feat: add new filter button with state (#5556)

[Screencast from 2023-12-05
16-59-28.webm](https://github.com/Unleash/unleash/assets/964450/793c771b-6246-4e28-8c13-920696a48bd5)

---------

Co-authored-by: kwasniew <kwasniewski.mateusz@gmail.com>

frontend/src/component/common/FilterItem/FilterItem.test.tsx

@@ -17,6 +17,7 @@ const setup = (initialState: FilterItem) => {
         onChange: (value: FilterItem) => {
             recordedChanges.push(value);
         },
+        onChipClose: () => {},
         state: initialState,
     };
 

frontend/src/component/common/FilterItem/FilterItem.tsx

@@ -9,11 +9,16 @@ import {
     StyledTextField,
 } from './FilterItem.styles';
 import { FilterItemChip } from './FilterItemChip/FilterItemChip';
+import {
+    FeatureTogglesListFilters,
+    IFilterItem,
+} from '../../feature/FeatureToggleList/FeatureToggleFilters/FeatureToggleFilters';
 
 interface IFilterItemProps {
     label: string;
     options: Array<{ label: string; value: string }>;
     onChange: (value: FilterItem) => void;
+    onChipClose: () => void;
     state: FilterItem | null | undefined;
 }
 
@@ -29,6 +34,7 @@ export const FilterItem: FC<IFilterItemProps> = ({
     label,
     options,
     onChange,
+    onChipClose,
     state,
 }) => {
     const ref = useRef<HTMLDivElement>(null);
@@ -52,6 +58,7 @@ export const FilterItem: FC<IFilterItemProps> = ({
     const onDelete = () => {
         onChange({ operator: 'IS', values: [] });
         onClose();
+        onChipClose();
     };
 
     const handleToggle = (value: string) => () => {
@@ -84,7 +91,6 @@ export const FilterItem: FC<IFilterItemProps> = ({
             });
         }
     }, [state]);
-
     return (
         <>
             <Box ref={ref}>

frontend/src/component/common/FilterItem/FilterItemChip/FilterItemChip.tsx

@@ -105,7 +105,7 @@ export const FilterItemChip: FC<IFilterItemChipProps> = ({
                         )}
                     />
                     <ConditionallyRender
-                        condition={Boolean(onDelete && hasSelectedOptions)}
+                        condition={Boolean(onDelete)}
                         show={() => (
                             <StyledIconButton
                                 aria-label='delete'

frontend/src/component/feature/FeatureToggleList/FeatureToggleFilters/AddFilterButton.tsx

@@ -0,0 +1,72 @@
+import React, { useState } from 'react';
+import Button from '@mui/material/Button';
+import Menu from '@mui/material/Menu';
+import MenuItem from '@mui/material/MenuItem';
+import { IFilterItem } from './FeatureToggleFilters';
+import { Box, styled } from '@mui/material';
+import { Add } from '@mui/icons-material';
+
+const StyledButton = styled(Button)(({ theme }) => ({
+    margin: theme.spacing(-1, 0, -1, 0),
+    padding: theme.spacing(1.25),
+}));
+interface IAddFilterButtonProps {
+    availableFilters: IFilterItem[];
+    setAvailableFilters: (filters: IFilterItem[]) => void;
+}
+
+const AddFilterButton = ({
+    availableFilters,
+    setAvailableFilters,
+}: IAddFilterButtonProps) => {
+    const [anchorEl, setAnchorEl] = useState<null | HTMLElement>(null);
+
+    const handleClick = (event: React.MouseEvent<HTMLButtonElement>) => {
+        setAnchorEl(event.currentTarget);
+    };
+    const handleClose = () => {
+        setAnchorEl(null);
+    };
+
+    const onClick = (label: string) => {
+        const filters = availableFilters.map((filter) =>
+            filter.label === label
+                ? {
+                      ...filter,
+                      enabled: true,
+                  }
+                : filter,
+        );
+        setAvailableFilters(filters);
+        handleClose();
+    };
+
+    return (
+        <div>
+            <StyledButton onClick={handleClick} startIcon={<Add />}>
+                Add Filter
+            </StyledButton>
+            <Menu
+                id='simple-menu'
+                anchorEl={anchorEl}
+                keepMounted
+                open={Boolean(anchorEl)}
+                onClose={handleClose}
+            >
+                {availableFilters.map(
+                    (filter) =>
+                        !filter.enabled && (
+                            <MenuItem
+                                key={filter.label}
+                                onClick={() => onClick(filter.label)}
+                            >
+                                {filter.label}
+                            </MenuItem>
+                        ),
+                )}
+            </Menu>
+        </div>
+    );
+};
+
+export default AddFilterButton;

frontend/src/component/feature/FeatureToggleList/FeatureToggleFilters/FeatureToggleFilters.tsx

@@ -1,11 +1,19 @@
-import { VFC } from 'react';
-import { Box } from '@mui/material';
+import { useEffect, useState, VFC } from 'react';
+import { Box, styled } from '@mui/material';
 import { FilterItem } from 'component/common/FilterItem/FilterItem';
 import useProjects from 'hooks/api/getters/useProjects/useProjects';
 import { ConditionallyRender } from 'component/common/ConditionallyRender/ConditionallyRender';
+import AddFilterButton from './AddFilterButton';
+
+const StyledBox = styled(Box)(({ theme }) => ({
+    display: 'flex',
+    padding: theme.spacing(2, 3),
+    gap: theme.spacing(1),
+}));
 
 export type FeatureTogglesListFilters = {
-    project: FilterItem | null | undefined;
+    project?: FilterItem | null | undefined;
+    state?: FilterItem | null | undefined;
 };
 
 interface IFeatureToggleFiltersProps {
@@ -13,29 +21,96 @@ interface IFeatureToggleFiltersProps {
     onChange: (value: FeatureTogglesListFilters) => void;
 }
 
+export interface IFilterItem {
+    label: string;
+    options: {
+        label: string;
+        value: string;
+    }[];
+    filterKey: keyof FeatureTogglesListFilters;
+    enabled?: boolean;
+}
+
 export const FeatureToggleFilters: VFC<IFeatureToggleFiltersProps> = ({
     state,
     onChange,
 }) => {
     const { projects } = useProjects();
-    const projectsOptions = (projects || []).map((project) => ({
-        label: project.name,
-        value: project.id,
-    }));
 
+    const stateOptions = [
+        {
+            label: 'Active',
+            value: 'active',
+        },
+        {
+            label: 'Stale',
+            value: 'stale',
+        },
+    ];
+    const defaultFilterItems: IFilterItem[] = [
+        {
+            label: 'State',
+            options: stateOptions,
+            filterKey: 'state',
+        },
+    ];
+    const [availableFilters, setAvailableFilters] =
+        useState<IFilterItem[]>(defaultFilterItems);
+    const removeFilter = (label: string) => {
+        const filters = availableFilters.map((filter) =>
+            filter.label === label
+                ? {
+                      ...filter,
+                      enabled: false,
+                  }
+                : filter,
+        );
+        setAvailableFilters(filters);
+    };
+
+    useEffect(() => {
+        const projectsOptions = (projects || []).map((project) => ({
+            label: project.name,
+            value: project.id,
+        }));
+
+        const newFilterItems = [
+            ...defaultFilterItems,
+            {
+                label: 'Project',
+                options: projectsOptions,
+                filterKey: 'project',
+            } as const,
+        ];
+
+        setAvailableFilters(newFilterItems);
+    }, [JSON.stringify(projects)]);
     return (
-        <Box sx={(theme) => ({ padding: theme.spacing(2, 3) })}>
+        <StyledBox>
+            {availableFilters.map(
+                (filter) =>
+                    filter.enabled && (
+                        <FilterItem
+                            key={filter.label}
+                            label={filter.label}
+                            state={state[filter.filterKey]}
+                            options={filter.options}
+                            onChange={(value) =>
+                                onChange({ [filter.filterKey]: value })
+                            }
+                            onChipClose={() => removeFilter(filter.label)}
+                        />
+                    ),
+            )}
             <ConditionallyRender
-                condition={projectsOptions.length > 1}
-                show={() => (
-                    <FilterItem
-                        label='Project'
-                        state={state.project}
-                        options={projectsOptions}
-                        onChange={(value) => onChange({ project: value })}
+                condition={availableFilters.some((filter) => !filter.enabled)}
+                show={
+                    <AddFilterButton
+                        availableFilters={availableFilters}
+                        setAvailableFilters={setAvailableFilters}
                     />
-                )}
+                }
             />
-        </Box>
+        </StyledBox>
     );
 };

frontend/src/component/feature/FeatureToggleList/FeatureToggleListTable.tsx

@@ -81,6 +81,7 @@ export const FeatureToggleListTable: VFC = () => {
         sortBy: withDefault(StringParam, 'createdAt'),
         sortOrder: withDefault(StringParam, 'desc'),
         project: FilterItemParam,
+        state: FilterItemParam,
     };
     const [tableState, setTableState] = usePersistentTableState(
         'features-list-table',

frontend/src/utils/serializeQueryParams.ts

@@ -37,7 +37,7 @@ export type FilterItem = {
 const encodeFilterItem = (
     filterItem: FilterItem | null | undefined,
 ): string | undefined => {
-    return filterItem && filterItem.values.length
+    return filterItem?.values.length
         ? `${filterItem.operator}:${filterItem.values.join(',')}`
         : undefined;
 };