img and rimg will use google images first. if it fails, then fallback to imgur closes #970

src/NadekoBot/Modules/Searches/Searches.cs

@@ -115,6 +115,22 @@ namespace NadekoBot.Modules.Searches
             if (string.IsNullOrWhiteSpace(terms))
                 return;
 
+            try
+            {
+                var res = await NadekoBot.Google.GetImageAsync(terms).ConfigureAwait(false);
+                var embed = new EmbedBuilder()
+                    .WithOkColor()
+                    .WithAuthor(eab => eab.WithName("Image Search For: " + terms.TrimTo(50))
+                        .WithUrl("https://www.google.rs/search?q=" + terms + "&source=lnms&tbm=isch")
+                        .WithIconUrl("http://i.imgur.com/G46fm8J.png"))
+                    .WithDescription(res.Link)
+                    .WithImageUrl(res.Link)
+                    .WithTitle(Context.User.Mention);
+                await Context.Channel.EmbedAsync(embed).ConfigureAwait(false);
+            }
+            catch
+            {
+                _log.Warn("Falling back to Imgur search.");
                 terms = WebUtility.UrlEncode(terms).Replace(' ', '+');
 
                 var fullQueryLink = $"http://imgur.com/search?q={ terms }";
@@ -143,6 +159,7 @@ namespace NadekoBot.Modules.Searches
                     .WithTitle(Context.User.Mention);
                 await Context.Channel.EmbedAsync(embed).ConfigureAwait(false);
             }
+        }
 
         [NadekoCommand, Usage, Description, Aliases]
         public async Task RandomImage([Remainder] string terms = null)
@@ -150,7 +167,22 @@ namespace NadekoBot.Modules.Searches
             terms = terms?.Trim();
             if (string.IsNullOrWhiteSpace(terms))
                 return;
-
+            try
+            {
+                var res = await NadekoBot.Google.GetImageAsync(terms, new NadekoRandom().Next(0, 50)).ConfigureAwait(false);
+                var embed = new EmbedBuilder()
+                    .WithOkColor()
+                    .WithAuthor(eab => eab.WithName("Image Search For: " + terms.TrimTo(50))
+                        .WithUrl("https://www.google.rs/search?q=" + terms + "&source=lnms&tbm=isch")
+                        .WithIconUrl("http://i.imgur.com/G46fm8J.png"))
+                    .WithDescription(res.Link)
+                    .WithImageUrl(res.Link)
+                    .WithTitle(Context.User.Mention);
+                await Context.Channel.EmbedAsync(embed).ConfigureAwait(false);
+            }
+            catch
+            {
+                _log.Warn("Falling back to Imgur");
                 terms = WebUtility.UrlEncode(terms).Replace(' ', '+');
 
                 var fullQueryLink = $"http://imgur.com/search?q={ terms }";
@@ -179,6 +211,7 @@ namespace NadekoBot.Modules.Searches
                     .WithTitle(Context.User.Mention);
                 await Context.Channel.EmbedAsync(embed).ConfigureAwait(false);
             }
+        }
 
         [NadekoCommand, Usage, Description, Aliases]
         public async Task Lmgtfy([Remainder] string ffs = null)

src/NadekoBot/Services/Impl/GoogleApiService.cs

@@ -8,13 +8,19 @@ using System.Text.RegularExpressions;
 using Google.Apis.Urlshortener.v1;
 using Google.Apis.Urlshortener.v1.Data;
 using NLog;
+using Google.Apis.Customsearch.v1;
+using Google.Apis.Customsearch.v1.Data;
 
 namespace NadekoBot.Services.Impl
 {
     public class GoogleApiService : IGoogleApiService
     {
+        const string search_engine_id = "018084019232060951019:hs5piey28-e";
+
         private YouTubeService yt;
         private UrlshortenerService sh;
+        private CustomsearchService cs;
+        
         private Logger _log { get; }
 
         public GoogleApiService()
@@ -22,13 +28,14 @@ namespace NadekoBot.Services.Impl
             var bcs = new BaseClientService.Initializer
             {
                 ApplicationName = "Nadeko Bot",
-                ApiKey = NadekoBot.Credentials.GoogleApiKey
+                ApiKey = NadekoBot.Credentials.GoogleApiKey,
             };
 
             _log = LogManager.GetCurrentClassLogger();
 
             yt = new YouTubeService(bcs);
             sh = new UrlshortenerService(bcs);
+            cs = new CustomsearchService(bcs);
         }
         public async Task<IEnumerable<string>> GetPlaylistIdsByKeywordsAsync(string keywords, int count = 1)
         {
@@ -179,5 +186,34 @@ namespace NadekoBot.Services.Impl
 
             return toReturn;
         }
+
+        public struct ImageResult
+        {
+            public Result.ImageData Image { get; }
+            public string Link { get; }
+
+            public ImageResult(Result.ImageData image, string link)
+            {
+                this.Image = image;
+                this.Link = link;
+            }
+        }
+
+        public async Task<ImageResult> GetImageAsync(string query, int start = 0)
+        {
+            if (string.IsNullOrWhiteSpace(query))
+                throw new ArgumentNullException(nameof(query));
+
+            var req = cs.Cse.List(query);
+            req.Cx = search_engine_id;
+            req.Num = 1;
+            req.Fields = "items(image(contextLink,thumbnailLink),link)";
+            req.SearchType = CseResource.ListRequest.SearchTypeEnum.Image;
+            req.Start = start;
+
+            var search = await req.ExecuteAsync().ConfigureAwait(false);
+
+            return new ImageResult(search.Items[0].Image, search.Items[0].Link);
+        }
     }
 }