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package org.madore.damlengine;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
import org.w3c.dom.*;
public class TodoWrefAttr extends TodoAttr {
public static class Factory extends TodoAttr.Factory {
@Override
public TodoWrefAttr newItem(Attr attr, Element owner,
Context ctx,
TodoItem caller) {
return new TodoWrefAttr(attr, owner, ctx, caller);
}
}
public TodoWrefAttr(Attr attr, Element owner,
Context ctx,
TodoItem caller) {
super(attr, owner, ctx, caller);
}
@Override
public void handle() {
final String wrefStr = attr.getValue();
final Matcher wrefMatcher = Pattern.compile("^\\#d\\.(\\d{4})-(\\d{2})-(\\d{2})\\.(\\d{4})(|\\..*)$").matcher(wrefStr);
if ( ! wrefMatcher.matches() )
throw new IllegalArgumentException("wref attribute must be of the form #d.YYYY-MM-DD.NNNN[.xxx]");
final String wrefYearStr = wrefMatcher.group(1);
final String wrefMonthStr = wrefMatcher.group(2);
final String wrefDayStr = wrefMatcher.group(3);
final String wrefNumberStr = wrefMatcher.group(4);
final int wrefNumber = Integer.parseInt(wrefNumberStr);
final String wrefSupplementStr = wrefMatcher.group(5);
String wrefCat;
if ( this.owner.hasAttributeNS(DamlEngine.DAML_NS, "wrefcat") ) {
wrefCat = this.owner.getAttributeNS(DamlEngine.DAML_NS, "wrefcat");
this.owner.removeAttributeNS(DamlEngine.DAML_NS, "wrefcat");
} else {
wrefCat = null;
}
final String baseDir = (ctx.gc.uriToTop==null)?"":(ctx.gc.uriToTop+"weblog/");
final WeblogSummary wsum = WeblogSummary.getSummary(ctx.dc);
final WeblogSummary.EntrySummary esum;
// Get entry for target link from weblog summary
if ( wsum != null && wsum.entries != null )
esum = wsum.entries.get(wrefNumber);
else
esum = null;
// Check consistency if summary was available
if ( esum != null ) {
if ( ! ((wrefYearStr+"-"+wrefMonthStr+"-"+wrefDayStr)
.equals(esum.date)) )
throw new IllegalArgumentException("date mismatch for reference to entry "+wrefNumberStr);
if ( wrefCat != null && ! wrefCat.equals("@month")
&& ! wrefCat.equals("@single") ) {
if ( esum.catSet == null || ! esum.catSet.contains(wrefCat) )
throw new IllegalArgumentException("reference to entry "+wrefNumberStr+" in wrong category "+wrefCat);
}
}
// Prepare link object
final WeblogLink lk;
if ( esum != null && esum.doSinglePage != null )
lk = new WeblogLink(wrefYearStr, wrefMonthStr, wrefDayStr,
wrefNumberStr, wrefSupplementStr,
esum.doSinglePage);
else
lk = new WeblogLink(wrefYearStr, wrefMonthStr, wrefDayStr,
wrefNumberStr, wrefSupplementStr);
// Decide whether link target is on this page
final boolean onThisPage;
if ( lk.singlePage != null && ! lk.supplementStr.equals("") ) {
// Linking to a _fragment_ of an entry that has a single page.
if ( ctx.wsc != null && ctx.wsc.sel != null
&& ctx.wsc instanceof Context.WeblogSingleSelectionContext
&& ((Context.WeblogSingleSelectionContext)ctx.wsc).number == wrefNumber )
onThisPage = true;
else
onThisPage = false;
} else {
if ( ctx.wsc != null && ctx.wsc.sel != null
&& ctx.wsc.sel.contains(wrefNumber) )
onThisPage = true;
else
onThisPage = false;
}
// Choose file portion of link target
if ( onThisPage )
lk.setTypeRelative();
else if ( wrefCat == null )
lk.setTypeStandard();
else if ( wrefCat.equals("@month") )
lk.setTypeMonth();
else if ( wrefCat.equals("@single") )
lk.setTypeSingle();
else
lk.setTypeCat(wrefCat);
// Construct full link target
String target = lk.getTarget(baseDir);
// Class and title attributes
if ( ! this.owner.hasAttributeNS(null, "class") )
this.owner.setAttributeNS(null, "class", "weblog-internal-link");
if ( wrefSupplementStr.equals("")
&& ! this.owner.hasAttributeNS(null, "title")
&& esum != null && esum.title != null )
this.owner.setAttributeNS(null, "title", esum.title);
// Replace this attribute by computed target
this.owner.removeAttributeNode(this.attr);
this.owner.setAttributeNS(null, "href", target);
}
}
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