Added local download links for attachments

boards/models/post/sync.py

@@ -23,6 +23,8 b" TAG_ATTACHMENTS = 'attachments'"
 TAG_ATTACHMENT = 'attachment'
 TAG_TAGS = 'tags'
 TAG_TAG = 'tag'
+TAG_ATTACHMENT_REFS = 'attachment-refs'
+TAG_ATTACHMENT_REF = 'attachment-ref'
 
 TYPE_GET = 'get'
 
@@ -32,6 +34,8 b" ATTR_NAME = 'name'"
 ATTR_VALUE = 'value'
 ATTR_MIMETYPE = 'mimetype'
 ATTR_KEY = 'key'
+ATTR_REF = 'ref'
+ATTR_URL = 'url'
 
 STATUS_SUCCESS = 'success'
 
@@ -79,16 +83,16 b' class SyncManager:'
             attachments = post.attachments.all()
             if len(images) > 0 or len(attachments) > 0:
                 attachments_tag = et.SubElement(content_tag, TAG_ATTACHMENTS)
+                attachment_refs = et.SubElement(model, TAG_ATTACHMENT_REFS)
+
                 for image in images:
-                    mimetype = get_file_mimetype(image.image.file)
-                    attachment = et.SubElement(attachments_tag, TAG_ATTACHMENT)
-                    attachment.set(ATTR_MIMETYPE, mimetype)
-                    attachment.text = image.hash
+                    SyncManager._attachment_to_xml(
+                        attachments_tag, attachment_refs, image.image.file,
+                        image.hash, image.image.url)
                 for file in attachments:
-                    mimetype = get_file_mimetype(file.file.file)
-                    attachment = et.SubElement(attachments_tag, TAG_ATTACHMENT)
-                    attachment.set(ATTR_MIMETYPE, mimetype)
-                    attachment.text = file.hash
+                    SyncManager._attachment_to_xml(
+                        attachments_tag, attachment_refs, file.file.file,
+                        file.hash, file.file.url)
 
             signatures_tag = et.SubElement(model, TAG_SIGNATURES)
             post_signatures = post.global_id.signature_set.all()
@@ -216,3 +220,14 b' class SyncManager:'
             signatures.append(signature)
 
         return signatures
+
+    @staticmethod
+    def _attachment_to_xml(tag_attachments, tag_refs, file, hash, url):
+        mimetype = get_file_mimetype(file)
+        attachment = et.SubElement(tag_attachments, TAG_ATTACHMENT)
+        attachment.set(ATTR_MIMETYPE, mimetype)
+        attachment.text = hash
+
+        attachment_ref = et.SubElement(tag_refs, TAG_ATTACHMENT_REF)
+        attachment_ref.set(ATTR_REF, hash)
+        attachment_ref.set(ATTR_URL, url)