/// <summary>
/// Filters this route's dataset by a parameter value
/// </summary>
/// <param name="property">An expression getting the property to filter for</param>
/// <param name="retriever">A function that will get the value of the parameter for a given request</param>
/// <typeparam name="T">The type of the parameter to filter with</typeparam>
/// <returns>This <see cref="RestModelOptionsBuilder{TModel, TUser}" /> object, for chaining</returns>
public RestModelOptionsBuilder <TModel, TUser> FilterByParameterEqual <T>(Expression <Func <TModel, T> > property, ParameterRetriever retriever)
{
PropertyInfo Info = RestModelOptionsBuilder <TModel, TUser> .ExtractProperty(property);
ParameterExpression ModelParameter = Expression.Parameter(typeof(TModel));
MemberExpression PropertyExpression = Expression.Property(ModelParameter, Info);
Type PropertyType = typeof(T);
this.Filter(
(c, d) => {
string?ParamValue = retriever.GetValue(c.Request);
if (ParamValue == null)
{
throw new ConditionFailedException("Failed to parse request parameter");
}
T Parsed = (T)ParameterResolver.ParseParameter(ParamValue, PropertyType);
// ModelParameter.Property == ParamValue
Expression ComparisonExpression = Expression.Equal(PropertyExpression, Expression.Constant(Parsed));
// and create the lambda
Expression <Func <TModel, bool> > FilterExpression =
Expression.Lambda <Func <TModel, bool> >(ComparisonExpression, ModelParameter);
return(d.Where(FilterExpression));
});
return(this);
}
/// <summary>
/// Sets a value obtained from a query parameter on parsed models before the operation occurs. The name of the route value is inferred from camelCasing the property name.
/// </summary>
/// <param name="property">The property to set the value on</param>
/// <returns>This <see cref="RestModelOptionsBuilder{TModel, TUser}" /> object, for chaining</returns>
public RestModelOptionsBuilder <TModel, TUser> SetValueQuery(
Expression <Func <TModel, object?> > property) =>
this.SetValueQuery(RestModelOptionsBuilder <TModel, TUser> .ExtractProperty(property));
/// <summary>
/// Sets a value on parsed models before the operation occurs.
/// </summary>
/// <param name="property">The property to set the value on</param>
/// <param name="retriever">A parameter retriever to use to get the value for a request</param>
/// <returns>This <see cref="RestModelOptionsBuilder{TModel, TUser}" /> object, for chaining</returns>
public RestModelOptionsBuilder <TModel, TUser> SetValue(
Expression <Func <TModel, object?> > property,
ParameterRetriever retriever) =>
this.SetValue(RestModelOptionsBuilder <TModel, TUser> .ExtractProperty(property), retriever);
/// <summary>
/// Sets a value obtained from a route value on parsed models before the operation occurs.
/// </summary>
/// <param name="property">The property to set the value on</param>
/// <param name="parameterName">The name of the route value whose value <paramref name="property" /> will be set to</param>
/// <returns>This <see cref="RestModelOptionsBuilder{TModel, TUser}" /> object, for chaining</returns>
public RestModelOptionsBuilder <TModel, TUser> SetValueRoute(
Expression <Func <TModel, object?> > property,
string parameterName) =>
this.SetValueRoute(RestModelOptionsBuilder <TModel, TUser> .ExtractProperty(property), parameterName);
/// <summary>
/// Sets a value on parsed models before the operation occurs.
/// </summary>
/// <param name="property">The property to set the value on</param>
/// <param name="valueGetter">A handler to use to get the value when requested</param>
/// <returns>This <see cref="RestModelOptionsBuilder{TModel, TUser}" /> object, for chaining</returns>
public RestModelOptionsBuilder <TModel, TUser> SetValueAsync(
Expression <Func <TModel, object> > property,
Func <IApiContext <TModel, TUser>, Task <object?> > valueGetter) =>
this.SetValueAsync(RestModelOptionsBuilder <TModel, TUser> .ExtractProperty(property), valueGetter);