add ephemeral

Author: vusters

src/main/java/allbegray/slack/webapi/SlackWebApiConstants.java

@@ -43,6 +43,7 @@ public interface SlackWebApiConstants {
 	String CHAT_POST_MESSAGE = "chat.postMessage";
 	String CHAT_UPDATE = "chat.update";
 	String CHAT_UNFURL = "chat.unfurl";
+	String CHAT_POST_EPHEMERAL = "chat.postEphemeral";
 
 	// dnd
 	String DND_END_DND = "dnd.endDnd";

src/main/java/allbegray/slack/webapi/method/chats/ChatPostEphemeral.java

@@ -0,0 +1,67 @@
+package allbegray.slack.webapi.method.chats;
+
+import allbegray.slack.exception.SlackException;
+import allbegray.slack.type.Attachment;
+import allbegray.slack.validation.ValidationError;
+import allbegray.slack.webapi.SlackWebApiConstants;
+import allbegray.slack.webapi.method.AbstractMethod;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+public class ChatPostEphemeral extends AbstractMethod {
+    protected String channel;
+    protected String user;
+    protected String text;
+    protected List<Attachment> attachments;
+
+    protected ObjectMapper mapper;
+
+    public ChatPostEphemeral(String channel, String user) {
+        this.channel = channel;
+        this.user = user;
+    }
+
+    public void setText(String text) {
+        this.text = text;
+    }
+
+    public void setAttachments(List<Attachment> attachments) {
+        this.attachments = attachments;
+    }
+
+    public void addAttachment(Attachment attachment) {
+        if (attachments == null) {
+            attachments = new ArrayList<>();
+        }
+        attachments.add(attachment);
+    }
+
+    @Override
+    public String getMethodName() {
+        return SlackWebApiConstants.CHAT_POST_EPHEMERAL;
+    }
+
+    @Override
+    public void validate(List<ValidationError> errors) {
+
+    }
+
+    @Override
+    protected void createParameters(Map<String, String> parameters) {
+        parameters.put("channel", channel);
+        parameters.put("user", user);
+        parameters.put("text", text);
+
+        if (attachments != null && !attachments.isEmpty()) {
+            try {
+                parameters.put("attachments", mapper.writeValueAsString(attachments));
+            } catch (JsonProcessingException e) {
+                throw new SlackException(e);
+            }
+        }
+    }
+}