private static List <PocketImage> ConvertJsonToImages(JsonElement json)
{
List <PocketImage> images = new List <PocketImage>();
foreach (var itemObject in json.EnumerateObject())
{
var itemJsonDocument = JsonDocument.Parse(itemObject.Value.ToString());
PocketImage image = JsonSerializer.Deserialize <PocketImage>(itemJsonDocument.RootElement.ToString());
images.Add(image);
}
return(images);
}
/// <summary>
/// Explore Pocket and find interesting articles by a certain topic
/// </summary>
/// <param name="topic">Term or topic to get articles for</param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
public async Task <IEnumerable <PocketExploreItem> > Explore(string topic, CancellationToken cancellationToken = default(CancellationToken))
{
List <PocketExploreItem> items = new List <PocketExploreItem>();
string html = await RequestAsString("https://getpocket.com/explore/" + HttpUtility.UrlEncode(topic), cancellationToken);
var document = new HtmlDocument();
document.LoadHtml(html);
IEnumerable <HtmlNode> nodes = document.DocumentNode.SelectNodesByClass("media_item");
if (nodes == null || !nodes.Any())
{
return(items);
}
for (int i = 0; i < nodes.Count(); i++)
{
HtmlNode node = nodes.ElementAt(i);
PocketExploreItem item = new PocketExploreItem();
item.ID = node.Id;
HtmlNode title = node.SelectNodeByClass("title")?.FirstChild;
if (title == null)
{
continue;
}
// get uri
string uri = title.GetAttributeValue("data-saveurl", null);
item.Uri = new Uri(uri);
// get image
string imageUri = node.SelectNodeByClass("item_image")?.GetAttributeValue("data-thumburl", null);
if (!String.IsNullOrEmpty(imageUri))
{
PocketImage image = new PocketImage();
image.Uri = new Uri(imageUri);
image.ID = "0";
image.ItemID = item.ID;
item.Images = new List <PocketImage>()
{
image
};
}
// get basic infos
item.Title = title.InnerText;
item.Excerpt = node.SelectNodeByClass("excerpt")?.InnerText;
item.IsTrending = node.SelectNodeByClass("flag-trending") != null;
// save count
string saveCountStr = node.SelectNodeByClass("save_count")?.InnerText?.Split(' ')?.FirstOrDefault();
int saveCount = 0;
Int32.TryParse(saveCountStr, out saveCount);
item.SaveCount = saveCount;
// add published date
DateTime publishedDate = DateTime.Now;
if (DateTime.TryParse(node.SelectNodeByClass("read_time")?.InnerText, out publishedDate))
{
item.PublishedTime = publishedDate;
}
items.Add(item);
}
return(items);
}
