Added MessageEmbed#isEmpty and fixed MessageAction not allowing to send embeds with just an image set

Author: MinnDevelopment

src/main/java/net/dv8tion/jda/core/entities/MessageEmbed.java

@@ -25,7 +25,9 @@
 import java.awt.Color;
 import java.time.OffsetDateTime;
 import java.time.format.DateTimeFormatter;
-import java.util.*;
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
 
 /**
  * Represents an embed displayed by Discord.
@@ -281,6 +283,18 @@ public OffsetDateTime getTimestamp()
         return timestamp;
     }
 
+    /**
+     * Whether this embed is empty.
+     *
+     * @return True, if this embed has no content
+     */
+    public boolean isEmpty()
+    {
+        return getLength() == 0
+            && getImage() == null
+            && getThumbnail() == null;
+    }
+
     /**
      * The total amount of characters that is displayed when this embed is displayed by the Discord client.
      *
@@ -344,6 +358,8 @@ public boolean isSendable(AccountType type)
     {
         Checks.notNull(type, "AccountType");
         final int length = getLength();
+        if (isEmpty())
+            return false;
 
         switch (type)
         {

src/main/java/net/dv8tion/jda/core/requests/restaction/MessageAction.java

@@ -103,8 +103,7 @@ public MessageAction(JDA api, Route.CompiledRoute route, MessageChannel channel,
     public boolean isEmpty()
     {
         return Helpers.isBlank(content)
-            && (!hasPermission(Permission.MESSAGE_EMBED_LINKS)
-                || embed == null || embed.getLength() == 0);
+            && (embed == null || embed.isEmpty() || !hasPermission(Permission.MESSAGE_EMBED_LINKS));
     }
 
     /**
@@ -248,7 +247,7 @@ public MessageAction embed(final MessageEmbed embed)
         {
             final AccountType type = getJDA().getAccountType();
             Checks.check(embed.isSendable(type),
-                "Provided Message contains an embed with a length greater than %d characters, which is the max for %s accounts!",
+                "Provided Message contains an empty embed or an embed with a length greater than %d characters, which is the max for %s accounts!",
                 type == AccountType.BOT ? MessageEmbed.EMBED_MAX_LENGTH_BOT : MessageEmbed.EMBED_MAX_LENGTH_CLIENT, type);
         }
         this.embed = embed;

src/main/java/net/dv8tion/jda/webhook/WebhookMessageBuilder.java

@@ -124,7 +124,7 @@ public WebhookMessageBuilder addEmbeds(MessageEmbed... embeds)
         {
             Checks.notNull(embed, "Embed");
             Checks.check(embed.isSendable(AccountType.BOT),
-                "One of the provided embeds exceeds the maximum character count of %d!", MessageEmbed.EMBED_MAX_LENGTH_BOT);
+                "One of the provided embeds is empty or exceeds the maximum character count of %d!", MessageEmbed.EMBED_MAX_LENGTH_BOT);
             this.embeds.add(embed);
         }
         return this;
@@ -152,7 +152,7 @@ public WebhookMessageBuilder addEmbeds(Collection<MessageEmbed> embeds)
         {
             Checks.notNull(embed, "Embed");
             Checks.check(embed.isSendable(AccountType.BOT),
-                "One of the provided embeds exceeds the maximum character count of %d!", MessageEmbed.EMBED_MAX_LENGTH_BOT);
+                "One of the provided embeds is empty or exceeds the maximum character count of %d!", MessageEmbed.EMBED_MAX_LENGTH_BOT);
             this.embeds.add(embed);
         }
         return this;