mirror of
https://github.com/vector-im/element-ios.git
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367 lines
9.6 KiB
Objective-C
367 lines
9.6 KiB
Objective-C
/*
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Copyright 2015 OpenMarket Ltd
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Copyright 2017 Vector Creations Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#import "PublicRoomsDirectoryDataSource.h"
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#import "PublicRoomTableViewCell.h"
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#import "AppDelegate.h"
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#pragma mark - Constants definitions
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// Time in seconds from which public rooms data is considered as obsolete
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double const kPublicRoomsDirectoryDataExpiration = 10;
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#pragma mark - PublicRoomsDirectoryDataSource
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@interface PublicRoomsDirectoryDataSource ()
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{
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// The pending request to refresh public rooms data.
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MXHTTPOperation *publicRoomsRequest;
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/**
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All public rooms fetched so far.
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*/
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NSMutableArray<MXPublicRoom*> *rooms;
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/**
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The next token to use for pagination.
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*/
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NSString *nextBatch;
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}
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@end
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@implementation PublicRoomsDirectoryDataSource
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- (instancetype)init
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{
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self = [super init];
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if (self)
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{
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rooms = [NSMutableArray array];
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_paginationLimit = 20;
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}
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return self;
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}
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- (NSString *)directoryServerDisplayname
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{
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NSString *directoryServerDisplayname;
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if (_homeserver)
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{
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directoryServerDisplayname = _homeserver;
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}
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else if (_thirdpartyProtocolInstance)
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{
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directoryServerDisplayname = _thirdpartyProtocolInstance.desc;
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}
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else
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{
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if (_includeAllNetworks)
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{
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// We display all rooms, included bridged ones, of the user's HS
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directoryServerDisplayname = self.mxSession.matrixRestClient.credentials.homeServerName;
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}
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else
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{
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// We display only Matrix rooms of the user's HS
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directoryServerDisplayname = [NSBundle mxk_localizedStringForKey:@"matrix"];
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}
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}
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return directoryServerDisplayname;
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}
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- (void)setHomeserver:(NSString *)homeserver
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{
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if ([homeserver isEqualToString:self.mxSession.matrixRestClient.credentials.homeServerName])
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{
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// The CS API does not like we pass the user's HS as parameter
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homeserver = nil;
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}
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_thirdpartyProtocolInstance = nil;
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if (homeserver != _homeserver)
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{
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_homeserver = homeserver;
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// Reset data
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[self resetPagination];
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}
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}
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- (void)setIncludeAllNetworks:(BOOL)includeAllNetworks
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{
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if (includeAllNetworks != _includeAllNetworks)
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{
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_includeAllNetworks = includeAllNetworks;
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// Reset data
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[self resetPagination];
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}
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}
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- (void)setThirdpartyProtocolInstance:(MXThirdPartyProtocolInstance *)thirdpartyProtocolInstance
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{
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if (thirdpartyProtocolInstance != _thirdpartyProtocolInstance)
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{
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_homeserver = nil;
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_includeAllNetworks = NO;
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_thirdpartyProtocolInstance = thirdpartyProtocolInstance;
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// Reset data
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[self resetPagination];
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}
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}
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- (void)setSearchPattern:(NSString *)searchPattern
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{
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if (searchPattern)
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{
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if (![searchPattern isEqualToString:_searchPattern])
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{
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_searchPattern = searchPattern;
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[self resetPagination];
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}
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}
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else
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{
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// Refresh if the previous search was not nil
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// or if it is the first time we make a search
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if (_searchPattern || rooms.count == 0)
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{
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_searchPattern = searchPattern;
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[self resetPagination];
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}
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}
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}
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- (NSIndexPath*)cellIndexPathWithRoomId:(NSString*)roomId andMatrixSession:(MXSession*)matrixSession
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{
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NSIndexPath *indexPath = nil;
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// Look for the public room
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for (NSInteger index = 0; index < rooms.count; index ++)
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{
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MXPublicRoom *room = rooms[index];
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if ([roomId isEqualToString:room.roomId])
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{
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// Got it
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indexPath = [NSIndexPath indexPathForRow:index inSection:0];
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break;
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}
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}
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return indexPath;
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}
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- (MXPublicRoom *)roomAtIndexPath:(NSIndexPath *)indexPath
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{
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MXPublicRoom *room;
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if (indexPath.row < rooms.count)
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{
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room = rooms[indexPath.row];
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}
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return room;
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}
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- (CGFloat)cellHeightAtIndexPath:(NSIndexPath*)indexPath
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{
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if (indexPath.row < rooms.count)
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{
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return PublicRoomTableViewCell.cellHeight;
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}
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return 50.0;
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}
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- (void)resetPagination
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{
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// Cancel the previous request
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if (publicRoomsRequest)
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{
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[publicRoomsRequest cancel];
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}
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// Reset all pagination vars
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[rooms removeAllObjects];
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nextBatch = nil;
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_roomsCount = 0;
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_moreThanRoomsCount = NO;
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_hasReachedPaginationEnd = NO;
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}
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- (MXHTTPOperation *)paginate:(void (^)(NSUInteger))complete failure:(void (^)(NSError *))failure
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{
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if (_hasReachedPaginationEnd)
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{
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if (complete)
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{
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complete(0);
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}
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return nil;
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}
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[self setState:MXKDataSourceStatePreparing];
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__weak typeof(self) weakSelf = self;
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// Get the public rooms from the server
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MXHTTPOperation *newPublicRoomsRequest;
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newPublicRoomsRequest = [self.mxSession.matrixRestClient publicRoomsOnServer:_homeserver limit:_paginationLimit since:nextBatch filter:_searchPattern thirdPartyInstanceId:_thirdpartyProtocolInstance.instanceId includeAllNetworks:_includeAllNetworks success:^(MXPublicRoomsResponse *publicRoomsResponse) {
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if (weakSelf)
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{
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typeof(self) self = weakSelf;
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self->publicRoomsRequest = nil;
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[self->rooms addObjectsFromArray:publicRoomsResponse.chunk];
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self->nextBatch = publicRoomsResponse.nextBatch;
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if (!self->_searchPattern)
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{
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// When there is no search, we can use totalRoomCountEstimate returned by the server
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self->_roomsCount = publicRoomsResponse.totalRoomCountEstimate;
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self->_moreThanRoomsCount = NO;
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}
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else
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{
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// Else we can only display something like ">20 matching rooms"
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self->_roomsCount = self->rooms.count;
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self->_moreThanRoomsCount = publicRoomsResponse.nextBatch ? YES : NO;
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}
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// Detect pagination end
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if (!publicRoomsResponse.nextBatch)
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{
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_hasReachedPaginationEnd = YES;
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}
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[self setState:MXKDataSourceStateReady];
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if (complete)
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{
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complete(publicRoomsResponse.chunk.count);
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}
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}
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} failure:^(NSError *error) {
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if (weakSelf)
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{
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typeof(self) self = weakSelf;
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if (!newPublicRoomsRequest || newPublicRoomsRequest.isCancelled)
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{
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// Do not take into account error coming from a cancellation
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return;
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}
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self->publicRoomsRequest = nil;
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NSLog(@"[PublicRoomsDirectoryDataSource] Failed to fecth public rooms.");
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[self setState:MXKDataSourceStateFailed];
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// Alert user
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[[AppDelegate theDelegate] showErrorAsAlert:error];
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if (failure)
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{
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failure(error);
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}
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}
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}];
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publicRoomsRequest = newPublicRoomsRequest;
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return publicRoomsRequest;
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}
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#pragma mark - Private methods
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// Update the MXKDataSource state and the delegate
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- (void)setState:(MXKDataSourceState)newState
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{
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state = newState;
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if (self.delegate && [self.delegate respondsToSelector:@selector(dataSource:didStateChange:)])
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{
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[self.delegate dataSource:self didStateChange:state];
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}
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}
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#pragma mark - UITableViewDataSource
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- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
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{
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// Display a default cell when no rooms is available.
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return rooms.count ? rooms.count : 1;
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}
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- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
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{
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// Sanity check
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if (indexPath.row < rooms.count)
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{
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PublicRoomTableViewCell *publicRoomCell = [tableView dequeueReusableCellWithIdentifier:[PublicRoomTableViewCell defaultReuseIdentifier]];
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if (!publicRoomCell)
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{
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publicRoomCell = [[PublicRoomTableViewCell alloc] init];
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}
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[publicRoomCell render:rooms[indexPath.row] withMatrixSession:self.mxSession];
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return publicRoomCell;
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}
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else
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{
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MXKTableViewCell *tableViewCell = [tableView dequeueReusableCellWithIdentifier:[MXKTableViewCell defaultReuseIdentifier]];
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if (!tableViewCell)
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{
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tableViewCell = [[MXKTableViewCell alloc] init];
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tableViewCell.textLabel.textColor = kRiotTextColorGray;
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tableViewCell.textLabel.font = [UIFont systemFontOfSize:15.0];
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tableViewCell.selectionStyle = UITableViewCellSelectionStyleNone;
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}
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if (state == MXKDataSourceStateReady)
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{
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if (_searchPattern.length)
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{
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tableViewCell.textLabel.text = NSLocalizedStringFromTable(@"search_no_result", @"Vector", nil);
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}
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else
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{
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tableViewCell.textLabel.text = NSLocalizedStringFromTable(@"room_directory_no_public_room", @"Vector", nil);
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}
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}
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else
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{
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// Show nothing while loading and in other cases
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tableViewCell.textLabel.text = @"";
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}
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return tableViewCell;
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}
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}
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@end
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