/*
* Copyright (C) 2010-2011 Geometer Plus <contact@geometerplus.com>
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
package org.geometerplus.fbreader.network.opds;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
class OpenSearchDescription {
public static OpenSearchDescription createDefault(String template) {
return new OpenSearchDescription(template, -1, -1);
}
public final String Template;
public final int IndexOffset;
public final int PageOffset;
public final int ItemsPerPage = 20;
OpenSearchDescription(String template, int indexOffset, int pageOffset) {
Template = template;
IndexOffset = indexOffset;
PageOffset = pageOffset;
}
public boolean isValid() {
return makeQuery("") != null;
}
// searchTerms -- an HTML-encoded string
public String makeQuery(String searchTerms) {
final StringBuffer query = new StringBuffer();
final Matcher m = Pattern.compile("\\{(.*)\\}").matcher(Template);
while (m.find()) {
String name = m.group(1);
if (name == null || name.length() == 0 || name.contains(":")) {
return null;
}
final boolean optional = name.endsWith("?");
if (optional) {
name = name.substring(0, name.length() - 1);
}
name = name.intern();
if (name == "searchTerms") {
m.appendReplacement(query, searchTerms);
} else if (name == "count") {
m.appendReplacement(query, String.valueOf(ItemsPerPage));
} else if (optional) {
m.appendReplacement(query, "");
} else if (name == "startIndex") {
if (IndexOffset > 0) {
m.appendReplacement(query, String.valueOf(IndexOffset));
} else {
return null;
}
} else if (name == "startPage") {
if (PageOffset > 0) {
m.appendReplacement(query, String.valueOf(PageOffset));
} else {
return null;
}
} else if (name == "language") {
m.appendReplacement(query, "*");
} else if (name == "inputEncoding" || name == "outputEncoding") {
m.appendReplacement(query, "UTF-8");
} else {
return null;
}
}
m.appendTail(query);
return query.toString();
}
}