static IssueFilter MakeIssueFilter(CriteriaOperator filter)
{
return(filter.Match(
binary: (propertyName, value, type) => {
switch (propertyName)
{
case "Votes":
if (type == BinaryOperatorType.GreaterOrEqual)
{
return new IssueFilter(minVotes: (int)value);
}
if (type == BinaryOperatorType.LessOrEqual)
{
return new IssueFilter(maxVotes: (int)value);
}
throw new InvalidOperationException();
case "Created":
if (type == BinaryOperatorType.GreaterOrEqual)
{
return new IssueFilter(createdFrom: (DateTime)value);
}
if (type == BinaryOperatorType.Less)
{
return new IssueFilter(createdTo: (DateTime)value);
}
throw new InvalidOperationException();
case "Tags":
if (type == BinaryOperatorType.Equal)
{
return new IssueFilter(tag: (string)value);
}
throw new InvalidOperationException();
default:
throw new InvalidOperationException();
}
},
and: filters => {
return new IssueFilter(
createdFrom: filters.Select(x => x.CreatedFrom).SingleOrDefault(x => x != null),
createdTo: filters.Select(x => x.CreatedTo).SingleOrDefault(x => x != null),
minVotes: filters.Select(x => x.MinVotes).SingleOrDefault(x => x != null),
maxVotes: filters.Select(x => x.MaxVotes).SingleOrDefault(x => x != null),
tag: filters.Select(x => x.Tag).SingleOrDefault(x => x != null)
);
},
@null: default(IssueFilter)
));
}
static IssueFilter MakeIssueFilter(CriteriaOperator filter)
{
return(filter.Match(
binary: (propertyName, value, type) => {
if (propertyName == "Votes" && type == BinaryOperatorType.GreaterOrEqual)
{
return new IssueFilter(minVotes: (int)value);
}
if (propertyName == "Priority" && type == BinaryOperatorType.Equal)
{
return new IssueFilter(priority: (Priority)value);
}
if (propertyName == "Created")
{
if (type == BinaryOperatorType.GreaterOrEqual)
{
return new IssueFilter(createdFrom: (DateTime)value);
}
if (type == BinaryOperatorType.Less)
{
return new IssueFilter(createdTo: (DateTime)value);
}
}
throw new InvalidOperationException();
},
and: filters => {
return new IssueFilter(
createdFrom: filters.Select(x => x.CreatedFrom).SingleOrDefault(x => x != null),
createdTo: filters.Select(x => x.CreatedTo).SingleOrDefault(x => x != null),
minVotes: filters.Select(x => x.MinVotes).SingleOrDefault(x => x != null),
priority: filters.Select(x => x.Priority).SingleOrDefault(x => x != null)
);
},
@null: default(IssueFilter)
));
}
public static IssueFilter MakeIssueFilter(CriteriaOperator filter)
{
return(filter.Match(
binary: (propertyName, value, type) => {
if (propertyName == "Votes")
{
int?_value = null;
if (value != null)
{
double v;
if (double.TryParse(value.ToString(), out v))
{
_value = (int)v;
}
}
switch (type)
{
case BinaryOperatorType.Greater:
return new IssueFilter(minVotes: _value == null ? 0 : (int)(double)_value + 1);
case BinaryOperatorType.GreaterOrEqual:
return new IssueFilter(minVotes: _value == null ? 0 : (int)(double)_value);
case BinaryOperatorType.Less:
return new IssueFilter(maxVotes: _value == null || (double)_value < 0 ? int.MaxValue : (int)(double)_value - 1);
case BinaryOperatorType.LessOrEqual:
return new IssueFilter(maxVotes: _value == null || (double)_value < 0 ? int.MaxValue : (int)(double)_value);
}
}
if (propertyName == "Created")
{
switch (type)
{
case BinaryOperatorType.Greater:
return new IssueFilter(createdFrom: value == null ? DateTime.MinValue : ((DateTime)value).AddTicks(1));
case BinaryOperatorType.GreaterOrEqual:
return new IssueFilter(createdFrom: value == null ? DateTime.MinValue : (DateTime)value);
case BinaryOperatorType.Less:
return new IssueFilter(createdTo: value == null ? DateTime.MaxValue : ((DateTime)value).AddTicks(-1));
case BinaryOperatorType.LessOrEqual:
return new IssueFilter(createdTo: value == null ? DateTime.MaxValue : (DateTime)value);
}
}
if (propertyName == "Priority" && type == BinaryOperatorType.Equal)
{
return new IssueFilter(priority: (Priority)value);
}
if (propertyName == "User" && type == BinaryOperatorType.Equal)
{
return new IssueFilter(user: (string)value);
}
throw new InvalidOperationException(string.Format("Can't convert '{0}' FilterCriteria to IssueFilter (type = '{1}', value = '{2}')", propertyName, type, value));
},
and: filters => {
var result = new IssueFilter(
priority: filters.Select(x => x.Priority).SingleOrDefault(x => x != null),
createdFrom: filters.Select(x => x.CreatedFrom).SingleOrDefault(x => x != null),
createdTo: filters.Select(x => x.CreatedTo).SingleOrDefault(x => x != null),
minVotes: filters.Select(x => x.MinVotes).SingleOrDefault(x => x != null),
maxVotes: filters.Select(x => x.MaxVotes).SingleOrDefault(x => x != null),
user: filters.Select(x => x.User).SingleOrDefault(x => x != null)
);
return result;
},
@null: default(IssueFilter)
));
}