NSString_MultiMarkdown.m

//
//  NSString_MultiMarkdown.m
//  Notation
//
//  Created by Christian Tietze on 2010-10-10.
//

#import "NSString_MultiMarkdown.h"
#import "PreviewController.h"
#import "AppController.h"
#import "NoteObject.h"

@implementation NSString (MultiMarkdown)

/**
 * Locating a MultiMarkdown parsing script.  The options are as follows:
 *   1.  ~/Library/Application Support/MultiMarkdown/bin/mmd2ZettelXHTML.pl
 *   2.  ~/Library/Application Support/MultiMarkdown/bin/mmd2XHTML.pl
 *   3.  <Application>/MultiMarkdown/bin/mmd2ZettelXHTML.pl
 *
 * The third option should be a safe fallback since the appropriate MMD bundle
 * is included and shipped with this application.
 */
+(NSString*)mmdDirectory {
    // fallback path in this program's directiory
    NSString *bundlePath = [[[NSBundle mainBundle] resourcePath]
                              stringByAppendingPathComponent:@"multimarkdown"];
    return bundlePath;
} // mmdDirectory

+(NSString*)tp2mdDirectory {
  NSString *bundlePath = [[[NSBundle mainBundle] resourcePath]
                          stringByAppendingPathComponent:@"tp2md.rb"];
  return bundlePath;
}

+(NSString*)processTaskPaper:(NSString*)inputString
{
    if (inputString)
    {
        NSString *taskPaperScriptPath = @"/System/Library/Frameworks/Ruby.framework/Versions/Current/usr/bin/ruby";


        NSString *argPath = [[NSBundle mainBundle] pathForResource:@"tp2md"
                                                            ofType:@"rb"
                                                       inDirectory:NULL];

        NSTask *taskPaperTask = [[[NSTask alloc] init] autorelease];
        NSPipe *stdinPipe = [NSPipe pipe];
        NSPipe *stdoutPipe = [NSPipe pipe];
        NSFileHandle *stdinFileHandle = [stdinPipe fileHandleForWriting];
        NSFileHandle *stdoutFileHandle = [stdoutPipe fileHandleForReading];

        [taskPaperTask setStandardInput:stdinPipe];
        [taskPaperTask setStandardOutput:stdoutPipe];

        [taskPaperTask setLaunchPath:taskPaperScriptPath];
        NSArray *argArray = [NSArray arrayWithObject:argPath];
        [taskPaperTask setArguments:argArray];

        [taskPaperTask launch];

        NSString *blech = [NSString stringWithUTF8String:[inputString UTF8String]];

        [stdinFileHandle writeData:[blech dataUsingEncoding:NSUTF8StringEncoding]];
        [stdinFileHandle closeFile];

        NSData *outputData = [stdoutFileHandle readDataToEndOfFile];
        inputString = [[[NSString alloc] initWithData:outputData
                                            encoding:NSUTF8StringEncoding] autorelease];

        [stdoutFileHandle closeFile];


        [taskPaperTask waitUntilExit];

        [taskPaperTask terminate];
    }

	return inputString;
	
}


+(NSString*)processMultiMarkdown:(NSString*)inputString
{
  NSRange archiveFoundRange = [inputString rangeOfString:@"Archive:"];
  NSRange tagFoundRange = [inputString rangeOfString:@"@taskpaper"];
  if (archiveFoundRange.location != NSNotFound || tagFoundRange.location != NSNotFound) {
    inputString = [self processTaskPaper:inputString];
  }
	NSString* mdScriptPath = [[self class] mmdDirectory];
//    NSString* tpScriptPath = [[self class] tp2mdDirectory];
	NSTask* task = [[[NSTask alloc] init] autorelease];
	NSMutableArray* args = [NSMutableArray array];
	
	[task setArguments:args];
	
	NSPipe* stdinPipe = [NSPipe pipe];
	NSPipe* stdoutPipe = [NSPipe pipe];
	NSFileHandle* stdinFileHandle = [stdinPipe fileHandleForWriting];
	NSFileHandle* stdoutFileHandle = [stdoutPipe fileHandleForReading];
	
	[task setStandardInput:stdinPipe];
	[task setStandardOutput:stdoutPipe];
	
	[task setLaunchPath: [mdScriptPath stringByExpandingTildeInPath]];
	[task launch];
	
	[stdinFileHandle writeData:[inputString dataUsingEncoding:NSUTF8StringEncoding]];
	[stdinFileHandle closeFile];
	
	NSData* outputData = [stdoutFileHandle readDataToEndOfFile];
	NSString* outputString = [[[NSString alloc] initWithData:outputData encoding:NSUTF8StringEncoding] autorelease];
	[stdoutFileHandle closeFile];
	
	[task waitUntilExit];
	
	return outputString;
	
}

+(NSString*)documentWithProcessedMultiMarkdown:(NSString*)inputString
{
  AppController *app = [[NSApplication sharedApplication] delegate];
  NSString *processedString = [self processMultiMarkdown:inputString];
  NSString *htmlString = [[PreviewController class] html];
  NSString *cssString = [[PreviewController class] css];
  NSMutableString *outputString = [NSMutableString stringWithString:(NSString *)htmlString];
  NSString *noteTitle =  ([app selectedNoteObject]) ? [NSString stringWithFormat:@"%@",titleOfNote([app selectedNoteObject])] : @"";
		NSString *nvSupportPath = [[NSFileManager defaultManager] applicationSupportDirectory];

  [outputString replaceOccurrencesOfString:@"{%support%}" withString:nvSupportPath options:0 range:NSMakeRange(0, [outputString length])];
  [outputString replaceOccurrencesOfString:@"{%title%}" withString:noteTitle options:0 range:NSMakeRange(0, [outputString length])];
  [outputString replaceOccurrencesOfString:@"{%content%}" withString:processedString options:0 range:NSMakeRange(0, [outputString length])];
  [outputString replaceOccurrencesOfString:@"{%style%}" withString:cssString options:0 range:NSMakeRange(0, [outputString length])];
  return outputString;
}

+(NSString*)xhtmlWithProcessedMultiMarkdown:(NSString*)inputString
{
	return [self processMultiMarkdown:inputString];
}

+(NSString*)stringWithProcessedMultiMarkdown:(NSString*)inputString
{
	return [self processMultiMarkdown:inputString];
} // stringWithProcessedMultiMarkdown:

@end // NSString (MultiMarkdown)