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package de.danoeh.antennapod.core.util;
import android.content.Context;
import android.util.Log;
import org.apache.commons.lang3.StringUtils;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Locale;
import java.util.TimeZone;
/**
* Parses several date formats.
*/
public class DateUtils {
private static final String TAG = "DateUtils";
private static final SimpleDateFormat parser = new SimpleDateFormat("", Locale.US);
private static final TimeZone defaultTimezone = TimeZone.getTimeZone("GMT");
static {
parser.setLenient(false);
parser.setTimeZone(defaultTimezone);
}
public static Date parse(final String input) {
if(input == null) {
throw new IllegalArgumentException("Date must not be null");
}
String date = input.trim().replace('/', '-').replaceAll("( ){2,}+", " ");
// if datetime is more precise than seconds, make sure the value is in ms
if(date.contains(".")) {
int start = date.indexOf('.');
int current = start+1;
while(current < date.length() && Character.isDigit(date.charAt(current))) {
current++;
}
// even more precise than microseconds: discard further decimal places
if(current - start > 4) {
if(current < date.length()-1) {
date = date.substring(0, start + 4) + date.substring(current);
} else {
date = date.substring(0, start + 4);
}
// less than 4 decimal places: pad to have a consistent format for the parser
} else if(current - start < 4) {
if(current < date.length()-1) {
date = date.substring(0, current) + StringUtils.repeat("0", 4-(current-start)) + date.substring(current);
} else {
date = date.substring(0, current) + StringUtils.repeat("0", 4-(current-start));
}
}
}
String[] patterns = {
"dd MMM yy HH:mm:ss Z",
"dd MMM yy HH:mm Z",
"EEE, dd MMM yyyy HH:mm:ss Z",
"EEE, dd MMM yyyy HH:mm:ss",
"EEE, dd MMMM yyyy HH:mm:ss Z",
"EEE, dd MMMM yyyy HH:mm:ss",
"EEEE, dd MMM yyyy HH:mm:ss Z",
"EEEE, dd MMM yy HH:mm:ss Z",
"EEEE, dd MMM yyyy HH:mm:ss",
"EEEE, dd MMM yy HH:mm:ss",
"EEE MMM d HH:mm:ss yyyy",
"EEE, dd MMM yyyy HH:mm Z",
"EEE, dd MMM yyyy HH:mm",
"EEE, dd MMMM yyyy HH:mm Z",
"EEE, dd MMMM yyyy HH:mm",
"EEEE, dd MMM yyyy HH:mm Z",
"EEEE, dd MMM yy HH:mm Z",
"EEEE, dd MMM yyyy HH:mm",
"EEEE, dd MMM yy HH:mm",
"EEE MMM d HH:mm yyyy",
"yyyy-MM-dd'T'HH:mm:ss",
"yyyy-MM-dd'T'HH:mm:ss.SSS Z",
"yyyy-MM-dd'T'HH:mm:ss.SSS",
"yyyy-MM-dd'T'HH:mm:ssZ",
"yyyy-MM-dd'T'HH:mm:ss'Z'",
"yyyy-MM-ddZ",
"yyyy-MM-dd"
};
ParsePosition pos = new ParsePosition(0);
for(String pattern : patterns) {
parser.applyPattern(pattern);
pos.setIndex(0);
try {
Date result = parser.parse(date, pos);
if (result != null && pos.getIndex() == date.length()) {
return result;
}
} catch(Exception e) {
Log.e(TAG, Log.getStackTraceString(e));
}
}
Log.d(TAG, "Could not parse date string \"" + input + "\" [" + date + "]");
return null;
}
/**
* Takes a string of the form [HH:]MM:SS[.mmm] and converts it to
* milliseconds.
*
* @throws java.lang.NumberFormatException if the number segments contain invalid numbers.
*/
public static long parseTimeString(final String time) {
String[] parts = time.split(":");
long result = 0;
int idx = 0;
if (parts.length == 3) {
// string has hours
result += Integer.valueOf(parts[idx]) * 3600000L;
idx++;
}
if (parts.length >= 2) {
result += Integer.valueOf(parts[idx]) * 60000L;
idx++;
result += (Float.valueOf(parts[idx])) * 1000L;
}
return result;
}
public static String formatRFC822Date(Date date) {
SimpleDateFormat format = new SimpleDateFormat("dd MMM yy HH:mm:ss Z", Locale.US);
return format.format(date);
}
public static String formatRFC3339Local(Date date) {
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ", Locale.US);
return format.format(date);
}
public static String formatRFC3339UTC(Date date) {
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'", Locale.US);
format.setTimeZone(defaultTimezone);
return format.format(date);
}
public static String formatAbbrev(final Context context, final Date date) {
GregorianCalendar cal = new GregorianCalendar();
cal.add(GregorianCalendar.YEAR, -1);
// some padding, because no one really remembers what day of the month it is
cal.add(GregorianCalendar.DAY_OF_MONTH, 10);
boolean withinLastYear = date.after(cal.getTime());
int format = android.text.format.DateUtils.FORMAT_ABBREV_ALL;
if(withinLastYear) {
format |= android.text.format.DateUtils.FORMAT_NO_YEAR;
}
return android.text.format.DateUtils.formatDateTime(context, date.getTime(), format);
}
}
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