internal static void ValidateNewRestrictions(this IHasRestrictions entity)
{
if (entity == null)
{
return;
}
if ((entity.MinAge ?? 0) > (entity.MaxAge ?? 100))
{
throw new Exception($"The Min. Age [{entity.MinAge}] is greater than the Max. Age [{entity.MaxAge}].");
}
if ((entity.MinGrade != GradeLevels.NotSet) && (entity.MaxGrade != GradeLevels.NotSet) && entity.MinGrade > entity.MinGrade)
{
throw new Exception($"The Min. Grade [{entity.MinGrade}] is greater than the Max. Grade [{entity.MaxGrade}].");
}
}
internal static bool CanCheckOut(this IHasRestrictions volume, int?age = null, GradeLevels grade = GradeLevels.NotSet)
{
if (volume.MinAge.HasValue && (age ?? 100) < volume.MinAge.Value)
{
return(false);
}
if (volume.MaxAge.HasValue && (age ?? 0) > volume.MaxAge.Value)
{
return(false);
}
if (volume.MinGrade != GradeLevels.NotSet && grade != GradeLevels.NotSet && volume.MinGrade > grade)
{
return(false);
}
if (volume.MaxGrade != GradeLevels.NotSet && grade != GradeLevels.NotSet && volume.MaxGrade < grade)
{
return(false);
}
return(true);
}
internal static bool CanCheckOut(this IHasRestrictions volume, IPatron patron)
{
if (volume == null || patron == null)
{
return(false);
}
if (volume.MinAge.HasValue && patron.MaxAge.HasValue)
{
if (patron.MaxAge < volume.MinAge)
{
return(false);
}
}
if (volume.MaxAge.HasValue && patron.MinAge.HasValue)
{
if (patron.MinAge > volume.MaxAge)
{
return(false);
}
}
if (volume.MinGrade != GradeLevels.NotSet && patron.MaxGrade != GradeLevels.NotSet)
{
if (patron.MaxGrade < volume.MinGrade)
{
return(false);
}
}
if (volume.MaxGrade != GradeLevels.NotSet && patron.MinGrade != GradeLevels.NotSet)
{
if (patron.MinGrade > volume.MaxGrade)
{
return(false);
}
}
return(volume.CanCheckOut(patron.Age, patron.Grade));
}
