public ReportsPageViewModel(IViewModelHost host)
: base(host)
{
// setup...
this.Items = new ObservableCollection<ReportViewItem>();
this.SelectedItems = new List<ReportViewItem>();
// commands...
this.RefreshCommand = new DelegateCommand(async (e) =>
{
this.Host.HideAppBar();
await this.DoRefresh(true);
// toast...
string message = "I found 1 report.";
if (this.Items.Count != 1)
message = string.Format("I found {0} reports.", this.Items.Count);
var toast = new ToastNotificationBuilder(new string[] { "Reports refreshed.", message });
toast.ImageUri = "ms-appx:///Assets/Toast.jpg";
toast.Update();
});
// update any selection that we were given...
this.SelectionCommand = new DelegateCommand((args) =>
{
// update the selection...
this.SelectedItems.Clear();
foreach (ReportViewItem item in (IEnumerable<object>)args)
this.SelectedItems.Add(item);
// raise...
this.OnPropertyChanged("SelectedItems");
this.OnPropertyChanged("HasSelectedItems");
});
// dump the state...
this.DumpSelectionCommand = new DelegateCommand(async (e) =>
{
if (this.SelectedItems.Count > 0)
{
var builder = new StringBuilder();
foreach (var item in this.SelectedItems)
{
if (builder.Length > 0)
builder.Append("\r\n");
builder.Append(item.Title);
}
// show...
await this.Host.ShowAlertAsync(builder.ToString());
}
else
await this.Host.ShowAlertAsync("(No selection)");
});
}
private async Task SearchAsync(string queryText)
{
// flag...
this.SearchDone = true;
// set...
this.QueryText = queryText;
// set the narrative...
if (string.IsNullOrEmpty(queryText))
this.QueryNarrative = string.Empty;
else
this.QueryNarrative = string.Format("Results for '{0}'", queryText);
// load...
var reports = await ReportItem.SearchCacheAsync(queryText);
this.MasterItems.Clear();
foreach (var report in reports)
this.MasterItems.Add(new ReportViewItem(report));
// what was our selected filter?
var current = this.ActiveFilter;
if (current != null)
{
var builder = new ToastNotificationBuilder(current.Description);
builder.Update();
}
// do we have anything?
this.Filters.Clear();
if (this.MasterItems.Any())
{
// all filter...
var allFilter = new SearchFilter("all", this.MasterItems.Count, null, false);
allFilter.SelectionCommand = new DelegateCommand(async (args) => await HandleFilterActivatedAsync(allFilter));
this.Filters.Add(allFilter);
// build up a list of nouns...
var nouns = new Dictionary<string, int>();
var regex = new Regex(@"\b\w+$", RegexOptions.Singleline | RegexOptions.IgnoreCase);
foreach (var report in reports)
{
var match = regex.Match(report.Title);
// word...
string noun = match.Value.ToLower();
if (!(nouns.ContainsKey(noun)))
nouns[noun] = 0;
nouns[noun]++;
}
// add the filters...
foreach (var noun in nouns.Keys)
{
var filter = new SearchFilter(noun, nouns[noun], noun);
filter.SelectionCommand = new DelegateCommand(async (args) => await HandleFilterActivatedAsync(filter));
this.Filters.Add(filter);
}
// update...
var manager = new ReportImageCacheManager();
foreach (var report in this.MasterItems)
await report.InitializeAsync(manager);
}
// do we need to select the filter?
var lastQuery = await SettingItem.GetValueAsync(LastQueryKey);
if (lastQuery == queryText)
{
// select the filter...
var lastFilterName = await SettingItem.GetValueAsync(LastFilterKey);
if (!(string.IsNullOrEmpty(lastFilterName)))
ActivateFilter(lastFilterName);
}
else
{
// update...
await SettingItem.SetValueAsync(LastQueryKey, queryText);
}
// apply the filter...
this.ApplyFilter();
}
