module transformtango;

import tango.io.Buffer;
import tango.io.File;
import tango.io.Stdout;
import tango.time.StopWatch;
import tango.text.xml.Document;
import tango.text.xml.DocPrinter;
import tango.text.xml.XmlPrinter;

/*******************************************************************************

*******************************************************************************/

void main()
{
        StopWatch w;
        uint count = 1000;
        int intRes = 0;

        auto doc = new Document!(char);
        auto content = cast (char[]) File("blog.xml").read;
        //auto print = new DocPrinter!(char);
        auto print = new XmlPrinter!(char);
        auto buf = new Buffer (content.length * 2);
        
        w.start;
        for (uint i = count; --i;) {
                //parse the doc
                doc.parse(content);
                
                
                //count(//*)
                intRes = doc.query.descendant.count;
                      
                // return every item, as if we are going to list them
                // //item
                auto set = doc.query.descendant("item");
        
                // return every item, as if we are going to list them
                // /blog/item
                set = doc.query["blog"]["item"];
        
                // all text nodes
                // //text()
                set = doc.query.descendant.data;
        
                // count of every item
                // cont(//item)
                intRes = doc.query.descendant("item").count;
        
                // count of every item, knowing the schema
                // count(/blog/item)
                intRes = doc.query["blog"]["item"].count;
        
                // finding an item element knowing the "id", contained in an attribute
                // /blog/item[@num='a781']
                set = doc.query["blog"]["item"].filter((doc.Node n) {return n.hasAttribute("num","a781");});
                foreach(node; set)
                        node.detach;
                
                // /blog/item/body/p/a
                set = doc.query["blog"]["item"]["body"]["p"]["a"];
                foreach(node; set)
                        node.detach;
                
                //serialze the result
                print (doc.root, (char[][] s...){foreach(t; s) buf.append(t);});
                //buf.write(print(doc));
                buf.clear;
        }
        Stdout.formatln("cycle complete in average of {} ms", w.stop/count*1000);
        File("blog2.xml").write(print(doc));

}