Add attachment flags

javacord-api/src/main/java/org/javacord/api/entity/Attachment.java

@@ -6,6 +6,7 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.URL;
+import java.util.EnumSet;
 import java.util.Optional;
 import java.util.concurrent.CompletableFuture;
 
@@ -100,11 +101,18 @@ default boolean isImage() {
     /**
      * Gets the base64 encoded string of the waveform of the audio file
      * Only present if the message is of type {@link MessageFlag#IS_VOICE_MESSAGE}.
-     * 
+     *
      * @return The base64 encoded string of the waveform of the audio file.
      */
     Optional<String> getWaveFormBase64();
 
+    /**
+     * Gets the flags of the attachment.
+     *
+     * @return The flags of the attachment.
+     */
+    EnumSet<AttachmentFlag> getFlags();
+
     /**
      * Downloads the attachment as an input stream.
      *

javacord-api/src/main/java/org/javacord/api/entity/AttachmentFlag.java

@@ -0,0 +1,49 @@
+package org.javacord.api.entity;
+
+public enum AttachmentFlag {
+    /**
+     * This attachment has been edited using the remix feature on mobile.
+     */
+    IS_REMIX(1 << 2),
+
+    /**
+     * The unknown message flag type.
+     */
+    UNKNOWN(-1);
+
+    private final int id;
+
+    /**
+     * Creates a new attachment flags type.
+     *
+     * @param id attachment flags id.
+     */
+    AttachmentFlag(final int id) {
+        this.id = id;
+    }
+
+    /**
+     * Gets the id of the attachment flags type.
+     *
+     * @return The id of the attachment flags type.
+     */
+    public int getId() {
+        return this.id;
+    }
+
+    /**
+     * Gets the attashment flags type by its id.
+     *
+     * @param id The id of the attachment flag type.
+     * @return The attachment flag type with the given id or {@link AttachmentFlag#UNKNOWN} if unknown id.
+     */
+    public static AttachmentFlag getFlagTypeById(final int id) {
+        for (final AttachmentFlag value : values()) {
+            if (value.getId() == id) {
+                return value;
+            }
+        }
+        return UNKNOWN;
+    }
+
+}

javacord-core/src/main/java/org/javacord/core/entity/AttachmentImpl.java

@@ -6,6 +6,7 @@
 import org.apache.logging.log4j.Logger;
 import org.javacord.api.DiscordApi;
 import org.javacord.api.entity.Attachment;
+import org.javacord.api.entity.AttachmentFlag;
 import org.javacord.api.entity.DiscordEntity;
 import org.javacord.core.util.FileContainer;
 import org.javacord.core.util.logging.LoggerUtil;
@@ -16,6 +17,7 @@
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.util.Base64;
+import java.util.EnumSet;
 import java.util.Objects;
 import java.util.Optional;
 import java.util.concurrent.CompletableFuture;
@@ -76,7 +78,7 @@ public class AttachmentImpl implements Attachment {
      * Whether this attachment is ephemeral.
      */
     private final Boolean ephemeral;
-    
+
     /**
      * The duration of the audio file.
      */
@@ -87,6 +89,11 @@ public class AttachmentImpl implements Attachment {
      */
     private final String waveform;
 
+    /**
+     * Attachment flags computed from the bitfield.
+     */
+    private final EnumSet<AttachmentFlag> attachmentFlags = EnumSet.noneOf(AttachmentFlag.class);
+
     /**
      * Creates a new attachment.
      *
@@ -106,6 +113,14 @@ public AttachmentImpl(DiscordApi api, final JsonNode data) {
         ephemeral = data.hasNonNull("ephemeral") ? data.get("ephemeral").asBoolean() : null;
         durationSeconds = data.hasNonNull("duration_secs") ? data.get("duration_secs").doubleValue() : null;
         waveform = data.hasNonNull("waveform") ? data.get("waveform").asText() : null;
+        if (data.has("flags")) {
+            int flags = data.get("flags").asInt();
+            for (AttachmentFlag flag : AttachmentFlag.values()) {
+                if ((flag.getId() & flags) == flag.getId()) {
+                    attachmentFlags.add(flag);
+                }
+            }
+        }
     }
 
     @Override
@@ -183,6 +198,11 @@ public Optional<String> getWaveFormBase64() {
         return Optional.ofNullable(waveform);
     }
 
+    @Override
+    public EnumSet<AttachmentFlag> getFlags() {
+        return attachmentFlags;
+    }
+
     @Override
     public InputStream asInputStream() throws IOException {
         return new FileContainer(getUrl()).asInputStream(getApi());