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ListFeedQuery.cs
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ListFeedQuery.cs
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Xml.Linq;
using Microsoft.AspNetCore.Mvc;
using OrchardCore.ContentManagement;
using OrchardCore.ContentManagement.Models;
using OrchardCore.ContentManagement.Records;
using OrchardCore.Feeds;
using OrchardCore.Feeds.Models;
using OrchardCore.Lists.Indexes;
using YesSql;
namespace OrchardCore.Lists.Feeds
{
public class ListFeedQuery : IFeedQueryProvider, IFeedQuery
{
public const int DefaultItemsCount = 20;
private readonly IContentManager _contentManager;
private readonly ISession _session;
public ListFeedQuery(IContentManager contentManager, ISession session)
{
_contentManager = contentManager;
_session = session;
}
public async Task<FeedQueryMatch> MatchAsync(FeedContext context)
{
var model = new ListFeedQueryViewModel();
if (!await context.Updater.TryUpdateModelAsync(model) || model.ContentItemId == null)
{
return null;
}
var contentItem = await _contentManager.GetAsync(model.ContentItemId);
var feedMetadata = await _contentManager.PopulateAspectAsync<FeedMetadata>(contentItem);
if (!feedMetadata.DisableRssFeed)
{
return null;
}
return new FeedQueryMatch { FeedQuery = this, Priority = -5 };
}
public async Task ExecuteAsync(FeedContext context)
{
var model = new ListFeedQueryViewModel();
if (!await context.Updater.TryUpdateModelAsync(model) || model.ContentItemId == null)
{
return;
}
var contentItem = await _contentManager.GetAsync(model.ContentItemId);
if (contentItem == null)
{
return;
}
var contentItemMetadata = await _contentManager.PopulateAspectAsync<ContentItemMetadata>(contentItem);
var bodyAspect = await _contentManager.PopulateAspectAsync<BodyAspect>(contentItem);
var routes = contentItemMetadata.DisplayRouteValues;
if (context.Format == "rss")
{
var link = new XElement("link");
context.Response.Element.SetElementValue("title", contentItem.DisplayText);
context.Response.Element.Add(link);
context.Response.Element.Add(new XElement("description", new XCData(bodyAspect.Body?.ToString() ?? String.Empty)));
context.Response.Contextualize(contextualize =>
{
var request = contextualize.Url.ActionContext.HttpContext.Request;
var url = contextualize.Url.Action(routes["action"].ToString(), routes["controller"].ToString(), routes, request.Scheme);
link.Add(url);
});
}
else
{
context.Builder.AddProperty(context, null, "title", contentItem.DisplayText);
context.Builder.AddProperty(context, null, new XElement("description", new XCData(bodyAspect.Body?.ToString() ?? String.Empty)));
context.Response.Contextualize(contextualize =>
{
var request = contextualize.Url.ActionContext.HttpContext.Request;
var url = contextualize.Url.Action(routes["action"].ToString(), routes["controller"].ToString(), routes, request.Scheme);
context.Builder.AddProperty(context, null, "link", url);
});
}
int itemsCount = contentItem.Content.ListPart?.FeedItemsCount ?? DefaultItemsCount;
IEnumerable<ContentItem> items;
items = itemsCount == 0
? Enumerable.Empty<ContentItem>()
: await _session.Query<ContentItem>()
.With<ContainedPartIndex>(x => x.ListContentItemId == contentItem.ContentItemId)
.With<ContentItemIndex>(x => x.Published)
.OrderByDescending(x => x.CreatedUtc)
.Take(itemsCount)
.ListAsync();
foreach (var item in items)
{
context.Builder.AddItem(context, item);
}
}
}
}