package e4s.tutorial;

import e4s.html.*;
import e4s.html.input.extended.FILEUPLOAD;
import e4s.html.input.extended.E4InputFieldName;
import e4s.html.input.extended.E4ValidatorFileUpload;
import e4s.servlet.E4ModuleImplementation;

/**
 * Example on image uploading capabilities.
 * 
 * Simply create a form containing an IMAGEFIELD element, a pickup mechanism
 * provides also uploading and selection of images.
 *
 * {@tutorial Example_FILEUPLOAD}
 */
public class Example_FILEUPLOAD extends E4ModuleImplementation
{
	public static E4Method start = null;
	
	
	public static E4Method startA = null;
	public static E4Method startB = null;
	public static E4Method uploadA = null;
	public static E4Method uploadB = null;
 
	
	public void start(HTML html)
	{
		html.Message(E4Message.CAPTION,"File Upload Example");
		html.P();

		html.A(startA).print("Upload without validating example");
		html.P();
		html.A(startB).print("Upload and validating example");
	}
	
	public void startA(HTML html)
	{
		html.Message(E4Message.CAPTION,"File Upload Example - no validation");
		html.P();
		
		FORM form = html.FORM();
		form.setEncryptionType_Multidata();
		form.setAction(uploadA);
		
		form.TEXTFIELD(new E4InputFieldName("DESCRIPTION"),"Description",30);
		form.P();
		
		// whatever is the name of the source file, it will be stored on the server named
		// yourfile
		FILEUPLOAD f1 = form.FILEUPLOAD(new E4InputFieldName("FILE_1"),"File #1",30);
		f1.setServer_Name("yourfile.dat");
		f1.setServer_Path("uploaded/");
		form.P();
		
		FILEUPLOAD f2 = form.FILEUPLOAD(new E4InputFieldName("FILE_2"),"File #2",30);
		f2.setServer_Path("uploaded/");
		form.P();

		FILEUPLOAD f3 = form.FILEUPLOAD(new E4InputFieldName("FILE_3"),"File #3",30);
		form.P();

		form.FORM_Submit("Upload");
	}   
	
	
	public void uploadA(HTML html, E4CgiParams params)
	{
		html.Message(E4Message.INFO,"File upload completed or maybe errors");
		params.toTable(html.TABLE());
	}   

 
	public FORM makeForm()
	{
		FORM form = new FORM("TESTFORM");
		
		form.setEncryptionType_Multidata();
		form.setAction(uploadB);
		
		form.TEXTFIELD(new E4InputFieldName("DESCRIPTION"),"Description",30);
		form.P();
		
		// whatever is the name of the source file, it will be stored on the server named
		// yourfile. A validation routine is added, the input for this field is mandatory.
		// The filesize is limited to 10000 bytes
		FILEUPLOAD f1 = form.FILEUPLOAD(new E4InputFieldName("FILE_1"),"File #1",30);
		f1.setValidator(new E4ValidatorFileUpload(getServlet(),true));
		f1.setServer_Name("yourfile.dat");
		f1.setServer_Path("uploaded/");
		f1.setMaxUploadSize(10000);
		f1.setExtensionsAllowed( new String[]{"gif","jpg","jpeg","png"} );
		form.P();
		
		FILEUPLOAD f2 = form.FILEUPLOAD(new E4InputFieldName("FILE_2"),"File #2",30);
		f2.setValidator(new E4ValidatorFileUpload(getServlet(),false));
		f2.setServer_Path("uploaded/");
		form.P();

		FILEUPLOAD f3 = form.FILEUPLOAD(new E4InputFieldName("FILE_3"),"File #3",30);
		f3.setValidator(new E4ValidatorFileUpload(getServlet(),false));
		form.P();

		form.FORM_Submit("Upload");
		
		return form;
	}
	
	
	public void startB(HTML html)
	{
		html.Message(E4Message.CAPTION,"File Upload Example - including validation");
		html.P();
		
		FORM form = makeForm();
		html.addElement(form);
	}   
	
	
	public void uploadB(HTML html, E4CgiParams params)
	throws Exception      
	{
		FORM form = makeForm();
		
		if (! form.validate(params,getServlet()))
		{
			// validation failed, put the form to the html context and display again
			html.addElement(form);
		}
		else
		{
			html.Message(E4Message.INFO,"File upload completed");
			params.toTable(html.TABLE());
		}
	}   
}