[issue 135] enhanced search

implement enhanced search for chat messages

Plugins/Web/StatsWeb/Extensions/SearchQueryExtensions.cs

@@ -0,0 +1,77 @@
+using SharedLibraryCore.Dtos;
+using StatsWeb.Dtos;
+using System;
+using System.Linq;
+
+namespace StatsWeb.Extensions
+{
+    public static class SearchQueryExtensions
+    {
+        private const int MAX_MESSAGES = 100;
+
+        /// <summary>
+        ///  todo: lets abstract this out to a generic buildable query
+        ///  this is just a dirty PoC
+        /// </summary>
+        /// <param name="query"></param>
+        /// <returns></returns>
+        public static ChatSearchQuery ParseSearchInfo(this string query, int count, int offset)
+        {
+            string[] filters = query.Split('|');
+            var searchRequest = new ChatSearchQuery
+            {
+                Filter = query,
+                Count = count,
+                Offset = offset
+            };
+
+            // sanity checks
+            searchRequest.Count = Math.Min(searchRequest.Count, MAX_MESSAGES);
+            searchRequest.Count = Math.Max(searchRequest.Count, 0);
+            searchRequest.Offset = Math.Max(searchRequest.Offset, 0);
+
+            if (filters.Length > 1)
+            {
+                if (filters[0].ToLower() != "chat")
+                {
+                    throw new ArgumentException("Query is not compatible with chat");
+                }
+
+                foreach (string filter in filters.Skip(1))
+                {
+                    string[] args = filter.Split(' ');
+
+                    if (args.Length > 1)
+                    {
+                        string recombinedArgs = string.Join(' ', args.Skip(1));
+                        switch (args[0].ToLower())
+                        {
+                            case "before":
+                                searchRequest.SentBefore = DateTime.Parse(recombinedArgs);
+                                break;
+                            case "after":
+                                searchRequest.SentAfter = DateTime.Parse(recombinedArgs);
+                                break;
+                            case "server":
+                                searchRequest.ServerId = args[1];
+                                break;
+                            case "client":
+                                searchRequest.ClientId = int.Parse(args[1]);
+                                break;
+                            case "contains":
+                                searchRequest.MessageContains = string.Join(' ', args.Skip(1));
+                                break;
+                            case "sort":
+                                searchRequest.Direction = Enum.Parse<SortDirection>(args[1], ignoreCase: true);
+                                break;
+                        }
+                    }
+                }
+
+                return searchRequest;
+            }
+
+            throw new ArgumentException("No filters specified for chat search");
+        }
+    }
+}