added ~hentai search by tag

NadekoBot/Modules/Conversations.cs

@@ -486,9 +486,10 @@ namespace NadekoBot.Modules
                     });
 
                 cgb.CreateCommand("dump")
-                    .Description("Dumps all of the invites it can to dump.txt")
+                    .Description("Dumps all of the invites it can to dump.txt.** Owner Only.**")
                     .Do(async e =>
                     {
+                        if (NadekoBot.OwnerID != e.User.Id) return;
                         int i = 0;
                         int j = 0;
                         string invites = "";

NadekoBot/Modules/Searches.cs

@@ -103,6 +103,27 @@ namespace NadekoBot.Modules
                         await e.Send("This feature is being reconstructed.");
 
                     });
+
+                cgb.CreateCommand("~hentai")
+                    .Description("Shows a random image from danbooru with a given tag. Tag is optional but preffered.\n**Usage**: ~hentai yuri")
+                    .Parameter("tag", ParameterType.Unparsed)
+                    .Do(async e => {
+                        try {
+                            var rng = new Random();
+                            var tag = e.GetArg("tag");
+
+                            if (tag == "loli") //loli doesn't work for some reason atm
+                                tag = "flat_chest";
+
+                            var webpage = MakeRequestAndGetResponse($"http://danbooru.donmai.us/posts?page={ rng.Next(0, 30) }&tags={ tag }");
+                            var matches = Regex.Matches(webpage, "data-large-file-url=\"(?<id>.*)\"");
+
+                            await e.Send($"http://danbooru.donmai.us{ matches[rng.Next(0, matches.Count)].Groups["id"].Value }".ShortenUrl());
+                        } catch (Exception) {
+                            await e.Send("Error ;(");
+                        }
+                    });
+
                 cgb.CreateCommand("lmgtfy")
                     .Description("Google something for an idiot.")
                     .Parameter("ffs", ParameterType.Unparsed)
@@ -113,6 +134,9 @@ namespace NadekoBot.Modules
             });
         }
 
+        public static string MakeRequestAndGetResponse(string v) =>
+            new StreamReader(((HttpWebRequest)WebRequest.Create(v)).GetResponse().GetResponseStream()).ReadToEnd();
+
         private string token = "";
         private AnimeResult GetAnimeQueryResultLink(string query)
         {