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//

//  EditPermissionsViewController.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 "EditPermissionsViewController.h"

#import "AccountManager.h"

#import "UIViewController+Conveniences.h"

#import "FolderViewController.h"

#import "Folder.h"

#import "PithosUtilities.h"

#import "APICallback.h"

#define kUser 0

#define kPermissions 1

#define kSavePermissions 2

#define kRemovePermissions 3

@implementation EditPermissionsViewController

@synthesize account, container, object;

@synthesize user, readPermissionSelected, writePermissionSelected, permissions;

@synthesize oldPermissionsString;

@synthesize newPermissionsEntry, removePermissionsEnabled;

@synthesize folderViewController, objectIsFolder;

- (void)dealloc

{

    [account release];

    [container release];

    [object release];

    [user release];

    [permissions release];

    [oldPermissionsString release];

    [activityIndicatorView 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

{

    if (removePermissionsEnabled)

        return 4;

    else 

        return 3;

}

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

{

    if (section == kPermissions)

        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 == kUser) {

        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.placeholder = @"User or User:Group";

        textField.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;

        textField.text = self.user;

        cell.selectionStyle = UITableViewCellSelectionStyleNone;

        [cell.contentView addSubview:textField];

        cell.selectionStyle = UITableViewCellSelectionStyleNone;

    }

    else if (indexPath.section == kPermissions) {

        cell.selectionStyle = UITableViewCellSelectionStyleNone;

        if (indexPath.row == 0) {

            cell.textLabel.text = @"Read Only";

            if (readPermissionSelected)

                cell.accessoryType = UITableViewCellAccessoryCheckmark;

            else

                cell.accessoryType = UITableViewCellAccessoryNone;

        }

        else {

            cell.textLabel.text = @"Read/Write";

            if (writePermissionSelected)

                cell.accessoryType = UITableViewCellAccessoryCheckmark;

            else

                cell.accessoryType = UITableViewCellAccessoryNone;

        }

    } 

    else if (indexPath.section == kSavePermissions) {

        cell.textLabel.text = @"Save";

        cell.accessoryType = UITableViewCellAccessoryNone;

        cell.selectionStyle = UITableViewCellSelectionStyleBlue;

    }

    else if (indexPath.section == kRemovePermissions) {

        cell.textLabel.text = @"Remove";

        cell.accessoryType = UITableViewCellAccessoryNone;

        cell.selectionStyle = UITableViewCellSelectionStyleBlue;

    }

    return cell;

}

#pragma mark - Table view delegate

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

{    

    if (indexPath.section != kUser)

        [self.view endEditing:YES];

    NSString *newUserName;

    NSIndexPath *userCellIndexPath = [NSIndexPath indexPathForRow:0 inSection:kUser];

    UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:userCellIndexPath];

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

    newUserName = textField.text;

    if (![self userInputIsValid:newUserName]) {

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

        return;

    }

    if (indexPath.section == kPermissions) {

        UITableViewCell *readPermissionsCell = [self.tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:kPermissions]];

        UITableViewCell *writePermissionsCell = [self.tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:1 inSection:kPermissions]];

        if (indexPath.row == 0) {

            if (!readPermissionSelected) {

                readPermissionSelected = YES;

                if (writePermissionSelected) {

                    writePermissionSelected = FALSE;

                    writePermissionsCell.accessoryType = UITableViewCellAccessoryNone;

                }

                readPermissionsCell.accessoryType = UITableViewCellAccessoryCheckmark;

            }

        }

        else if (indexPath.row == 1) {

            if (!writePermissionSelected) {

                writePermissionSelected = YES;

                if (readPermissionSelected) {

                    readPermissionSelected = FALSE;

                    readPermissionsCell.accessoryType = UITableViewCellAccessoryNone;

                }

                writePermissionsCell.accessoryType = UITableViewCellAccessoryCheckmark;

            }

        }

    }

    else if (indexPath.section == kSavePermissions) {

        if (!readPermissionSelected && !writePermissionSelected) {

            [self alert:@"Cannot save permissions"  message:@"Please select permissions type"];

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

            return;

        }

        [self.permissions removeObjectForKey:self.user];

        if (readPermissionSelected) 

            [self.permissions setObject:@"read" forKey:newUserName];

        else if (writePermissionSelected)

            [self.permissions setObject:@"write" forKey:newUserName];

        self.user = newUserName;

        self.oldPermissionsString = object.sharing;

        object.sharing = [self buildPermissionsString];

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

            if (((UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) &&

                [folderViewController.parentFolderViewController.folder.objects objectForKey:object.name]) || 

                ((UI_USER_INTERFACE_IDIOM() != UIUserInterfaceIdiomPad) &&

                 [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];

                [alert release];

                return;

            } else {

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

                [activityIndicatorView release];

                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 createNewFolder];  

                return;

            }

        }

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

        [activityIndicatorView release];

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

        [activityIndicatorView addToView:self.view];

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

         success:^(OpenStackRequest *request) {

             [activityIndicatorView removeFromSuperview];

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

             removePermissionsEnabled = YES;

             [self.tableView reloadData];

             if (objectIsFolder || (account.shared && ![oldPermissionsString isEqualToString:object.sharing])) {

                 if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {

                     [self.folderViewController refreshButtonPressed:nil];

                 }

                 else {

                     self.folderViewController.needsRefreshing = YES;

                 }

             } 

         }

         failure:^(OpenStackRequest *request) {

             object.sharing = self.oldPermissionsString;

             readPermissionSelected = !readPermissionSelected;

             writePermissionSelected = !writePermissionSelected;

             if (readPermissionSelected)

                 [self.permissions setObject:@"read" forKey:user];

             else if (writePermissionSelected) 

                 [self.permissions setObject:@"write" forKey:user];

             [activityIndicatorView removeFromSuperview];

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

             [self.tableView reloadData];

             [self alert:@"There was a problem applying the permissions." request:request];

         }];

    } 

    else if (indexPath.section == kRemovePermissions) {

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

        [activityIndicatorView release];

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

        [activityIndicatorView addToView:self.view];

        [permissions removeObjectForKey:user];

        self.oldPermissionsString = object.sharing;

        object.sharing = [self buildPermissionsString];

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

         success:^(OpenStackRequest *request) {

             self.user = @"";

             self.readPermissionSelected = FALSE;

             self.writePermissionSelected = FALSE;

             removePermissionsEnabled = NO;

             [self.tableView reloadData];

             [activityIndicatorView removeFromSuperview];

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

             if (objectIsFolder || (account.shared && ![oldPermissionsString isEqualToString:object.sharing])) {

                 self.folderViewController.needsRefreshing = YES;

                 if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)

                     [self.folderViewController refreshButtonPressed:nil];

                 else

                     self.folderViewController.refreshWhenAppeared = YES;

             }

         }

         failure:^(OpenStackRequest *request) {

             object.sharing = self.oldPermissionsString;

             if (readPermissionSelected)

                 [self.permissions setObject:@"read" forKey:user];

             else if (writePermissionSelected) 

                 [self.permissions setObject:@"write" forKey:user];

             [activityIndicatorView removeFromSuperview];

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

             [self.tableView reloadData];

             [self alert:@"There was a problem removing the permissions." request:request];

         }];

    }

}

#pragma mark - Textfield delegate

- (BOOL)textFieldShouldReturn:(UITextField *)textField

{

    [self userInputIsValid:textField.text];

    [textField resignFirstResponder];

    return YES;

}

#pragma mark - Alertview delegate

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

{

    if (buttonIndex == 1) {

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

        [activityIndicatorView release];

        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 createNewFolder];

    } else {

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

    }

}

- (void)createNewFolder {

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

     success:^(OpenStackRequest *request) {

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

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

         newFolder.parent = folderViewController.folder;

         newFolder.sharing = folderViewController.folder.sharing;

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

         [activityIndicatorView removeFromSuperview];

         [newFolder release];

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

         removePermissionsEnabled = YES;

         [self.tableView reloadData];

         if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {

             [self.folderViewController refreshButtonPressed:nil];

         }

         else {

             self.folderViewController.needsRefreshing = YES;

             self.folderViewController.refreshWhenAppeared = YES;

         }            

     }

     failure:^(OpenStackRequest *request) {

         object.sharing = self.oldPermissionsString;

         readPermissionSelected = !readPermissionSelected;

         writePermissionSelected = !writePermissionSelected;

         if (readPermissionSelected)

             [self.permissions setObject:@"read" forKey:user];

         else if (writePermissionSelected) 

             [self.permissions setObject:@"write" forKey:user];

         [activityIndicatorView removeFromSuperview];

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

         [self.tableView reloadData];

         [self alert:@"There was a problem applying the permissions." request:request];                                    

     }];

}

#pragma mark - helper methods

- (NSString *)buildPermissionsString

{

    NSString *readPermissionsString = @"";

    NSString *writePermissionsString = @"";

    for (NSString *aUser in [permissions allKeys]) {

        if ([[permissions objectForKey:aUser] isEqual:@"read"]) {

            if ([readPermissionsString length] == 0)

                readPermissionsString = [NSString stringWithFormat:@"read=%@", aUser];

            else

                readPermissionsString = [NSString stringWithFormat:@"%@,%@", readPermissionsString ,aUser];

        }

        else if ([[permissions objectForKey:aUser] isEqual:@"write"]) {

            if ([writePermissionsString length] == 0)

                writePermissionsString = [NSString stringWithFormat:@"write=%@", aUser];

            else

                writePermissionsString = [NSString stringWithFormat:@"%@,%@", writePermissionsString, aUser];

        }

    }

    if ([writePermissionsString length] == 0)

        return readPermissionsString;

    else if ([readPermissionsString length] == 0)

        return writePermissionsString;

    else return [NSString stringWithFormat:@"%@;%@", readPermissionsString, writePermissionsString];

}

- (BOOL) userInputIsValid: (NSString *) input

{

    if ([input length] == 0

        || [[input stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] length] == 0

        ) {

        [self alert:@"Invalid input" message:@"User name cannot be empty"];

        return NO;

    }

    else {

        NSCharacterSet *set = [NSCharacterSet characterSetWithCharactersInString:@"=,;"];

        if ([input rangeOfCharacterFromSet:set].location != NSNotFound) {

            [self alert:@"Invalid input" message:@"User name cannot contain '=', ',' or ';'"];

            return NO;

        }

        else {

            return YES;

        }

    }

    return YES;

}

@end