MessageService implementation

src/main/java/Service/MessageService.java

@@ -0,0 +1,36 @@
+package Service;
+
+import Model.Message;
+import DAO.MessageDAO;
+import DAO.AccountDAO;
+
+public class MessageService {
+    MessageDAO messageDAO;
+    AccountDAO accountDAO;
+
+    public MessageService() {
+        messageDAO = new MessageDAO();
+        accountDAO = new AccountDAO();
+    }
+
+    public MessageService(MessageDAO messageDAO){
+        this.messageDAO = messageDAO;
+        accountDAO = new AccountDAO();
+    }
+
+    public MessageService(MessageDAO messageDAO, AccountDAO accountDAO) {
+        this.messageDAO = messageDAO;
+        this.accountDAO = accountDAO;
+    }
+
+    public boolean messageIsValid(int posted_by, String message_text) {
+        if (message_text.length() == 0 || message_text.length() > 255) return false;
+        else if (accountDAO.findAccountByAccountId(posted_by) == null) return false;
+        else return true;
+    }
+
+    public Message insertMessage(int posted_by, String message_text, long time_posted_epoch) {
+        return messageDAO.insertMessage(posted_by, message_text, time_posted_epoch);
+    }
+
+}