ServerTableController.m #1

//
//  ServerTableController.m
//  p4scout
//
//  Created by Work on 8/30/08.
//  Copyright 2008 Perforce Software, Inc. All rights reserved.
//

#import "ServerTableController.h"
#import "ServerDetailViewController.h"
#import "P4ConnectionEditor.h"
#import "P4Server.h"
#import "ServerTableCell.h"
#import "p4scoutAppDelegate.h"
#import "UIToolbarAdditions.h"
#import "P4DefaultsKeys.h"

#define CellActivityViewTag 1

// Uncomment this to update the suggested label dynamically when entering
// server information in the form.
//#define SHOW_SUGGESTED_LABEL


static const int ActivityButtonBarItemPosition = 2;

enum eTableSections {
    SavedServers = 0
  , FoundServers
  , NumberOfSections
};

@interface ServerTableController ()

-(void)initMemberVariables;
-(UITableViewCell*)visibleCellForServer:(P4Server*)server;
-(void)configureCell:(UITableViewCell *)cell withServer:(P4Server *)server;
-(void)updateRefreshButton;
-(int)reachableServerCount;
-(void)addActiveServer:(P4Server*)server;
-(void)removeActiveServer:(P4Server*)server;
-(void)stopObservingServer:(P4Server*)server;
-(void)startObservingServer:(P4Server*)server;

@end


@implementation ServerTableController
@synthesize servers=_servers, tableView=_tableView, browsing;
@synthesize refreshButton;


-(id)initWithNibName:(NSString *)nibName bundle:(NSBundle *)nibBundle
{
    // Override initWithStyle: if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad.
    if (!(self = [super initWithNibName:nibName bundle:nibBundle]))
        return self;
    [self initMemberVariables];
    return self;
}

- (id)initWithCoder:(NSCoder *)decoder
{
    // Override initWithStyle: if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad.
    if (!(self = [super initWithCoder:decoder]))
        return self;
    [self initMemberVariables];
    return self;
}

-(void)initMemberVariables
{
    _servers = [[NSMutableArray arrayWithCapacity:1] retain];
    foundServers = [[NSMutableArray arrayWithCapacity:1] retain];
    serverBrowser = [[NSNetServiceBrowser alloc] init];
    serverBrowser.delegate = self;
    [serverBrowser scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
}

- (void)dealloc {
    for ( P4Server * server in _servers )
    {
        [self stopObservingServer:server];
    }
    
    for ( P4Server * server in foundServers )
    {
        [self stopObservingServer:server];
    }
    
    [_servers release];
    [foundServers release];
    [_tableView release];
    [serverBrowser removeFromRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
    [serverBrowser release];
    [super dealloc];
}

// Implement viewDidLoad to do additional setup after loading the view.
- (void)viewDidLoad {
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(applicationDidFinishLaunching:)
                                                 name:UIApplicationDidFinishLaunchingNotification
                                               object:nil];

    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    [defaults addObserver:self forKeyPath:kServerDiscoveryPreferenceKey options:NSKeyValueObservingOptionNew context:nil];
    [defaults addObserver:self forKeyPath:kDefaultUserPreferenceKey options:NSKeyValueObservingOptionNew context:nil];
    
    [super viewDidLoad];
}


- (void)viewDidUnload {
    [[NSNotificationCenter defaultCenter] removeObserver:self
                                                 name:UIApplicationDidFinishLaunchingNotification
                                               object:nil];
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    [defaults removeObserver:self forKeyPath:kServerDiscoveryPreferenceKey];
    [defaults removeObserver:self forKeyPath:kDefaultUserPreferenceKey];
}


-(void)applicationDidFinishLaunching:(NSNotification *)notification
{
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    self.browsing = [defaults boolForKey:kServerDiscoveryPreferenceKey];
}

#pragma mark NSNetService methods


-(void)netService:(NSNetService *)netService didNotResolve:(NSDictionary *)errorDict
{
    for (P4Server * server in foundServers)
    {
        if (![server.label isEqualToString:netService.name])
            continue;

        [self stopObservingServer:server];
        [foundServers removeObject:server];
        [_tableView reloadData];
        break;

    }
    [netService stop];
    [netService removeFromRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
    [netService release];
}

-(void)netServiceDidResolveAddress:(NSNetService *)netService
{
    for (P4Server * server in foundServers)
    {
        if (![server.label isEqualToString:netService.name])
            continue;

        server.p4port = [NSString stringWithFormat:@"%@:%d", netService.hostName, netService.port];
        [server refresh:self];
        break;
    }
    [netService stop];
    [netService removeFromRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
    [netService release];
}

-(void)netServiceBrowser:(NSNetServiceBrowser *)netServiceBrowser
          didFindService:(NSNetService *)netService
              moreComing:(BOOL)moreServicesComing
{
    P4Server * server = [[[P4Server alloc] initAsDiscovered:YES] autorelease];

    server.label = netService.name;
    
    // we'll set the p4port value after we've resolved the address to avoid further
    // lookups by the client API
//    server.p4port = netService.name;

    [netService scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
    netService.delegate = self;
    [netService retain];
    [netService resolveWithTimeout:60];
    [self startObservingServer:server];
    [foundServers addObject:server];

    if (!moreServicesComing )
    {
        [_tableView reloadData];
        [self updateRefreshButton];
    }
}

-(void)netServiceBrowser:(NSNetServiceBrowser *)netServiceBrowser
        didRemoveService:(NSNetService *)netService
              moreComing:(BOOL)moreServicesComing
{
    for (P4Server * server in foundServers)
    {
        if ([server.label isEqualToString:netService.name])
        {
            [self stopObservingServer:server];
            [foundServers removeObject:server];
            break;
        }
    }

    if ( !moreServicesComing )
    {
        [_tableView reloadData];
        [self updateRefreshButton];
    }
}
    
    
-(NSArray*)serverListForSection:(int)section
{
    switch (section) {
        case SavedServers:
            return _servers;
            break;
        case FoundServers:
            return foundServers;
            break;
        default:
            NSAssert(false, @"Should never hit default condition!");
            return 0;
            break;
    }
}

-(P4Server*)serverForIndexPath:(NSIndexPath*)indexPath
{
    NSArray * serverList = [self serverListForSection:indexPath.section];
    P4Server * s = [serverList objectAtIndex:indexPath.row];
    return s;
}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    if ( foundServers.count )
        return NumberOfSections;
    return 1;
}

-(void)startObservingServer:(P4Server*)server
{
    [server addObserver:self forKeyPath:InfoPropertyKey options:NSKeyValueObservingOptionNew context:NULL];
    [server addObserver:self forKeyPath:ConnectionStatePropertyKey options:NSKeyValueObservingOptionNew context:NULL];
    [server addObserver:self forKeyPath:ActivePropertyKey options:NSKeyValueObservingOptionNew context:NULL];
    [server addObserver:self forKeyPath:ReachablePropertyKey options:NSKeyValueObservingOptionNew context:NULL];
    [server addObserver:self forKeyPath:LabelPropertyKey options:NSKeyValueObservingOptionNew context:NULL];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(serverErrorReceived:) name:P4ServerErrorReceivedNotification object:server];
}

-(void)stopObservingServer:(P4Server*)s
{
    [s removeObserver:self forKeyPath:ConnectionStatePropertyKey];
    [s removeObserver:self forKeyPath:InfoPropertyKey];
    [s removeObserver:self forKeyPath:ActivePropertyKey];
    [s removeObserver:self forKeyPath:ReachablePropertyKey];
    [s removeObserver:self forKeyPath:LabelPropertyKey];
    [[NSNotificationCenter defaultCenter] removeObserver:self name:P4ServerErrorReceivedNotification object:s];
}

-(void)serverErrorReceived:(NSNotification*)errorNotification
{
    UITableViewCell *cell = [self visibleCellForServer:[errorNotification object]];
    if ( cell )
        [self configureCell:cell withServer:[errorNotification object]];
}

-(void)removeServer:(P4Server *)s
{
    if ( s == nil )
        return;
        
    if ( [_servers containsObject:s] || [foundServers containsObject:s] )
    {
        [self stopObservingServer:s];
        if ( s.active )
            [self removeActiveServer:s];
        
        if ( [_servers containsObject:s] )
        {
            NSIndexPath * indexPath = [NSIndexPath indexPathForRow:[_servers indexOfObject:s] inSection:SavedServers];

            [_servers removeObject:s];
            [self.tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath]
                withRowAnimation:UITableViewRowAnimationRight];
        }
        else if ( [foundServers containsObject:s] )
        {
            NSIndexPath * indexPath = [NSIndexPath indexPathForRow:[foundServers indexOfObject:s] inSection:FoundServers];
            [foundServers removeObject:s];
            
            if ( [foundServers count] == 0 )
            {
                [self.tableView deleteSections:[NSIndexSet indexSetWithIndex:FoundServers] withRowAnimation:UITableViewRowAnimationNone];
            }
            else
            {
                [self.tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath]
                    withRowAnimation:UITableViewRowAnimationNone];
            }
        }
        [self updateRefreshButton];
    }
}

-(void)addServer:(P4Server *)s
{
    if ( s == nil )
        return;
    if ( [_servers containsObject:s] )
        return;
    
    if ( s.active )
        [self addActiveServer:s];
    [self startObservingServer:s];
    [_servers addObject:s];
    [self.tableView reloadData];
    [self updateRefreshButton];
}


-(void)setServers:(NSArray *)s
{
    if ( s == _servers )
        return;

    for ( P4Server * server in _servers )
    {
        [self stopObservingServer:server];
        if ( server.active )
            [self removeActiveServer:server];
    }

    [_servers release]; _servers = nil;
    if (!s)
        return;
    _servers = [[NSMutableArray arrayWithArray:s] retain];
    
    for ( P4Server * server in _servers )
    {
        [self startObservingServer:server];
        if ( server.active )
            [self addActiveServer:server];
    }

    [self.tableView reloadData];
    [self updateRefreshButton];
}

-(UITableViewCell*)visibleCellForServer:(P4Server*)server
{
    NSArray *visibleCells = self.tableView.visibleCells;
    NSArray *indexPaths = self.tableView.indexPathsForVisibleRows;

    if ([visibleCells count] == 0)
        return nil;
    if ([indexPaths count] == 0)
        return nil;

    int i = 0;
    for (UITableViewCell *cell in visibleCells) {
        NSIndexPath * indexPath = [indexPaths objectAtIndex:i++];
        P4Server * searchedServer = [self serverForIndexPath:indexPath];
        if ( searchedServer == server)
        {
            return cell;
        }
    }
    return nil;
}

-(NSString *)nameForServer:(P4Server *)server
{
    NSString * name = server.label;

#ifdef SHOW_SUGGESTED_LABEL
    if ( name == nil && server.connectionState == Online )
        name = [server.info objectForKey:@"serverName"];

    if (name == nil && server.connectionState == Online)
        name = [server.info objectForKey:@"serverAddress"];
#endif

    if (name == nil)
        name   = server.p4port;

    if (name == nil)
        name   = @"perforce:1666";
    return name;
}


-(void)configureCell:(UITableViewCell *)c withServer:(P4Server *)s
{
    ServerTableCell * cell = (ServerTableCell*)c;

    UIActivityIndicatorView * activityView = cell.activityView;
    UIImageView * imageView = cell.imageView;
    UILabel * serverLabel = cell.serverLabel;
    
    serverLabel.text = [self nameForServer:s];

    if ( activityView )
    {
        if ( s.active )
            [activityView startAnimating];
        else
            [activityView stopAnimating];
    }
    
    switch ( s.connectionState )
    {
        case Connecting:
        case Online:
            imageView.image = [UIImage imageNamed:@"StatusOnline.png"];
            break;

        case Offline:
            imageView.image = [UIImage imageNamed:@"StatusOffline.png"];
            break;

        case Idle:
            break;

        default:
            NSAssert(NO, @"Unrecognized connectionState");
            break;
    }

    if (s.hasAlert )
        imageView.image  = [UIImage imageNamed:@"StatusAlert.png"];

    if (!s.reachable )
    {
        imageView.image  = [UIImage imageNamed:@"StatusUnreachable.png"];
    }
}


-(void)addActiveServer:(P4Server*)server
{
    numberOfActiveServers++;
    if ( numberOfActiveServers == 1 )
    {
        [toolbar insertItem:activityIndicatorViewItem inItemsAtIndex:ActivityButtonBarItemPosition animated:NO];
        [activityIndicatorView startAnimating];
        statusLabel.textAlignment = UITextAlignmentLeft;
        statusLabel.text = @"Updating...";
    }
}

-(void)removeActiveServer:(P4Server*)server
{
    numberOfActiveServers--;
    if ( numberOfActiveServers == 0 )
    {
        [activityIndicatorView stopAnimating];
        [toolbar removeItemFromItemsAtIndex:ActivityButtonBarItemPosition animated:NO];
        statusLabel.textAlignment = UITextAlignmentCenter;
        
        NSDateFormatter * dateFormatter = [[[NSDateFormatter alloc] init] autorelease];
        [dateFormatter setDateStyle:NSDateFormatterShortStyle];
        [dateFormatter setTimeStyle:NSDateFormatterShortStyle];
        statusLabel.text = [NSString stringWithFormat:@"Last update: %@",
                            [dateFormatter stringFromDate:[NSDate date]]];
    }
}

-(void)setBrowsing:(BOOL)b
{
    if ( browsing == b )
        return;
    browsing = b;

    if ( browsing )
    {
        [serverBrowser searchForServicesOfType:@"_p4._tcp" inDomain:@"local"];
    }
    else
    {
        [serverBrowser stop];
        NSArray * array = [NSArray arrayWithArray:foundServers];
        for ( P4Server * s in array )
            [self removeServer:s];
        [_tableView reloadData];
    }
}

-(void)observeValueForKeyPath:(NSString *)key
                     ofObject:(id)object
                       change:(NSDictionary *)dict
                      context:(void *)context
{
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    if ( object == defaults )
    {
        if ( [key isEqualToString:kServerDiscoveryPreferenceKey] )
        {
            self.browsing = [defaults boolForKey:kServerDiscoveryPreferenceKey];
        }
        else if ( [key isEqualToString:kDefaultUserPreferenceKey] )
        {
            [self refresh:self];
        }
    }

    if ( [key isEqualToString:ActivePropertyKey] )
    {
        BOOL isActive = [[dict objectForKey:NSKeyValueChangeNewKey] boolValue];
        if ( isActive )
            [self addActiveServer:object];
        else
            [self removeActiveServer:object];
    }

    if ( [key isEqualToString:ReachablePropertyKey] )
    {
        [self updateRefreshButton];
    }

    UITableViewCell *cell = [self visibleCellForServer:object];
    if ( cell )
        [self configureCell:cell withServer:object];
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return [[self serverListForSection:section] count];
}

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
    if ( foundServers.count == 0 )
        return nil;

    switch (section) {
        case SavedServers:
            return @"Saved";
            break;
        case FoundServers:
            return @"Discovered";
            break;
        default:
            NSAssert( false, @"Should never hit default condition" );
            return nil;
            break;
    };
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    
    NSAssert ( indexPath.section < NumberOfSections, @"More sections than defined" );

    static NSString *CellIdentifier = @"ServerTableCell";
    ServerTableCell *cell = (ServerTableCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        NSArray * a = [[NSBundle mainBundle] loadNibNamed:@"ServerTableViewCell" owner:self options:nil];
        cell = (ServerTableCell *)[a lastObject];
    }

    if (cell == nil) {
        CGRect frame = CGRectMake(0, 0, 300, 44);
        cell = [[[UITableViewCell alloc] initWithFrame:frame
                                       reuseIdentifier:CellIdentifier] autorelease];
        cell.imageView.image  = [UIImage imageNamed:@"StatusUnreachable.png"];
        cell.showsReorderControl = true;
        UIActivityIndicatorView * av = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
        av.tag = CellActivityViewTag;
        av.hidesWhenStopped;
        [cell.contentView addSubview:av];
        av.hidden = true;
        [av release];
    }
    
    // Configure the cell
    P4Server * s = [self serverForIndexPath:indexPath];
    
    [self configureCell:cell withServer:s];
    return cell;
}


- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
    if (self.editing)
        return;

    ServerDetailViewController * detail = [[ServerDetailViewController alloc] initWithNibName:@"ServerDetail" bundle:nil];
    
    detail.server = [self serverForIndexPath:indexPath];

    [self.navigationController pushViewController:detail animated:YES];
    [detail release];
}


- (BOOL)tableView:(UITableView*)tableView
canEditRowAtIndexPath:(NSIndexPath*)indexPath
{
    return ( indexPath.section == SavedServers );
}


- (void)tableView:(UITableView *)tableView
commitEditingStyle:(UITableViewCellEditingStyle)editingStyle
forRowAtIndexPath:(NSIndexPath *)indexPath
{
    if ( editingStyle != UITableViewCellEditingStyleDelete )
        return;

    if ( indexPath.section != SavedServers )
        return;
    
    [self removeServer:[_servers objectAtIndex:indexPath.row]];
}

/*
- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
}
*/
/*
- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
}
*/
/*
- (void)viewWillDisappear:(BOOL)animated {
}
*/
/*
- (void)viewDidDisappear:(BOOL)animated {
}
*/
/*
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
}
*/
#pragma mark -
#pragma mark actions

-(IBAction)cancel:(id)sender
{
    [self.navigationController dismissModalViewControllerAnimated:YES];
    [self setEditing:NO animated:YES];
}


- (IBAction)save:(id)sender
{
    [self.navigationController dismissModalViewControllerAnimated:YES];

    if (connectionEditorController.isNewServer)
    {
        [connectionEditorController.server refresh:self];
        [self addServer:connectionEditorController.server];
    }

    // Dismiss the modal view to return to the main list
    [self setEditing:NO animated:YES];
}

-(int)reachableServerCount
{
    int serverCount = 0;

    for ( P4Server * s in _servers )
        if (s.reachable) serverCount++;
    for ( P4Server * s in foundServers )
        if (s.reachable) serverCount++;

    return serverCount;
}

-(void)updateRefreshButton
{
    self.refreshButton.enabled = ([self reachableServerCount] > 0);
}


-(IBAction)refresh:(id)sender
{
    for ( P4Server * s in _servers )
        [s refresh:self];

    for ( P4Server * s in foundServers )
        [s refresh:self];
}

-(IBAction)add:(id)sender
{
    connectionEditorController.server = [[[P4Server alloc] init] autorelease];
    connectionEditorController.title = @"New Server";
    connectionEditorController.isNewServer = true;
    [self.navigationController presentModalViewController:serverAddDialogController animated:YES];
}



@end