/// <summary>
/// Reads all the Log Entries.
/// </summary>
/// <returns>The Entries.</returns>
public static List <LogEntry> ReadEntries(string groupName)
{
string content = Tools.LoadFile(SueetieSettings.LogFile(groupName).Replace("\r", ""));
List <LogEntry> result = new List <LogEntry>(50);
string[] lines = content.Split(new char[] { '\n' }, StringSplitOptions.RemoveEmptyEntries);
string[] fields;
for (int i = 0; i < lines.Length; i++)
{
fields = lines[i].Split('|');
try
{
// Try/catch to avoid problems with corrupted file (raw method)
result.Add(new LogEntry(EntryTypeParse(fields[0]), DateTime.Parse(fields[1]), Resanitize(fields[2]), Resanitize(fields[3])));
}
catch { }
}
result.Reverse();
return(result);
}
/// <summary>
/// Writes an Entry in the Log.
/// </summary>
/// <param name="message">The Message.</param>
/// <param name="type">The Type of the Entry.</param>
/// <param name="user">The User that generated the Entry.</param>
public static void LogEntry(string message, EntryType type, string user, string groupName)
{
message = Sanitize(message);
user = Sanitize(user);
FileStream fs = null;
// Since the Log is the most accessed file, the # of access tries has been doubled
for (int i = 0; i < FileAccessTries * 2; i++)
{
try {
fs = new FileStream(SueetieSettings.LogFile(groupName), FileMode.Append, FileAccess.Write, FileShare.None);
break;
}
catch {
Thread.Sleep(FileAccessTryDelay);
}
}
if (fs == null)
{
throw new IOException("Unable to open the file: " + SueetieSettings.LogFile(groupName));
}
StreamWriter sw = new StreamWriter(fs, System.Text.UTF8Encoding.UTF8);
// Type | DateTime | Message | User
try {
sw.Write(EntryTypeToString(type) + "|" + string.Format("{0:yyyy'/'MM'/'dd' 'HH':'mm':'ss}", DateTime.Now) + "|" + message + "|" + user + "\r\n");
}
catch { }
sw.Close();
FileInfo fi = new FileInfo(SueetieSettings.LogFile(groupName));
if (fi.Length > (long)(MaxLogSize * 1024))
{
CutLog(groupName);
}
}
private static void CutLog(string groupName)
{
// Contains the log messages from the newest to the oldest
List <LogEntry> entries = ReadEntries(groupName);
// Estimate the size of each entry at 80 chars
FileInfo fi = new FileInfo(SueetieSettings.LogFile(groupName));
long size = fi.Length;
int difference = (int)(size - (long)(MaxLogSize * 1024));
int removeEntries = difference / 80 * 2; // Double the number of remove entries in order to reduce the # of times Cut is needed
int preserve = entries.Count - removeEntries; // The number of entries to be preserved
// Copy the entries to preserve in a temp list
List <LogEntry> toStore = new List <LogEntry>();
for (int i = 0; i < preserve; i++)
{
toStore.Add(entries[i]);
}
// Reverse the temp list because entries contains the log messages
// starting from the newest to the oldest
toStore.Reverse();
StringBuilder sb = new StringBuilder();
// Type | DateTime | Message | User
foreach (LogEntry e in toStore)
{
sb.Append(EntryTypeToString(e.EntryType));
sb.Append("|");
sb.Append(e.DateTime.ToString("yyyy'/'MM'/'dd' 'HH':'mm':'ss"));
sb.Append("|");
sb.Append(e.Message);
sb.Append("|");
sb.Append(e.User);
sb.Append("\r\n");
}
FileStream fs = null;
// Since the Log is the most accessed file, the # of access tries has been doubled
for (int i = 0; i < FileAccessTries * 2; i++)
{
try
{
fs = new FileStream(SueetieSettings.LogFile(groupName), FileMode.Create, FileAccess.Write, FileShare.None);
break;
}
catch
{
Thread.Sleep(FileAccessTryDelay);
}
}
if (fs == null)
{
throw new IOException("Unable to open the file: " + SueetieSettings.LogFile(groupName));
}
StreamWriter sw = new StreamWriter(fs, System.Text.UTF8Encoding.UTF8);
// Type | DateTime | Message | User
try
{
sw.Write(sb.ToString());
}
catch { }
sw.Close();
}