add db store callback

src/fobi/contrib/plugins/form_handlers/db_store/callbacks.py

@@ -0,0 +1,65 @@
+import datetime
+
+import simplejson as json
+
+from fobi.base import (
+    FormCallback,
+    get_processed_form_data,
+)
+from fobi.constants import CALLBACK_FORM_VALID
+from .models import SavedFormDataEntry
+
+__title__ = 'fobi.contrib.plugins.form_handlers.db_store.callbacks'
+__author__ = 'Artur Barseghyan <artur.barseghyan@gmail.com>'
+__copyright__ = '2014-2017 Artur Barseghyan'
+__license__ = 'GPL 2.0/LGPL 2.1'
+__all__ = (
+    'AutoFormDbStore',
+)
+
+
+class AutoFormDbStore(FormCallback):
+    """Auto save form entries.
+
+    Note, that this callback is not active. In order to activate it, you
+    should import the ``AutoFormDbStore`` and register it using the
+    callback register as follows.
+
+    >>> from fobi.base import form_callback_registry
+    >>> from fobi.contrib.plugins.form_handlers.db_store.callbacks import (
+    >>>     AutoFormDbStore
+    >>> )
+    >>> form_callback_registry.register(AutoFormDbStore)
+    """
+
+    stage = CALLBACK_FORM_VALID
+
+    def callback(self, form_entry, request, form):
+        """Callback.
+
+        :param form_entry:
+        :param request:
+        :param form:
+        :return:
+        """
+        form_element_entries = form_entry.formelemententry_set.all()
+
+        # Clean up the values, leave our content fields and empty values.
+        field_name_to_label_map, cleaned_data = get_processed_form_data(
+            form,
+            form_element_entries
+        )
+
+        for key, value in cleaned_data.items():
+            if isinstance(value, (datetime.datetime, datetime.date)):
+                cleaned_data[key] = value.isoformat() \
+                    if hasattr(value, 'isoformat') \
+                    else value
+
+        saved_form_data_entry = SavedFormDataEntry(
+            form_entry=form_entry,
+            user=request.user if request.user and request.user.pk else None,
+            form_data_headers=json.dumps(field_name_to_label_map),
+            saved_data=json.dumps(cleaned_data)
+        )
+        saved_form_data_entry.save()