/// <summary>
/// Renders a <c>!FindInMap</c> to a lookup on <c>locals.mappings</c>
/// </summary>
/// <param name="findInMapIntrinsic">The <see href="https://fireflycons.github.io/Firefly.CloudFormationParser/api/Firefly.CloudFormationParser.Intrinsics.Functions.FindInMapIntrinsic.html"><c>FindInMap</c></see> intrinsic to render.</param>
/// <param name="template">The <see href="https://fireflycons.github.io/Firefly.CloudFormationParser/api/Firefly.CloudFormationParser.ITemplate.html">imported template</see>.</param>
/// <param name="resource">The related new terraform resource where this map lookup TODO might need to be all imported resources</param>
/// <param name="inputs">The list of input variables and data sources.</param>
/// <param name="index">Index of second level key item to return, when this is an array</param>
/// <returns>A <see cref="MapReference"/>.</returns>
private static Reference Render(
FindInMapIntrinsic findInMapIntrinsic,
ITemplate template,
ResourceMapping resource,
IList <InputVariable> inputs,
int index)
{
var sb = new StringBuilder();
var mapParts = new Stack <string>();
mapParts.Push("local");
mapParts.Push("mappings");
foreach (var property in new[]
{
findInMapIntrinsic.MapName, findInMapIntrinsic.TopLevelKey,
findInMapIntrinsic.SecondLevelKey
})
{
switch (property)
{
case string s:
sb.Append($".{s}");
break;
case RefIntrinsic refIntrinsic:
sb.Append($"[{refIntrinsic.Render(template, resource, inputs)}]");
break;
case IIntrinsic intrinsic:
throw new InvalidOperationException($"Intrinsic \"{intrinsic.TagName}\" cannot be resolved.");
}
}
if (index > -1)
{
sb.Append($"[{index}]");
}
return(new MapReference(sb.ToString()));
}
public void FindInMapWithRefAtTopKeyRendersASExpectedLocalLookup()
{
var pseudo = "AWS::AccountId";
var expected = "local.mappings.MapName[data.aws_caller_identity.current.account_id].SecondKey";
var parameter = new Mock <IParameter>();
parameter.Setup(p => p.Name).Returns(pseudo);
var template = new Mock <ITemplate>();
template.Setup(t => t.Parameters).Returns(new List <IParameter>());
template.Setup(t => t.PseudoParameters).Returns(new List <IParameter> {
parameter.Object
});
var @ref = new RefIntrinsic(pseudo);
var findInMap = new FindInMapIntrinsic(new object[] { "MapName", @ref, "SecondKey" });
findInMap.Render(template.Object, (ResourceMapping)null, null).ReferenceExpression.Should().Be(expected);
}
