Structure project almost by features. Start by organizing view controllers.

2026-05-02 06:06:57 +02:00 · 2018-07-05 18:51:58 +02:00
parent f26e845a13
commit fb58bbc651
119 changed files with 776 additions and 404 deletions
@@ -0,0 +1,53 @@
+/*
+ Copyright 2016 OpenMarket Ltd
+ 
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+ 
+ http://www.apache.org/licenses/LICENSE-2.0
+ 
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+
+#import "ContactsTableViewController.h"
+
+/**
+ 'StartChatViewController' instance is used to prepare new room creation.
+ */
+@interface StartChatViewController : ContactsTableViewController <UITableViewDataSource, UISearchBarDelegate, ContactsTableViewControllerDelegate>
+
+@property (weak, nonatomic) IBOutlet UIView *searchBarHeader;
+@property (weak, nonatomic) IBOutlet UISearchBar *searchBarView;
+@property (weak, nonatomic) IBOutlet UIView *searchBarHeaderBorder;
+
+@property (weak, nonatomic) IBOutlet NSLayoutConstraint *searchBarTopConstraint;
+@property (weak, nonatomic) IBOutlet NSLayoutConstraint *tableViewBottomConstraint;
+
+/**
+ Tell whether a search session is in progress
+ */
+@property (nonatomic) BOOL isAddParticipantSearchBarEditing;
+
+/**
+ Returns the `UINib` object initialized for a `StartChatViewController`.
+ 
+ @return The initialized `UINib` object or `nil` if there were errors during initialization
+ or the nib file could not be located.
+ */
+ (UINib *)nib;
+
+/**
+ Creates and returns a new `StartChatViewController` object.
+ 
+ @discussion This is the designated initializer for programmatic instantiation.
+ @return An initialized `StartChatViewController` object if successful, `nil` otherwise.
+ */
+ (instancetype)startChatViewController;
+
+@end
+
@@ -0,0 +1,692 @@
+/*
+ Copyright 2016 OpenMarket Ltd
+ Copyright 2017 Vector Creations Ltd
+ 
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+ 
+ http://www.apache.org/licenses/LICENSE-2.0
+ 
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+
+#import "StartChatViewController.h"
+
+#import "AppDelegate.h"
+
+@interface StartChatViewController ()
+{
+    // The contact used to describe the current user.
+    MXKContact *userContact;
+    
+    // Section indexes
+    NSInteger participantsSection;
+    
+    // The current list of participants.
+    NSMutableArray<MXKContact*> *participants;
+    
+    // Navigation bar items
+    UIBarButtonItem *cancelBarButtonItem;
+    UIBarButtonItem *createBarButtonItem;
+    
+    // HTTP Request
+    MXHTTPOperation *roomCreationRequest;
+    
+    // This dictionary tells for each display name whether it appears several times in participants list
+    NSMutableDictionary <NSString*, NSNumber*> *isMultiUseNameByDisplayName;
+}
+
+@end
+
+@implementation StartChatViewController
+
+#pragma mark - Class methods
+
+ (UINib *)nib
+{
+    return [UINib nibWithNibName:NSStringFromClass([StartChatViewController class])
+                          bundle:[NSBundle bundleForClass:[StartChatViewController class]]];
+}
+
+ (instancetype)startChatViewController
+{
+    return [[[self class] alloc] initWithNibName:NSStringFromClass([StartChatViewController class])
+                                          bundle:[NSBundle bundleForClass:[StartChatViewController class]]];
+}
+
+#pragma mark -
+
+- (void)finalizeInit
+{
+    [super finalizeInit];
+    
+    self.screenName = @"StartChat";
+    
+    _isAddParticipantSearchBarEditing = NO;
+    
+    // Prepare room participants
+    participants = [NSMutableArray array];
+    
+    // Assign itself as delegate
+    self.contactsTableViewControllerDelegate = self;
+}
+
+- (void)viewDidLoad
+{
+    [super viewDidLoad];
+    // Do any additional setup after loading the view, typically from a nib.
+    
+    // Adjust Top and Bottom constraints to take into account potential navBar and tabBar.
+    [NSLayoutConstraint deactivateConstraints:@[_searchBarTopConstraint, _tableViewBottomConstraint]];
+    
+    _searchBarTopConstraint = [NSLayoutConstraint constraintWithItem:self.topLayoutGuide
+                                                                  attribute:NSLayoutAttributeBottom
+                                                                  relatedBy:NSLayoutRelationEqual
+                                                                     toItem:self.searchBarHeader
+                                                                  attribute:NSLayoutAttributeTop
+                                                                 multiplier:1.0f
+                                                                   constant:0.0f];
+    
+    _tableViewBottomConstraint = [NSLayoutConstraint constraintWithItem:self.bottomLayoutGuide
+                                                                     attribute:NSLayoutAttributeTop
+                                                                     relatedBy:NSLayoutRelationEqual
+                                                                        toItem:self.contactsTableView
+                                                                     attribute:NSLayoutAttributeBottom
+                                                                    multiplier:1.0f
+                                                                      constant:0.0f];
+    
+    [NSLayoutConstraint activateConstraints:@[_searchBarTopConstraint, _tableViewBottomConstraint]];
+    
+    self.navigationItem.title = NSLocalizedStringFromTable(@"room_creation_title", @"Vector", nil);
+    
+    // Add each matrix session by default.
+    NSArray *sessions = [AppDelegate theDelegate].mxSessions;
+    for (MXSession *mxSession in sessions)
+    {
+        [self addMatrixSession:mxSession];
+    }
+
+    // Prepare its data source
+    ContactsDataSource *dataSource = [[ContactsDataSource alloc] initWithMatrixSession:self.mainSession]; // TO TEST
+    dataSource.areSectionsShrinkable = YES;
+    dataSource.displaySearchInputInContactsList = YES;
+    dataSource.forceMatrixIdInDisplayName = YES;
+    // Add a plus icon to the contact cell when a search session is in progress,
+    // in order to make it more understandable for the end user.
+    dataSource.contactCellAccessoryImage = [UIImage imageNamed:@"plus_icon"];
+
+    [self displayList:dataSource];
+
+    cancelBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(onButtonPressed:)];
+    self.navigationItem.leftBarButtonItem = cancelBarButtonItem;
+    
+    createBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:NSLocalizedStringFromTable(@"start", @"Vector", nil) style:UIBarButtonItemStylePlain target:self action:@selector(onButtonPressed:)];
+    self.navigationItem.rightBarButtonItem = createBarButtonItem;
+    
+    _searchBarView.placeholder = NSLocalizedStringFromTable(@"room_creation_invite_another_user", @"Vector", nil);
+    _searchBarView.returnKeyType = UIReturnKeyDone;
+    _searchBarView.autocapitalizationType = UITextAutocapitalizationTypeNone;    
+    [self refreshSearchBarItemsColor:_searchBarView];
+    
+    // Hide line separators of empty cells
+    self.contactsTableView.tableFooterView = [[UIView alloc] init];
+    
+    [self.contactsTableView registerClass:ContactTableViewCell.class forCellReuseIdentifier:@"ParticipantTableViewCellId"];
+    
+    // Redirect table data source
+    self.contactsTableView.dataSource = self;
+}
+
+- (void)userInterfaceThemeDidChange
+{
+    [super userInterfaceThemeDidChange];
+    
+    [self refreshSearchBarItemsColor:_searchBarView];
+    
+    _searchBarHeaderBorder.backgroundColor = kRiotAuxiliaryColor;
+    
+    // Check the table view style to select its bg color.
+    self.contactsTableView.backgroundColor = ((self.contactsTableView.style == UITableViewStylePlain) ? kRiotPrimaryBgColor : kRiotSecondaryBgColor);
+    self.view.backgroundColor = self.contactsTableView.backgroundColor;
+    
+    if (self.contactsTableView.dataSource)
+    {
+        [self.contactsTableView reloadData];
+    }
+}
+
+- (UIStatusBarStyle)preferredStatusBarStyle
+{
+    return kRiotDesignStatusBarStyle;
+}
+
+- (void)destroy
+{
+    if (roomCreationRequest)
+    {
+        [roomCreationRequest cancel];
+        roomCreationRequest = nil;
+    }
+    
+    cancelBarButtonItem = nil;
+    createBarButtonItem = nil;
+    
+    isMultiUseNameByDisplayName = nil;
+    
+    participants = nil;
+    
+    [super destroy];
+}
+
+- (void)addMatrixSession:(MXSession *)mxSession
+{
+    [super addMatrixSession:mxSession];
+    
+    // FIXME: Handle multi accounts
+    NSString *displayName = NSLocalizedStringFromTable(@"you", @"Vector", nil);
+    userContact = [[MXKContact alloc] initMatrixContactWithDisplayName:displayName andMatrixID:self.mainSession.myUser.userId];
+    
+    [self refreshParticipants];
+}
+
+- (void)viewWillAppear:(BOOL)animated
+{
+    [super viewWillAppear:animated];
+    
+    // Active the search session if the current participant list is empty
+    if (!participants.count)
+    {
+        self.isAddParticipantSearchBarEditing = YES;
+    }
+    else
+    {
+        // Refresh display
+        [self refreshContactsTable];
+    }
+}
+
+- (void)viewWillDisappear:(BOOL)animated
+{
+    [super viewWillDisappear:animated];
+ 
+    // cancel any pending search
+    [self searchBarCancelButtonClicked:_searchBarView];
+}
+
+#pragma mark -
+
+- (void)setIsAddParticipantSearchBarEditing:(BOOL)isAddParticipantSearchBarEditing
+{
+    if (_isAddParticipantSearchBarEditing != isAddParticipantSearchBarEditing)
+    {
+        if (isAddParticipantSearchBarEditing)
+        {
+            self.navigationItem.rightBarButtonItem = nil;
+        }
+        else
+        {
+            self.navigationItem.rightBarButtonItem = createBarButtonItem;
+            
+            [self refreshParticipants];
+        }
+        
+        _isAddParticipantSearchBarEditing = isAddParticipantSearchBarEditing;
+        
+        // Switch the display between search result and participants list
+        [self refreshContactsTable];
+    }
+}
+
+#pragma mark - Internals
+
+- (void)refreshParticipants
+{
+    // Refer all participants in ignored contacts dictionary.
+    isMultiUseNameByDisplayName = [NSMutableDictionary dictionary];
+    [contactsDataSource.ignoredContactsByMatrixId removeAllObjects];
+    [contactsDataSource.ignoredContactsByEmail removeAllObjects];
+    
+    for (MXKContact* contact in participants)
+    {
+        NSArray *identifiers = contact.matrixIdentifiers;
+        if (identifiers.count)
+        {
+            // Here the contact can only have one identifier
+            [contactsDataSource.ignoredContactsByMatrixId setObject:contact forKey:identifiers.firstObject];
+        }
+        else
+        {
+            NSArray *emails = contact.emailAddresses;
+            if (emails.count)
+            {
+                // Here the contact can only have one email
+                MXKEmail *email = emails.firstObject;
+                [contactsDataSource.ignoredContactsByEmail setObject:contact forKey:email.emailAddress];
+            }
+        }
+        isMultiUseNameByDisplayName[contact.displayName] = (isMultiUseNameByDisplayName[contact.displayName] ? @(YES) : @(NO));
+    }
+    
+    if (userContact)
+    {
+        [contactsDataSource.ignoredContactsByMatrixId setObject:userContact forKey:self.mainSession.myUser.userId];
+    }
+}
+
+#pragma mark - UITableView data source
+
+- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
+{
+    NSInteger count = 0;
+    
+    if (_isAddParticipantSearchBarEditing)
+    {
+        participantsSection = -1;
+        count = [contactsDataSource numberOfSectionsInTableView:tableView];
+    }
+    else
+    {
+        participantsSection = count++;
+    }
+    
+    return count;
+}
+
+- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
+{
+    NSInteger count = 0;
+    
+    if (_isAddParticipantSearchBarEditing)
+    {
+        count = [contactsDataSource tableView:tableView numberOfRowsInSection:section];
+    }
+    else if (section == participantsSection)
+    {
+        count = participants.count + 1;
+    }
+    
+    return count;
+}
+
+- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
+{
+    UITableViewCell *cell;
+    
+    if (_isAddParticipantSearchBarEditing)
+    {
+        cell = [contactsDataSource tableView:tableView cellForRowAtIndexPath:indexPath];
+    }
+    else if (indexPath.section == participantsSection)
+    {
+        ContactTableViewCell* participantCell = [tableView dequeueReusableCellWithIdentifier:@"ParticipantTableViewCellId" forIndexPath:indexPath];
+        
+        MXKContact *contact;
+        
+        if (indexPath.row == 0)
+        {
+            // oneself dedicated cell
+            contact = userContact;
+        }
+        else
+        {
+            NSInteger index = indexPath.row - 1;
+            
+            if (index < participants.count)
+            {
+                contact = participants[index];
+                
+                // Disambiguate the display name when it appears several times.
+                if (contact.displayName)
+                {
+                    participantCell.showMatrixIdInDisplayName = [isMultiUseNameByDisplayName[contact.displayName] isEqualToNumber:@(YES)];
+                }
+            }
+        }
+        
+        participantCell.selectionStyle = UITableViewCellSelectionStyleNone;
+        [participantCell render:contact];
+        
+        cell = participantCell;
+    }
+    else
+    {
+        // Return a fake cell to prevent app from crashing.
+        cell = [[UITableViewCell alloc] init];
+    }
+    
+    return cell;
+}
+
+- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
+{
+    if (indexPath.section == participantsSection && indexPath.row != 0)
+    {
+        return YES;
+    }
+    return NO;
+}
+
+- (void)tableView:(UITableView*)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath*)indexPath
+{
+    // iOS8 requires this method to enable editing (see editActionsForRowAtIndexPath).
+}
+
+#pragma mark - UITableView delegate
+
+- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath;
+{
+    cell.backgroundColor = kRiotPrimaryBgColor;
+    
+    // Update the selected background view
+    if (kRiotSelectedBgColor)
+    {
+        cell.selectedBackgroundView = [[UIView alloc] init];
+        cell.selectedBackgroundView.backgroundColor = kRiotSelectedBgColor;
+    }
+    else
+    {
+        if (tableView.style == UITableViewStylePlain)
+        {
+            cell.selectedBackgroundView = nil;
+        }
+        else
+        {
+            cell.selectedBackgroundView.backgroundColor = nil;
+        }
+    }
+}
+
+- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
+{
+    CGFloat height = 0.0;
+    
+    if (_isAddParticipantSearchBarEditing)
+    {
+        height = [contactsDataSource heightForHeaderInSection:section];
+    }
+    
+    return height;
+}
+
+- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
+{
+    if (_isAddParticipantSearchBarEditing)
+    {
+        return [super tableView:tableView heightForRowAtIndexPath:indexPath];
+    }
+    
+    return 74;
+}
+
+- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
+{
+    if (_isAddParticipantSearchBarEditing)
+    {
+        [super tableView:tableView didSelectRowAtIndexPath:indexPath];
+    }
+    else
+    {
+        // Do nothing
+        [tableView deselectRowAtIndexPath:indexPath animated:YES];
+    }
+}
+
+- (NSArray *)tableView:(UITableView *)tableView editActionsForRowAtIndexPath:(NSIndexPath *)indexPath
+{
+    NSMutableArray* actions;
+    
+    // add the swipe to delete only on participants sections
+    if (indexPath.section == participantsSection && indexPath.row != 0)
+    {
+        actions = [[NSMutableArray alloc] init];
+        
+        // Patch: Force the width of the button by adding whitespace characters into the title string.
+        UITableViewRowAction *leaveAction = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDestructive title:@"        "  handler:^(UITableViewRowAction *action, NSIndexPath *indexPath){
+            
+            [self onDeleteAt:indexPath];
+        
+        }];
+        
+        leaveAction.backgroundColor = [MXKTools convertImageToPatternColor:@"remove_icon" backgroundColor:kRiotSecondaryBgColor patternSize:CGSizeMake(74, 74) resourceSize:CGSizeMake(24, 24)];
+        [actions insertObject:leaveAction atIndex:0];
+    }
+    
+    return actions;
+}
+
+#pragma mark - Actions
+
+- (void)onDeleteAt:(NSIndexPath*)path
+{
+    NSInteger row = path.row;
+    row --;
+    
+    if (row < participants.count)
+    {
+        [participants removeObjectAtIndex:row];
+        
+        [self refreshParticipants];
+        
+        [self refreshContactsTable];
+    }
+}
+
+- (IBAction)onButtonPressed:(id)sender
+{
+    if (sender == createBarButtonItem)
+    {
+        // Disable button to prevent multiple request
+        createBarButtonItem.enabled = NO;
+        [self startActivityIndicator];
+        
+        // Prepare the invited participant data
+        NSMutableArray *inviteArray = [NSMutableArray array];
+        NSMutableArray *invite3PIDArray = [NSMutableArray array];
+        
+        // Check whether some users must be invited
+        for (MXKContact *contact in participants)
+        {
+            NSArray *identifiers = contact.matrixIdentifiers;
+            if (identifiers.count)
+            {
+                [inviteArray addObject:identifiers.firstObject];
+            }
+            else
+            {
+                // This is a text entered by the user, or a local contact
+                NSString *participantId;
+                
+                if (contact.emailAddresses.count)
+                {
+                    // This is a local contact, consider the first email by default.
+                    // TODO: Prompt the user to select the right email.
+                    MXKEmail *email = contact.emailAddresses.firstObject;
+                    participantId = email.emailAddress;
+                }
+                else
+                {
+                    // This is the text filled by the user.
+                    participantId = contact.displayName;
+                }
+                
+                // Is it an email or a Matrix user ID?
+                if ([MXTools isEmailAddress:participantId])
+                {
+                    // The identity server must be defined
+                    if (!self.mainSession.matrixRestClient.identityServer)
+                    {
+                        MXError *error = [[MXError alloc] initWithErrorCode:kMXSDKErrCodeStringMissingParameters error:@"No supplied identity server URL"];
+                        NSLog(@"[StartChatViewController] Invite %@ failed", participantId);
+                        // Alert user
+                        [[AppDelegate theDelegate] showErrorAsAlert:[error createNSError]];
+                        
+                        continue;
+                    }
+                    
+                    // The hostname of the identity server must not have the protocol part
+                    NSString *identityServer = self.mainSession.matrixRestClient.identityServer;
+                    if ([identityServer hasPrefix:@"http://"] || [identityServer hasPrefix:@"https://"])
+                    {
+                        identityServer = [identityServer substringFromIndex:[identityServer rangeOfString:@"://"].location + 3];
+                    }
+                    
+                    MXInvite3PID *invite3PID = [[MXInvite3PID alloc] init];
+                    invite3PID.identityServer = identityServer;
+                    invite3PID.medium = kMX3PIDMediumEmail;
+                    invite3PID.address = participantId;
+                    
+                    [invite3PIDArray addObject:invite3PID];
+                }
+                else
+                {
+                    [inviteArray addObject:participantId];
+                }
+            }
+        }
+        
+        // Is it a direct chat?
+        BOOL isDirect = ((inviteArray.count + invite3PIDArray.count == 1) ? YES : NO);
+        
+        // In case of a direct chat with only one user id, we open the first available direct chat
+        // or creates a new one (if it doesn't exist).
+        if (isDirect && inviteArray.count)
+        {
+            [[AppDelegate theDelegate] startDirectChatWithUserId:inviteArray.firstObject completion:^{
+                
+                [self stopActivityIndicator];
+                
+            }];
+        }
+        else
+        {
+            // Ensure direct chat are created with equal ops on both sides (the trusted_private_chat preset)
+            MXRoomPreset preset = (isDirect ? kMXRoomPresetTrustedPrivateChat : nil);
+            
+            // Create new room
+            roomCreationRequest = [self.mainSession createRoom:nil
+                                                    visibility:kMXRoomDirectoryVisibilityPrivate
+                                                     roomAlias:nil
+                                                         topic:nil
+                                                        invite:(inviteArray.count ? inviteArray : nil)
+                                                    invite3PID:(invite3PIDArray.count ? invite3PIDArray : nil)
+                                                      isDirect:isDirect
+                                                        preset:preset
+                                                       success:^(MXRoom *room) {
+                                                           
+                                                           roomCreationRequest = nil;
+                                                           
+                                                           [self stopActivityIndicator];
+                                                           
+                                                           [[AppDelegate theDelegate] showRoom:room.state.roomId andEventId:nil withMatrixSession:self.mainSession];
+                                                           
+                                                       } failure:^(NSError *error) {
+                                                           
+                                                           createBarButtonItem.enabled = YES;
+                                                           
+                                                           roomCreationRequest = nil;
+                                                           [self stopActivityIndicator];
+                                                           
+                                                           NSLog(@"[StartChatViewController] Create room failed");
+                                                           
+                                                           // Alert user
+                                                           [[AppDelegate theDelegate] showErrorAsAlert:error];
+                                                           
+                                                       }];
+        }
+    }
+    else if (sender == self.navigationItem.leftBarButtonItem)
+    {
+        // Cancel has been pressed
+        if (_isAddParticipantSearchBarEditing && participants.count)
+        {
+            // Cancel the search process
+            [self searchBarCancelButtonClicked:_searchBarView];
+        }
+        else
+        {
+            // Cancel the new chat creation
+            [self.navigationController dismissViewControllerAnimated:YES completion:nil];
+        }
+    }
+}
+
+#pragma mark - UISearchBar delegate
+
+- (void)refreshSearchBarItemsColor:(UISearchBar *)searchBar
+{
+    // bar tint color
+    searchBar.barTintColor = searchBar.tintColor = kRiotColorGreen;
+    searchBar.tintColor = kRiotColorGreen;
+    
+    // FIXME: this all seems incredibly fragile and tied to gutwrenching the current UISearchBar internals.
+
+    // text color
+    UITextField *searchBarTextField = [searchBar valueForKey:@"_searchField"];
+    searchBarTextField.textColor = kRiotSecondaryTextColor;
+    
+    // Magnifying glass icon.
+    UIImageView *leftImageView = (UIImageView *)searchBarTextField.leftView;
+    leftImageView.image = [leftImageView.image imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
+    leftImageView.tintColor = kRiotColorGreen;
+    
+    // remove the gray background color
+    UIView *effectBackgroundTop =  [searchBarTextField valueForKey:@"_effectBackgroundTop"];
+    UIView *effectBackgroundBottom =  [searchBarTextField valueForKey:@"_effectBackgroundBottom"];
+    effectBackgroundTop.hidden = YES;
+    effectBackgroundBottom.hidden = YES;
+        
+    // place holder
+    if (searchBarTextField.placeholder)
+    {
+        searchBarTextField.attributedPlaceholder = [[NSAttributedString alloc] initWithString:searchBarTextField.placeholder
+                                                                                   attributes:@{NSUnderlineStyleAttributeName: @(NSUnderlineStyleSingle),
+                                                                                                NSUnderlineColorAttributeName: kRiotColorGreen,
+                                                                                                NSForegroundColorAttributeName: kRiotColorGreen}];
+    }
+}
+
+- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
+{
+    [contactsDataSource searchWithPattern:searchText forceReset:NO];
+}
+
+- (BOOL)searchBarShouldBeginEditing:(UISearchBar *)searchBar
+{    
+    self.isAddParticipantSearchBarEditing = YES;
+    searchBar.showsCancelButton = NO;
+    
+    return YES;
+}
+
+- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar
+{
+    searchBar.text = nil;
+    self.isAddParticipantSearchBarEditing = NO;
+    
+    // Reset filtering
+    [contactsDataSource searchWithPattern:nil forceReset:NO];
+    
+    // Leave search
+    [searchBar resignFirstResponder];
+}
+
+#pragma mark - ContactsTableViewControllerDelegate
+
+- (void)contactsTableViewController:(ContactsTableViewController *)contactsTableViewController didSelectContact:(MXKContact*)contact
+{
+    if (contact)
+    {
+        // Update here the mutable list of participants
+        [participants addObject:contact];
+    }
+    
+    // Refresh display by leaving search session
+    [self searchBarCancelButtonClicked:_searchBarView];
+}
+
+@end
@@ -0,0 +1,86 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="12121" systemVersion="16F73" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES">
+    <device id="retina4_7" orientation="portrait">
+        <adaptation id="fullscreen"/>
+    </device>
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="12089"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+    </dependencies>
+    <objects>
+        <placeholder placeholderIdentifier="IBFilesOwner" id="-1" userLabel="File's Owner" customClass="StartChatViewController">
+            <connections>
+                <outlet property="contactsTableView" destination="kNf-Ll-jvH" id="PDi-bW-2CG"/>
+                <outlet property="searchBarHeader" destination="Zm7-AB-ZtE" id="6ee-P0-twi"/>
+                <outlet property="searchBarHeaderBorder" destination="gcy-W7-89G" id="tsy-SP-KaJ"/>
+                <outlet property="searchBarTopConstraint" destination="sUb-hD-qXJ" id="rzi-JJ-nnP"/>
+                <outlet property="searchBarView" destination="bsq-3U-VjV" id="x3M-wX-RW8"/>
+                <outlet property="tableViewBottomConstraint" destination="jLY-ml-Psl" id="Q2b-sC-Yqn"/>
+                <outlet property="view" destination="iN0-l3-epB" id="csR-cn-S4h"/>
+            </connections>
+        </placeholder>
+        <placeholder placeholderIdentifier="IBFirstResponder" id="-2" customClass="UIResponder"/>
+        <view contentMode="scaleToFill" id="iN0-l3-epB">
+            <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
+            <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+            <subviews>
+                <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="Zm7-AB-ZtE">
+                    <rect key="frame" x="0.0" y="0.0" width="375" height="50"/>
+                    <subviews>
+                        <searchBar contentMode="redraw" searchBarStyle="minimal" translatesAutoresizingMaskIntoConstraints="NO" id="bsq-3U-VjV">
+                            <rect key="frame" x="0.0" y="0.0" width="375" height="50"/>
+                            <textInputTraits key="textInputTraits" returnKeyType="done"/>
+                            <userDefinedRuntimeAttributes>
+                                <userDefinedRuntimeAttribute type="string" keyPath="accessibilityIdentifier" value="StartChatVCSearchBarView"/>
+                            </userDefinedRuntimeAttributes>
+                            <connections>
+                                <outlet property="delegate" destination="-1" id="UYv-bz-JBZ"/>
+                            </connections>
+                        </searchBar>
+                        <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="gcy-W7-89G">
+                            <rect key="frame" x="0.0" y="49" width="375" height="1"/>
+                            <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                            <constraints>
+                                <constraint firstAttribute="height" constant="1" id="Rka-an-qn3"/>
+                            </constraints>
+                        </view>
+                    </subviews>
+                    <color key="backgroundColor" white="0.0" alpha="0.0" colorSpace="calibratedWhite"/>
+                    <accessibility key="accessibilityConfiguration" identifier="StartChatVCSearchBar"/>
+                    <constraints>
+                        <constraint firstItem="gcy-W7-89G" firstAttribute="leading" secondItem="Zm7-AB-ZtE" secondAttribute="leading" id="4Yn-dN-O2U"/>
+                        <constraint firstItem="bsq-3U-VjV" firstAttribute="leading" secondItem="Zm7-AB-ZtE" secondAttribute="leading" id="6ze-Az-ymf"/>
+                        <constraint firstAttribute="bottom" secondItem="bsq-3U-VjV" secondAttribute="bottom" id="KDW-SI-sG6"/>
+                        <constraint firstAttribute="trailing" secondItem="bsq-3U-VjV" secondAttribute="trailing" id="ZlE-SL-UfQ"/>
+                        <constraint firstAttribute="trailing" secondItem="gcy-W7-89G" secondAttribute="trailing" id="hqD-vA-OM5"/>
+                        <constraint firstAttribute="bottom" secondItem="gcy-W7-89G" secondAttribute="bottom" id="ibU-h7-mHt"/>
+                        <constraint firstAttribute="height" constant="50" id="kSM-fg-IHB"/>
+                        <constraint firstItem="bsq-3U-VjV" firstAttribute="top" secondItem="Zm7-AB-ZtE" secondAttribute="top" id="qpF-Za-XTL"/>
+                    </constraints>
+                </view>
+                <tableView clipsSubviews="YES" contentMode="scaleToFill" alwaysBounceVertical="YES" keyboardDismissMode="onDrag" style="plain" separatorStyle="default" rowHeight="44" sectionHeaderHeight="28" sectionFooterHeight="28" translatesAutoresizingMaskIntoConstraints="NO" id="kNf-Ll-jvH">
+                    <rect key="frame" x="0.0" y="50" width="375" height="617"/>
+                    <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                    <userDefinedRuntimeAttributes>
+                        <userDefinedRuntimeAttribute type="string" keyPath="accessibilityIdentifier" value="StartChatVCTableView"/>
+                    </userDefinedRuntimeAttributes>
+                    <connections>
+                        <outlet property="dataSource" destination="-1" id="tlI-w1-VJw"/>
+                        <outlet property="delegate" destination="-1" id="xcS-Zy-x2X"/>
+                    </connections>
+                </tableView>
+            </subviews>
+            <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+            <constraints>
+                <constraint firstAttribute="trailing" secondItem="Zm7-AB-ZtE" secondAttribute="trailing" id="0W7-Iv-Cs1"/>
+                <constraint firstAttribute="trailing" secondItem="kNf-Ll-jvH" secondAttribute="trailing" id="1KS-nO-Jys"/>
+                <constraint firstItem="Zm7-AB-ZtE" firstAttribute="leading" secondItem="iN0-l3-epB" secondAttribute="leading" id="Irh-6y-0cw"/>
+                <constraint firstItem="kNf-Ll-jvH" firstAttribute="leading" secondItem="iN0-l3-epB" secondAttribute="leading" id="hfq-4u-4J8"/>
+                <constraint firstAttribute="bottom" secondItem="kNf-Ll-jvH" secondAttribute="bottom" id="jLY-ml-Psl"/>
+                <constraint firstItem="Zm7-AB-ZtE" firstAttribute="top" secondItem="iN0-l3-epB" secondAttribute="top" id="sUb-hD-qXJ"/>
+                <constraint firstItem="kNf-Ll-jvH" firstAttribute="top" secondItem="Zm7-AB-ZtE" secondAttribute="bottom" id="tYv-VV-8dI"/>
+            </constraints>
+        </view>
+    </objects>
+</document>