gelbooru source

GallerySources/Gallery.Gelbooru/GallerySource.cs

@@ -1,5 +1,7 @@
 using System;
+using System.Text.RegularExpressions;
 using System.Threading.Tasks;
+using Gallery.Util;
 using Gallery.Util.Interface;
 using Gallery.Util.Model;
 using Xamarin.Forms;
@@ -13,9 +15,40 @@ namespace Gallery.Gelbooru
         public string FlyoutIconKey => "Gelbooru";
         public string HomePage => "https://gelbooru.com";
 
-        public Task<GalleryItem[]> GetRecentItemsAsync(int page)
+        public async Task<GalleryItem[]> GetRecentItemsAsync(int page)
         {
-            throw new NotImplementedException();
+            var offset = (page - 1) * 42;
+            var url = $"https://gelbooru.com/index.php?page=post&s=list&tags=all&pid={offset}";
+            var (result, error) = await NetHelper.RequestObject(url, @return: content => ResolveGalleryItems(content));
+
+            if (result == null || !string.IsNullOrEmpty(error))
+            {
+                Log.Error("gelbooru.content.load", $"failed to load content array, error: {error}");
+                return null;
+            }
+
+            return result;
+        }
+
+        private GalleryItem[] ResolveGalleryItems(string content)
+        {
+            var regex = new Regex(
+                @"<article(.|\n)+?<a id=""p(\d+?)"" href=""([^""]+?)"">(.|\n)+?<img src=""([^""]+?)"" title=""([^""]+?)""",
+                RegexOptions.Multiline);
+            var matches = regex.Matches(content);
+            var items = new GalleryItem[matches.Count];
+            for (var i = 0; i < items.Length; i++)
+            {
+                var g = matches[i].Groups;
+                items[i] = new GalleryItem(int.Parse(g[2].Value))
+                {
+                    RawUrl = g[3].Value,
+                    PreviewUrl = g[5].Value,
+                    Tags = g[6].Value.Split(' '),
+                    IsRawPage = true
+                };
+            }
+            return items;
         }
 
         public void SetCookie()