/// <summary>
/// Returns a new <see cref="Rock.Model.AttendanceCode"/>
/// </summary>
/// <param name="codeLength">A <see cref="System.Int32"/> representing the length of the (security) code.</param>
/// <returns>A new <see cref="Rock.Model.AttendanceCode"/></returns>
public static AttendanceCode GetNew(int codeLength = 3)
{
string code = string.Empty;
var attendanceCode = new AttendanceCode();
var rockContext = new Rock.Data.RockContext();
var service = new AttendanceCodeService( rockContext );
// Make sure only one instance at a time is checking for unique code
lock (obj)
{
// Find a good unique code for today
while ( code == string.Empty ||
noGood.Any( s => s == code ) ||
service.Get( RockDateTime.Today, code ).Any() )
{
code = GenerateRandomCode( codeLength );
}
attendanceCode.IssueDateTime = RockDateTime.Now;
attendanceCode.Code = code;
service.Add( attendanceCode );
rockContext.SaveChanges();
}
return attendanceCode;
}
/// <summary>
/// Gets the new.
/// </summary>
/// <param name="alphaNumericLength">Length of the alpha numeric.</param>
/// <param name="alphaLength">Length of the alpha.</param>
/// <param name="numericLength">Length of the numeric.</param>
/// <param name="isRandomized">if set to <c>true</c> [is randomized].</param>
/// <returns></returns>
public static AttendanceCode GetNew(int alphaNumericLength, int alphaLength, int numericLength, bool isRandomized)
{
lock ( _obj )
{
using (var rockContext = new Rock.Data.RockContext())
{
var service = new AttendanceCodeService(rockContext);
DateTime today = RockDateTime.Today;
if (_todaysCodes == null || !_today.HasValue || !_today.Value.Equals(today))
{
_today = today;
DateTime tomorrow = today.AddDays(1);
_todaysCodes = service.Queryable().AsNoTracking()
.Where(c => c.IssueDateTime >= today && c.IssueDateTime < tomorrow)
.Select(c => c.Code)
.ToList();
}
// Find a good alphanumeric code prefix
string alphaNumericCode = string.Empty;
if (alphaNumericLength > 0 || alphaLength > 0)
{
alphaNumericCode =
(alphaNumericLength > 0 ? GenerateRandomCode(alphaNumericLength) : string.Empty) +
(alphaLength > 0 ? GenerateRandomAlphaCode(alphaLength) : string.Empty);
while (noGood.Any(s => alphaNumericCode.Contains(s)) || _todaysCodes.Contains(alphaNumericCode))
{
alphaNumericCode =
(alphaNumericLength > 0 ? GenerateRandomCode(alphaNumericLength) : string.Empty) +
(alphaLength > 0 ? GenerateRandomAlphaCode(alphaLength) : string.Empty);
}
}
string numericCode = string.Empty;
if (numericLength > 0)
{
int codeLen = alphaNumericLength + alphaLength + numericLength;
var lastCode = _todaysCodes.Where(c => c.Length == codeLen).OrderBy(c => c.Substring(alphaNumericLength + alphaLength)).LastOrDefault();
numericCode = GetNextNumericCodeAsString(alphaNumericLength, alphaLength, numericLength, isRandomized, lastCode);
}
string code = alphaNumericCode + numericCode;
_todaysCodes.Add(code);
var attendanceCode = new AttendanceCode();
attendanceCode.IssueDateTime = RockDateTime.Now;
attendanceCode.Code = code;
service.Add(attendanceCode);
rockContext.SaveChanges();
return(attendanceCode);
}
}
}
/// <summary>
/// Returns a new <see cref="Rock.Model.AttendanceCode"/> comprised of random alpha numeric characters.
/// </summary>
/// <param name="codeLength">A <see cref="System.Int32"/> representing the length of the (security) code.</param>
/// <returns>A new <see cref="Rock.Model.AttendanceCode"/></returns>
public static AttendanceCode GetNew(int codeLength = 3)
{
lock ( _obj )
{
using (var rockContext = new Rock.Data.RockContext())
{
var service = new AttendanceCodeService(rockContext);
DateTime today = RockDateTime.Today;
if (_todaysCodes == null || !_today.HasValue || !_today.Value.Equals(today))
{
_today = today;
DateTime tomorrow = today.AddDays(1);
_todaysCodes = service.Queryable().AsNoTracking()
.Where(c => c.IssueDateTime >= today && c.IssueDateTime < tomorrow)
.Select(c => c.Code)
.ToList();
}
// Find a good unique code for today
string code = GenerateRandomCode(codeLength);
while (noGood.Any(s => s == code) || _todaysCodes.Any(c => c == code))
{
code = GenerateRandomCode(codeLength);
}
_todaysCodes.Add(code);
var attendanceCode = new AttendanceCode();
attendanceCode.IssueDateTime = RockDateTime.Now;
attendanceCode.Code = code;
service.Add(attendanceCode);
rockContext.SaveChanges();
return(attendanceCode);
}
}
}
/// <summary>
/// Returns a new <see cref="Rock.Model.AttendanceCode"/>
/// </summary>
/// <param name="codeLength">A <see cref="System.Int32"/> representing the length of the (security) code.</param>
/// <returns>A new <see cref="Rock.Model.AttendanceCode"/></returns>
public static AttendanceCode GetNew( int codeLength = 3 )
{
lock ( _obj )
{
using ( var rockContext = new Rock.Data.RockContext() )
{
var service = new AttendanceCodeService( rockContext );
DateTime today = RockDateTime.Today;
if ( _todaysCodes == null || !_today.HasValue || !_today.Value.Equals( today ) )
{
_today = today;
DateTime tomorrow = today.AddDays( 1 );
_todaysCodes = service.Queryable().AsNoTracking()
.Where( c => c.IssueDateTime >= today && c.IssueDateTime < tomorrow )
.Select( c => c.Code )
.ToList();
}
// Find a good unique code for today
string code = GenerateRandomCode( codeLength );
while ( noGood.Any( s => s == code ) || _todaysCodes.Any( c => c == code ) )
{
code = GenerateRandomCode( codeLength );
}
_todaysCodes.Add( code );
var attendanceCode = new AttendanceCode();
attendanceCode.IssueDateTime = RockDateTime.Now;
attendanceCode.Code = code;
service.Add( attendanceCode );
rockContext.SaveChanges();
return attendanceCode;
}
}
}
/// <summary>
/// Returns a new <see cref="Rock.Model.AttendanceCode" /> with a specified number of alpha characters followed by
/// another specified number of numeric characters. The numeric character sequence will not repeat for "today" so
/// ensure that you're using a sufficient numericLength otherwise it will be unable to find a unique number.
/// Also note as the issued numeric codes reaches the maximum (from the set of possible), it will take longer and
/// longer to find an unused number.
/// </summary>
/// <param name="alphaLength">A <see cref="System.Int32"/> representing the length of the (alpha) portion of the code.</param>
/// <param name="numericLength">A <see cref="System.Int32"/> representing the length of the (digit) portion of the code.</param>
/// <param name="isRandomized">A <see cref="System.Boolean"/> that controls whether or not the AttendanceCodes should be generated randomly or in order (starting from the smallest).</param>
/// <returns>
/// A new <see cref="Rock.Model.AttendanceCode" />
/// </returns>
public static AttendanceCode GetNew(int alphaLength = 2, int numericLength = 4, bool isRandomized = true)
{
lock ( _obj )
{
using (var rockContext = new Rock.Data.RockContext())
{
var service = new AttendanceCodeService(rockContext);
DateTime today = RockDateTime.Today;
if (_todaysCodes == null || !_today.HasValue || !_today.Value.Equals(today))
{
_today = today;
DateTime tomorrow = today.AddDays(1);
_todaysCodes = service.Queryable().AsNoTracking()
.Where(c => c.IssueDateTime >= today && c.IssueDateTime < tomorrow)
.Select(c => c.Code)
.ToList();
}
// Find a good alpha code
string alphaCode = GenerateRandomAlphaCode(alphaLength);
while (noGood.Any(s => s == alphaCode))
{
alphaCode = GenerateRandomAlphaCode(alphaLength);
}
// Find a good unique numeric code for today
string numericCode = string.Empty;
if (isRandomized)
{
numericCode = GenerateRandomNumericCode(numericLength);
while (noGood.Any(s => s == numericCode) || _todaysCodes.Any(c => c.EndsWith(numericCode)))
{
numericCode = GenerateRandomNumericCode(numericLength);
}
}
else
{
var lastCode = _todaysCodes.OrderBy(c => c.Substring(alphaLength)).LastOrDefault();
if (lastCode != null)
{
var maxCode = lastCode.Substring(alphaLength);
numericCode = (maxCode.AsInteger() + 1).ToString("D" + numericLength);
}
else
{
numericCode = 0.ToString("D" + numericLength);
}
}
string code = alphaCode + numericCode;
_todaysCodes.Add(code);
var attendanceCode = new AttendanceCode();
attendanceCode.IssueDateTime = RockDateTime.Now;
attendanceCode.Code = code;
service.Add(attendanceCode);
rockContext.SaveChanges();
return(attendanceCode);
}
}
}
/// <summary>
/// Returns a new <see cref="Rock.Model.AttendanceCode" />. The code will contain the specified number of alphanumeric characters,
/// followed by the alpha characters and then the specified number of numeric characters. The character sequence will not repeat for "today".
/// Also the numeric character sequence will not repeat for "today". In both cases ensure that you're using a sufficient length for each
/// otherwise there will not be enough possible codes.
/// Also note as the issued numeric codes reaches the maximum (from the set of possible), it will take longer and
/// longer to find an unused number. So specifing a larger number of characters then needed will increase performance.
/// </summary>
/// <param name="alphaNumericLength">A <see cref="System.Int32"/> representing the length for a mixed alphanumberic code.</param>
/// <param name="alphaLength">A <see cref="System.Int32"/> representing the length of the (alpha) portion of the code.</param>
/// <param name="numericLength">A <see cref="System.Int32"/> representing the length of the (digit) portion of the code.</param>
/// <param name="isRandomized">A <see cref="System.Boolean"/> that controls whether or not the AttendanceCodes should be generated randomly or in order (starting from the smallest). Only effect the numeric code.</param>
/// <returns></returns>
public static AttendanceCode GetNew(int alphaNumericLength, int alphaLength, int numericLength, bool isRandomized)
{
lock ( _obj )
{
using (var rockContext = new Rock.Data.RockContext())
{
var service = new AttendanceCodeService(rockContext);
DateTime today = RockDateTime.Today;
if (_todaysUsedCodes == null || !_todaysDate.HasValue || !_todaysDate.Value.Equals(today))
{
_todaysDate = today;
DateTime tomorrow = today.AddDays(1);
_todaysUsedCodes = new HashSet <string>(service.Queryable().AsNoTracking().Where(c => c.IssueDateTime >= today && c.IssueDateTime < tomorrow).Select(c => c.Code).ToList());
}
string alphaNumericCode = string.Empty;
string alphaCode = string.Empty;
string numericCode = string.Empty;
string code = string.Empty;
string lastCode = string.Empty;
for (int attempts = 0; attempts <= _maxAttempts; attempts++)
{
if (attempts == _maxAttempts)
{
throw new TimeoutException("Too many attempts to create a unique attendance code. There is almost certainly a check-in system 'Security Code Length' configuration problem.");
}
if (alphaNumericLength > 0)
{
alphaNumericCode = GenerateRandomCode(alphaNumericLength);
}
if (alphaLength > 0)
{
alphaCode = GenerateRandomAlphaCode(alphaLength);
}
if (numericLength > 0)
{
int codeLen = alphaNumericLength + alphaLength + numericLength;
if (lastCode.IsNullOrWhiteSpace())
{
lastCode = _todaysUsedCodes.Where(c => c.Length == codeLen).OrderBy(c => c.Substring(alphaNumericLength + alphaLength)).LastOrDefault();
}
numericCode = GetNextNumericCodeAsString(alphaNumericLength, alphaLength, numericLength, isRandomized, lastCode);
}
code = alphaNumericCode + alphaCode + numericCode;
// Check if code is already in use or contains bad unallowed strings.
if (noGood.Any(s => code.Contains(s)) || _todaysUsedCodes.Contains(code))
{
lastCode = numericCode;
alphaNumericCode = string.Empty;
alphaCode = string.Empty;
numericCode = string.Empty;
code = string.Empty;
continue;
}
// When using a clustered environment we need to check the DB to make sure the code hasn't been assigned by another server
if (Rock.Utility.Settings.RockInstanceConfig.IsClustered)
{
if (service.IsCodeAlreadyInUse(code))
{
lastCode = numericCode;
alphaNumericCode = string.Empty;
alphaCode = string.Empty;
numericCode = string.Empty;
code = string.Empty;
continue;
}
}
// If we get to this point the code can be used
break;
}
_todaysUsedCodes.Add(code);
var attendanceCode = new AttendanceCode();
attendanceCode.IssueDateTime = RockDateTime.Now;
attendanceCode.Code = code;
service.Add(attendanceCode);
rockContext.SaveChanges();
return(attendanceCode);
}
}
}
/// <summary>
/// Gets the new.
/// </summary>
/// <param name="alphaNumericLength">Length of the alpha numeric.</param>
/// <param name="alphaLength">Length of the alpha.</param>
/// <param name="numericLength">Length of the numeric.</param>
/// <param name="isRandomized">if set to <c>true</c> [is randomized].</param>
/// <returns></returns>
public static AttendanceCode GetNew(int alphaNumericLength, int alphaLength, int numericLength, bool isRandomized)
{
lock ( _obj )
{
using (var rockContext = new Rock.Data.RockContext())
{
var service = new AttendanceCodeService(rockContext);
DateTime today = RockDateTime.Today;
if (_todaysCodes == null || !_today.HasValue || !_today.Value.Equals(today))
{
_today = today;
DateTime tomorrow = today.AddDays(1);
_todaysCodes = new HashSet <string>(service.Queryable().AsNoTracking()
.Where(c => c.IssueDateTime >= today && c.IssueDateTime < tomorrow)
.Select(c => c.Code)
.ToList());
}
// Find a good alphanumeric code prefix
string alphaNumericCode = string.Empty;
int attempts = 0;
if (alphaNumericLength > 0 || alphaLength > 0)
{
alphaNumericCode =
(alphaNumericLength > 0 ? GenerateRandomCode(alphaNumericLength) : string.Empty) +
(alphaLength > 0 ? GenerateRandomAlphaCode(alphaLength) : string.Empty);
while (noGood.Any(s => alphaNumericCode.Contains(s)) || _todaysCodes.Contains(alphaNumericCode))
{
attempts++;
// We're only going to attempt this 1 million times...
// Interestingly, even when this code approaches the maximum number of possible combinations
// it still typically takes less than 5000 attempts. However, if the number of
// attempts jumps over 10,000 there is almost certainly a problem with someone's
// check-in code configuration so we're going to stop after a million attempts.
if (attempts > 1000000)
{
throw new TimeoutException("Too many attempts to create a unique attendance code. There is almost certainly a check-in system 'Security Code Length' configuration problem.");
}
alphaNumericCode =
(alphaNumericLength > 0 ? GenerateRandomCode(alphaNumericLength) : string.Empty) +
(alphaLength > 0 ? GenerateRandomAlphaCode(alphaLength) : string.Empty);
}
}
string numericCode = string.Empty;
if (numericLength > 0)
{
int codeLen = alphaNumericLength + alphaLength + numericLength;
var lastCode = _todaysCodes.Where(c => c.Length == codeLen).OrderBy(c => c.Substring(alphaNumericLength + alphaLength)).LastOrDefault();
numericCode = GetNextNumericCodeAsString(alphaNumericLength, alphaLength, numericLength, isRandomized, lastCode);
}
string code = alphaNumericCode + numericCode;
_todaysCodes.Add(code);
var attendanceCode = new AttendanceCode();
attendanceCode.IssueDateTime = RockDateTime.Now;
attendanceCode.Code = code;
service.Add(attendanceCode);
rockContext.SaveChanges();
return(attendanceCode);
}
}
}
/// <summary>
/// Returns a new <see cref="Rock.Model.AttendanceCode" /> with a specified number of alpha characters followed by
/// another specified number of numeric characters. The numeric character sequence will not repeat for "today" so
/// ensure that you're using a sufficient numericLength otherwise it will be unable to find a unique number.
/// Also note as the issued numeric codes reaches the maximum (from the set of possible), it will take longer and
/// longer to find an unused number.
/// </summary>
/// <param name="alphaLength">A <see cref="System.Int32"/> representing the length of the (alpha) portion of the code.</param>
/// <param name="numericLength">A <see cref="System.Int32"/> representing the length of the (digit) portion of the code.</param>
/// <param name="isRandomized">A <see cref="System.Boolean"/> that controls whether or not the AttendanceCodes should be generated randomly or in order (starting from the smallest).</param>
/// <returns>
/// A new <see cref="Rock.Model.AttendanceCode" />
/// </returns>
public static AttendanceCode GetNew( int alphaLength = 2, int numericLength = 4, bool isRandomized = true )
{
lock ( _obj )
{
using ( var rockContext = new Rock.Data.RockContext() )
{
var service = new AttendanceCodeService( rockContext );
DateTime today = RockDateTime.Today;
if ( _todaysCodes == null || !_today.HasValue || !_today.Value.Equals( today ) )
{
_today = today;
DateTime tomorrow = today.AddDays( 1 );
_todaysCodes = service.Queryable().AsNoTracking()
.Where( c => c.IssueDateTime >= today && c.IssueDateTime < tomorrow )
.Select( c => c.Code )
.ToList();
}
// Find a good alpha code
string alphaCode = GenerateRandomAlphaCode( alphaLength );
while ( noGood.Any( s => s == alphaCode ) )
{
alphaCode = GenerateRandomAlphaCode( alphaLength );
}
// Find a good unique numeric code for today
string numericCode = string.Empty;
if ( isRandomized )
{
numericCode = GenerateRandomNumericCode( numericLength );
while ( noGood.Any( s => s == numericCode ) || _todaysCodes.Any( c => c.EndsWith( numericCode ) ) )
{
numericCode = GenerateRandomNumericCode( numericLength );
}
}
else
{
var lastCode = _todaysCodes.OrderBy( c => c.Substring( alphaLength ) ).LastOrDefault();
if ( lastCode != null )
{
var maxCode = lastCode.Substring( alphaLength );
numericCode = ( maxCode.AsInteger() + 1 ).ToString( "D" + numericLength );
}
else
{
numericCode = 0.ToString( "D" + numericLength );
}
}
string code = alphaCode + numericCode;
_todaysCodes.Add( code );
var attendanceCode = new AttendanceCode();
attendanceCode.IssueDateTime = RockDateTime.Now;
attendanceCode.Code = code;
service.Add( attendanceCode );
rockContext.SaveChanges();
return attendanceCode;
}
}
}