core: added imageCheck and imageResize methods:

imageCheck will give a report on image, notably it will tell if it's too big and needs to
be resized before a transfer.

imageResize will create a new image with the requested size and return a path to it.

sat/core/constants.py

@@ -361,6 +361,13 @@ class Const(object):
     # internationalisation
     DEFAULT_LOCALE = "en_GB"
 
+    # Contexts
+    # context indicate how things are done (e.g. to who/what a file is transfered)
+    # this is useful to make some decision (e.g. image size)
+
+    # something is done in instant messaging
+    CONTEXT_CHAT = "CONTEXT_CHAT"
+
     ## Misc ##
     SAVEFILE_DATABASE = APP_NAME_FILE + ".db"
     IQ_SET = '/iq[@type="set"]'

sat/core/sat_main.py

@@ -40,8 +40,10 @@ from sat.memory import cache
 from sat.memory import encryption
 from sat.tools import async_trigger as trigger
 from sat.tools import utils
+from sat.tools import images
 from sat.tools.common import dynamic_import
 from sat.tools.common import regex
+from sat.tools.common import data_format
 from sat.stdui import ui_contact_list, ui_profile_manager
 import sat.plugins
 
@@ -161,6 +163,8 @@ class SAT(service.Service):
         self.bridge.register_method("loadParamsTemplate", self.memory.load_xml)
         self.bridge.register_method("sessionInfosGet", self.getSessionInfos)
         self.bridge.register_method("namespacesGet", self.getNamespaces)
+        self.bridge.register_method("imageCheck", self._imageCheck)
+        self.bridge.register_method("imageResize", self._imageResize)
 
         self.memory.initialized.addCallback(self._postMemoryInit)
 
@@ -632,6 +636,17 @@ class SAT(service.Service):
             }
         return defer.succeed(data)
 
+    # images
+
+    def _imageCheck(self, path):
+        report = images.checkImage(self, path)
+        return data_format.serialise(report)
+
+    def _imageResize(self, path, width, height):
+        d = images.resizeImage(path, (width, height))
+        d.addCallback(lambda new_image_path: str(new_image_path))
+        return d
+
     # local dirs
 
     def getLocalPath(self, client, dir_name, *extra_path, **kwargs):