private static PlaceholderGenerator getPlaceholderGenerator(string prefix, Variable[] variables)
{
if (prefix == "+")
{
return new PlaceholderGenerator(variables) { AreReservedCharactersAllowed = true };
}
else if (prefix == "#")
{
return new PlaceholderGenerator(variables) { Prefix = "#", AreReservedCharactersAllowed = true };
}
else if (prefix == ".")
{
return new PlaceholderGenerator(variables) { Prefix = ".", Separator = "." };
}
else if (prefix == "/")
{
return new PlaceholderGenerator(variables) { Prefix = "/", Separator = "/" };
}
else if (prefix == ";")
{
return new PlaceholderGenerator(variables) { Prefix = ";", Separator = ";", IsQualified = true };
}
else if (prefix == "?")
{
return new PlaceholderGenerator(variables) { Prefix = "?", Separator = "&", IsQualified = true, IsQualifiedWhenEmpty = true };
}
else if (prefix == "&")
{
return new PlaceholderGenerator(variables) { Prefix = "&", Separator = "&", IsQualified = true, IsQualifiedWhenEmpty = true };
}
else
{
return new PlaceholderGenerator(variables);
}
}
private object escape(Variable variable, object value)
{
if (value == null)
{
return null;
}
var pair = value as Tuple<string, object>;
if (pair != null)
{
string pairKey = escape(variable, pair.Item1);
string unescaped = pair.Item2 == null ? null : pair.Item2.ToString();
string pairValue = escape(variable, unescaped);
return new Tuple<string, string>(pairKey, pairValue);
}
return escape(variable, value.ToString());
}
private string escape(Variable variable, string value)
{
if (value == null)
{
return null;
}
if (variable.MaxLength < value.Length)
{
value = value.Substring(0, variable.MaxLength.Value);
}
if (AreReservedCharactersAllowed)
{
return value.Replace(" ", "+");
}
else
{
return WebUtility.UrlEncode(value);
}
}
private string qualify(Variable variable, object value)
{
var pair = value as Tuple<string, string>;
if (pair != null)
{
return pair.Item1 + "=" + pair.Item2;
}
string stringValue = value as String;
if (stringValue == null)
{
return null;
}
if (!IsQualified)
{
return stringValue;
}
if (!IsQualifiedWhenEmpty && String.IsNullOrWhiteSpace(stringValue))
{
return variable.Name;
}
return variable.Name + "=" + stringValue;
}
private object[] getSubstitutions(Variable variable, IProperty property)
{
var values = getParameterValues(variable, property);
var parts = values.Select(v => escape(variable, v)).ToArray();
if (variable.IsExploded)
{
return parts;
}
else
{
string combined = String.Join(",", parts);
return new object[] { combined };
}
}
private IEnumerable<object> getParameterValues(Variable variable, IProperty property)
{
return PropertyLookup.GetValues(property, variable.IsExploded);
}