/// <summary>
/// Parses TimeZones and Rules from the files in the provided
/// Olson/TZ Database directory. The directory provided must be a valid TZ Database.
/// </summary>
/// <param name="directory">The valid directory to parse Rules and TimeZones from.</param>
public void ReadTZDirectory()
{
try
{
// Mapping from TZname to: id, Ccode, Cname.
var tzNameToInfo = ReadTabFiles();
TimeZones.BeginLoadData();
Rules.BeginLoadData();
Leaps.BeginLoadData();
foreach (OlsonFileInfo file in _olsonFiles.GetConsumingEnumerable())
{
if (!file.IsTabFile)
{
RaiseFileParsing(file);
string[] lines = File.ReadAllLines(file.FullName);
// Process items.
for (int i = 0; i < lines.Length; i++)
{
string line = lines[i].TrimStart();
if (!isCommentNullOrWhiteSpace(line))
{
string[] fields = ParseFields(line);
switch (fields[0])
{
case Rule.RULE_NAME:
{
short from = Rule.ParseStartYear(fields[Rule.FromIndex]);
short to = Rule.ParseEndYear(fields[Rule.ToIndex], from);
if (from > _curYear || to < _curYear)
{
continue;
}
// No parsing necessary.
string name = fields[Rule.NameIndex];
var rule = Rules.NewRow();
rule[1] = name;
rule[2] = Rule.ParseBias(fields[Rule.SaveIndex]);
rule[3] = from;
rule[4] = to;
rule[5] = Rule.ParseMonth(fields[Rule.InIndex]);
rule[6] = fields[Rule.OnIndex];
rule[7] = Rule.ParseTime(fields[Rule.AtIndex]);
rule[8] = Rule.ParseTimeType(ref fields[Rule.AtIndex]);
rule[9] = Rule.ParseAbrev(fields[Rule.LetterIndex]) ?? (object)System.DBNull.Value;
_ruleRows.Add(rule);
RaiseEntryParsed(null);
break;
}
case TimeZone.ZONE_NAME:
{
// First TZ.
int init = i;
// Count to last
do
{
i++;
} while (i < lines.Length && TimeZone.IsContinuation(lines[i]));
// If first was not the only...
if (i - init != 1)
{
string[] continuation = ParseFields(lines[--i].Trim());
// Continuation has a non-tab delimited date...
if (continuation.Length > 4 && int.Parse(continuation[3]) < _curYear)
{
continue;
}
System.Array.Copy(continuation, 0, fields, 2, continuation.Length);
}
else
{
if (fields.Length > 5 && int.Parse(fields[5]) < _curYear)
{
continue;
}
}
string name = TimeZone.ParseName(fields[TimeZone.NameIndex]);
string countryCode = null;
string countryName = null;
string coord = null;
string comments = null;
int id = 0;
string[] tokens;
if (tzNameToInfo.TryGetValue(name, out tokens))
{
id = System.Convert.ToInt32(tokens[0]);
countryCode = tokens[1];
countryName = tokens[2];
coord = tokens[3];
comments = tokens[4];
}
else
{
App.ExceptionLogger.LogLow(new System.Exception("OlsonParser.cs Ln 390:"
+ "Error attempting to get a TimeZone's iso/tab info."));
continue;
}
short bias = TimeZone.ParseBias(fields[TimeZone.GMTOffsetIndex]);
string ruleName = TimeZone.ParseRuleName(fields[TimeZone.RuleIndex]);
string tzAbrev = TimeZone.ParseTzAbrev(fields[TimeZone.FormatIndex]);
var timeZone = TimeZones.NewRow();
timeZone[0] = id;
timeZone[1] = name;
timeZone[2] = bias;
timeZone[3] = ruleName;
timeZone[4] = tzAbrev;
timeZone[5] = countryCode;
timeZone[6] = countryName;
timeZone[7] = comments;
timeZone[8] = coord;
TimeZoneLookupTable[name] = timeZone;
_timeZoneRows.Add(timeZone);
RaiseEntryParsed(null);
break;
}
case Link.LINK_NAME:
{
var link = new string[] { fields[Link.FromZoneNameIndex], fields[Link.ToZoneNameIndex] };
_links.Add(link);
RaiseEntryParsed(null);
break;
}
case Leap.LEAP_NAME:
{
var leap = Leaps.NewRow();
leap[1] = Leap.ParseYear(fields[Leap.YearIndex]);
leap[2] = fields[Leap.MonthIndex];
leap[3] = Leap.ParseDay(fields[Leap.DayIndex]);
leap[4] = Leap.ParseTime(fields[Leap.TimeIndex]);
leap[5] = Leap.ParseCorrection(fields[Leap.CorrectionIndex]);
leap[6] = Leap.ParseRs(fields[Leap.RsIndex]);
_leapRows.Add(leap);
RaiseEntryParsed(null);
break;
}
}
ParsedEntries++;
}
}
RaiseFileParsed(file);
}
}
// Adding all links to list of TimeZones.
foreach (string[] link in _links)
{
System.Data.DataRow from;
if (!TimeZoneLookupTable.TryGetValue(link[Link.FromZoneNameIndex], out from))
{
App.ExceptionLogger.LogLow(new System.Exception("OlsonParser.cs Ln 364: Error attempting to find the \"From\" TimeZone for the link:"
+ link[0].ToString()));
continue;
}
string toName = link[Link.ToZoneNameIndex];
System.Data.DataRow to = TimeZones.NewRow();
to[0] = ++_lastUID;
to[1] = toName;
to[2] = from[2];
to[3] = from[3];
to[4] = from[4];
to[5] = from[5];
to[6] = from[6];
to[7] = from[7];
to[8] = from[8];
if (!TimeZoneLookupTable.TryAdd(toName, to))
{
App.ExceptionLogger.LogLow(new System.Exception("OlsonParser.cs Ln 373: Error attempting to add the TimeZone for the link:"
+ link.ToString()));
continue;
}
try
{
_timeZoneRows.Add(to);
RaiseEntryParsed(null);
ParsedEntries++;
}
catch (System.Exception e)
{
App.ExceptionLogger.LogLow(e);
continue;
}
}
RaiseDirectoryParsed(Directory);
}
finally
{
TimeZones.EndLoadData();
Rules.EndLoadData();
Leaps.EndLoadData();
}
}