ExamImpl.java

package org.voidsink.kussslib.impl;

import java.text.ParseException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import org.voidsink.kussslib.Exam;
import org.voidsink.kussslib.Term;

public class ExamImpl implements Exam {

	private static final Pattern courseIdTermPattern = Pattern
			.compile(Parser.PATTERN_LVA_NR_COMMA_TERM);
	private static final Pattern courseIdPattern = Pattern
			.compile(Parser.PATTERN_LVA_NR);
	private static final Pattern termPattern = Pattern
			.compile(Parser.PATTERN_TERM);
	private static final Pattern timePattern = Pattern
			.compile("\\d{2}\\:\\d{2}");

	private String courseId;
	private Term term;
	private Date dtStart;
	private Date dtEnd;
	private String location;
	private String title;
	private int cid;
	private String description;
	private String info;
	private boolean isRegistered;
	private int maxParticipants;
	private int participants;
	private Date registrationDtStart;
	private Date registrationDtEnd;
	private Date unregistrationDt;

	ExamImpl(String courseId, Term term, Date dtStart, Date dtEnd,
			String location, String title, int cid, String description,
			String info, boolean isRegistered, int maxParticipants,
			int participants, Date registrationDtStart, Date registrationDtEnd,
			Date unregistrationDt) {

		this.courseId = courseId;
		this.term = term;
		this.dtStart = dtStart;
		this.dtEnd = dtEnd;
		this.location = location;
		this.title = title;
		this.cid = cid;
		this.description = description;
		this.info = info;
		this.isRegistered = isRegistered;
		this.maxParticipants = maxParticipants;
		this.participants = participants;
		this.registrationDtStart = registrationDtStart;
		this.registrationDtEnd = registrationDtEnd;
		this.unregistrationDt = unregistrationDt;
	}

	public ExamImpl(Element row, boolean isNewExam) throws ParseException {

		this("", null, null, null, "", "", 0, "", "", false, 0, 0, null, null,
				null);

		Elements columns = row.getElementsByTag("td");

		if (isNewExam) {

			// allow only exams that can be selected
			if (columns.size() >= 5
					&& columns.get(0).select("input").size() == 1) {

				Matcher courseIdTermMatcher = courseIdTermPattern
						.matcher(columns.get(1).text()); // (courseId,term)

				if (courseIdTermMatcher.find()) {

					String courseIdTerm = courseIdTermMatcher.group();
					title = columns.get(1).text()
							.substring(0, courseIdTermMatcher.start());

					Matcher courseIdMatcher = courseIdPattern
							.matcher(courseIdTerm); // courseId

					if (courseIdMatcher.find()) {
						courseId = courseIdMatcher.group();
					}

					Matcher termMatcher = termPattern.matcher(courseIdTerm); // term

					if (termMatcher.find(courseIdMatcher.end())) {
						term = Term.parseTerm(termMatcher.group());
					}

					setDateTimeLocation(columns.get(2).text(), columns.get(3)
							.text());

					isRegistered = false;
				}
			}

		} else {

			if (columns.size() >= 5
					&& columns.get(4).select("input").size() == 1) {

				Matcher courseIdTermMatcher = courseIdTermPattern
						.matcher(columns.get(0).text()); // (courseId, term)

				if (courseIdTermMatcher.find()) {

					String courseIdTerm = courseIdTermMatcher.group();
					title = columns.get(0).text()
							.substring(0, courseIdTermMatcher.start());

					Matcher courseIdMatcher = courseIdPattern
							.matcher(courseIdTerm); // courseId

					if (courseIdMatcher.find()) {
						courseId = courseIdMatcher.group();
					}

					Matcher termMatcher = termPattern.matcher(courseIdTerm); // term

					if (termMatcher.find(courseIdMatcher.end())) {
						term = Term.parseTerm(termMatcher.group());
					}

					setDateTimeLocation(columns.get(1).text(), columns.get(2)
							.text());

					isRegistered = (columns.get(0)
							.getElementsByClass("assignment-inactive").size() == 0);
				}
			}
		}
	}

	private void setDateTimeLocation(String dateStr, String timeLocationStr)
			throws ParseException {

		String[] splitted = timeLocationStr.split("\\/");

		String time = "";
		String startTime = "";
		String endTime = "";
		String location = "";

		try {
			if (splitted.length > 1) {
				time = extractTimeString(splitted[0]);
				location = splitted[1];
			} else {
				time = extractTimeString(splitted[0]);
			}
		} catch (Exception e) {
			// TODO: REMOVE EXCEPTION HANDLING HERE BECAUSE NO EXCEPTION THROWN?
			// Log.e(TAG, "cant parse string", e);
			// Analytics.sendException(c, e, false, timeLocation);
		}

		int mSign = time.indexOf("-");

		startTime = time.substring(0, mSign - 1);
		endTime = time.substring(mSign + 1);

		this.location = location;

		this.dtStart = Parser.parseDateWithTime(dateStr + startTime,
				Parser.FAILED_PARSING_START_DATE_WITH_TIME);
		this.dtEnd = Parser.parseDateWithTime(dateStr + endTime,
				Parser.FAILED_PARSING_END_DATE_WITH_TIME);

	}

	private String extractTimeString(String time) {
		List<String> times = new ArrayList<>();
		// extract times
		Matcher timeMatcher = timePattern.matcher(time);
		while (timeMatcher.find()) {
			times.add(timeMatcher.group());
		}
		// remove duplicates
		int i = 0;
		while (i < times.size() - 1) {
			if (times.get(i).equals(times.get(i + 1))) {
				times.remove(i + 1);
			} else {
				i++;
			}
		}

		// create new time string
		String result = "";
		for (String s : times) {
			if (!result.isEmpty()) {
				result += " - ";
			}
			result += s;
		}

		return result;
	}

	public boolean isInitialized() {
		return !this.courseId.isEmpty() && !TextUtils.isEmpty(this.term)
				&& this.dtStart != null && this.dtEnd != null;
	}

	public void addAdditionalInfo(Element element) {
		// TODO Auto-generated method stub

	}

	public String getCourseId() {
		return courseId;
	}

	public Term getTerm() {
		return term;
	}

	public Date getDtStart() {
		return dtStart;
	}

	public Date getDtEnd() {
		return dtEnd;
	}

	public String getLocation() {
		return location;
	}

	public String getTitle() {
		return title;
	}

	public int getCid() {
		return cid;
	}

	public String getDescription() {
		return description;
	}

	public String getInfo() {
		return info;
	}

	public boolean isRegistered() {
		return isRegistered;
	}

	public int getMaxParticipants() {
		return maxParticipants;
	}

	public int getParticipants() {
		return participants;
	}

	public Date getRegistrationDtStart() {
		return registrationDtStart;
	}

	public Date getRegistrationDtEnd() {
		return registrationDtEnd;
	}

	public Date getUnRegistrationDt() {
		return unregistrationDt;
	}

}