Add search results pagination to web UI (#11409)

* Add search results pagination to web UI

Fix #10737

* Fix code style issue

5 files changed, 76 insertions, 8 deletions

diff --git a/app/javascript/mastodon/actions/search.js b/app/javascript/mastodon/actions/search.js
index 0974fdd15..a178faead 100644
--- a/app/javascript/mastodon/actions/search.js
+++ b/app/javascript/mastodon/actions/search.js
@@ -10,6 +10,10 @@ export const SEARCH_FETCH_REQUEST = 'SEARCH_FETCH_REQUEST';
 export const SEARCH_FETCH_SUCCESS = 'SEARCH_FETCH_SUCCESS';
 export const SEARCH_FETCH_FAIL    = 'SEARCH_FETCH_FAIL';
 
+export const SEARCH_EXPAND_REQUEST = 'SEARCH_EXPAND_REQUEST';
+export const SEARCH_EXPAND_SUCCESS = 'SEARCH_EXPAND_SUCCESS';
+export const SEARCH_EXPAND_FAIL    = 'SEARCH_EXPAND_FAIL';
+
 export function changeSearch(value) {
   return {
     type: SEARCH_CHANGE,
@@ -77,8 +81,50 @@ export function fetchSearchFail(error) {
   };
 };
 
-export function showSearch() {
-  return {
-    type: SEARCH_SHOW,
-  };
+export const expandSearch = type => (dispatch, getState) => {
+  const value  = getState().getIn(['search', 'value']);
+  const offset = getState().getIn(['search', 'results', type]).size;
+
+  dispatch(expandSearchRequest());
+
+  api(getState).get('/api/v2/search', {
+    params: {
+      q: value,
+      type,
+      offset,
+    },
+  }).then(({ data }) => {
+    if (data.accounts) {
+      dispatch(importFetchedAccounts(data.accounts));
+    }
+
+    if (data.statuses) {
+      dispatch(importFetchedStatuses(data.statuses));
+    }
+
+    dispatch(expandSearchSuccess(data, value, type));
+    dispatch(fetchRelationships(data.accounts.map(item => item.id)));
+  }).catch(error => {
+    dispatch(expandSearchFail(error));
+  });
 };
+
+export const expandSearchRequest = () => ({
+  type: SEARCH_EXPAND_REQUEST,
+});
+
+export const expandSearchSuccess = (results, searchTerm, searchType) => ({
+  type: SEARCH_EXPAND_SUCCESS,
+  results,
+  searchTerm,
+  searchType,
+});
+
+export const expandSearchFail = error => ({
+  type: SEARCH_EXPAND_FAIL,
+  error,
+});
+
+export const showSearch = () => ({
+  type: SEARCH_SHOW,
+});
diff --git a/app/javascript/mastodon/features/compose/components/search_results.js b/app/javascript/mastodon/features/compose/components/search_results.js
index 2f338dd24..4b4cdff74 100644
--- a/app/javascript/mastodon/features/compose/components/search_results.js
+++ b/app/javascript/mastodon/features/compose/components/search_results.js
@@ -8,6 +8,7 @@ import ImmutablePureComponent from 'react-immutable-pure-component';
 import Hashtag from '../../../components/hashtag';
 import Icon from 'mastodon/components/icon';
 import { searchEnabled } from '../../../initial_state';
+import LoadMore from 'mastodon/components/load_more';
 
 const messages = defineMessages({
   dismissSuggestion: { id: 'suggestions.dismiss', defaultMessage: 'Dismiss suggestion' },
@@ -20,15 +21,24 @@ class SearchResults extends ImmutablePureComponent {
     results: ImmutablePropTypes.map.isRequired,
     suggestions: ImmutablePropTypes.list.isRequired,
     fetchSuggestions: PropTypes.func.isRequired,
+    expandSearch: PropTypes.func.isRequired,
     dismissSuggestion: PropTypes.func.isRequired,
     searchTerm: PropTypes.string,
     intl: PropTypes.object.isRequired,
   };
 
   componentDidMount () {
-    this.props.fetchSuggestions();
+    if (this.props.searchTerm === '') {
+      this.props.fetchSuggestions();
+    }
   }
 
+  handleLoadMoreAccounts = () => this.props.expandSearch('accounts');
+
+  handleLoadMoreStatuses = () => this.props.expandSearch('statuses');
+
+  handleLoadMoreHashtags = () => this.props.expandSearch('hashtags');
+
   render () {
     const { intl, results, suggestions, dismissSuggestion, searchTerm } = this.props;
 
@@ -65,6 +75,8 @@ class SearchResults extends ImmutablePureComponent {
           <h5><Icon id='users' fixedWidth /><FormattedMessage id='search_results.accounts' defaultMessage='People' /></h5>
 
           {results.get('accounts').map(accountId => <AccountContainer key={accountId} id={accountId} />)}
+
+          {results.get('accounts').size >= 5 && <LoadMore visible onClick={this.handleLoadMoreAccounts} />}
         </div>
       );
     }
@@ -76,6 +88,8 @@ class SearchResults extends ImmutablePureComponent {
           <h5><Icon id='quote-right' fixedWidth /><FormattedMessage id='search_results.statuses' defaultMessage='Toots' /></h5>
 
           {results.get('statuses').map(statusId => <StatusContainer key={statusId} id={statusId} />)}
+
+          {results.get('statuses').size >= 5 && <LoadMore visible onClick={this.handleLoadMoreStatuses} />}
         </div>
       );
     } else if(results.get('statuses') && results.get('statuses').size === 0 && !searchEnabled && !(searchTerm.startsWith('@') || searchTerm.startsWith('#') || searchTerm.includes(' '))) {
@@ -97,6 +111,8 @@ class SearchResults extends ImmutablePureComponent {
           <h5><Icon id='hashtag' fixedWidth /><FormattedMessage id='search_results.hashtags' defaultMessage='Hashtags' /></h5>
 
           {results.get('hashtags').map(hashtag => <Hashtag key={hashtag.get('name')} hashtag={hashtag} />)}
+
+          {results.get('hashtags').size >= 5 && <LoadMore visible onClick={this.handleLoadMoreHashtags} />}
         </div>
       );
     }
diff --git a/app/javascript/mastodon/features/compose/containers/search_results_container.js b/app/javascript/mastodon/features/compose/containers/search_results_container.js
index e4d5f3420..1f714ff83 100644
--- a/app/javascript/mastodon/features/compose/containers/search_results_container.js
+++ b/app/javascript/mastodon/features/compose/containers/search_results_container.js
@@ -1,6 +1,7 @@
 import { connect } from 'react-redux';
 import SearchResults from '../components/search_results';
-import { fetchSuggestions, dismissSuggestion } from '../../../actions/suggestions';
+import { fetchSuggestions, dismissSuggestion } from 'mastodon/actions/suggestions';
+import { expandSearch } from 'mastodon/actions/search';
 
 const mapStateToProps = state => ({
   results: state.getIn(['search', 'results']),
@@ -10,6 +11,7 @@ const mapStateToProps = state => ({
 
 const mapDispatchToProps = dispatch => ({
   fetchSuggestions: () => dispatch(fetchSuggestions()),
+  expandSearch: type => dispatch(expandSearch(type)),
   dismissSuggestion: account => dispatch(dismissSuggestion(account.get('id'))),
 });
 
diff --git a/app/javascript/mastodon/reducers/search.js b/app/javascript/mastodon/reducers/search.js
index 77b7f588c..f437ff217 100644
--- a/app/javascript/mastodon/reducers/search.js
+++ b/app/javascript/mastodon/reducers/search.js
@@ -3,6 +3,7 @@ import {
   SEARCH_CLEAR,
   SEARCH_FETCH_SUCCESS,
   SEARCH_SHOW,
+  SEARCH_EXPAND_SUCCESS,
 } from '../actions/search';
 import {
   COMPOSE_MENTION,
@@ -42,6 +43,8 @@ export default function search(state = initialState, action) {
       statuses: ImmutableList(action.results.statuses.map(item => item.id)),
       hashtags: fromJS(action.results.hashtags),
     })).set('submitted', true).set('searchTerm', action.searchTerm);
+  case SEARCH_EXPAND_SUCCESS:
+    return state.updateIn(['results', action.searchType], list => list.concat(action.results[action.searchType].map(item => item.id)));
   default:
     return state;
   }
diff --git a/app/javascript/styles/mastodon/components.scss b/app/javascript/styles/mastodon/components.scss
index 54442e007..8ed27371e 100644
--- a/app/javascript/styles/mastodon/components.scss
+++ b/app/javascript/styles/mastodon/components.scss
@@ -4006,8 +4006,9 @@ a.status-card.compact:hover {
 }
 
 .search-results__info {
-  padding: 10px;
-  color: $secondary-text-color;
+  padding: 20px;
+  color: $darker-text-color;
+  text-align: center;
 }
 
 .modal-root {