plugin comp file sharing: file sharing management first draft:

the new "component file sharing management" plugin add ad-hoc commands to changes permission of one or several shared files, delete one or more files, or regenerate thumbnails.
This is a temporary plugin to make file sharing through a component usable with other entities, but should be removed (at least permission management and file deletion) in the future if we move on a pubsub based solution.

sat/plugins/plugin_comp_file_sharing.py

@@ -44,6 +44,7 @@ PLUGIN_INFO = {
     C.PI_PROTOCOLS: [],
     C.PI_DEPENDENCIES: [
         "FILE",
+        "FILE_SHARING_MANAGEMENT",
         "XEP-0231",
         "XEP-0234",
         "XEP-0260",
@@ -219,6 +220,9 @@ class FileSharing(object):
 
         # we only use the first found file
         found_file = found_files[0]
+        if found_file[u'type'] != C.FILE_TYPE_FILE:
+            raise TypeError(u"a file was expected, type is {type_}".format(
+                type_=found_file[u'type']))
         file_hash = found_file[u"file_hash"]
         file_path = os.path.join(self.files_path, file_hash)
         file_data[u"hash_hasher"] = hasher = self._h.getHasher(found_file[u"hash_algo"])