protected override void ProcessCore(TagHelperContext context, TagHelperOutput output)
{
if (For != null)
{
TargetInputSelector = "#" + HtmlHelper.GenerateIdFromName(For.Name);
}
var options = new
{
entityType = EntityType,
url = UrlHelper.Action("Picker", "Entity", new { area = string.Empty }),
caption = (DialogTitle.NullEmpty() ?? Caption).HtmlEncode(),
disableIf = DisableGroupedProducts ? "groupedproduct" : (DisableBundleProducts ? "notsimpleproduct" : null),
disableIds = DisabledEntityIds == null ? null : string.Join(',', DisabledEntityIds),
thumbZoomer = EnableThumbZoomer,
highligtSearchTerm = HighlightSearchTerm,
returnField = FieldName,
delim = Delimiter,
targetInput = TargetInputSelector,
selected = Selected,
appendMode = AppendMode,
maxItems = MaxItems,
onDialogLoading = OnDialogLoadingHandler,
onDialogLoaded = OnDialogLoadedHandler,
onSelectionCompleted = OnSelectionCompletedHandler
};
var buttonId = "entpicker-toggle-" + CommonHelper.GenerateRandomInteger();
output.TagName = "button";
output.TagMode = TagMode.StartTagAndEndTag;
output.MergeAttribute("id", buttonId);
output.MergeAttribute("type", "button");
output.AppendCssClass("btn btn-secondary");
if (IconCssClass.HasValue())
{
output.Content.AppendHtml($"<i class='{ IconCssClass }'></i>");
}
if (Caption.HasValue())
{
output.Content.AppendHtml($"<span>{ Caption }</span>");
}
var json = JsonConvert.SerializeObject(options, new JsonSerializerSettings
{
ContractResolver = SmartContractResolver.Instance,
Formatting = Formatting.None,
NullValueHandling = NullValueHandling.Ignore
});
output.PostElement.AppendHtmlLine(@$ "<script data-origin='EntityPicker'>$(function() {{ $('#{buttonId}').entityPicker({json}); }})</script>");
}
private void UpdateModel(IEnumerable <TItem> items)
{
var modifiedNodes = new List <TreeNode <TItem> >();
var dict = new Dictionary <string, TreeNode <TItem> >();
foreach (var item in items)
{
// get key value and check is given and unique
var key = KeyField !(item)?.ToString();
if (key is null || string.IsNullOrEmpty(key))
{
throw new PDTreeException("Items must supply a key value.");
}
// get parent key and find parent node
var parentKey = ParentKeyField?.Invoke(item)?.ToString();
TreeNode <TItem>?parentNode = null;
if (parentKey == null || string.IsNullOrWhiteSpace(parentKey))
{
parentNode = RootNode;
}
else
{
parentNode = (dict.ContainsKey(parentKey)) ? parentNode = dict[parentKey] : RootNode.Find(parentKey);
}
if (parentNode == null)
{
throw new PDTreeException($"A parent item with key '{parentKey}' could not be found");
}
// does the node already exist?
var node = parentNode.Find(key);
if (node is null)
{
node = new TreeNode <TItem>();
// add to parent node and mark parent node for re-sort
(parentNode.Nodes ??= new List <TreeNode <TItem> >()).Add(node);
if (!modifiedNodes.Contains(parentNode))
{
modifiedNodes.Add(parentNode);
}
}
node.Key = key;
node.Text = TextField?.Invoke(item)?.ToString() ?? item.ToString();
node.IsExpanded = false;
node.Data = item;
node.ParentNode = parentNode;
node.Level = parentNode.Level + 1;
node.IconCssClass = IconCssClass?.Invoke(item, parentNode.Level + 1) ?? string.Empty;
node.Nodes = LoadOnDemand ? null : new List <TreeNode <TItem> >();
if (LoadOnDemand && IsLeaf != null && IsLeaf(item))
{
node.Nodes = new List <TreeNode <TItem> >();
}
// cache node for performance
dict.Add(key, node);
}
// re-apply sorts where necessary
foreach (var node in modifiedNodes)
{
node?.Nodes?.Sort(NodeSort);
}
}
