Add build_tabulator_params

validata_core/source_helpers.py

+from tabulator import helpers
+
+
+def build_tabulator_params(type, name, source):
+    """Return tabulator params auto-detected from `name` and `source`, handling `type=file` for Validata UI and API.
+
+    Also decode `source`.
+    """
+    scheme, format = helpers.detect_scheme_and_format(name)
+
+    # In case of uploaded file (we work with bytes string)
+    if type == 'file':
+
+        # CSV: converts to string
+        if format == 'csv':
+            scheme = 'text'
+            encoding = helpers.detect_encoding(source)
+            source = source.decode(encoding)
+
+        # Else use custom BytesLoader
+        else:
+            scheme = 'bytes'
+
+    return {'source': source, 'format': format, 'scheme': scheme}