/*******************************************************************************
* LastCalc - The last calculator you'll ever need
* Copyright (C) 2011, 2012 Uprizer Labs LLC
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Affero 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 Affero General Public License for more
* details.
******************************************************************************/
package com.lastcalc.lessons;
import java.io.IOException;
import java.nio.charset.Charset;
import java.util.*;
import java.util.logging.Logger;
import com.google.common.collect.*;
import org.jsoup.Jsoup;
import org.jsoup.nodes.*;
import com.google.appengine.api.utils.SystemProperty;
import com.lastcalc.*;
import com.lastcalc.servlets.*;
import com.lastcalc.servlets.WorksheetServlet.AnswerType;
import static com.google.appengine.api.utils.SystemProperty.environment;
public class Help {
private static final Logger log = Logger.getLogger(Help.class.getName());
public static Map<String, Lesson> lessons;
public static String helpDocAsString;
static {
lessons = Maps.newHashMap();
try {
final Document helpDoc = createHelpDoc();
helpDocAsString = helpDoc.toString();
for (final Element lessonElement : helpDoc.body().select("div.lesson")) {
final Lesson lesson = new Lesson(lessonElement);
lessons.put(lesson.id, lesson);
}
} catch (final Exception e) {
log.warning("Exception while processing tutorial.html " + e);
e.printStackTrace();
}
}
private static Document cachedHelpDoc;
public static Document getHelpDoc() throws IOException {
if (cachedHelpDoc == null || environment.value() == SystemProperty.Environment.Value.Development) {
cachedHelpDoc = createHelpDoc();
}
return cachedHelpDoc;
}
private static Document createHelpDoc() throws IOException {
final Document helpDoc = Jsoup.parse(Help.class.getResourceAsStream("help.html"), "UTF-8", "/");
helpDoc.outputSettings().charset(Charset.forName("UTF-8"));
helpDoc.head().appendElement("meta").attr("charset", "UTF-8");
helpDoc.head().appendElement("meta").attr("http-equiv", "Content-Type")
.attr("content", "text/html; charset=UTF-8");
// Process calculations
final SequentialParser sp = SequentialParser.create();
for (final Element oldQuestion : helpDoc.select("div.question")) {
final String questionText = oldQuestion.text();
oldQuestion.text("");
oldQuestion.removeClass("question");
oldQuestion.addClass("helpline").addClass("firstLine");
final Element line = oldQuestion;
final TokenList tokenizedQuestion = Tokenizer.tokenize(questionText);
final TokenList answer = sp.parseNext(tokenizedQuestion);
// Important to render the question after we've calculated the
// answer so that variables are lighlighted in the line they are
// created in
final String questionAsHtml = Renderers.toHtml("/", tokenizedQuestion, sp.getUserDefinedKeywordMap())
.toString();
final TokenList strippedAnswer = sp.stripUDF(answer);
final AnswerType answerType = WorksheetServlet.getAnswerType(strippedAnswer);
line.appendElement("div").addClass("helpquestion").html(questionAsHtml);
if (answerType.equals(AnswerType.NORMAL)) {
line.appendElement("div").attr("class", "equals").text("=");
line.appendElement("div").attr("class", "answer")
.html(Renderers.toHtml("/", strippedAnswer).toString());
} else {
line.appendElement("div").attr("class", "equals")
.html("<span style=\"font-size:10pt;\">✓</span>");
line.appendElement("div").attr("class", "answer");
}
}
// Create menu
final Element menuUl = helpDoc.select("ul#menu").first();
for (final Element header : helpDoc.select("div.section h1")) {
final String headerText = header.text();
final String anchor = headerText.toLowerCase().replace(' ', '-');
header.html("<a name=\"" + anchor + "\">" + headerText + "</a>");
menuUl.appendElement("li").attr("data-section", anchor).text(headerText);
}
return helpDoc;
}
public static class Lesson {
public Lesson(final Element lesson) {
id = lesson.id();
explanation = lesson.select("div.explanation").first();
requires = Sets.newHashSet();
for (final Element li : lesson.select("div.requires li")) {
requires.add(li.text());
}
}
public String id;
public Element explanation;
public Set<String> requires;
}
}