Android Open Source - ICalSynch I Cal Parser Thread

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
*    Copyright (C) 2010  Florian Falkner - ICal Synch for Android Smartphones
*/*from www .j a  v a 2  s.c  o m*/
*    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 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 General Public License for more details.
*
*    You should have received a copy of the GNU General Public License
*    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*
*/
package at.general.solutions.android.ical.parser;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;

import org.apache.commons.lang.StringUtils;

import android.util.Log;
import at.general.solutions.android.ical.activity.R;
import at.general.solutions.android.ical.model.ICalEvent;
import at.general.solutions.android.ical.utility.PreferencesUtility;
import at.general.solutions.android.ical.utility.ProgressThread;

public class ICalParserThread extends ProgressThread{
  private static final String LOG_TAG = "IcalParser";
  
    /* Ical Dateformat */
    private static SimpleDateFormat ICAL_DATETIME_FORMAT = new SimpleDateFormat("yyyyMMdd'T'HHmmss");
    private static SimpleDateFormat ICAL_DATE_FORMAT = new SimpleDateFormat("yyyyMMdd");
  
  private TimeZone icalDefaultTimeZone;
  private TimeZone userTimeZone;
  private String toParse;
  
  public ICalParserThread(String icalDefaultTimeZone, String userTimeZone, String toParse) {
    if (icalDefaultTimeZone.equalsIgnoreCase(PreferencesUtility.DEFAULT_TIMEZONE_PREF_VALUE)) {
      this.icalDefaultTimeZone = TimeZone.getTimeZone("UTC");
    }
    else {
      this.icalDefaultTimeZone = TimeZone.getTimeZone(icalDefaultTimeZone);
    }
    
    if (userTimeZone.equals(PreferencesUtility.DEFAULT_TIMEZONE_PREF_VALUE)) {
      this.userTimeZone = TimeZone.getDefault();
    }
    else {
      this.userTimeZone = TimeZone.getTimeZone(userTimeZone);
    }
    
        ICAL_DATETIME_FORMAT.setTimeZone(this.icalDefaultTimeZone);
        ICAL_DATE_FORMAT.setTimeZone(this.icalDefaultTimeZone);
    
    this.toParse = toParse;
  }
  
  @Override
  public void run() {
    super.sendInitMessage(R.string.parsingIcalFile);
    
    String[] lines = toParse.split("\n");
    
    super.sendMaximumMessage(lines.length);
    
    ICalEvent event = null;
    
    int i = 0;
    
    boolean inDescription = false;
    String description = "";
    
    for (String line : lines) {
      line = StringUtils.chomp(line);
      
      if (event == null) {
        if (line.contains(ICalTag.EVENT_START)) {
          event = new ICalEvent(userTimeZone);
        }
        inDescription = false;
      }
      else  if (line.contains(ICalTag.EVENT_END)) {
        event.setDescription(cleanText(description));
        
        if (event != null && event.getStart() != null) {
          super.sendProgressMessage(i, event);
        }
        event = null;
        description = "";
        inDescription = false;
      }
      else {
        if (line.contains(ICalTag.EVENT_SUMMARY)) {
          event.setSummary(cleanText(line.substring(ICalTag.EVENT_SUMMARY.length())));
        }
        else if (line.contains(ICalTag.EVENT_DATE_START)) {
          String dateLine = line.substring(ICalTag.EVENT_DATE_START.length());
          event.setStart(parseIcalDate(dateLine));
        }
        else if (line.contains(ICalTag.EVENT_DATE_END)) {
          String dateLine = line.substring(ICalTag.EVENT_DATE_END.length());
          event.setEnd(parseIcalDate(dateLine));
        }
        
        if (inDescription) {
          if (line.charAt(0) == ' ') {
            description += line.substring(1);
          }
        }
        else if (line.contains(ICalTag.EVENT_DESCRIPTION)) {
          description = line.substring(ICalTag.EVENT_DESCRIPTION.length());
          inDescription = true;
        }
        else {
          inDescription = false;
        }
      }
      i++;
    }
    
    super.sendFinishedMessage();
  }
  
  private String cleanText(String text) {
    text = StringUtils.replace(text, "\\n", "\n");
    text = StringUtils.replace(text, "\\,", ",");
    text = StringUtils.replace(text, "\\\"", "\"");
    return text;
  }
  
  private Date parseIcalDate(String dateLine)  {
    try {
      dateLine = StringUtils.replace(dateLine, ";", "");
      Date date = null;
      if (dateLine.contains(ICalTag.DATE_TIMEZONE)) {
        String[] parts = StringUtils.split(dateLine,":");
        ICAL_DATETIME_FORMAT.setTimeZone(TimeZone.getTimeZone(parts[0].substring(ICalTag.DATE_TIMEZONE.length(), parts[0].length())));
        date = ICAL_DATETIME_FORMAT.parse(parts[1]);
        ICAL_DATETIME_FORMAT.setTimeZone(icalDefaultTimeZone);
      }
      else if (dateLine.contains(ICalTag.DATE_VALUE)) {
        String[] parts = StringUtils.split(dateLine,":");
        date = ICAL_DATE_FORMAT.parse(parts[1]);
        date.setHours(0);
        date.setMinutes(0);
        date.setSeconds(0);
      }
      else {
        dateLine = StringUtils.replace(dateLine, ":", "");
        date = ICAL_DATETIME_FORMAT.parse(dateLine);
      }
      return date;
    }
    catch (ParseException e) {
      Log.e(LOG_TAG, "Cant't parse date!", e);
      return null;
    }
    }
  
}

Java Source Code List

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