1 files changed, 36 insertions, 0 deletions
diff --git a/src/main/java/de/thedevstack/conversationsplus/services/FileTransferService.java b/src/main/java/de/thedevstack/conversationsplus/services/FileTransferService.java
new file mode 100644
index 00000000..300d25e9
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/services/FileTransferService.java
@@ -0,0 +1,36 @@
+package de.thedevstack.conversationsplus.services;
+
+import eu.siacs.conversations.entities.Message;
+import de.thedevstack.conversationsplus.services.filetransfer.FileTransferStatusListener;
+
+/**
+ * An implementation of this class transfers a file to another entity or server.
+ */
+public interface FileTransferService {
+    /**
+     * Transfers a file for the corresponding message.
+     * @param message the message containing the file to transfer
+     * @return <code>true</code> if the file transfer was successful, <code>false</code> otherwise
+     */
+    boolean transferFile(Message message);
+    /**
+     * Transfers a file for the corresponding message.
+     * @param message the message containing the file to transfer
+     * @param delay whether the message is delayed or not
+     * @return <code>true</code> if the file transfer was successful, <code>false</code> otherwise
+     */
+    boolean transferFile(Message message, boolean delay);
+
+    /**
+     * Checks whether a message can be sent using this service or not.
+     * @param message the message to be checked
+     * @return <code>true</code> if the message can be processed, <code>false</code> otherwise
+     */
+    boolean accept(Message message);
+
+    /**
+     * Adds one or more file transfer status listeners.
+     * @param listeners the listeners to add
+     */
+    void addFileTransferStatusListener(FileTransferStatusListener... listeners);
+}