN;
     }
 
+    /**
+     * Gets an array with all types that are text channel types.
+     *
+     * @return All types that are text channel types.
+     */
+    public static ChannelType[] getTextChannelTypes() {
+        return textChannelTypes;
+    }
+
+    /**
+     * Gets an array with all type that are voice channel types.
+     *
+     * @return All types that are voice channel types.
+     */
+    public static ChannelType[] getVoiceChannelTypes() {
+        return voiceChannelTypes;
+    }
+
+    /**
+     * Gets an array with all types that are server channel types.
+     *
+     * @return All types that are server channel types.
+     */
+    public static ChannelType[] getServerChannelTypes() {
+        return serverChannelTypes;
+    }
 }