static async Task <FetchRowsResult> FetchRowsAsync(FetchPageAsyncEventArgs e)
{
IssueSortOrder sortOrder = GetIssueSortOrder(e);
IssueFilter filter = MakeIssueFilter(e.Filter);
var issues = await IssuesService.GetIssuesAsync(
page : e.Skip / e.Take,
pageSize : e.Take,
sortOrder : sortOrder,
filter : filter);
return(new FetchRowsResult(issues, hasMoreRows: issues.Length == e.Take));
}
public async static Task <IssuesSummaries> GetSummariesAsync(IssueFilter filter)
{
await Task.Delay(300);
var issues = (IEnumerable <IssueData>)AllIssues.Value;
if (filter != null)
{
issues = FilterIssues(filter, issues);
}
var lastCreated = issues.Any() ? issues.Max(x => x.Created) : default(DateTime?);
return(new IssuesSummaries(count: issues.Count(), lastCreated: lastCreated));
}
static async Task <object[]> GetTotalSummariesAsync(GetSummariesAsyncEventArgs e)
{
IssueFilter filter = MakeIssueFilter(e.Filter);
var summaryValues = await IssuesService.GetSummariesAsync(filter);
return(e.Summaries.Select(x => {
if (x.SummaryType == SummaryType.Count)
{
return (object)summaryValues.Count;
}
if (x.SummaryType == SummaryType.Max && x.PropertyName == "Created")
{
return summaryValues.LastCreated;
}
throw new InvalidOperationException();
}).ToArray());
}
static IEnumerable <IssueData> FilterIssues(IssueFilter filter, IEnumerable <IssueData> issues)
{
if (filter.CreatedFrom != null || filter.CreatedTo != null)
{
if (filter.CreatedFrom == null || filter.CreatedTo == null)
{
throw new InvalidOperationException();
}
issues = issues.Where(x => x.Created >= filter.CreatedFrom.Value && x.Created < filter.CreatedTo);
}
if (filter.MinVotes != null)
{
issues = issues.Where(x => x.Votes >= filter.MinVotes.Value);
}
if (filter.Priority != null)
{
issues = issues.Where(x => x.Priority == filter.Priority);
}
return(issues);
}
public async static Task <IssueData[]> GetIssuesAsync(int page, int pageSize, IssueSortOrder sortOrder, IssueFilter filter)
{
await Task.Delay(300);
var issues = SortIssues(sortOrder, AllIssues.Value);
if (filter != null)
{
issues = FilterIssues(filter, issues);
}
return(issues.Skip(page * pageSize).Take(pageSize).ToArray());
}