1 files changed, 129 insertions, 0 deletions
diff --git a/webui/src/pages/list/FilterToolbar.tsx b/webui/src/pages/list/FilterToolbar.tsx
new file mode 100644
index 00000000..825a9dee
--- /dev/null
+++ b/webui/src/pages/list/FilterToolbar.tsx
@@ -0,0 +1,129 @@
+import { pipe } from '@arrows/composition';
+import { LocationDescriptor } from 'history';
+import React from 'react';
+
+import Toolbar from '@material-ui/core/Toolbar';
+import { makeStyles } from '@material-ui/core/styles';
+import CheckCircleOutline from '@material-ui/icons/CheckCircleOutline';
+import ErrorOutline from '@material-ui/icons/ErrorOutline';
+
+import {
+  FilterDropdown,
+  FilterProps,
+  Filter,
+  parse,
+  stringify,
+  Query,
+} from './Filter';
+import { useBugCountQuery } from './FilterToolbar.generated';
+
+const useStyles = makeStyles(theme => ({
+  toolbar: {
+    backgroundColor: theme.palette.grey['100'],
+    borderColor: theme.palette.grey['300'],
+    borderWidth: '1px 0',
+    borderStyle: 'solid',
+    margin: theme.spacing(0, -1),
+  },
+  spacer: {
+    flex: 1,
+  },
+}));
+
+// This prepends the filter text with a count
+type CountingFilterProps = {
+  query: string;
+  children: React.ReactNode;
+} & FilterProps;
+function CountingFilter({ query, children, ...props }: CountingFilterProps) {
+  const { data, loading, error } = useBugCountQuery({
+    variables: { query },
+  });
+
+  var prefix;
+  if (loading) prefix = '...';
+  else if (error || !data?.repository) prefix = '???';
+  // TODO: better prefixes & error handling
+  else prefix = data.repository.bugs.totalCount;
+
+  return (
+    <Filter {...props}>
+      {prefix} {children}
+    </Filter>
+  );
+}
+
+type Props = {
+  query: string;
+  queryLocation: (query: string) => LocationDescriptor;
+};
+function FilterToolbar({ query, queryLocation }: Props) {
+  const classes = useStyles();
+  const params: Query = parse(query);
+
+  const hasKey = (key: string): boolean =>
+    params[key] && params[key].length > 0;
+  const hasValue = (key: string, value: string): boolean =>
+    hasKey(key) && params[key].includes(value);
+  const loc = pipe(stringify, queryLocation);
+  const replaceParam = (key: string, value: string) => (
+    params: Query
+  ): Query => ({
+    ...params,
+    [key]: [value],
+  });
+  const clearParam = (key: string) => (params: Query): Query => ({
+    ...params,
+    [key]: [],
+  });
+
+  // TODO: author/label filters
+  return (
+    <Toolbar className={classes.toolbar}>
+      <CountingFilter
+        active={hasValue('status', 'open')}
+        query={pipe(
+          replaceParam('status', 'open'),
+          clearParam('sort'),
+          stringify
+        )(params)}
+        to={pipe(replaceParam('status', 'open'), loc)(params)}
+        icon={ErrorOutline}
+      >
+        open
+      </CountingFilter>
+      <CountingFilter
+        active={hasValue('status', 'closed')}
+        query={pipe(
+          replaceParam('status', 'closed'),
+          clearParam('sort'),
+          stringify
+        )(params)}
+        to={pipe(replaceParam('status', 'closed'), loc)(params)}
+        icon={CheckCircleOutline}
+      >
+        closed
+      </CountingFilter>
+      <div className={classes.spacer} />
+      {/*
+      <Filter active={hasKey('author')}>Author</Filter>
+      <Filter active={hasKey('label')}>Label</Filter>
+      */}
+      <FilterDropdown
+        dropdown={[
+          ['id', 'ID'],
+          ['creation', 'Newest'],
+          ['creation-asc', 'Oldest'],
+          ['edit', 'Recently updated'],
+          ['edit-asc', 'Least recently updated'],
+        ]}
+        itemActive={key => hasValue('sort', key)}
+        to={key => pipe(replaceParam('sort', key), loc)(params)}
+      >
+        Sort
+      </FilterDropdown>
+    </Toolbar>
+  );
+}
+
+export default FilterToolbar;