private void PerformVariableReplacement(StringBuilder builder, string text)
{
var start = 0;
var length = text.Length;
while (start < length)
{
var match = VariableRegex.Match(text, start);
if (!match.Success)
{
builder.Append(text, start, length - start);
return;
}
builder.Append(text, start, match.Index);
builder.Append(GetVariableReplacement(match));
start = match.Index + match.Length;
}
}
/// <summary>
/// Replaces the variable names with repective values in the supplied string.
/// </summary>
/// <param name="input">The string which to have the evaluation applied.</param>
/// <param name="hostVariables">The collection of variables to be queried.</param>
/// <returns>String</returns>
public static string EvaluateVariable(string input, Dictionary <string, string> hostVariables)
{
if (hostVariables != null && !string.IsNullOrWhiteSpace(input))
{
var match = VariableRegex.Match(input);
if (match.Success)
{
do
{
var key = match.Groups[1].Value;
if (hostVariables.ContainsKey(key))
{
input = input.Replace(match.Value, hostVariables[key]);
}
} while ((match = match.NextMatch()).Success);
}
}
return(input);
}
/// <summary>
///
/// </summary>
/// <param name="exogenous"
///
/// ></param>
/// <param name="sets">
///
/// </param>
/// <returns>
///
/// </returns>
private static IEnumerable <VariableDefinition> SetExogenousVariables(string exogenous, IEnumerable <KeyValuePair <string, IImmutableList <string> > > sets)
{
sets = sets as KeyValuePair <string, IImmutableList <string> >[] ?? sets.ToArray();
foreach (Match match in VariableRegex.Matches(exogenous))
{
VariableDefinition definition =
new VariableDefinition(
match.Groups["variable"].Value,
true,
match.Groups["indexes"]
.Captures
.Cast <Capture>()
.Where(y => y.Length > 0)
.Select(y => y.Value));
if (definition.Indexes.All(x => x.StartsWith("\"")))
{
yield return
(new VariableDefinition(
definition.Name,
definition.IsExogenous,
definition.Indexes.Select(x => x.Replace("\"", null).Replace(",", null))));
continue;
}
foreach (KeyValuePair <string, IImmutableList <string> > item in sets.Where(x => definition.Indexes.Contains(x.Key)))
{
foreach (string entry in item.Value)
{
yield return(new VariableDefinition(definition.Name, true, definition.Indexes.Replace(item.Key, entry).Select(x => x.Replace("\"", null).Replace(",", null))));
}
}
}
}
private static bool HasVariableReplacement(string text)
{
return(VariableRegex.IsMatch(text));
}
public static List <string> GetVariables(string documentPath)
{
return(string.IsNullOrWhiteSpace(documentPath) ? new List <string>() : VariableRegex.Matches(documentPath).OfType <Match>().Select(x => VariableNameRegex.Match(x.Value).Value.Trim()).ToList());
}
public static bool ContainsVariable(string text)
{
return(!string.IsNullOrWhiteSpace(text) && VariableRegex.IsMatch(text));
}
