#import "objc/objc-class.h"
 
// Iterate over the class and all superclasses
Class currentClass = [RWPage class];
while (currentClass) {
    // Iterate over all instance methods for this class
    unsigned int methodCount;
    Method *methodList = class_copyMethodList(currentClass, &methodCount);
    unsigned int i = 0;
    for (; i < methodCount; i++) {
        NSLog(@"%@ - %@", [NSString stringWithCString:class_getName(currentClass) encoding:NSUTF8StringEncoding], [NSString stringWithCString:sel_getName(method_getName(methodList[i])) encoding:NSUTF8StringEncoding]);
    }
 
    free(methodList);
    currentClass = class_getSuperclass(currentClass);
}

+ (SSlidebraryItem *) loadFromPath:(NSString *)path error:(NSError **)error {
    // 1) check the path - if it's incorrect create an NSError object and populate it.
    if (![[path pathExtension] isEqualToString:[SSlidebraryItem fileExtension]]) {
        // Unacceptable extension!
        // Populate our error variable
        // I've used a convention outlined here: http://stackoverflow.com/a/3276356/187954
        // Notice that userInfo is human-readable. This is the string that we can use to inform our user of the error
        *error = [NSError errorWithDomain:@"com.codeofinterest.Slider2" 
                                     code:100 
                                 userInfo:[NSDictionary dictionaryWithObject:[NSString stringWithFormat:@"Passed an invalid file format \"%@\" at \"%@\"", [path pathExtension], path]  forKey:NSLocalizedDescriptionKey]];
        return nil; // Caller should be checking that the error object is nil, and reacting appropriately
    }
 
    // File extension was acceptable - attempt to read the data from the file
    // We pass the error object to -initWithContentsOfFile
    NSData *encodedSettings = [[NSData alloc] initWithContentsOfFile:path options:NSDataReadingUncached error:error];
 
    // If something went wrong, return nil. 
    // The error object will have been populated by -initWithContentsOfFile
    if (*error != nil) {
        return nil;
    }
 
   // Have to use a try ... catch block here because +unarchiveObjectWithData raises an      
   // NSInvalidArchiveOperationException if data is not a valid archive, instead of returning nil and 
   // populating an error object
    @try {
 
        SSlidebraryItem *loadedSlidebraryItem = [NSKeyedUnarchiver unarchiveObjectWithData:encodedSettings];
 
        // No data! This shouldn't happen... 
        if (!loadedSlidebraryItem) {
            // Populate the error object with details of what happened
            *error = [NSError errorWithDomain:@"com.codeofinterest.Slider2" code:101 userInfo:[NSDictionary dictionaryWithObject:[NSString stringWithFormat:@"Failed to load slidebrary item from \"%@\"", path] forKey:NSLocalizedDescriptionKey]];
            return nil;
        }
        // Everything went well, return the loaded, unarchived object!
        return loadedSlidebraryItem;
    }
    @catch (NSException *exception) {
        // An exception occurred! This calls for another error message.
        *error = [NSError errorWithDomain:@"com.codeofinterest.Slider2" code:102 userInfo:[NSDictionary dictionaryWithObject:[NSString stringWithFormat:@"Failed to unarchive slidebrary item \"%@\"", path] forKey:NSLocalizedDescriptionKey]]; 
        // Also log the exception, so if a user emails you asking why their Slidebrary item won't load, you can 
        // ask them to run Rapid Weaver in a terminal and copy - paste any error output to aid your debugging!
        // I like to use the logging extension described here: http://pagesofinterest.net/blog/2011/09/more-informative-nslog-alternative/
        SLog(@"%@", exception);
        return nil;
    }
}

- (SSlidebraryItem *) loadSelectedSlidebraryItem {
    // Prepare the path for the Slidebrary item the user has selected
    NSDictionary *selectedSlidebraryItem = [[slidersController arrangedObjects] objectAtIndex:[table selectedRow]];
    NSString *path = [[SSlidebraryController slidebraryDirectory] stringByAppendingPathComponent:[selectedSlidebraryItem objectForKey:key_si_filename]];
 
    NSError *loadError = nil; // Prepare our error object
 
    SSlidebraryItem *settings = [SSlidebraryItem loadFromPath:path error:&loadError];
 
    // There was a problem loading the file
    if (loadError != nil) {
        // I like to slide a modal dialog out informing the user of the error as 
        // it makes it impossible to ignore and  easy for them to copy-paste or
        // grab a screenshot & email me the details
 
        [SModalSheetDialogs showModalMessage:@"An error occurred" 
                         withInformativeText:[loadError localizedDescription] 
                                   withStyle:NSWarningAlertStyle
                                  fromSender:self];
        return nil;
    } 
 
    // Success - return the loaded object
    return settings;
}

//
//  SModalSheetDialogs.h
//
//  Created by Michael Robinson on 7/08/11.
//  Copyright 2011 Code of Interest. All rights reserved.
//
#import <Foundation/Foundation.h>
 
@interface SModalSheetDialogs : NSObject
 
+ (void) showModalMessage:(NSString *)message withInformativeText:(NSString *)informativeText 
                withStyle:(NSAlertStyle)style fromSender:(id)sender;
 
+ (void) showModalRequest:(NSString *)message withInformativeText:(NSString *)informativeText 
                withStyle:(NSAlertStyle)style andButtons:(NSArray *)buttons 
           andContextInfo:(void *)contextInfo fromSender:(id)sender;
 
@end

//
//  SModalSheetDialogs.m
//{filelink=1}
//  Created by Michael Robinson on 7/08/11.
//  Copyright 2011 Code of Interest. All rights reserved.
//
 
#import "SModalSheetDialogs.h"
 
@implementation SModalSheetDialogs
 
+ (void) showModalMessage:(NSString *)message withInformativeText:(NSString *)informativeText 
                withStyle:(NSAlertStyle)style fromSender:(id)sender {
 
    NSAlert *alert = [[[NSAlert alloc] init] autorelease];
 
    [alert addButtonWithTitle:@"OK"];
 
    [alert setInformativeText:informativeText];
    [alert setMessageText:message];
 
    [alert setAlertStyle:style];
 
    [alert beginSheetModalForWindow:[NSApp mainWindow] 
                      modalDelegate:sender 
                     didEndSelector:@selector(alertDidEnd:returnCode:contextInfo:) 
                        contextInfo:nil];
}
 
+ (void) showModalRequest:(NSString *)message withInformativeText:(NSString *)informativeText 
                withStyle:(NSAlertStyle)style andButtons:(NSArray *)buttons 
           andContextInfo:(void *)contextInfo fromSender:(id)sender {
 
    NSAlert *alert = [[[NSAlert alloc] init] autorelease];
 
    NSEnumerator *e = [buttons objectEnumerator];
    id object;
    while (object = [e nextObject]) {
        [alert addButtonWithTitle:(NSString*)object];
    }
 
    [alert setInformativeText:informativeText];
    [alert setMessageText:message];
 
    [alert setAlertStyle:style];
 
    [alert beginSheetModalForWindow:[NSApp mainWindow] 
                      modalDelegate:sender 
                     didEndSelector:@selector(alertDidEnd:returnCode:contextInfo:) 
                        contextInfo:contextInfo];
 
}
 
@end

[CIModalSheetDialog showModalMessage:@"Dialog title" 
                     withInformativeText:@"Dialog content" 
                               withStyle:NSInformationalAlertStyle 
                              fromSender:self];

- (void) alertDidEnd:(NSAlert *)alert returnCode:(NSInteger)returnCode contextInfo:(void *)contextInfo

[CIModalSheetDialog showModalRequest:@"Dialog title" 
                     withInformativeText:@"Dialog content" 
                               withStyle:NSInformationalAlertStyle
                              andButtons:[NSArray arrayWithObjects:@"OK", @"Cancel", nil]
                          andContextInfo:@"Some identifying information"
                              fromSender:self];

- (void) alertDidEnd:(NSAlert *)alert returnCode:(NSInteger)returnCode contextInfo:(void *)contextInfo {
    if (contextInfo == @"Some identifying information") {
        if (returnCode == NSAlertSecondButtonReturn) { // OK button was clicked
            // Handle OK
        } else {
            // Handle Cancel
        }
    }
}