annotations CLI and file UX rework (#1049)

* rename config param label-file

* annotations rework - CLI params, file naming and backups

* lint

* improve cli option error checks

* enable session cookies

* enable session cookies

* add session id

* name annotations file in multi-dataset and multi-user safe manner

* pass data user hash to front-end

* add annotation collection name support to front-end

* add constant for annotation data collection name

* parameterize annotation collection name; make it sticky in the session

* clarify comments

* hard wire a temporary data collection name for testing

* prettier

* test comment

* package command

* set annotations  filename dialog

* name  and hash are visible

* wire up data collection capture

server/app/util/constants.py

@@ -33,3 +33,6 @@ JSON_NaN_to_num_warning_msg = (
 REACTIVE_LIMIT = 1_000_000
 
 MAX_LAYOUTS = 30
+
+CXGUID = "cxguid"
+CXG_ANNO_COLLECTION = "cxg_anno_collection"

server/app/util/data_locator.py

@@ -57,6 +57,16 @@ class DataLocator():
         else:
             return getattr(info, 'LastModified', None)
 
+    def abspath(self):
+        """
+        return the absolute path for the locator - only really does something
+        for file: protocol, as all others are already absolute
+        """
+        if self.islocal():
+            return os.path.abspath(self.path)
+        else:
+            return self.uri_or_path
+
     def isfile(self):
         return self.fs.isfile(self.cname)