/// <summary>
/// Constructs a method which gets the parameters list for the specified property.
/// </summary>
/// <param name="sb">The class writer.</param>
/// <param name="info">The property info.</param>
/// <param name="additionParameterMethods">The list of methods which return addition parameter names.</param>
/// <param name="classAddParams">True if the class has additional parameters method.</param>
private static void GetParametersMethod(
ClassWriter sb,
PropertyInfo info,
IReadOnlyCollection <string> additionParameterMethods,
bool classAddParams)
{
string VarToString((string Name, string Type) var)
{
return($"new CompiledVariable({SurroundInQuotes(var.Name)}, typeof({var.Type}))");
}
string?matchingAdditionalParamtersMethod =
additionParameterMethods.FirstOrDefault(x => x.Equals($"{ClassInfo.AdditionalParamtersMethodPrefix}{info.Name}"));
using var braces = sb.AddMethod(
new MethodDefinition($"GetParameters{info.Name}")
{
SummaryDoc = $"Gets all parameters which should be presented to the {info.Name} expression.",
ReturnsDoc = "All parameters needed by the expression.",
Access = AccessLevel.Public,
Type = "IList<CompiledVariable>",
});
sb.AppendLine($"List<CompiledVariable> parameters = new List<CompiledVariable> {{ {string.Join(", ", info.Variables.Select(VarToString))} }};");
if (matchingAdditionalParamtersMethod != null)
{
sb.AppendLine($"parameters.AddRange(this.{matchingAdditionalParamtersMethod}());");
}
if (classAddParams)
{
sb.AppendLine($"parameters.AddRange(this.Combined{ClassInfo.AdditionalParamtersForClassMethod}());");
}
// Reassign the parameters to have the reassigned types if needed.
sb.AppendLine("List<CompiledVariable> reassignedParameters = new List<CompiledVariable>();");
sb.AppendLine("var reassignments = this.CombinedVariableTypeReassignments();");
sb.AppendLine("foreach (var parm in parameters)");
sb.StartBrace();
sb.AppendLine("if (reassignments.TryGetValue(parm.Name, out Type? newType))");
sb.StartBrace();
sb.AppendLine("reassignedParameters.Add(new CompiledVariable(parm.Name, newType));");
sb.EndBrace();
sb.AppendLine("else");
sb.StartBrace();
sb.AppendLine("reassignedParameters.Add(parm);");
sb.EndBrace();
sb.EndBrace();
sb.AppendLine("return reassignedParameters;");
}
/// <summary>
/// Creates the method which activates all Lazy fields so compile everything.
/// </summary>
/// <param name="sb">The class writer.</param>
/// <param name="classInfo">The class info.</param>
private static void CompileMethod(ClassWriter sb, ClassInfo classInfo)
{
using var braces = sb.AddMethod(
new MethodDefinition("Compile")
{
Access = AccessLevel.Public,
Override = true,
});
sb.AppendLine("if (this.Compiler == null)");
sb.StartBrace();
sb.AppendLine("throw new InvalidOperationException(\"Definition must be attached before Compile is called.\");");
sb.EndBrace();
sb.AppendLine();
sb.AppendLine("base.Compile();");
foreach (PropertyInfo prop in classInfo.CompiledProps)
{
sb.AppendLine($"_ = this.compiledCondition{prop.Name}?.Value;");
}
foreach (PropertyInfo prop in classInfo.CompiledDictionaryProps)
{
sb.AppendLine($"this.compiledCondition{prop.Name}?.ToList().ForEach(x => _ = x.Value?.Value);");
}
foreach (var prop in classInfo.DefinitionProps)
{
sb.AppendLine($"this.{prop.Name}?.Compile();");
}
foreach (var prop in classInfo.DefinitionArrayProps)
{
sb.AppendLine($"foreach (var value in this.{prop.Name})");
sb.StartBrace();
sb.AppendLine($"value.Compile();");
sb.EndBrace();
sb.AppendLine();
}
foreach (var prop in classInfo.DefinitionDictionaryProps)
{
sb.AppendLine($"foreach (var value in this.{prop.Name})");
sb.StartBrace();
sb.AppendLine($"value.Value.Compile();");
sb.EndBrace();
sb.AppendLine();
}
}
/// <summary>
/// Creates the method which runs the condition evalulate method.
/// </summary>
/// <param name="sb">The class writer.</param>
/// <param name="info">The property info.</param>
/// <param name="additionParameterMethods">The list of additional parameter methods.</param>
/// <param name="classAddParams">True if the class has additional parameters method.</param>
private static void EvalDictionaryConditionMethod(
ClassWriter sb,
PropertyInfo info,
IReadOnlyCollection <string> additionParameterMethods,
bool classAddParams)
{
string?matchingAdditionalParamtersMethod =
additionParameterMethods.FirstOrDefault(x => x.Equals($"{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($\"{info.Name}{{key}}\", ex);");
sb.EndBrace();
}
/// <summary>
/// Adds the attach override to the source file.
/// </summary>
/// <param name="sb">The class writer.</param>
/// <param name="classInfo">The class info.</param>
private static void AttachMethod(ClassWriter sb, ClassInfo classInfo)
{
using var braces = sb.AddMethod(
new MethodDefinition("Attach")
{
Access = AccessLevel.Public,
Override = true,
Parameters = new ParamDef[]
{
new ParamDef("IConditionCompiler", "compiler", "The condition compiler."),
new ParamDef("BaseDefinition?", "upsteamDefinition", "null", "The upstream definition."),
},
});
sb.AppendLine("base.Attach(compiler, upsteamDefinition);");
foreach (var prop in classInfo.CompiledProps)
{
sb.AppendLine($"if (this.{prop.Name} != null)");
sb.StartBrace();
sb.AppendLine($"this.compiledCondition{prop.Name} = ");
sb.AppendLine($" new Lazy<ICompiledCondition<{prop.ReturnType}>>(() => this.CreateCondition<{prop.ReturnType}>(this.{prop.Name}, {prop.AsFormattedText.ToString().ToLower()}, this.{prop.Name}_IsComplex, this.GetParameters{prop.Name}()));");
sb.EndBrace();
}
foreach (var prop in classInfo.CompiledDictionaryProps)
{
sb.AppendLine($"foreach (var entry in this.{prop.Name})");
sb.StartBrace();
sb.AppendLine($"if (this.{prop.Name}[entry.Key] != null)");
sb.StartBrace();
sb.AppendLine($"this.compiledCondition{prop.Name}[entry.Key] = ");
sb.AppendLine($" new Lazy<ICompiledCondition<{prop.ReturnType}>>(() => this.CreateCondition<{prop.ReturnType}>(this.{prop.Name}[entry.Key], {prop.AsFormattedText.ToString().ToLower()}, this.{prop.Name}_IsComplex, this.GetParameters{prop.Name}()));");
sb.EndBrace();
sb.EndBrace();
sb.AppendLine();
}
foreach (var prop in classInfo.DefinitionProps)
{
sb.AppendLine($"this.{prop.Name}?.Attach(compiler, this);");
}
foreach (var prop in classInfo.DefinitionArrayProps)
{
sb.AppendLine($"foreach (var value in this.{prop.Name})");
sb.StartBrace();
sb.AppendLine($"value.Attach(compiler, this);");
sb.EndBrace();
sb.AppendLine();
}
foreach (var prop in classInfo.DefinitionDictionaryProps)
{
sb.AppendLine($"foreach (var value in this.{prop.Name})");
sb.StartBrace();
sb.AppendLine($"value.Value.Attach(compiler, this);");
sb.EndBrace();
sb.AppendLine();
}
}