1 files changed, 44 insertions, 0 deletions
diff --git a/app/javascript/flavours/glitch/reducers/filters.js b/app/javascript/flavours/glitch/reducers/filters.js
new file mode 100644
index 000000000..e1f014046
--- /dev/null
+++ b/app/javascript/flavours/glitch/reducers/filters.js
@@ -0,0 +1,44 @@
+import { FILTERS_IMPORT } from '../actions/importer';
+import { FILTERS_FETCH_SUCCESS, FILTERS_CREATE_SUCCESS } from '../actions/filters';
+import { Map as ImmutableMap, is, fromJS } from 'immutable';
+
+const normalizeFilter = (state, filter) => {
+  const normalizedFilter = fromJS({
+    id: filter.id,
+    title: filter.title,
+    context: filter.context,
+    filter_action: filter.filter_action,
+    keywords: filter.keywords,
+    expires_at: filter.expires_at ? Date.parse(filter.expires_at) : null,
+  });
+
+  if (is(state.get(filter.id), normalizedFilter)) {
+    return state;
+  } else {
+    // Do not overwrite keywords when receiving a partial filter
+    return state.update(filter.id, ImmutableMap(), (old) => (
+      old.mergeWith(((old_value, new_value) => (new_value === undefined ? old_value : new_value)), normalizedFilter)
+    ));
+  }
+};
+
+const normalizeFilters = (state, filters) => {
+  filters.forEach(filter => {
+    state = normalizeFilter(state, filter);
+  });
+
+  return state;
+};
+
+export default function filters(state = ImmutableMap(), action) {
+  switch(action.type) {
+  case FILTERS_CREATE_SUCCESS:
+    return normalizeFilter(state, action.filter);
+  case FILTERS_FETCH_SUCCESS:
+    return normalizeFilters(ImmutableMap(), action.filters);
+  case FILTERS_IMPORT:
+    return normalizeFilters(state, action.filters);
+  default:
+    return state;
+  }
+}