ePubreader

#import "EpubReaderViewController.h"


@implementation EpubReaderViewController
@synthesize _ePubContent;
@synthesize _rootPath;
@synthesize _strFileName;


- (void)viewDidLoad
{
    [super viewDidLoad];
    [self setBackButton];
    [_webview setBackgroundColor:[UIColor clearColor]];
    //First unzip the epub file to documents directory
    [self unzipAndSaveFile];
    _xmlHandler=[[XMLHandler alloc] init];
    _xmlHandler.delegate=self;
    [_xmlHandler parseXMLFileAt:[self getRootFilePath]];
}

/*Function Name : setTitlename
 *Return Type   : void
 *Parameters    : NSString- Text to set as title
 *Purpose       : To set the title for the view
 */

- (void)setTitlename:(NSString*)titleText
{
    NSLog(@"%@",titleText);
    // this will appear as the title in the navigation bar
    //CGRect frame = CGRectMake(0, 0, 200, 44);
    CGRect frame = CGRectMake(0, 0, 300, 44);
    UILabel *label = [[[UILabel alloc] initWithFrame:frame] autorelease];
    label.backgroundColor = [UIColor clearColor];
    //label.font = [UIFont boldSystemFontOfSize:17.0];
    //label.font=[UIFont systemFontOfSize:17.0];
    label.shadowColor = [UIColor colorWithWhite:0.0 alpha:0.5];
    label.textAlignment = UITextAlignmentCenter;
    label.numberOfLines=0;
    label.textColor=[UIColor whiteColor];
    self.navigationItem.titleView = label;
    label.text=titleText;
}

- (void)viewWillAppear:(BOOL)animated
{

    [self performSelector:@selector(setBackButton)
               withObject:nil
               afterDelay:0.1];
}

/*Function Name : setBackButton
 *Return Type   : void
 *Parameters    : nil
 *Purpose       : To set the back navigation button
 */

-(void)setBackButton
{

    UIBarButtonItem *objBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarButtonItemStyleBordered target:self action:@selector(onBack:)];
    self.navigationItem.leftBarButtonItem= objBarButtonItem;
    [objBarButtonItem release];

}

/*Function Name : unzipAndSaveFile
 *Return Type   : void
 *Parameters    : nil
 *Purpose       : To unzip the epub file to documents directory
*/

- (void)unzipAndSaveFile
{

    UKFightLabAppDelegate *appdelegate = ( UKFightLabAppDelegate *)[[UIApplication sharedApplication]delegate];

    ZipArchive* za = [[ZipArchive alloc] init];
    if( [za UnzipOpenFile:[[NSBundle mainBundle] pathForResource:appdelegate.topic ofType:@"epub"]] )
    {
        NSLog(@"%@",appdelegate.topic);

        NSString *strPath=[NSString stringWithFormat:@"%@/UnzippedEpub",[self applicationDocumentsDirectory]];
        //Delete all the previous files
        NSFileManager *filemanager=[[NSFileManager alloc] init];

        if ([filemanager fileExistsAtPath:strPath])
            {

                NSError *error;
                [filemanager removeItemAtPath:strPath error:&error];
            }
        [filemanager release];
        filemanager=nil;

        //start unzip
        BOOL ret = [za UnzipFileTo:[NSString stringWithFormat:@"%@/",strPath] overWrite:YES];
        if( NO==ret )
        {
            // error handler here
            UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"Error"
                                                          message:@"An unknown error occured"
                                                         delegate:self
                                                cancelButtonTitle:@"OK"
                                                otherButtonTitles:nil];
            [alert show];
            [alert release];
            alert=nil;
        }
        [za UnzipCloseFile];
    }
    [za release];
}

/*Function Name : applicationDocumentsDirectory
 *Return Type   : NSString - Returns the path to documents directory
 *Parameters    : nil
 *Purpose       : To find the path to documents directory
 */

- (NSString *)applicationDocumentsDirectory
{

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;
    return basePath;
}

/*Function Name : getRootFilePath
 *Return Type   : NSString - Returns the path to container.xml
 *Parameters    : nil
 *Purpose       : To find the path to container.xml.This file contains the file name which holds the epub informations
 */

- (NSString*)getRootFilePath{

    //check whether root file path exists
    NSFileManager *filemanager=[[NSFileManager alloc] init];
    NSString *strFilePath=[NSString stringWithFormat:@"%@/UnzippedEpub/META-INF/container.xml",[self applicationDocumentsDirectory]];
    if ([filemanager fileExistsAtPath:strFilePath]) {

        //valid ePub
        //NSLog(@"Parse now");

        [filemanager release];
        filemanager=nil;

        return strFilePath;
    }
    else {

        //Invalid ePub file
        UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"Error"
                                                      message:@"Root File not Valid"
                                                     delegate:self
                                            cancelButtonTitle:@"OK"
                                            otherButtonTitles:nil];
        [alert show];
        [alert release];
        alert=nil;

    }
    [filemanager release];
    filemanager=nil;
    return @"";
}


#pragma mark XMLHandler Delegate Methods

- (void)foundRootPath:(NSString*)rootPath{

    //Found the path of *.opf file

    //get the full path of opf file
    NSString *strOpfFilePath=[NSString stringWithFormat:@"%@/UnzippedEpub/%@",[self applicationDocumentsDirectory],rootPath];
    NSFileManager *filemanager=[[NSFileManager alloc] init];

    self._rootPath=[strOpfFilePath stringByReplacingOccurrencesOfString:[strOpfFilePath lastPathComponent] withString:@""];

    if ([filemanager fileExistsAtPath:strOpfFilePath]) {

        //Now start parse this file
        [_xmlHandler parseXMLFileAt:strOpfFilePath];
    }
    else {

        UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"Error"
                                                      message:@"OPF File not found"
                                                     delegate:self
                                            cancelButtonTitle:@"OK"
                                            otherButtonTitles:nil];
        [alert show];
        [alert release];
        alert=nil;
    }
    [filemanager release];
    filemanager=nil;

}


- (void)finishedParsing:(EpubContent*)ePubContents
{

    //NSLog(@"Root Path---->%@",ePubContents._manifest);
    _pagesPath=[NSString stringWithFormat:@"%@%@",self._rootPath,[ePubContents._manifest valueForKey:[ePubContents._spine objectAtIndex:0]]];
    self._ePubContent=ePubContents;
    _pageNumber=0;                              //
    [self loadPage];
}

#pragma mark Button Actions

- (IBAction)onPreviousOrNext:(id)sender{


    UIBarButtonItem *btnClicked=(UIBarButtonItem*)sender;
    if (btnClicked.tag==0) {

        if (_pageNumber>0) {                        //

            _pageNumber--;
            [self loadPage];
        }
    }
    else {

        if ([self._ePubContent._spine count]-1>_pageNumber) {

            _pageNumber++;
            [self loadPage];
        }
    }
}

- (IBAction)onBack:(id)sender
{

    [self.navigationController popViewControllerAnimated:YES];
}

/*Function Name : loadPage
 *Return Type   : void
 *Parameters    : nil
 *Purpose       : To load actual pages to webview
 */

- (void)loadPage
{

    _pagesPath=[NSString stringWithFormat:@"%@%@",self._rootPath,[self._ePubContent._manifest valueForKey:[self._ePubContent._spine objectAtIndex:_pageNumber]]];
    NSLog(@"Path--->%@",_pagesPath);

    ///-----------R&D---------------

   // NSString *html =[NSString stringWithFormat:@"<html><body> <p align='center'><FONT SIZE=5 color='#000000'>%@</FONT></p></body></html>",_pagesPath];
   // NSLog(@"String----->>%@",html);



   // [_webview loadHTMLString:html baseURL:[NSURL URLWithString:@"http://www.hitchhiker.com/message"]];

    //---------------------

    [_webview loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:_pagesPath]]];
    //set page number

    _pageNumberLbl.text=[NSString stringWithFormat:@"%d",_pageNumber+1];
}

#pragma mark Memory handlers

- (void)didReceiveMemoryWarning {

    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];
}

- (void)viewDidUnload
{

}


- (void)dealloc {

    [_webview release];
    _webview=nil;

    [_ePubContent release];
    _ePubContent=nil;

    _pagesPath=nil;
    _rootPath=nil;

    [_strFileName release];
    _strFileName=nil;

    [_backGroundImage release];
    _backGroundImage=nil;

    [super dealloc];
}

@end