Merge pull request #7 from oarepo/facet_filter_signal

Add before_facet_options signal for facet filtering

oarepo_ui/signals.py

@@ -0,0 +1,13 @@
+from blinker import Namespace
+
+_signals = Namespace()
+
+before_facet_options = _signals.signal('before-facet-options')
+"""Signal is sent before facet options are returned.
+
+   :param source: view instance
+   :param index: Facets index instance ({aggs: ..., filters: ...})
+   :param request: request instance
+   :param view_args: view args
+   :param view_kwargs: view kwargs
+"""

oarepo_ui/version.py

@@ -1 +1 @@
-__version__ = '2.0.3'
+__version__ = '2.1.0'

oarepo_ui/views.py

@@ -1,7 +1,8 @@
-from flask import Blueprint, jsonify
+from flask import Blueprint, jsonify, request
 from flask.views import MethodView
 
 from oarepo_ui.proxy import current_oarepo_ui
+from oarepo_ui.signals import before_facet_options
 
 
 class EndpointOptionsView(MethodView):
@@ -15,6 +16,9 @@ def options(self, *args, **kwargs):
         index_name = self.endpoint['config'].get('search_index')
         if index_name:
             index = current_oarepo_ui.facets[index_name]
+            index = {**index}
+            before_facet_options.send(self, index=index, request=request, view_args=args, view_kwargs=kwargs)
+
             ret['facets'] = current_oarepo_ui._translate_facets(index.get('aggs', {}), index_name=index_name,
                                                                 index=index)
             ret['filters'] = current_oarepo_ui._translate_filters(index.get('filters', {}), index_name=index_name,