[IMPROVE] Add pagination to search messages (#3212)

* [FIX] Pagination in SearchMessage through the javascript

* Minor tweak

* Remove unnecessary state update

* Fix inconsistent value update

* Minor change

* Fixed searchMessages to work with new value of count

* minor tweak

* minor tweak

* minor tweak

* Fix encrypted search

* Added Offset to lib/rocketchat and fixed the search

* fixed the debounce in  search message view

* Needed to compare server version to lower than 3.17.0

Co-authored-by: Gerzon Z <gerzonc@icloud.com>
Co-authored-by: Gerzon Z <gerzonzcanario@gmail.com>
Co-authored-by: Diego Mello <diegolmello@gmail.com>
Co-authored-by: Levy Costa <levycosta471@gmail.com>
Co-authored-by: AlexAlexandre <alexalexandrejr@gmail.com>

app/lib/rocketchat.js

@@ -1537,11 +1537,13 @@ const RocketChat = {
 			messageId
 		});
 	},
-	searchMessages(roomId, searchText) {
+	searchMessages(roomId, searchText, count, offset) {
 		// RC 0.60.0
 		return this.sdk.get('chat.search', {
 			roomId,
-			searchText
+			searchText,
+			count,
+			offset
 		});
 	},
 	toggleFollowMessage(mid, follow) {

app/views/RoomView/RightButtons.js

@@ -20,7 +20,8 @@ class RightButtonsContainer extends Component {
 		navigation: PropTypes.object,
 		isMasterDetail: PropTypes.bool,
 		toggleFollowThread: PropTypes.func,
-		joined: PropTypes.bool
+		joined: PropTypes.bool,
+		encrypted: PropTypes.bool
 	};
 
 	constructor(props) {
@@ -137,11 +138,14 @@ class RightButtonsContainer extends Component {
 
 	goSearchView = () => {
 		logEvent(events.ROOM_GO_SEARCH);
-		const { rid, t, navigation, isMasterDetail } = this.props;
+		const { rid, t, navigation, isMasterDetail, encrypted } = this.props;
 		if (isMasterDetail) {
-			navigation.navigate('ModalStackNavigator', { screen: 'SearchMessagesView', params: { rid, showCloseModal: true } });
+			navigation.navigate('ModalStackNavigator', {
+				screen: 'SearchMessagesView',
+				params: { rid, showCloseModal: true, encrypted }
+			});
 		} else {
-			navigation.navigate('SearchMessagesView', { rid, t });
+			navigation.navigate('SearchMessagesView', { rid, t, encrypted });
 		}
 	};
 

app/views/RoomView/index.js

@@ -362,6 +362,7 @@ class RoomView extends React.Component {
 		const t = room?.t;
 		const teamMain = room?.teamMain;
 		const teamId = room?.teamId;
+		const encrypted = room?.encrypted;
 		const { id: userId, token } = user;
 		const avatar = room?.name;
 		const visitor = room?.visitor;
@@ -424,6 +425,7 @@ class RoomView extends React.Component {
 					teamMain={teamMain}
 					joined={joined}
 					t={t}
+					encrypted={encrypted}
 					navigation={navigation}
 					toggleFollowThread={this.toggleFollowThread}
 				/>

app/views/SearchMessagesView/index.js

@@ -24,8 +24,11 @@ import database from '../../lib/database';
 import { sanitizeLikeString } from '../../lib/database/utils';
 import getThreadName from '../../lib/methods/getThreadName';
 import getRoomInfo from '../../lib/methods/getRoomInfo';
+import { isIOS } from '../../utils/deviceInfo';
+import { compareServerVersion, methods } from '../../lib/utils';
 import styles from './styles';
 
+const QUERY_SIZE = 50;
 class SearchMessagesView extends React.Component {
 	static navigationOptions = ({ navigation, route }) => {
 		const options = {
@@ -43,6 +46,7 @@ class SearchMessagesView extends React.Component {
 		route: PropTypes.object,
 		user: PropTypes.object,
 		baseUrl: PropTypes.string,
+		serverVersion: PropTypes.string,
 		customEmojis: PropTypes.object,
 		theme: PropTypes.string,
 		useRealName: PropTypes.bool
@@ -55,6 +59,7 @@ class SearchMessagesView extends React.Component {
 			messages: [],
 			searchText: ''
 		};
+		this.offset = 0;
 		this.rid = props.route.params?.rid;
 		this.t = props.route.params?.t;
 		this.encrypted = props.route.params?.encrypted;
@@ -88,6 +93,9 @@ class SearchMessagesView extends React.Component {
 
 	// Handle encrypted rooms search messages
 	searchMessages = async searchText => {
+		if (!searchText) {
+			return [];
+		}
 		// If it's a encrypted, room we'll search only on the local stored messages
 		if (this.encrypted) {
 			const db = database.active;
@@ -103,25 +111,33 @@ class SearchMessagesView extends React.Component {
 				.fetch();
 		}
 		// If it's not a encrypted room, search messages on the server
-		const result = await RocketChat.searchMessages(this.rid, searchText);
+		const result = await RocketChat.searchMessages(this.rid, searchText, QUERY_SIZE, this.offset);
 		if (result.success) {
 			return result.messages;
 		}
 	};
 
-	search = debounce(async searchText => {
-		this.setState({ searchText, loading: true, messages: [] });
-
+	getMessages = async (searchText, debounced) => {
 		try {
 			const messages = await this.searchMessages(searchText);
-			this.setState({
-				messages: messages || [],
+			this.setState(prevState => ({
+				messages: debounced ? messages : [...prevState.messages, ...messages],
 				loading: false
-			});
+			}));
 		} catch (e) {
 			this.setState({ loading: false });
 			log(e);
 		}
+	};
+
+	search = searchText => {
+		this.offset = 0;
+		this.setState({ searchText, loading: true, messages: [] });
+		this.searchDebounced(searchText);
+	};
+
+	searchDebounced = debounce(async searchText => {
+		await this.getMessages(searchText, true);
 	}, 1000);
 
 	getCustomEmoji = name => {
@@ -168,6 +184,23 @@ class SearchMessagesView extends React.Component {
 		}
 	};
 
+	onEndReached = async () => {
+		const { serverVersion } = this.props;
+		const { searchText, messages, loading } = this.state;
+		if (
+			messages.length < this.offset ||
+			this.encrypted ||
+			loading ||
+			compareServerVersion(serverVersion, '3.17.0', methods.lowerThan)
+		) {
+			return;
+		}
+		this.setState({ loading: true });
+		this.offset += QUERY_SIZE;
+
+		await this.getMessages(searchText);
+	};
+
 	renderEmpty = () => {
 		const { theme } = this.props;
 		return (
@@ -212,8 +245,10 @@ class SearchMessagesView extends React.Component {
 				renderItem={this.renderItem}
 				style={[styles.list, { backgroundColor: themes[theme].backgroundColor }]}
 				keyExtractor={item => item._id}
-				onEndReached={this.load}
+				onEndReached={this.onEndReached}
 				ListFooterComponent={loading ? <ActivityIndicator theme={theme} /> : null}
+				onEndReachedThreshold={0.5}
+				removeClippedSubviews={isIOS}
 				{...scrollPersistTaps}
 			/>
 		);
@@ -243,6 +278,7 @@ class SearchMessagesView extends React.Component {
 }
 
 const mapStateToProps = state => ({
+	serverVersion: state.server.version,
 	baseUrl: state.server.server,
 	user: getUserSelector(state),
 	useRealName: state.settings.UI_Use_Real_Name,