//---------------------------------------------------------------------------------------
// Copyright (c) 2001-2012 by PDFTron Systems Inc. All Rights Reserved.
// Consult legal.txt regarding legal and license information.
//---------------------------------------------------------------------------------------

#import <OBJC/PDFNetOBJC.h>
#import <Foundation/Foundation.h>

//---------------------------------------------------------------------------------------
// PDFNet includes a full support for FDF (Forms Data Format) and capability to merge/extract 
// forms data (FDF) with/from PDF. This sample illustrates basic FDF merge/extract functionality 
// available in PDFNet.
//---------------------------------------------------------------------------------------
int main(int argc, char *argv[])
{
	NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
	int ret = 0;
	[PDFNet Initialize: 0];

	// Example 1)
	// Iterate over all form fields in the document. Display all field names.
	@try  
	{
		PDFDoc *doc = [[PDFDoc alloc] initWithFilepath: @"../../TestFiles/form1.pdf"];
		[doc InitSecurityHandler];

        FieldIterator *itr;
		for(itr = [doc GetFieldIterator]; [itr HasNext]; [itr Next]) 
		{
			NSLog(@"Field name: %@", [[itr Current] GetName]);
			NSLog(@"Field partial name: %@", [[itr Current] GetPartialName]);

			NSLog(@"Field type: ");
			int type = [[itr Current] GetType];
			switch(type)
			{
			case e_button: NSLog(@"Button"); break;
			case e_text: NSLog(@"Text"); break;
			case e_choice: NSLog(@"Choice"); break;
			case e_signature: NSLog(@"Signature"); break;
			}

			NSLog(@"------------------------------");
		}

		NSLog(@"Done.");
	}
	@catch(NSException *e)
	{
		NSLog(@"%@", [e reason]);
		ret = 1;
	}
	
	// Example 2) Merge data from FDF
	@try  
	{
		NSLog(@"Merge data from FDF.");

		PDFDoc *doc = [[[PDFDoc alloc] initWithFilepath: @"../../TestFiles/form1.pdf"] autorelease];
		[doc InitSecurityHandler];

		FDFDoc *fdf_doc = [[[FDFDoc alloc] initWithFilepath: @"../../TestFiles/form1_data.fdf"] autorelease];
		[doc FDFMerge: fdf_doc];

		// To use PDFNet form field appearance generation instead of relying on 
		// Acrobat, uncomment the following two lines:
		// doc.RefreshFieldAppearances();
		// doc.GetAcroForm()->Put("NeedAppearances", new Bool(false));

		[doc SaveToFile: @"../../TestFiles/Output/form1_filled.pdf" flags: e_linearized];

		// Now merge data from XFDF. First create a FDF document from a XFDF file, then
		// merge data from FDF.
		FDFDoc *xfdf_doc = [FDFDoc CreateFromXFDF: @"../../TestFiles/form1_data.xfdf"];
		[doc FDFMerge: xfdf_doc];

		[doc SaveToFile: @"../../TestFiles/Output/form1_filled_xfdf.pdf" flags: e_linearized];

		NSLog(@"Done.");
	}
	@catch(NSException *e)
	{
		NSLog(@"%@", [e reason]);
		ret = 1;
	}

	// Example 3) Extract data to FDF
	@try  
	{
		NSLog(@"Extract data to FDF.");

		PDFDoc *in_doc = [[[PDFDoc alloc] initWithFilepath: @"../../TestFiles/Output/form1_filled.pdf"] autorelease];
		[in_doc InitSecurityHandler];

		FDFDoc *doc = [in_doc FDFExtract];
		[doc SetPDFFileName: @"../form1.pdf"];
		[doc SaveFDFDocToFile: @"../../TestFiles/Output/form1_filled_data.fdf"];

		// Now save the FDF document in XFDF format
		[doc SaveAsXFDF: @"../../TestFiles/Output/form1_filled_data.xfdf"];

		NSLog(@"Done.");
	}
	@catch(NSException *e)
	{
		NSLog(@"%@", [e reason]);
		ret = 1;
	}

	// Example 4) Read FDF files directly
	@try  
	{
		FDFDoc *doc = [[[FDFDoc alloc] initWithFilepath: @"../../TestFiles/Output/form1_filled_data.fdf"] autorelease];

        FDFFieldIterator *itr;
		for(itr = [doc GetFieldIterator]; [itr HasNext]; [itr Next]) 
		{
			NSLog(@"Field name: %@", [[itr Current] GetName]);
			NSLog(@"Field partial name: %@", [[itr Current] GetPartialName]);

			NSLog(@"------------------------------");
		}

		NSLog(@"Done.");
	}
	@catch(NSException *e)
	{
		NSLog(@"%@", [e reason]);
		ret = 1;
	}
	
	// Example 5) Direct generation of FDF.
	@try  
	{
		FDFDoc *doc = [[FDFDoc alloc] init];
		// Create new fields (i.e. key/value pairs).
		[doc FieldCreateWithString: @"Company" type: e_text field_value: @"PDFTron Systems"];
		[doc FieldCreateWithString: @"First Name" type: e_text field_value: @"John"];
		[doc FieldCreateWithString: @"Last Name"  type: e_text field_value: @"Doe"];
		// ...		

		// [doc SetPdfFileName: @"mydoc.pdf"];

		[doc SaveFDFDocToFile: @"../../TestFiles/Output/sample_output.fdf"];
		NSLog(@"Done.");
	}
	@catch(NSException *e)
	{
		NSLog(@"%@", [e reason]);
		ret = 1;
	}
	
	[pool release];
	return ret;
}