internal static bool CompatibleRule <TFactRule, TWantAction, TFactContainer>(this TFactRule factRule, IVersionFact maxVersion, IWantActionContext <TWantAction, TFactContainer> context)
where TFactRule : IFactRule
where TWantAction : IWantAction
where TFactContainer : IFactContainer
{
var version = factRule.InputFactTypes.GetVersionFact(context);
if (version == null)
{
return(false);
}
return(maxVersion.CompareTo(version) >= 0);
}
/// <summary>
/// Checks the value of the version of the <paramref name="fact"/>.
/// </summary>
/// <typeparam name="TFact">Type fact.</typeparam>
/// <param name="fact">Fact.</param>
/// <param name="version">Version fact.</param>
/// <returns>Does the version match the fact of the <paramref name="version"/>?</returns>
public static bool HasVersionParameter <TFact>(this TFact fact, IVersionFact version)
where TFact : IFact
{
var factVersion = fact.FindVersionParameter();
if (version == null)
{
return(factVersion == null);
}
if (factVersion == null)
{
return(false);
}
return(version.CompareTo(factVersion) == 0);
}
/// <summary>
/// Checks if a fact contains a valid version.
/// </summary>
/// <typeparam name="TFact">Type fact.</typeparam>
/// <param name="fact">Fact.</param>
/// <param name="maxVersion">Max version (optional).</param>
/// <returns>Whether the version of the fact is within the valid versions?</returns>
public static bool IsRelevantFactByVersioned <TFact>(this TFact fact, IVersionFact maxVersion)
where TFact : IFact
{
if (maxVersion == null || !fact.IsCalculatedByRule())
{
return(true);
}
var value = fact.GetParameter(VersionedFactParametersCodes.Version)?.Value;
if (value == null)
{
return(false);
}
if (value is IVersionFact factVersion)
{
return(maxVersion.CompareTo(factVersion) >= 0);
}
return(false);
}
/// <summary>
/// Compares rules based on version facts.
/// </summary>
/// <typeparam name="TFactRule">Type rule.</typeparam>
/// <typeparam name="TWantAction">Type wantAction.</typeparam>
/// <typeparam name="TFactContainer">Type fact container.</typeparam>
/// <param name="x">First rule.</param>
/// <param name="y">Second rule.</param>
/// <param name="context">Context.</param>
/// <returns>
/// 1 - <paramref name="x"/> rule is greater than the <paramref name="y"/>,
/// 0 - <paramref name="x"/> rule is equal than the <paramref name="y"/>,
/// -1 - <paramref name="x"/> rule is less than the <paramref name="y"/>.
/// </returns>
public static int CompareByVersion <TFactRule, TWantAction, TFactContainer>(this TFactRule x, TFactRule y, IWantActionContext <TWantAction, TFactContainer> context)
where TFactRule : IFactRule
where TWantAction : IWantAction
where TFactContainer : IFactContainer
{
var xVersionType = x.InputFactTypes?.SingleOrDefault(type => type.IsFactType <IVersionFact>());
var yVersionType = y.InputFactTypes?.SingleOrDefault(type => type.IsFactType <IVersionFact>());
if (xVersionType == null)
{
return(yVersionType == null ? 0 : 1);
}
if (yVersionType == null)
{
return(-1);
}
IVersionFact xVersion = context.Container.FirstVersionFactByFactType(xVersionType, context.Cache);
IVersionFact yVersion = context.Container.FirstVersionFactByFactType(yVersionType, context.Cache);
return(xVersion.CompareTo(yVersion));
}
