Synnefo » Pithos iOS Client

//

//  EditMetadataViewController.m

//  pithos-ios

//

// Copyright 2011 GRNET S.A. All rights reserved.

//

// Redistribution and use in source and binary forms, with or

// without modification, are permitted provided that the following

// conditions are met:

// 

//   1. Redistributions of source code must retain the above

//      copyright notice, this list of conditions and the following

//      disclaimer.

// 

//   2. Redistributions in binary form must reproduce the above

//      copyright notice, this list of conditions and the following

//      disclaimer in the documentation and/or other materials

//      provided with the distribution.

// 

// THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

// OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

// USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

// POSSIBILITY OF SUCH DAMAGE.

// 

// The views and conclusions contained in the software and

// documentation are those of the authors and should not be

// interpreted as representing official policies, either expressed

// or implied, of GRNET S.A.

#import "EditMetadataViewController.h"

#import "AccountManager.h"

#import "UIViewController+Conveniences.h"

#import "FolderViewController.h"

#import "Folder.h"

#import "PithosUtilities.h"

@implementation EditMetadataViewController

@synthesize container, account, object;

@synthesize metadataKey;

@synthesize metadataValue;

@synthesize removeMetadataEnabled, objectIsFolder, folderViewController, objectIsContainer;

#define kMetadata 0 

#define kSaveMedata 1

#define kDeleteMetadata 2

- (void)dealloc

{

    [account release];

    [container release];

    [object release];

    [metadataKey release];

    [metadataValue release];

    [super dealloc];

}

- (void)didReceiveMemoryWarning

{

    // Releases the view if it doesn't have a superview.

    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc that aren't in use.

}

#pragma mark - View lifecycle

- (void)viewDidLoad

{

    [super viewDidLoad];

}

- (void)viewDidUnload

{

    [super viewDidUnload];

}

- (void)viewWillAppear:(BOOL)animated

{    

    [super viewWillAppear:animated];

}

- (void)viewDidAppear:(BOOL)animated

{

    [super viewDidAppear:animated];

}

- (void)viewWillDisappear:(BOOL)animated

{

    [super viewWillDisappear:animated];

}

- (void)viewDidDisappear:(BOOL)animated

{

    [super viewDidDisappear:animated];

}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation {

    return (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) || (toInterfaceOrientation == UIInterfaceOrientationPortrait);

}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView

{

    return (removeMetadataEnabled)? 3:2;

}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

{

    if (section == kMetadata)

        return 2;

    else

        return 1;

}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

{

    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    if (cell == nil) {

        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];

    }

    if (indexPath.section == kMetadata) {

        UITextField *textField = nil;

        for (id subView in cell.contentView.subviews) {

            if ([subView isKindOfClass:[UITextField class]]) {

                textField = (UITextField *)subView;

            }

        }

        if (textField == nil) {

            CGRect bounds = [cell.contentView bounds];

            CGRect rect = CGRectInset(bounds, 10.0, 10.0);                        

            textField = [[UITextField alloc] initWithFrame:rect];

            [textField setFrame:rect];

        }

        [textField setClearButtonMode:UITextFieldViewModeWhileEditing];

        [textField setBackgroundColor:[UIColor clearColor]];

        [textField setOpaque:YES];

        [textField setAutocorrectionType:UITextAutocorrectionTypeNo];

        [textField setAutocapitalizationType:UITextAutocapitalizationTypeNone];

        [textField setDelegate:self];

        textField.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;

        if (indexPath.row == 0) {

            [textField setReturnKeyType:UIReturnKeyNext];

            textField.placeholder = @"Key";

            textField.text = self.metadataKey;

            textField.tag = 0;

        }

        else if (indexPath.row == 1) {

            textField.placeholder = @"Value";

            textField.text = self.metadataValue;

            textField.tag = 1;

        }

        cell.selectionStyle = UITableViewCellSelectionStyleNone;

        [cell.contentView addSubview:textField];

    }

    else if (indexPath.section == kSaveMedata) 

        cell.textLabel.text = @"Save";

    else if (indexPath.section == kDeleteMetadata)

        cell.textLabel.text = @"Remove";

    return cell;

}

#pragma mark - Table view delegate

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath

{

    if (indexPath.section != kMetadata)

        [self.view endEditing:YES];

    NSString *activityMessage;

    NSIndexPath *keyCellIndexPath;

    NSIndexPath *valueCellIndexPath;

    UITableViewCell *cell;

    switch (indexPath.section) {

        case kSaveMedata:

            keyCellIndexPath = [NSIndexPath indexPathForRow:0 inSection:kMetadata];

            cell = [self.tableView cellForRowAtIndexPath:keyCellIndexPath];

            UITextField *textField = [[cell.contentView subviews] objectAtIndex:0];

            newMetadataKey = textField.text;

            if ([newMetadataKey length] == 0

                || [[newMetadataKey stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] length] == 0) {

                [self.tableView deselectRowAtIndexPath:indexPath animated:YES];

                [self alert:@"Invalid input" message:@"Metadata key cannot be empty"];

                return;

            }

            valueCellIndexPath = [NSIndexPath indexPathForRow:1 inSection:kMetadata];

            cell = [self.tableView cellForRowAtIndexPath:valueCellIndexPath];

            textField = [[cell.contentView subviews] objectAtIndex:0];

            newMetadataValue = textField.text;

            [object.metadata removeObjectForKey:metadataKey];

            [object.metadata setObject:newMetadataValue forKey:newMetadataKey];

            if (objectIsFolder && ![PithosUtilities isContentTypeDirectory:object.contentType]) {

                if ([folderViewController.folder.objects objectForKey:object.name]) {

                    NSString *alertMessage = [NSString stringWithFormat:@"In order to apply the changes in '%@', the object at the same path must be replaced. Continue?",object.name];

                    NSString *alertTitle = @"Apply changes";

                    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:alertTitle

                                                                    message:alertMessage

                                                                   delegate:self

                                                          cancelButtonTitle:@"Cancel"

                                                          otherButtonTitles:@"OK", nil];

                    [alert show];

                    return;

                } else {

                    activityMessage = @"Saving metadata...";

                    activityIndicatorView = [[ActivityIndicatorView alloc] initWithFrame:[ActivityIndicatorView frameForText:activityMessage] text:activityMessage];

                    [activityIndicatorView addToView:self.view];

                    object.name = object.fullPath;

                    object.contentType = @"application/directory";

                    object.data = [NSData data];

                    [self addNewFolderRequestObservers];

                    [self.account.manager writeObject:self.container object:object downloadProgressDelegate:nil];  

                    return;

                }

            }

            activityMessage = @"Saving metadata";

            activityIndicatorView = [[ActivityIndicatorView alloc] initWithFrame:[ActivityIndicatorView frameForText:activityMessage] text:activityMessage];

            [activityIndicatorView addToView:self.view];

            [self.account.manager writeObjectMetadata:container object:object];

            successObserver = [[NSNotificationCenter defaultCenter] addObserverForName:@"writeObjectMetadataSucceeded"

                                                                                object:object

                                                                                 queue:[NSOperationQueue mainQueue]

                                                                            usingBlock:^(NSNotification *notification)

                               {

                                   self.metadataKey = newMetadataKey;

                                   self.metadataValue = newMetadataValue;

                                   removeMetadataEnabled = YES;

                                   [self.tableView reloadData];

                                   [activityIndicatorView removeFromSuperviewAndRelease];

                                   [self.tableView deselectRowAtIndexPath:indexPath animated:YES];

                                   if (objectIsContainer) {

                                       container.metadata = object.metadata;

                                       [self.account.containers setObject:container forKey:container.name];

                                   }

                                   [[NSNotificationCenter defaultCenter] removeObserver:successObserver];

                               }];

            failureObserver = [[NSNotificationCenter defaultCenter] addObserverForName:@"writeObjectMetadataFailed" 

                                                                                object:object 

                                                                                 queue:[NSOperationQueue mainQueue] 

                                                                            usingBlock:^(NSNotification *notification)

                               {

                                   [object.metadata removeObjectForKey:newMetadataKey];

                                   [object.metadata setObject:metadataValue forKey:metadataKey];

                                   [activityIndicatorView removeFromSuperviewAndRelease];

                                   [self.tableView deselectRowAtIndexPath:indexPath animated:YES];

                                   [self alert:@"There was a problem saving the metadata." request:[notification.userInfo objectForKey:@"request"]];

                                   [[NSNotificationCenter defaultCenter] removeObserver:failureObserver];

                               }];

            break;

        case kDeleteMetadata:

            activityMessage = @"Deleting metadata";

            activityIndicatorView = [[ActivityIndicatorView alloc] initWithFrame:[ActivityIndicatorView frameForText:activityMessage] text:activityMessage];

            [activityIndicatorView addToView:self.view];

            [object.metadata removeObjectForKey:metadataKey];

            [self.account.manager writeObjectMetadata:container object:object];

            successObserver = [[NSNotificationCenter defaultCenter] addObserverForName:@"writeObjectMetadataSucceeded"

                                                                                object:object

                                                                                 queue:[NSOperationQueue mainQueue]

                                                                            usingBlock:^(NSNotification *notification)

                               {

                                   [activityIndicatorView removeFromSuperviewAndRelease];

                                   [self.tableView deselectRowAtIndexPath:indexPath animated:YES];

                                   self.metadataKey = @"";

                                   self.metadataValue = @"";

                                   removeMetadataEnabled = NO;

                                   [self.tableView reloadData];

                                   if (objectIsContainer) {

                                       container.metadata = object.metadata;

                                       [self.account.containers setObject:container forKey:container.name];

                                   }

                                   [[NSNotificationCenter defaultCenter] removeObserver:successObserver];

                               }];

            failureObserver = [[NSNotificationCenter defaultCenter] addObserverForName:@"writeObjectMetadataFailed" 

                                                                                object:object 

                                                                                 queue:[NSOperationQueue mainQueue] 

                                                                            usingBlock:^(NSNotification *notification)

                               {

                                   [object.metadata setObject:metadataValue forKey:metadataKey];

                                   [activityIndicatorView removeFromSuperviewAndRelease];

                                   [self.tableView deselectRowAtIndexPath:indexPath animated:YES];

                                   [self alert:@"There was a problem saving the metadata." request:[notification.userInfo objectForKey:@"request"]];

                                   [[NSNotificationCenter defaultCenter] removeObserver:failureObserver];

                               }];

            break;

    }

}

#pragma mark - Alertview delegate

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex

{

    if (buttonIndex == 1) {

        NSString *activityMessage = @"Applying permissions...";

        activityIndicatorView = [[ActivityIndicatorView alloc] initWithFrame:[ActivityIndicatorView frameForText:activityMessage] text:activityMessage];

        [activityIndicatorView addToView:self.view];

        object.name = object.fullPath;

        object.contentType = @"application/directory";

        object.data = [NSData data];

        [self addNewFolderRequestObservers];

        [self.account.manager writeObject:self.container object:object downloadProgressDelegate:nil];        

    } else {

        [self.tableView deselectRowAtIndexPath:[self.tableView indexPathForSelectedRow] animated:YES];

    }

}

#pragma mark - Textfield delegate

- (BOOL)textFieldShouldReturn:(UITextField *)textField

{

    if ([textField returnKeyType] == UIReturnKeyNext)

    {

        if ([textField.text length] == 0

            || [[textField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] length] == 0) {

            [self alert:@"Invalid input" message:@"Metadata key cannot be empty"];

        }

        NSInteger nextTag = [textField tag] + 1;

        UIView *nextTextField = [self.tableView viewWithTag:nextTag];

        [nextTextField becomeFirstResponder];

    }

    else

    {

        [textField resignFirstResponder];

    }

    return YES;

}

#pragma mark - add observers

- (void)addNewFolderRequestObservers {

    addFolderSuccessObserver = [[NSNotificationCenter defaultCenter] addObserverForName:@"writeObjectSucceeded" object:object 

                                                                                  queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification *notification)

                                {

                                    Folder *newFolder = [[Folder alloc] init];

                                    newFolder.name = [[object.name componentsSeparatedByString:@"/"] lastObject];

                                    newFolder.parent = folderViewController.folder;

                                    newFolder.sharing = folderViewController.folder.sharing;

                                    newFolder.metadata = object.metadata;

                                    [folderViewController.folder.folders setObject:newFolder forKey:newFolder.name];

                                    [activityIndicatorView removeFromSuperviewAndRelease];

                                    [newFolder release];

                                    self.metadataKey = newMetadataKey;

                                    self.metadataValue = newMetadataValue;

                                    removeMetadataEnabled = YES;

                                    [self.tableView reloadData];

                                    [self.tableView deselectRowAtIndexPath:[self.tableView indexPathForSelectedRow] animated:YES];

                                    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {

                                        [self.folderViewController refreshButtonPressed:nil];

                                    }

                                    else {

                                        self.folderViewController.needsRefreshing = YES;

                                    }

                                    [[NSNotificationCenter defaultCenter] removeObserver:addFolderSuccessObserver];

                                }];

    addFolderFailureObserver = [[NSNotificationCenter defaultCenter] addObserverForName:@"writeObjectFailed" object:object 

                                                                                  queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification *notification)

                                {         

                                    [object.metadata removeObjectForKey:newMetadataKey];

                                    [object.metadata setObject:metadataValue forKey:metadataKey];

                                    [activityIndicatorView removeFromSuperviewAndRelease];

                                    [self.tableView deselectRowAtIndexPath:[self.tableView indexPathForSelectedRow] animated:YES];

                                    [self.tableView reloadData];

                                    [self alert:@"There was a problem saving the metadata." request:[notification.userInfo objectForKey:@"request"]];

                                    [[NSNotificationCenter defaultCenter] removeObserver:addFolderFailureObserver];

                                }];

}

@end