async Task <object[]> GetTotalSummariesAsync(GetSummariesAsyncEventArgs e)
{
IssueFilter filter = IssuesHelper.MakeIssueFilter(e.Filter);
var summaryValues = await IssuesService.GetSummariesAsync(filter);
return(e.Summaries.Select(x => {
if (x.SummaryType == SummaryType.Count)
{
return (object)summaryValues.Count;
}
throw new InvalidOperationException();
}).ToArray());
}
async Task <FetchRowsResult> FetchRowsAsync(FetchRowsAsyncEventArgs e)
{
IssueSortOrder sortOrder = IssuesHelper.GetIssueSortOrder(e);
IssueFilter filter = IssuesHelper.MakeIssueFilter(e.Filter);
const int pageSize = 30;
var issues = await IssuesService.GetIssuesAsync(
page : e.Skip / pageSize,
pageSize : pageSize,
sortOrder : sortOrder,
filter : filter);
return(new FetchRowsResult(issues, hasMoreRows: issues.Length == pageSize));
}
public static IEnumerable <IssueData> FilterIssues(IssueFilter filter, IEnumerable <IssueData> issues)
{
if (filter == null)
{
return(issues);
}
issues = issues.Where(x => {
return((!filter.CreatedFrom.HasValue || x.Created >= filter.CreatedFrom.Value) &&
(!filter.CreatedTo.HasValue || x.Created <= filter.CreatedTo.Value) &&
(!filter.MinVotes.HasValue || x.Votes >= filter.MinVotes.Value) &&
(!filter.MaxVotes.HasValue || x.Votes <= filter.MaxVotes.Value) &&
(!filter.Priority.HasValue || x.Priority == filter.Priority.Value) &&
(filter.User == null || x.User == filter.User));
});
return(issues);
}
public async static Task <IssuesSummaries> GetSummariesAsync(IssueFilter filter)
{
return(await Task.Run(() => {
return new IssuesSummaries(count: IssuesHelper.FilterIssues(filter, AllIssues.Value).Count());
}));
}
public async static Task <IssueData[]> GetIssuesAsync(int page, int pageSize, IssueSortOrder sortOrder, IssueFilter filter)
{
return(await Task.Run(() => {
var issues = IssuesHelper.SortIssues(sortOrder, AllIssues.Value);
if (filter != null)
{
issues = IssuesHelper.FilterIssues(filter, issues);
}
issues = issues.Skip(page *pageSize).Take(pageSize);
return issues.ToArray();
}));
}
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)
));
}