# HG changeset patch
# User Goffi <goffi@goffi.org>
# Date 1520009611 -3600
# Node ID 4440ea7047bdc138966c5c6d584ddd0c17a2deb7
# Parent  2d3c9dcec384a0c502a3b43d97f3a8aaff147a5d
file sharing component: thumbnails integration first draft:

if an uploaded file is detected as an image, 2 thumbnails (small and medium size) are generated automatically.

diff -r 2d3c9dcec384 -r 4440ea7047bd src/plugins/plugin_comp_file_sharing.py
--- a/src/plugins/plugin_comp_file_sharing.py	Fri Mar 02 17:53:31 2018 +0100
+++ b/src/plugins/plugin_comp_file_sharing.py	Fri Mar 02 17:53:31 2018 +0100
@@ -27,6 +27,7 @@
 from twisted.internet import defer
 import os
 import os.path
+import mimetypes
 
 
 PLUGIN_INFO = {
@@ -35,14 +36,13 @@
     C.PI_MODES: [C.PLUG_MODE_COMPONENT],
     C.PI_TYPE: C.PLUG_TYPE_ENTRY_POINT,
     C.PI_PROTOCOLS: [],
-    C.PI_DEPENDENCIES: ["FILE", "XEP-0234", "XEP-0260", "XEP-0261", "XEP-0329"],
+    C.PI_DEPENDENCIES: ["FILE", "XEP-0234", "XEP-0260", "XEP-0261", "XEP-0264", "XEP-0329"],
     C.PI_RECOMMENDATIONS: [],
     C.PI_MAIN: "FileSharing",
     C.PI_HANDLER: "no",
     C.PI_DESCRIPTION: _(u"""Component hosting and sharing files""")
 }
 
-PROGRESS_ID_KEY = 'progress_id'
 HASH_ALGO = u'sha-256'
 
 
@@ -54,6 +54,7 @@
         self._f = host.plugins['FILE']
         self._jf = host.plugins['XEP-0234']
         self._h = host.plugins['XEP-0300']
+        self._t = host.plugins['XEP-0264']
         host.trigger.add("FILE_getDestDir", self._getDestDirTrigger)
         host.trigger.add("XEP-0234_fileSendingRequest", self._fileSendingRequestTrigger, priority=1000)
         self.files_path = host.getLocalPath(None, C.FILES_DIR, profile=False)
@@ -68,6 +69,9 @@
 
     @defer.inlineCallbacks
     def _fileTransferedCb(self, dummy, client, peer_jid, file_data, file_path):
+        name = file_data[u'name']
+        extra = {}
+
         if file_data[u'hash_algo'] == HASH_ALGO:
             log.debug(_(u"Reusing already generated hash"))
             file_hash = file_data[u'hash_hasher'].hexdigest()
@@ -76,28 +80,49 @@
             with open('file_path') as f:
                 file_hash = yield self._h.calculateHash(f, hasher)
         final_path = os.path.join(self.files_path, file_hash)
+
         if os.path.isfile(final_path):
             log.debug(u"file [{file_hash}] already exists, we can remove temporary one".format(file_hash = file_hash))
             os.unlink(file_path)
         else:
             os.rename(file_path, final_path)
             log.debug(u"file [{file_hash}] moved to {files_path}".format(file_hash=file_hash, files_path=self.files_path))
+
+        mime_type = file_data.get(u'mime_type')
+        if not mime_type or mime_type == u'application/octet-stream':
+            mime_type = mimetypes.guess_type(name)[0]
+
+        if mime_type is not None and mime_type.startswith(u'image'):
+            thumbnails = extra.setdefault(C.KEY_THUMBNAILS, [])
+            for max_thumb_size in (self._t.SIZE_SMALL, self._t.SIZE_MEDIUM):
+                try:
+                    thumb_size, thumb_id = yield self._t.generateThumbnail(final_path,
+                                                                           max_thumb_size,
+                                                                           # we keep thumbnails for 6 months
+                                                                           60*60*24*31*6)
+                except Exception as e:
+                    log.warning(_(u"Can't create thumbnail: {reason}").format(reason=e))
+                    break
+                thumbnails.append({u'id': thumb_id, u'size': thumb_size})
+
         self.host.memory.setFile(client,
-                                 name=file_data[u'name'],
+                                 name=name,
                                  version=u'',
                                  file_hash=file_hash,
                                  hash_algo=HASH_ALGO,
                                  size=file_data[u'size'],
                                  path=file_data.get(u'path'),
                                  namespace=file_data.get(u'namespace'),
-                                 owner=peer_jid)
+                                 mime_type=mime_type,
+                                 owner=peer_jid,
+                                 extra=extra)
 
     def _getDestDirTrigger(self, client, peer_jid, transfer_data, file_data, stream_object):
         if not client.is_component:
             return True, None
         assert stream_object
         assert 'stream_object' not in transfer_data
-        assert PROGRESS_ID_KEY in file_data
+        assert C.KEY_PROGRESS_ID in file_data
         filename = file_data['name']
         assert filename and not '/' in filename
         file_tmp_dir = self.host.getLocalPath(client, C.FILES_TMP_DIR, peer_jid.userhost(), component=True, profile=False)