From 94073b43b3abd6b31f2b4db6568cafd0547a6cd5 Mon Sep 17 00:00:00 2001
From: jomu <jomu@711a9084-f618-47a6-a783-754c49204487>
Date: Wed, 5 Jul 2017 08:07:15 +0000
Subject: [PATCH] added possibility to limit the amount of emails to be read

---
 .../network/mail/DefaultMailReader.java       | 37 +++++++++++++++++++
 .../shared/network/mail/MailReader.java       | 11 ++++++
 2 files changed, 48 insertions(+)

diff --git a/network/src/main/java/de/muehlencord/shared/network/mail/DefaultMailReader.java b/network/src/main/java/de/muehlencord/shared/network/mail/DefaultMailReader.java
index a20a2a1..7e13f66 100644
--- a/network/src/main/java/de/muehlencord/shared/network/mail/DefaultMailReader.java
+++ b/network/src/main/java/de/muehlencord/shared/network/mail/DefaultMailReader.java
@@ -307,6 +307,43 @@ public abstract class DefaultMailReader implements MailReader {
 
         return returnValue;
     }
+    
+    /**
+     * retrieves the list of messages stored in the given folder
+     *
+     * @param sourceFolder the folder to search return the emails for
+     * @param start the number of the first message
+     * @param end the number of the last message
+     * @return list of messages stored in the given folder
+     *
+     * @throws MailReaderException if the message list cannot be retrieved
+     *
+     */
+    @Override
+    public List<MailMessage> getMessages(String sourceFolder, int start, int end) throws MailReaderException {
+        List<MailMessage> returnValue = new LinkedList<>();
+        Folder folder = getFolderObject(sourceFolder);
+        try {
+            folder.open(Folder.READ_ONLY);
+            Message[] messages = folder.getMessages(start, end);
+            for (Message msg : messages) {
+                returnValue.add(MailMessageUtils.getInstance(getValidMessage(msg)));
+            }
+        } catch (Exception ex) {
+            throw new MailReaderException("Cannot fetch email from folder " + folder.getFullName() + ". Reason: " + ex.getMessage(), ex);
+
+        } finally {
+            if ((folder != null) && (folder.isOpen())) {
+                try {
+                    folder.close(false);
+                } catch (MessagingException ex) {
+                    LOGGER.debug(StringUtil.getStackTraceString(ex));
+                }
+            }
+        }
+
+        return returnValue;
+    }    
 
     /**
      * copies the given message from the source folder to the destination folder
diff --git a/network/src/main/java/de/muehlencord/shared/network/mail/MailReader.java b/network/src/main/java/de/muehlencord/shared/network/mail/MailReader.java
index a22416d..ca7a38d 100644
--- a/network/src/main/java/de/muehlencord/shared/network/mail/MailReader.java
+++ b/network/src/main/java/de/muehlencord/shared/network/mail/MailReader.java
@@ -70,6 +70,17 @@ public interface MailReader {
      *
      */
     List<MailMessage> getMessages(String folder) throws MailReaderException;
+    
+    /**
+     * retrieves the list of messages stored in the given folder
+     *
+     * @param folder the folder to search return the emails for
+     * @return list of messages stored in the given folder
+     *
+     * @throws MailReaderException if the message list cannot be retrieved
+     *
+     */
+    List<MailMessage> getMessages(String folder, int start, int end) throws MailReaderException;    
 
     /**
      * copies the given message from the source folder to the destination folder