/// <summary>
/// Converts format to shift shards. Like convert "Its name is {name}" to <seealso cref="StringShiftShard"/> instance.
/// </summary>
/// <param name="format">The format.</param>
/// <returns>StringShiftShard.</returns>
public static StringShiftShard ConvertFormatToShiftShard(this string format)
{
if (string.IsNullOrWhiteSpace(format))
{
return(null);
}
var matches = placeHolderRegex.Matches(format);
StringShiftShard result = new StringShiftShard();
var lastStart = 0;
foreach (Match one in matches)
{
var staticPart = format.Substring(lastStart, one.Index - lastStart);
result.staticShards.Add(staticPart);
var holderKey = one.Result(holderKeyResult);
result.dynamicShards.Add(one.Result(holderKeyResult));
lastStart = lastStart + 2 + staticPart.Length + holderKey.Length;
}
result.staticShards.Add(format.Substring(lastStart, format.Length - lastStart));
return(result);
}
/// <summary>
/// Gets the string builder default capacity.
/// </summary>
/// <param name="shard">The shard.</param>
/// <returns>System.Int32.</returns>
internal static int GetStringBuilderDefaultCapacity(this StringShiftShard shard)
{
return(shard == null ? 0 : (shard.staticShards.Sum(x => x.Length) * 2));
}
/// <summary>
/// Creates the string builder.
/// </summary>
/// <param name="shard">The shard.</param>
/// <returns>StringBuilder.</returns>
internal static StringBuilder CreateStringBuilder(this StringShiftShard shard)
{
return(shard == null ? null : new StringBuilder(GetStringBuilderDefaultCapacity(shard)));
}
/// <summary>
/// Initializes a new instance of the <see cref="StringShifter" /> class.
/// </summary>
/// <param name="sourceFormat">The source format.</param>
/// <param name="destinationFormat">The destination format.</param>
/// <param name="sourceFormatConstraints">The source format constraints.</param>
public StringShifter(string sourceFormat, string destinationFormat, Dictionary <string, string> sourceFormatConstraints = null)
{
_sourceRegex = sourceFormat.ConvertFormatToRegex(sourceFormatConstraints, RegexOptions.Compiled | RegexOptions.IgnoreCase);
_destinationShiftShard = destinationFormat.ConvertFormatToShiftShard();
}
/// <summary>
/// Initializes a new instance of the <see cref="StringShifter" /> class.
/// </summary>
/// <param name="sourceFormat">The source format.</param>
/// <param name="destinationFormat">The destination format.</param>
/// <param name="sourceFormatConstraints">The source format constraints.</param>
public StringShifter(string sourceFormat, string destinationFormat, Dictionary<string, string> sourceFormatConstraints = null)
{
_sourceRegex = sourceFormat.ConvertFormatToRegex(sourceFormatConstraints, RegexOptions.Compiled | RegexOptions.IgnoreCase);
_destinationShiftShard = destinationFormat.ConvertFormatToShiftShard();
}