/// <summary>
/// Creates the method which runs the condition evalulate method.
/// </summary>
/// <param name="sb">The class writer.</param>
/// <param name="info">The property info.</param>
/// <param name="additionParameterMethods">The list of additional parameter methods.</param>
/// <param name="classAddParams">True if the class has additional parameters method.</param>
private static void EvalDictionaryConditionMethod(
ClassWriter sb,
PropertyInfo info,
IReadOnlyCollection <string> additionParameterMethods,
bool classAddParams)
{
string?matchingAdditionalParamtersMethod =
additionParameterMethods.FirstOrDefault(x => x.Equals($"{ClassInfo.AdditionalParamtersMethodPrefix}{info.Name}", StringComparison.Ordinal));
List <ParamDef> allParameters = new List <ParamDef>()
{
new ParamDef("string", "key", "The key, in the condition dictionary, to evaluate."),
new ParamDef("Random", "rdm", "The random number generator"),
};
allParameters.AddRange(info.Variables.Select(v =>
new ParamDef($"LegendsGenerator.Contracts.Things.BaseThing", v.Name, "One of the variables which will be passed to the compiled condition.")).ToList());
if (matchingAdditionalParamtersMethod != null || classAddParams)
{
allParameters.Add(new ParamDef(
"IDictionary<string, LegendsGenerator.Contracts.Things.BaseThing>",
"additionalParameters",
$"Additional parameters as defined by AdditionalParametersForClass and AdditionalParametersFor{info.Name} methods, or the upstream additional parameters."));
}
using var braces = sb.AddMethod(
new MethodDefinition($"Eval{info.Name}")
{
SummaryDoc = $"Evaluates the expressions in the {info.Name} property with the given parameters.",
ReturnsDoc = "The result of evaluation.",
Access = info.Protected ? AccessLevel.Protected : AccessLevel.Public,
Type = info.ReturnType,
Parameters = allParameters,
});
sb.AppendLine($"if (this.Compiler == null || this.compiledCondition{info.Name} == null)");
sb.StartBrace();
sb.AppendLine("throw new InvalidOperationException(\"Definition must be attached before any Eval method is called.\");");
sb.EndBrace();
sb.AppendLine();
sb.AddDictionary(
"Dictionary<string, LegendsGenerator.Contracts.Things.BaseThing>",
"param",
info.Variables.Select(x => x.Name).ToDictionary(x => x, x => x));
if (matchingAdditionalParamtersMethod != null || classAddParams)
{
sb.AppendLine("foreach(var additionalParameter in additionalParameters)");
sb.StartBrace();
sb.AppendLine("param[additionalParameter.Key] = additionalParameter.Value;");
sb.EndBrace();
sb.AppendLine();
}
sb.AppendLine("try");
sb.StartBrace();
sb.AppendLine($"return this.compiledCondition{info.Name}[key].Value.Evaluate(rdm, param);");
sb.EndBrace();
sb.AppendLine("catch (Exception ex)");
sb.StartBrace();
sb.AppendLine($"throw this.GetConditionException($\"{info.Name}{{key}}\", ex);");
sb.EndBrace();
}
