Optimize API calls and Redesign More Filter section of Explore projects

frontend/src/api/projects.js

@@ -7,7 +7,7 @@ import { remapParamsToAPI } from '../utils/remapParamsToAPI';
 import api from './apiClient';
 import { UNDERPASS_URL } from '../config';
 
-export const useProjectsQuery = (fullProjectsQuery, action) => {
+export const useProjectsQuery = (fullProjectsQuery, action, queryOptions) => {
   const token = useSelector((state) => state.auth.token);
   const locale = useSelector((state) => state.preferences['locale']);
 
@@ -35,6 +35,7 @@ export const useProjectsQuery = (fullProjectsQuery, action) => {
     queryKey: ['projects', fullProjectsQuery, action],
     queryFn: ({ signal, queryKey }) => fetchProjects(signal, queryKey),
     keepPreviousData: true,
+    ...queryOptions,
   });
 };
 

frontend/src/components/header/index.js

@@ -89,7 +89,7 @@ export const Header = () => {
     ) : null;
 
   return (
-    <header className="w-100 bb b--grey-light">
+    <header id="top-header" className="w-100 bb b--grey-light">
       <UpdateDialog />
       {checkUserEmail()}
       {showOrgBar && (

frontend/src/components/projects/moreFiltersForm.js

@@ -115,7 +115,7 @@ export const MoreFiltersForm = (props) => {
           />
         </fieldset>
       )}
-      <div className="tr w-100 mt3">
+      <div className="tr w-100 mt3 pb3 ph2">
         <Link to="/explore">
           <Button className="bg-white blue-dark mr1 f6 pv2">
             <FormattedMessage {...messages.clear} />

frontend/src/components/projects/projectNav.js

@@ -115,7 +115,7 @@ export const ProjectNav = (props) => {
   // onSelectedItemChange={(changes) => console.log(changes)}
   return (
     /* mb1 mb2-ns (removed for map, but now small gap for more-filters) */
-    <header className="bt bb b--tan w-100 ">
+    <header id="explore-nav" className="bt bb b--tan w-100 ">
       <div className="mt2 mb1 ph3 dib lh-copy w-100 cf">
         <div className="w-80-l w-90-m w-100 fl dib">
           <div className="dib">
@@ -125,6 +125,7 @@ export const ProjectNav = (props) => {
             <ProjectsActionFilter setQuery={setQuery} fullProjectsQuery={fullProjectsQuery} />
             <Link
               to={filterRouteToggled}
+              id="more-filter-id"
               className={`dn mr3 dib-l lh-title f6 ${linkCombo} ${moreFiltersCurrentActiveStyle} blue-dark`}
             >
               <FormattedMessage {...messages.moreFilters} />

frontend/src/views/project.js

@@ -1,4 +1,4 @@
-import { Suspense, lazy, useEffect } from 'react';
+import React, { Suspense, lazy, useEffect, useState, useLayoutEffect, useRef } from 'react';
 import { useSelector } from 'react-redux';
 import ReactPlaceholder from 'react-placeholder';
 import { Outlet, useLocation, useNavigate, useParams } from 'react-router-dom';
@@ -16,6 +16,17 @@ import { useSetTitleTag } from '../hooks/UseMetaTags';
 import { NotFound } from './notFound';
 import { ProjectDetailPlaceholder } from '../components/projectDetail/projectDetailPlaceholder';
 import { useProjectsQuery, useProjectQuery } from '../api/projects';
+import { useWindowSize } from '../hooks/UseWindowSize';
+import { useOnClickOutside } from '../hooks/UseOnClickOutside';
+
+const smallScreenSize = 960;
+
+// returns true if the element or one of its parents has the classname
+function hasSomeParentClass(element, classname) {
+  if (typeof element.className === 'string' && element.className.split(' ').indexOf(classname) >= 0)
+    return true;
+  return element.parentNode && hasSomeParentClass(element.parentNode, classname);
+}
 
 const ProjectCreate = lazy(() => import('../components/projectCreate/index'));
 
@@ -29,15 +40,24 @@ export const CreateProject = () => {
 
 export const ProjectsPage = () => {
   useSetTitleTag('Explore projects');
+  const { pathname } = useLocation();
   const action = useSelector((state) => state.preferences['action']);
   const [fullProjectsQuery, setProjectQuery] = useExploreProjectsQueryParams();
   const isMapShown = useSelector((state) => state.preferences['mapShown']);
   const searchResultWidth = isMapShown ? 'two-column' : 'one-column';
 
-  const { data: projects, status, refetch } = useProjectsQuery(fullProjectsQuery, action);
+  const {
+    data: projects,
+    status,
+    refetch,
+  } = useProjectsQuery(fullProjectsQuery, action, {
+    // prevent api call until the filters are applied
+    enabled: !pathname.includes('/explore/filters/'),
+    cacheTime: 0,
+  });
 
   return (
-    <div className="pull-center">
+    <div className="pull-center" id="projects-container">
       <ProjectNav>
         <Outlet />
       </ProjectNav>
@@ -139,22 +159,109 @@ export const ProjectsPageIndex = (props) => {
 };
 
 export const MoreFilters = () => {
+  const [position, setPosition] = useState({ top: 0, left: 0, height: 0, width: 0 });
+  const [projectContainerHeight, setProjectContainerHeight] = useState({ height: 0 });
+  const [scrollHeight, setScrollHeight] = useState(0);
   const navigate = useNavigate();
   const [fullProjectsQuery] = useExploreProjectsQueryParams();
+  const [componentHeight, setComponentHeight] = useState(`${window.innerHeight}px`);
+  const filterElement = document?.getElementById('more-filter-id');
+  const projectContainerElement = document?.getElementById('projects-container');
+  const [width] = useWindowSize();
+
+  // calculate position of more filter button for layout
+  useLayoutEffect(() => {
+    if (!filterElement || !projectContainerElement) return;
+
+    const { top, left, height, width } = filterElement.getBoundingClientRect();
+    const { height: containerHeight } = projectContainerElement.getBoundingClientRect();
+    const navbarHeight = document.getElementById('explore-nav').offsetHeight;
+    // calculate difference between explore project page and navbar to set popover overlay height
+    setProjectContainerHeight(containerHeight - navbarHeight);
+    setPosition({ top, left, height, width });
+    setScrollHeight(window.scrollY);
+  }, [filterElement, width, projectContainerElement]);
+
+  useEffect(() => {
+    const contentHeight =
+      document.getElementById('explore-nav').offsetHeight +
+      document.getElementById('top-header').offsetHeight;
+
+    const handleResize = () => {
+      setComponentHeight(window.innerHeight - contentHeight);
+    };
+
+    handleResize();
+
+    window.addEventListener('resize', handleResize);
+
+    return () => {
+      window.removeEventListener('resize', handleResize);
+    };
+  }, []);
 
   const currentUrl = `/explore${
     stringify(fullProjectsQuery) ? ['?', stringify(fullProjectsQuery)].join('') : ''
   }`;
+  const moreFilterRef = useRef(null);
+
+  useOnClickOutside(moreFilterRef, (e) => {
+    const clickedElement = e.target;
+    const isClearSelectButton = hasSomeParentClass(clickedElement, 'react-select__clear-indicator');
+    if (
+      e.target.id === 'more-filter-id' ||
+      isClearSelectButton //prevent popup close on clicking clear button of select component
+    )
+      return;
+    navigate(currentUrl);
+  });
+
+  const isSmallScreen = width < smallScreenSize;
 
   return (
     <>
-      <div className="absolute left-0 z-4 mt1 w-40-l w-100 h-100 bg-white h4 ph1 ph5-l">
-        <MoreFiltersForm currentUrl={currentUrl} />
+      <div
+        ref={moreFilterRef}
+        className={`absolute z-4 bg-white ${
+          // compare screen size for two different design in small screen and large screen of filter section
+          isSmallScreen ? ' left-0  mt1 w-40-l w-100  h4 ph1 ph5-l' : 'pa2 ba b--light-gray'
+        }`}
+        style={
+          isSmallScreen
+            ? { height: `${componentHeight}px` }
+            : {
+                // 250 is half the width of filter component to place filter exactly center of more-filter button
+                left: position.left - 250 + position.width / 2,
+                top: position.top + position.height + 10 + scrollHeight,
+                width: '31.25em',
+                boxShadow: '2px 1px 23px -1px rgba(143,130,130,0.75)',
+              }
+        }
+      >
+        <div
+          className={`${
+            isSmallScreen ? 'scrollable-container h-100  overflow-x-hidden overflow-y-auto' : ''
+          }`}
+        >
+          <MoreFiltersForm currentUrl={currentUrl} />
+        </div>
       </div>
+      {!isSmallScreen && (
+        <div
+          style={{
+            left: `${position.left + position.width / 2}px`,
+            top: position.top + position.height + 2 + scrollHeight,
+          }}
+          className={`absolute w1 h1 bg-white bl bt b--grey-light rotate-45 z-5`}
+        />
+      )}
+
       <div
-        onClick={() => navigate(currentUrl)}
         role="button"
-        className="absolute right-0 z-4 br w-60-l w-0 h-100 bg-blue-dark o-70 h6"
+        className="absolute right-0 z-2 br w-100-l w-0 bg-blue-dark o-70"
+        style={{
+          height: `${projectContainerHeight}px`,
+        }}
       />
     </>
   );

frontend/src/views/tests/project.test.js

@@ -122,6 +122,16 @@ describe('UserProjectsPage Component', () => {
 });
 
 test('More Filters should close the more filters container when clicked outside the container', async () => {
+  jest.spyOn(document, 'getElementById').mockReturnValue({
+    offsetHeight: 100,
+    getBoundingClientRect: () => ({
+      top: 0,
+      left: 0,
+      height: 100,
+      width: 100,
+    }),
+  });
+
   const { user, router } = createComponentWithMemoryRouter(
     <QueryParamProvider adapter={ReactRouter6Adapter}>
       <ReduxIntlProviders>