/*

     File: CreateDirController.m

 Abstract: Manages the Create Dir tab.

  Version: 1.4

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 */

#import "CreateDirController.h"

#import "NetworkManager.h"

#include <CFNetwork/CFNetwork.h>

@interface CreateDirController () <UITextFieldDelegate, NSStreamDelegate>

// things for IB

@property (nonatomic, strong, readwrite) IBOutlet UITextField *               urlText;

@property (nonatomic, strong, readwrite) IBOutlet UITextField *               usernameText;

@property (nonatomic, strong, readwrite) IBOutlet UITextField *               passwordText;

@property (nonatomic, strong, readwrite) IBOutlet UITextField *               dirNameText;

@property (nonatomic, strong, readwrite) IBOutlet UILabel *                   statusLabel;

@property (nonatomic, strong, readwrite) IBOutlet UIActivityIndicatorView *   activityIndicator;

@property (nonatomic, strong, readwrite) IBOutlet UIBarButtonItem *           createOrCancelButton;

- (IBAction)createOrCancelAction:(id)sender;

// Properties that don't need to be seen by the outside world.

@property (nonatomic, assign, readonly ) BOOL              isCreating;

@property (nonatomic, strong, readwrite) NSOutputStream *  networkStream;

@end

@implementation CreateDirController

#pragma mark * Status management

// These methods are used by the core transfer code to update the UI.

- (void)createDidStart

{

    self.statusLabel.text = @"Creating";

    [self.activityIndicator startAnimating];

    [[NetworkManager sharedInstance] didStartNetworkOperation];

}

- (void)updateStatus:(NSString *)statusString

{

    assert(statusString != nil);

    self.statusLabel.text = statusString;

}

- (void)createDidStopWithStatus:(NSString *)statusString

{

    if (statusString == nil) {

        statusString = @"Create succeeded";

    }

    self.statusLabel.text = statusString;

    [self.activityIndicator stopAnimating];

    [[NetworkManager sharedInstance] didStopNetworkOperation];

}

#pragma mark * Core transfer code

// This is the code that actually does the networking.

- (BOOL)isCreating

{

    return (self.networkStream != nil);

}

- (void)startCreate

{

    BOOL                    success;

    NSURL *                 url;

    assert(self.networkStream == nil);      // don't tap create twice in a row!

    // First get and check the URL.

    url = [[NetworkManager sharedInstance] smartURLForString:self.urlText.text];

    success = (url != nil);

    if (success) {

        // Add the directory name to the end of the URL to form the final URL 

        // that we're going to create.  CFURLCreateCopyAppendingPathComponent will 

        // percent encode (as UTF-8) any wacking characters, which is the right thing 

        // to do in the absence of application-specific knowledge about the encoding 

        // expected by the server.

        url = CFBridgingRelease(

            CFURLCreateCopyAppendingPathComponent(NULL, (__bridge CFURLRef) url, (__bridge CFStringRef) self.dirNameText.text, true)

        );

        success = (url != nil);

    }

    // If the URL is bogus, let the user know.  Otherwise kick off the connection.

    if ( ! success) {

        self.statusLabel.text = @"Invalid URL";

    } else {

        // Open a CFFTPStream for the URL.

        self.networkStream = CFBridgingRelease( 

            CFWriteStreamCreateWithFTPURL(NULL, (__bridge CFURLRef) url) 

        );

        assert(self.networkStream != nil);

        if ([self.usernameText.text length] != 0) {

            success = [self.networkStream setProperty:self.usernameText.text forKey:(id)kCFStreamPropertyFTPUserName];

            assert(success);

            success = [self.networkStream setProperty:self.passwordText.text forKey:(id)kCFStreamPropertyFTPPassword];

            assert(success);

        }

        self.networkStream.delegate = self;

        [self.networkStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];

        [self.networkStream open];

        // Tell the UI we're creating.

        [self createDidStart];

    }

}

- (void)stopCreateWithStatus:(NSString *)statusString

{

    if (self.networkStream != nil) {

        [self.networkStream removeFromRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];

        self.networkStream.delegate = nil;

        [self.networkStream close];

        self.networkStream = nil;

    }

    [self createDidStopWithStatus:statusString];

}

- (void)stream:(NSStream *)aStream handleEvent:(NSStreamEvent)eventCode

    // An NSStream delegate callback that's called when events happen on our 

    // network stream.

{

    #pragma unused(aStream)

    assert(aStream == self.networkStream);

    switch (eventCode) {

        case NSStreamEventOpenCompleted: {

            [self updateStatus:@"Opened connection"];

            // Despite what it says in the documentation <rdar://problem/7163693>, 

            // you should wait for the NSStreamEventEndEncountered event to see 

            // if the directory was created successfully.  If you shut the stream 

            // down now, you miss any errors coming back from the server in response 

            // to the MKD command.

            //

            // [self stopCreateWithStatus:nil];

        } break;

        case NSStreamEventHasBytesAvailable: {

            assert(NO);     // should never happen for the output stream

        } break;

        case NSStreamEventHasSpaceAvailable: {

            assert(NO);

        } break;

        case NSStreamEventErrorOccurred: {

            CFStreamError   err;

            // -streamError does not return a useful error domain value, so we 

            // get the old school CFStreamError and check it.

            err = CFWriteStreamGetError( (__bridge CFWriteStreamRef) self.networkStream );

            if (err.domain == kCFStreamErrorDomainFTP) {

                [self stopCreateWithStatus:[NSString stringWithFormat:@"FTP error %d", (int) err.error]];

            } else {

                [self stopCreateWithStatus:@"Stream open error"];

            }

        } break;

        case NSStreamEventEndEncountered: {

            [self stopCreateWithStatus:nil];

        } break;

        default: {

            assert(NO);

        } break;

    }

}

#pragma mark * Actions

- (IBAction)createOrCancelAction:(id)sender

{

    #pragma unused(sender)

    if (self.isCreating) {

        [self stopCreateWithStatus:@"Cancelled"];

    } else {

        [self startCreate];

    }

}

- (void)textFieldDidEndEditing:(UITextField *)textField

    // A delegate method called by the URL text field when the editing is complete. 

    // We save the current value of the field in our settings.

{

    NSString *  defaultsKey;

    NSString *  newValue;

    NSString *  oldValue;

    if (textField == self.urlText) {

        defaultsKey = @"CreateDirURLText";

    } else if (textField == self.dirNameText) {

        defaultsKey = @"CreateDirNameText";

    } else if (textField == self.usernameText) {

        defaultsKey = @"Username";

    } else if (textField == self.passwordText) {

        defaultsKey = @"Password";

    } else {

        assert(NO);

        defaultsKey = nil;          // quieten warning

    }

    newValue = textField.text;

    oldValue = [[NSUserDefaults standardUserDefaults] stringForKey:defaultsKey];

    // Save the value if it's changed.

    assert(newValue != nil);        // what is UITextField thinking!?!

    assert(oldValue != nil);        // because we registered a default

    if ( ! [newValue isEqual:oldValue] ) {

        [[NSUserDefaults standardUserDefaults] setObject:newValue forKey:defaultsKey];

    }

}

- (BOOL)textFieldShouldReturn:(UITextField *)textField

    // A delegate method called by the URL text field when the user taps the Return 

    // key.  We just dismiss the keyboard.

{

    #pragma unused(textField)

    assert( (textField == self.urlText) || (textField == self.dirNameText) || (textField == self.usernameText) || (textField == self.passwordText) );

    [textField resignFirstResponder];

    return NO;

}

#pragma mark * View controller boilerplate

- (void)viewDidLoad

{

    [super viewDidLoad];

    assert(self.urlText != nil);

    assert(self.usernameText != nil);

    assert(self.passwordText != nil);

    assert(self.dirNameText != nil);

    assert(self.statusLabel != nil);

    assert(self.activityIndicator != nil);

    assert(self.createOrCancelButton != nil);

    self.createOrCancelButton.possibleTitles = [NSSet setWithObjects:@"Create", @"Cancel", nil];

    self.urlText.text = [[NSUserDefaults standardUserDefaults] stringForKey:@"CreateDirURLText"];

    self.dirNameText.text = [[NSUserDefaults standardUserDefaults] stringForKey:@"CreateDirNameText"];

    // The setup of usernameText and passwordText deferred to -viewWillAppear: 

    // because those values are shared by multiple tabs.

    self.activityIndicator.hidden = YES;

    self.statusLabel.text = @"Tap Create to create the directory";

}

- (void)viewWillAppear:(BOOL)animated

{

    [super viewWillAppear:animated];

    self.usernameText.text = [[NSUserDefaults standardUserDefaults] stringForKey:@"Username"];

    self.passwordText.text = [[NSUserDefaults standardUserDefaults] stringForKey:@"Password"];

}

- (void)viewDidUnload

{

    [super viewDidUnload];

    self.urlText = nil;

    self.usernameText = nil;

    self.passwordText = nil;

    self.dirNameText = nil;

    self.statusLabel = nil;

    self.activityIndicator = nil;

    self.createOrCancelButton = nil;

}

- (void)dealloc

{

    [self stopCreateWithStatus:@"Stopped"];

}

@end