UHF-10772: Extend linkedevents app

src/js/react/apps/linkedevents/components/ResultCard.tsx

@@ -28,10 +28,7 @@ function ResultCard({ end_time, id, location, name, keywords=[], start_time, ima
   const { baseUrl, imagePlaceholder } = drupalSettings.helfi_events;
   const url = `${baseUrl}/${currentLanguage}/events/${id}`;
 
-  // Bail if no current language
-  if (!name[currentLanguage]) {
-    return null;
-  }
+  const resolvedName = name?.[currentLanguage] || name?.fi || Object.values(name)[0] || '';
 
   const getDate = () => {
     let startDate;
@@ -43,7 +40,7 @@ function ResultCard({ end_time, id, location, name, keywords=[], start_time, ima
       endDate = new Date(end_time);
       isMultiDate = end_time ? overDayApart(startDate, endDate) : false;
     } catch (e) {
-      throw new Error('DATE ERROR');
+      throw new Error(`DATE ERROR ${e}`);
     }
 
     if (isMultiDate) {
@@ -100,16 +97,29 @@ function ResultCard({ end_time, id, location, name, keywords=[], start_time, ima
     return <img alt='' {...imageProps} />;
   };
 
-  const image = images?.find(img => img.url);
+  const getImage = () => {
+    const image = images?.find(img => img.url);
+
+    if (image) {
+      return imageToElement(image);
+    }
+    if (imagePlaceholder) {
+      return parse(imagePlaceholder);
+    }
+
+    return (
+      <div className='image-placeholder'></div>
+    );
+  };
+
   const isRemote = location && location.id === INTERNET_EXCEPTION;
-  const title = name[currentLanguage] || '';
   const cardTags = getCardTags({keywords, currentLanguage});
 
   return (
     <CardItem
       cardUrl={url}
-      cardTitle={title}
-      cardImage={image ? imageToElement(image) : parse(imagePlaceholder) }
+      cardTitle={resolvedName}
+      cardImage={getImage()}
       cardTags={cardTags}
       cardUrlExternal
       location={isRemote ? 'Internet' : getLocation()}

src/js/react/apps/linkedevents/components/SeeAllButton.tsx

@@ -4,14 +4,15 @@ import ExternalLink from '../../../common/ExternalLink';
 
 function SeeAllButton() {
   const eventsUrl = useAtomValue(eventsPublicUrl) || '';
+  const { seeAllButtonOverride } = drupalSettings?.helfi_events || null;
 
   return (
     <div className="event-list__see-all-button">
       <ExternalLink
         data-hds-component="button"
         data-hds-variant="secondary"
         href={eventsUrl}
-        title={Drupal.t('Refine search in tapahtumat.hel.fi', {}, { context: 'Events search' })} />
+        title={seeAllButtonOverride || Drupal.t('Refine search in tapahtumat.hel.fi', {}, { context: 'Events search' })} />
     </div>
   );
 }

src/js/react/apps/linkedevents/containers/ResultsContainer.tsx

@@ -1,16 +1,17 @@
-import { createRef } from 'react';
+import { createRef, useEffect, useState } from 'react';
 import { useAtomValue } from 'jotai';
 
 import ResultsError from '@/react/common/ResultsError';
-import LoadingOverlay from '@/react/common/LoadingOverlay';
 import useScrollToResults from '@/react/common/hooks/useScrollToResults';
 import Pagination from '../components/Pagination';
 import ResultCard from '../components/ResultCard';
+import CardGhost from '@/react/common/CardGhost';
 import SeeAllButton from '../components/SeeAllButton';
 import { settingsAtom, urlAtom } from '../store';
 import type Event from '../types/Event';
 import ResultsHeader from '@/react/common/ResultsHeader';
 import ResultsEmpty from '@/react/common/ResultsEmpty';
+import LoadingOverlay from '@/react/common/LoadingOverlay';
 
 type ResultsContainerProps = {
   countNumber: number;
@@ -20,20 +21,20 @@ type ResultsContainerProps = {
 };
 
 function ResultsContainer({ countNumber, events, loading, error }: ResultsContainerProps) {
+  const { useExperimentalGhosts } = drupalSettings.helfi_events;
   const settings = useAtomValue(settingsAtom);
   const scrollTarget = createRef<HTMLDivElement>();
   const url = useAtomValue(urlAtom);
   // Checks when user makes the first search and api url is set.
   const choices = Boolean(url);
-  useScrollToResults(scrollTarget, choices);
+  const [initialized, setInitialized] = useState(false);
+  useScrollToResults(scrollTarget, initialized && choices && !loading);
 
-  if (loading) {
-    return (
-      <div className='hdbt__loading-wrapper'>
-        <LoadingOverlay />
-      </div>
-    );
-  }
+  useEffect(() => {
+    if (!initialized && !loading) {
+      setInitialized(true);
+    }
+  }, [initialized, setInitialized, loading]);
 
   if (error) {
     return (
@@ -44,29 +45,46 @@ function ResultsContainer({ countNumber, events, loading, error }: ResultsContai
     );
   }
 
+  if (loading && !useExperimentalGhosts) {
+    return (
+      <div className='hdbt__loading-wrapper'>
+        <LoadingOverlay />
+      </div>
+    );
+  }
+
   const size = settings.eventCount;
   const pages = Math.floor(countNumber / size);
   const addLastPage = countNumber > size && countNumber % size;
   const count = countNumber.toString();
 
-  return (
-    <div className='react-search__list-container'>
-      {events?.length > 0 ?
+  const getContent = () => {
+    if (loading && !events.length) {
+      return Array.from({ length: size }, (_, i) => <CardGhost key={i} />);
+    }
+    if (events.length > 0) {
+      return (
         <>
           <ResultsHeader
             resultText={
               <>
-                { Drupal.formatPlural(count, '1 event', '@count events',{},{context: 'Events search: result count'}) }
+                {Drupal.formatPlural(count, '1 event', '@count events', {}, {context: 'Events search: result count'})}
               </>
             }
             ref={scrollTarget}
           />
-          {events.map(event => <ResultCard key={event.id} {...event} />)}
+          {events.map(event => loading ? <CardGhost key={event.id} /> : <ResultCard key={event.id} {...event} />)}
           <Pagination pages={5} totalPages={addLastPage ? pages + 1 : pages} />
         </>
-        :
-        <ResultsEmpty wrapperClass='event-list__no-results' ref={scrollTarget} />
-      }
+      );
+    }
+
+    return <ResultsEmpty wrapperClass='event-list__no-results' ref={scrollTarget} />;
+  };
+
+  return (
+    <div className={`react-search__list-container${loading ? ' loading' : ''}`}>
+      {getContent()}
       <SeeAllButton />
     </div>
   );

src/js/react/apps/linkedevents/containers/SearchContainer.tsx

@@ -1,6 +1,7 @@
 import useSWR from 'swr';
 import { useAtomValue, useAtom } from 'jotai';
 
+import { useEffect, useState } from 'react';
 import ResultsContainer from './ResultsContainer';
 import FormContainer from './FormContainer';
 import type Event from '../types/Event';
@@ -26,6 +27,7 @@ const SWR_REFRESH_OPTIONS = {
 };
 
 const SearchContainer = () => {
+  const { useExperimentalGhosts } = drupalSettings.helfi_events;
   const initialUrl = useAtomValue(initialUrlAtom);
   const initialParams = useAtomValue(initialParamsAtom);
   const [params, setParams] = useAtom(paramsAtom);
@@ -59,13 +61,12 @@ const SearchContainer = () => {
 
     throw new Error('Failed to get data from the API');
   };
-  const { data, error } = useSWR(url, getEvents, SWR_REFRESH_OPTIONS);
-  const loading = !error && !data;
+  const { data, error, isLoading } = useSWR(url, getEvents, {...SWR_REFRESH_OPTIONS, keepPreviousData: useExperimentalGhosts});
 
   return (
     <>
       <FormContainer />
-      <ResultsContainer error={error} countNumber={data?.meta.count || 0} loading={loading} events={data?.data || []} />
+      <ResultsContainer error={error} countNumber={data?.meta.count || 0} loading={isLoading} events={data?.data || []} />
     </>
   );
 };

src/js/react/apps/linkedevents/store.tsx

@@ -8,7 +8,6 @@ import OptionType from './types/OptionType';
 import FormErrors from './types/FormErrors';
 import ApiKeys from './enum/ApiKeys';
 import Topic from './types/Topic';
-import type Event from './types/Event';
 
 interface Options {
   [key: string]: string
@@ -50,18 +49,18 @@ const createBaseAtom = () => {
   const useFixtures = settings?.use_fixtures;
   const eventsApiUrl = settings?.events_api_url;
   const eventListTitle = settings?.field_event_list_title;
-  const eventsPublicUrl = settings?.events_public_url;
+  const eventsPublicUrl = settings?.events_public_url || 'https://tapahtumat.hel.fi';
 
   const filterSettings: FilterSettings = {
     showLocation: settings?.field_event_location,
     showTimeFilter: settings?.field_event_time,
     showFreeFilter: settings?.field_free_events,
     showRemoteFilter: settings?.field_remote_events,
-    showTopicsFilter: settings?.field_filter_keywords.length > 0,
+    showTopicsFilter: settings?.field_filter_keywords?.length > 0,
     eventCount: Number(settings?.field_event_count)
   };
   const locations = transformLocations(settings?.places);
-  const topics: Topic[] = settings?.field_filter_keywords.map(topic => ({
+  const topics: Topic[] = settings?.field_filter_keywords?.map(topic => ({
     value: topic.id,
     label: topic.name.charAt(0).toUpperCase() + topic.name.slice(1),
   }));

src/js/react/common/Card.tsx

@@ -75,7 +75,11 @@ function CardItem({
   languageEducation,
   registrationRequired,
 }: CardItemProps): JSX.Element {
-  const cardClass = `card${cardModifierClass ? ` ${cardModifierClass}` : ''}${cardUrlExternal ? ' card--external' : ''}`;
+  const cardClass = `
+    card
+    ${cardModifierClass ? ` ${cardModifierClass}` : ''}
+    ${cardUrlExternal ? ' card--external' : ''}
+  `;
   const HeadingTag = cardTitleLevel ? `h${cardTitleLevel}` as keyof JSX.IntrinsicElements : 'h3';
 
   return (

src/js/react/common/CardGhost.tsx

@@ -0,0 +1,9 @@
+export default function CardGhost() {
+  return (
+    <div className='card card--ghost'>
+      <div className='card__image'>
+        <div className="image-placeholder"></div>
+      </div>
+    </div>
+  );
+}

src/js/react/common/hooks/useScrollToResults.ts

@@ -6,7 +6,7 @@ const useScrollToResults = (ref: RefObject<HTMLElement>, shouldScrollOnRender: b
 
     if (current && shouldScrollOnRender) {
       current.setAttribute('tabindex', '-1');
-      current.focus();
+      current.focus({preventScroll: true});
       current.scrollIntoView({behavior: 'smooth', block: 'center'});
     }
   }, [ref, shouldScrollOnRender]);

src/js/types/drupalSettings.d.ts

@@ -29,7 +29,9 @@ declare namespace drupalSettings {
         },
         use_fixtures: boolean
       }
-    }
+    },
+    seeAllButtonOverride: string,
+    useExperimentalGhosts: boolean,
   };
   const helfi_react_search: {
     // @todo UHF-10862 Remove cookie_privacy_url once the HDBT cookie banner module is in use.

src/scss/05_objects/_card.scss

@@ -26,6 +26,10 @@ $item-gap: $spacing-half;
   }
 }
 
+.card--ghost {
+  background: $color-black-20;
+}
+
 .card__image {
   flex-basis: 30%;
   flex-shrink: 0;

src/scss/06_components/paragraphs/_event-list.scss

@@ -12,6 +12,15 @@ $tag-vertical-padding: 5px;
   @include component-side-padding;
 }
 
+.component--react-search.component--coordinates-based-event-list {
+  background-color: $color-white;
+}
+
+// Use experimental card border styles for this paragraph.
+.component--coordinates-based-event-list .card:not(.card--ghost) {
+  border: 2px solid $color-black-20;
+}
+
 .events-list__empty-subtext {
   margin-bottom: $spacing-and-half;
 }

src/scss/06_components/paragraphs/_react-search.scss

@@ -17,6 +17,36 @@
   margin-bottom: $spacing-double;
 }
 
+.react-search__list-container.loading .card {
+  overflow: hidden;
+  position: relative;
+}
+
+@keyframes loading {
+  0% {
+    transform: skewX(-10deg) translateX(-150%);
+  }
+
+  100% {
+    transform: skewX(-10deg) translateX(250%);
+  }
+}
+
+.react-search__list-container.loading .card::after {
+  animation: loading 1.2s infinite;
+  background: linear-gradient(
+    90deg,
+    transparent,
+    $color-white,
+    transparent,
+  );
+  bottom: 0;
+  content: "";
+  position: absolute;
+  top: 0;
+  width: 50%;
+};
+
 .react-search__results-stats {
   margin-bottom: $spacing;
 }