1 files changed, 127 insertions, 0 deletions
diff --git a/src/main/java/de/thedevstack/conversationsplus/services/filetransfer/FileTransferManager.java b/src/main/java/de/thedevstack/conversationsplus/services/filetransfer/FileTransferManager.java
new file mode 100644
index 00000000..f7b3f4e2
--- /dev/null
+++ b/src/main/java/de/thedevstack/conversationsplus/services/filetransfer/FileTransferManager.java
@@ -0,0 +1,127 @@
+package de.thedevstack.conversationsplus.services.filetransfer;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.SortedSet;
+import java.util.TreeSet;
+
+import de.thedevstack.android.logcat.Logging;
+import de.thedevstack.conversationsplus.Config;
+import de.thedevstack.conversationsplus.entities.Message;
+import de.thedevstack.conversationsplus.services.FileTransferService;
+
+/**
+ *
+ */
+public class FileTransferManager implements FileTransferService {
+    private SortedSet<WeightedTransferService> transferServices;
+    private static final FileTransferManager INSTANCE = new FileTransferManager();
+
+    private FileTransferManager() {
+        this.transferServices = new TreeSet<>();
+    }
+
+    public static FileTransferManager getInstance() {
+        return INSTANCE;
+    }
+
+    public static void init(FileTransferService... fileTransferServices) {
+        if (null != fileTransferServices && fileTransferServices.length > 0) {
+            for (FileTransferService fts : fileTransferServices) {
+                addFileTransferService(fts);
+            }
+        }
+    }
+
+    public static void init(HashMap<Integer, FileTransferService> fileTransferServices) {
+        for (Map.Entry<Integer, FileTransferService> entry : fileTransferServices.entrySet()) {
+            addFileTransferService(entry.getKey(), entry.getValue());
+        }
+    }
+
+    public static void addFileTransferService(int weight, FileTransferService fts) {
+        INSTANCE.transferServices.add(new WeightedTransferService(weight, fts));
+    }
+
+    public static void addFileTransferService(FileTransferService fts) {
+        int weight = 1;
+        if (!INSTANCE.transferServices.isEmpty()) {
+            weight = INSTANCE.transferServices.last().weight + 1;
+        }
+        addFileTransferService(weight, fts);
+    }
+
+    /**
+     * 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
+     */
+    public boolean transferFile(Message message) {
+        return this.transferFile(message, false);
+    }
+
+    /**
+     * 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
+     */
+    @Override
+    public boolean transferFile(Message message, boolean delay) {
+        Logging.d(Config.LOGTAG, "send file message");
+        boolean transferSuccessfullyStarted = false;
+        for (WeightedTransferService wts : this.transferServices) {
+            try {
+                if (wts.fileTransferService.accept(message)) {
+                    transferSuccessfullyStarted = wts.fileTransferService.transferFile(message, delay);
+                    if (transferSuccessfullyStarted) {
+                        break;
+                    }
+                }
+            } catch (Exception e) {
+                //TODO Do real exception handling!!!!!
+            }
+        }
+        return transferSuccessfullyStarted;
+    }
+
+    /**
+     * 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
+     */
+    @Override
+    public boolean accept(Message message) {
+        return message.needsUploading();
+    }
+
+    static class WeightedTransferService implements Comparable<WeightedTransferService> {
+        int weight;
+        FileTransferService fileTransferService;
+
+        WeightedTransferService(int weight, FileTransferService service) {
+            this.weight = weight;
+            this.fileTransferService = service;
+        }
+
+        /**
+         * Compares this object to the specified object to determine their relative
+         * order.
+         *
+         * @param another the object to compare to this instance.
+         * @return a negative integer if this instance is less than {@code another};
+         * a positive integer if this instance is greater than
+         * {@code another}; 0 if this instance has the same order as
+         * {@code another}.
+         * @throws ClassCastException if {@code another} cannot be converted into something
+         *                            comparable to {@code this} instance.
+         */
+        @Override
+        public int compareTo(WeightedTransferService another) {
+            return this.weight - another.weight;
+        }
+    }
+}