// XAAL toolkit
// Copyright (C) 2009 Ville Karavirta <vkaravir(a)cs.hut.fi>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
package xaal.parser.modules;

import java.net.MalformedURLException;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;

import xaal.objects.Xaal;
import xaal.objects.metadata.Application;
import xaal.objects.metadata.Author;
import xaal.objects.metadata.Metadata;
import xaal.parser.ParserModule;

public class XaalMetadataParserModule extends ParserModule {

    public XaalMetadataParserModule() {
        super();
    }

    public void characters(char[] text, int start, int length) {
        if (peek() != null && peek() instanceof StringBuffer) {
            StringBuffer sb = (StringBuffer) peek();
            for (int i = start; i < start + length; i++)
                sb.append(text[i]);
        }
    }

    public void startElementMetadata(String namespaceURI, String localName,
            String qName, Attributes atts) throws SAXException {
        Metadata md = new Metadata();
        ((Xaal) getProperty("xaal-root")).setMetadata(md);
        push(md);
    }


    public void endElementMetadata(String namespaceURI, String localName, String qName)
            throws SAXException {
        pop();
    }

    public void startElementAnimationInfo(String namespaceURI,
            String localName, String qName, Attributes atts)
            throws SAXException {
    }

    public void startElementTitle(String namespaceURI, String localName,
            String qName, Attributes atts) throws SAXException {
        if (peek() != null && peek() instanceof Metadata)
            push(new StringBuffer());
    }

    public void endElementTitle(String namespaceURI, String localName, String qName) {
        if (peek() != null && peek() instanceof StringBuffer) {
            StringBuffer sb = (StringBuffer) pop();
            ((Metadata) peek()).setTitle(sb.toString().trim());
        } else {
            // TODO error handling of not well-formed title element
        }
    }

    public void startElementDesc(String namespaceURI, String localName,
            String qName, Attributes atts) {
        if (peek() != null && peek() instanceof Metadata)
            push(new StringBuffer());
    }


    public void endElementDesc(String namespaceURI, String localName, String qName)
            throws SAXException {
        if (peek() != null && peek() instanceof StringBuffer) {
            StringBuffer sb = (StringBuffer) pop();
            ((Metadata) peek()).setDesc(sb.toString().trim());
        } else {
            // TODO error handling of not well-formed title element
        }
     }

    public void startElementSubject(String namespaceURI, String localName,
            String qName, Attributes atts) throws SAXException {
        if (peek() != null && peek() instanceof Metadata)
            push(new StringBuffer());
     }

    public void endElementSubject(String namespaceURI, String localName, String qName)
            throws SAXException {
        if (peek() != null && peek() instanceof StringBuffer) {
            StringBuffer sb = (StringBuffer) pop();
            ((Metadata) peek()).setSubject(sb.toString().trim());
        } else {
            // TODO error handling of not well-formed title element
        }
     }
    

    public void startElementKeyword(String namespaceURI, String localName,
            String qName, Attributes atts) throws SAXException {
        if (peek() != null && peek() instanceof Metadata)
            push(new StringBuffer());
     }

    public void endElementKeyword(String namespaceURI, String localName, String qName)
            throws SAXException {
        if (peek() != null && peek() instanceof StringBuffer) {
            StringBuffer sb = (StringBuffer) pop();
            ((Metadata) peek()).addKeyword(sb.toString().trim());
        } else {
            // TODO error handling of not well-formed title element
        }
     }


    public void startElementAuthor(String namespaceURI, String localName,
            String qName, Attributes atts) throws SAXException {
        if (peek() != null && peek() instanceof Metadata) {
            Author a = new Author();
            ((Metadata) peek()).addAuthor(a);
            push(a);
        } else {
            // TODO error handling of not well-formed title element
            push(null);
        }
    }

    public void endElementAuthor(String namespaceURI, String localName, String qName)
            throws SAXException {
        pop();
    }

    public void startElementFirstname(String namespaceURI, String localName,
            String qName, Attributes atts) throws SAXException {
        if (peek() != null && peek() instanceof Author)
            push(new StringBuffer());
    }


    public void endElementFirstname(String namespaceURI, String localName, String qName)
            throws SAXException {
        if (peek() != null && peek() instanceof StringBuffer) {
            StringBuffer sb = (StringBuffer) pop();
            if (peek() instanceof Author)
                ((Author) peek()).setFirstName(sb.toString().trim());
        }
    }


    public void startElementLastname(String namespaceURI, String localName,
            String qName, Attributes atts) throws SAXException {
        if (peek() != null && peek() instanceof Author)
            push(new StringBuffer());
     }

    public void endElementLastname(String namespaceURI, String localName, String qName)
            throws SAXException {
        if (peek() != null && peek() instanceof StringBuffer) {
            StringBuffer sb = (StringBuffer) pop();
            if (peek() instanceof Author)
                ((Author) peek()).setLastName(sb.toString().trim());
        }
    }


    public void startElementAffiliation(String namespaceURI, String localName,
            String qName, Attributes atts) throws SAXException {
        if (peek() != null && peek() instanceof Author)
            push(new StringBuffer());
     }

    public void endElementAffiliation(String namespaceURI, String localName, String qName)
            throws SAXException {
        if (peek() != null && peek() instanceof StringBuffer) {
            StringBuffer sb = (StringBuffer) pop();
            if (peek() instanceof Author)
                ((Author) peek()).setAffiliation(sb.toString().trim());
        }
    }

    public void startElementEmail(String namespaceURI, String localName,
            String qName, Attributes atts) throws SAXException {
        if (peek() != null && peek() instanceof Author)
            push(new StringBuffer());
     }

    public void endElementEmail(String namespaceURI, String localName, String qName)
            throws SAXException {
        if (peek() != null && peek() instanceof StringBuffer) {
            StringBuffer sb = (StringBuffer) pop();
            if (peek() instanceof Author)
                ((Author) peek()).setEmail(sb.toString().trim());
        }
     }

   public void startElementApplication(String namespaceURI, String localName,
            String qName, Attributes atts) throws SAXException {
        if (peek() != null && peek() instanceof Metadata) {
            Application a = new Application();
            ((Metadata) peek()).addApplication(a);
            push(a);
        } else {
            // TODO error handling of not well-formed title element
            push(null);
        }
    }

   public void endElementApplication(String namespaceURI, String localName, String qName)
           throws SAXException {
       pop();
   } 

   public void startElementName(String namespaceURI, String localName,
           String qName, Attributes atts) throws SAXException {
       if (peek() != null && peek() instanceof Application)
           push(new StringBuffer());
   }
   
   public void endElementName(String namespaceURI, String localName, String qName)
           throws SAXException {
       if (peek() != null && peek() instanceof StringBuffer) {
           StringBuffer sb = (StringBuffer) pop();
           ((Application) peek()).setName(sb.toString().trim());
       }
   }

   public void startElementVersion(String namespaceURI, String localName,
           String qName, Attributes atts) throws SAXException {
       if (peek() != null && peek() instanceof Application)
           push(new StringBuffer());
   }
   
   public void endElementVersion(String namespaceURI, String localName, String qName)
           throws SAXException {
       if (peek() != null && peek() instanceof StringBuffer) {
           StringBuffer sb = (StringBuffer) pop();
           ((Application) peek()).setVersion(sb.toString().trim());
       }
   }

   public void startElementHomepage(String namespaceURI, String localName,
           String qName, Attributes atts) throws SAXException {
       if (peek() != null && peek() instanceof Application)
           push(new StringBuffer());
   }
   
   public void endElementHomepage(String namespaceURI, String localName, String qName)
           throws SAXException {
       if (peek() != null && peek() instanceof StringBuffer) {
           StringBuffer sb = (StringBuffer) pop();
           try {
            ((Application) peek()).setHomepage(sb.toString().trim());
        } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
       }
   }

}