CSHARP-1412: Support new text search features introduced with v3 text indexes.

Author: rstam

src/MongoDB.Driver.Tests/FilterDefinitionBuilderTests.cs

@@ -806,6 +806,9 @@ public void Text()
             var subject = CreateSubject<BsonDocument>();
             Assert(subject.Text("funny"), "{$text: {$search: 'funny'}}");
             Assert(subject.Text("funny", "en"), "{$text: {$search: 'funny', $language: 'en'}}");
+            Assert(subject.Text("funny", new TextSearchOptions { Language = "en" }), "{$text: {$search: 'funny', $language: 'en'}}");
+            Assert(subject.Text("funny", new TextSearchOptions { CaseSensitive = true }), "{$text: {$search: 'funny', $caseSensitive: true}}");
+            Assert(subject.Text("funny", new TextSearchOptions { DiacriticSensitive = true }), "{$text: {$search: 'funny', $diacriticSensitive: true}}");
         }
 
         [Test]

src/MongoDB.Driver/FilterDefinitionBuilder.cs

@@ -1121,18 +1121,32 @@ public FilterDefinition<TDocument> SizeLte(Expression<Func<TDocument, object>> f
         /// Creates a text filter.
         /// </summary>
         /// <param name="search">The search.</param>
-        /// <param name="language">The language.</param>
+        /// <param name="options">The text search options.</param>
         /// <returns>A text filter.</returns>
-        public FilterDefinition<TDocument> Text(string search, string language = null)
+        public FilterDefinition<TDocument> Text(string search, TextSearchOptions options = null)
         {
             var document = new BsonDocument
             {
                 { "$search", search },
-                { "$language", language, language != null }
+                { "$language", () => options.Language, options != null && options.Language != null },
+                { "$caseSensitive", () => options.CaseSensitive.Value, options != null && options.CaseSensitive.HasValue },
+                { "$diacriticSensitive", () => options.DiacriticSensitive.Value, options != null && options.DiacriticSensitive.HasValue }
             };
             return new BsonDocumentFilterDefinition<TDocument>(new BsonDocument("$text", document));
         }
 
+        /// <summary>
+        /// Creates a text filter.
+        /// </summary>
+        /// <param name="search">The search.</param>
+        /// <param name="language">The language.</param>
+        /// <returns>A text filter.</returns>
+        public FilterDefinition<TDocument> Text(string search, string language)
+        {
+            var options = new TextSearchOptions { Language = language };
+            return Text(search, options);
+        }
+
         /// <summary>
         /// Creates a type filter.
         /// </summary>

src/MongoDB.Driver/MongoDB.Driver.csproj

@@ -270,6 +270,7 @@
     <Compile Include="Sync\AsyncCursorEnumerableAdapter.cs" />
     <Compile Include="Sync\AsyncCursorEnumeratorAdapter.cs" />
     <Compile Include="AggregateUnwindOptions.cs" />
+    <Compile Include="TextSearchOptions.cs" />
     <Compile Include="UpdateDefinitionBuilder.cs" />
     <Compile Include="OfTypeMongoCollection.cs" />
     <Compile Include="IFilteredMongoCollection.cs" />

src/MongoDB.Driver/TextSearchOptions.cs

@@ -0,0 +1,56 @@
+/* Copyright 2015 MongoDB Inc.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+namespace MongoDB.Driver
+{
+    /// <summary>
+    /// Represents text search options.
+    /// </summary>
+    public class TextSearchOptions
+    {
+        // private fields
+        private bool? _caseSensitive;
+        private bool? _diacriticSensitive;
+        private string _language;
+
+        // public properties
+        /// <summary>
+        /// Gets or sets whether a text search should be case sensitive.
+        /// </summary>
+        public bool? CaseSensitive
+        {
+            get { return _caseSensitive; }
+            set { _caseSensitive = value; }
+        }
+
+        /// <summary>
+        /// Gets or sets whether a text search should be diacritic sensitive.
+        /// </summary>
+        public bool? DiacriticSensitive
+        {
+            get { return _diacriticSensitive; }
+            set { _diacriticSensitive = value; }
+        }
+
+        /// <summary>
+        /// Gets or sets the language for a text search.
+        /// </summary>
+        public string Language
+        {
+            get { return _language; }
+            set { _language = value; }
+        }
+    }
+}