/// <summary>
/// Replaces variables in paths with their values. Ex. ~/uploads/thumbs/<guid>.<ext>.
/// Standard variables are <ext> (the default extension for the final file type), <guid>, a randomly generated GUID,
/// <filename>, the original filename without it's extension, <path>, the original path and filename without extension,
/// <settings.width>, (any specified settings value except preset), <width> (final width), and <height> (final height).
///
/// </summary>
/// <param name="pathWithVars"></param>
/// <param name="resolver"></param>
/// <returns></returns>
public static string ResolveVariablesInPath(string pathWithVars, VariableResolverCallback resolver)
{
string p = pathWithVars;
while (p.IndexOf('<') > -1)
{
int start = p.IndexOf('<');
int stop = p.IndexOf('>', start);
int bugcheck = p.IndexOf('<', start + 1);
if (stop < 0 || (bugcheck > -1 && bugcheck < stop) || stop == start + 1)
{
throw new ImageProcessingException("Destination paths can only contain < and > in matched pairs to designate variables. Path \"" + pathWithVars + "\" has invalid syntax");
}
string varName = p.Substring(start + 1, stop - start - 1);
string filter = null;
//Split off the filter if present.
int filterIx = varName.IndexOf(':');
if (filterIx > 0)
{
filter = varName.Substring(filterIx + 1);
varName = varName.Substring(0, filterIx);
}
varName = varName.ToLowerInvariant();
string result = resolver(varName);
if (!string.IsNullOrEmpty(filter))
{
result = RemoveNonMatchingChars(result, filter);
}
if (result == null)
{
throw new ImageProcessingException("Invalid variable name \"" + varName + "\" in templated path \"" + pathWithVars + "\". The variable name may be mispelled, or the variable may not be available with the pipeline you are using.");
}
p = p.Substring(0, start) + result + p.Substring(stop + 1);
}
if (p.IndexOf('>') > -1)
{
throw new ImageProcessingException("Orphaned '>' in template path \"" + pathWithVars + "\".");
}
return(p);
}
/// <summary>
/// Replaces variables in paths with their values. Ex. ~/uploads/thumbs/<guid>.<ext>.
/// Standard variables are <ext> (the default extension for the final file type), <guid>, a randomly generated GUID,
/// <filename>, the original filename without it's extension, <path>, the original path and filename without extension,
/// <settings.width>, (any specified settings value except preset), <width> (final width), and <height> (final height).
///
/// </summary>
/// <param name="pathWithVars"></param>
/// <param name="resolver"></param>
/// <returns></returns>
public static string ResolveVariablesInPath(string pathWithVars, VariableResolverCallback resolver)
{
string p = pathWithVars;
while (p.IndexOf('<') > -1) {
int start = p.IndexOf('<');
int stop = p.IndexOf('>',start);
int bugcheck = p.IndexOf('<',start + 1);
if (stop < 0 || (bugcheck > -1 && bugcheck < stop) || stop == start + 1)
throw new ImageProcessingException("Destination paths can only contain < and > in matched pairs to designate variables. Path \"" + pathWithVars + "\" has invalid syntax");
string varName = p.Substring(start + 1,stop - start -1);
string filter = null;
//Split off the filter if present.
int filterIx = varName.IndexOf(':');
if (filterIx > 0) {
filter = varName.Substring(filterIx + 1);
varName = varName.Substring(0, filterIx);
}
varName = varName.ToLowerInvariant();
string result = resolver(varName);
if (!string.IsNullOrEmpty(filter)) {
result = RemoveNonMatchingChars(result, filter);
}
if (result == null)
throw new ImageProcessingException("Invalid variable name \"" + varName + "\" in templated path \"" + pathWithVars + "\". The variable name may be mispelled, or the variable may not be available with the pipeline you are using.");
p = p.Substring(0,start) + result + p.Substring(stop + 1);
}
if (p.IndexOf('>') > -1) throw new ImageProcessingException("Orphaned '>' in template path \"" + pathWithVars + "\".");
return p;
}
