Intellisense for when the text starts with bracket (#164)

* Intellisense for when the text starts with bracket

src/Microsoft.SqlTools.ServiceLayer/Hosting/ServiceHost.cs

@@ -157,7 +157,7 @@ namespace Microsoft.SqlTools.ServiceLayer.Hosting
                         CompletionProvider = new CompletionOptions
                         {
                             ResolveProvider = true,
-                            TriggerCharacters = new string[] { ".", "-", ":", "\\" }
+                            TriggerCharacters = new string[] { ".", "-", ":", "\\", "[" }
                         },
                         SignatureHelpProvider = new SignatureHelpOptions
                         {

src/Microsoft.SqlTools.ServiceLayer/LanguageServices/AutoCompleteHelper.cs

@@ -31,8 +31,6 @@ namespace Microsoft.SqlTools.ServiceLayer.LanguageServices
 
         private static WorkspaceService<SqlToolsSettings> workspaceServiceInstance;
 
-        private static Regex ValidSqlNameRegex = new Regex(@"^[\p{L}_@][\p{L}\p{N}@$#_]{0,127}$");
-
         private static CompletionItem[] emptyCompletionList = new CompletionItem[0];
 
         private static readonly string[] DefaultCompletionText = new string[]
@@ -433,7 +431,7 @@ namespace Microsoft.SqlTools.ServiceLayer.LanguageServices
             int startColumn, 
             int endColumn)
         {
-            return CreateCompletionItem(label, label + " keyword", label, CompletionItemKind.Keyword, row, startColumn, endColumn);
+            return SqlCompletionItem.CreateCompletionItem(label, label + " keyword", label, CompletionItemKind.Keyword, row, startColumn, endColumn);
         }
 
         internal static CompletionItem[] AddTokenToItems(CompletionItem[] currentList, Token token, int row,
@@ -447,49 +445,12 @@ namespace Microsoft.SqlTools.ServiceLayer.LanguageServices
                 ))
             {
                 var list = currentList.ToList();
-                list.Insert(0, CreateCompletionItem(token.Text, token.Text, token.Text, CompletionItemKind.Text, row, startColumn, endColumn));
+                list.Insert(0, SqlCompletionItem.CreateCompletionItem(token.Text, token.Text, token.Text, CompletionItemKind.Text, row, startColumn, endColumn));
                 return list.ToArray();
             }
             return currentList;
         }
 
-        private static CompletionItem CreateCompletionItem(
-            string label, 
-            string detail,
-            string insertText,
-            CompletionItemKind kind,
-            int row,
-            int startColumn,
-            int endColumn)
-        {
-            CompletionItem item = new CompletionItem()
-            {
-                Label = label,
-                Kind = kind,
-                Detail = detail,
-                InsertText = insertText,
-                TextEdit = new TextEdit
-                {
-                    NewText = insertText,
-                    Range = new Range
-                    {
-                        Start = new Position
-                        {
-                            Line = row,
-                            Character = startColumn
-                        },
-                        End = new Position
-                        {
-                            Line = row,
-                            Character = endColumn
-                        }
-                    }
-                }
-            };
-
-            return item;
-        }
-
         /// <summary>
         /// Converts a list of Declaration objects to CompletionItem objects
         /// since VS Code expects CompletionItems but SQL Parser works with Declarations
@@ -502,56 +463,22 @@ namespace Microsoft.SqlTools.ServiceLayer.LanguageServices
             IEnumerable<Declaration> suggestions, 
             int row,
             int startColumn,
-            int endColumn)
+            int endColumn, 
+            string tokenText = null)
         {           
             List<CompletionItem> completions = new List<CompletionItem>();
     
             foreach (var autoCompleteItem in suggestions)
             {
-                string  insertText = GetCompletionItemInsertName(autoCompleteItem);
-                CompletionItemKind kind = CompletionItemKind.Variable;
-                switch (autoCompleteItem.Type)
-                {
-                    case DeclarationType.Schema:
-                        kind = CompletionItemKind.Module;
-                        break;
-                    case DeclarationType.Column:
-                        kind = CompletionItemKind.Field;
-                        break;
-                    case DeclarationType.Table:
-                    case DeclarationType.View:
-                        kind = CompletionItemKind.File;
-                        break;
-                    case DeclarationType.Database:
-                        kind = CompletionItemKind.Method;
-                        break;
-                    case DeclarationType.ScalarValuedFunction:
-                    case DeclarationType.TableValuedFunction:
-                    case DeclarationType.BuiltInFunction:
-                        kind = CompletionItemKind.Value;
-                        break;
-                    default:
-                        kind = CompletionItemKind.Unit;
-                        break;
-                }
+                SqlCompletionItem sqlCompletionItem = new SqlCompletionItem(autoCompleteItem, tokenText);
 
                 // convert the completion item candidates into CompletionItems
-                completions.Add(CreateCompletionItem(autoCompleteItem.Title, autoCompleteItem.Title, insertText, kind, row, startColumn, endColumn));
+                completions.Add(sqlCompletionItem.CreateCompletionItem(row, startColumn, endColumn));
             }
 
             return completions.ToArray();
         }
 
-        private static string GetCompletionItemInsertName(Declaration autoCompleteItem)
-        {
-            string insertText = autoCompleteItem.Title;
-            if (!string.IsNullOrEmpty(autoCompleteItem.Title) && !ValidSqlNameRegex.IsMatch(autoCompleteItem.Title))
-            {
-                insertText = string.Format(CultureInfo.InvariantCulture, "[{0}]", autoCompleteItem.Title);
-            }
-            return insertText;
-        }
-
         /// <summary>
         /// Preinitialize the parser and binder with common metadata.
         /// This should front load the long binding wait to the time the

src/Microsoft.SqlTools.ServiceLayer/LanguageServices/LanguageService.cs

@@ -977,7 +977,8 @@ namespace Microsoft.SqlTools.ServiceLayer.LanguageServices
                                 scriptParseInfo.CurrentSuggestions, 
                                 startLine, 
                                 startColumn, 
-                                endColumn);
+                                endColumn, 
+                                tokenText);
                         },
                         timeoutOperation: (bindingContext) =>
                         {

src/Microsoft.SqlTools.ServiceLayer/LanguageServices/SqlCompletionItem.cs

@@ -0,0 +1,207 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+using System;
+using System.Globalization;
+using System.Text.RegularExpressions;
+using Microsoft.SqlServer.Management.SqlParser.Intellisense;
+using Microsoft.SqlTools.ServiceLayer.LanguageServices.Contracts;
+using Microsoft.SqlTools.ServiceLayer.Utility;
+using Microsoft.SqlTools.ServiceLayer.Workspace.Contracts;
+
+namespace Microsoft.SqlTools.ServiceLayer.LanguageServices
+{
+    /// <summary>
+    /// Creates a completion item from SQL parser declaration item
+    /// </summary>
+    public class SqlCompletionItem
+    {
+        private static Regex ValidSqlNameRegex = new Regex(@"^[\p{L}_@][\p{L}\p{N}@$#_]{0,127}$");
+
+        /// <summary>
+        /// Create new instance given the SQL parser declaration
+        /// </summary>
+        public SqlCompletionItem(Declaration declaration, string tokenText) :
+            this(declaration == null ? null : declaration.Title, declaration == null ? DeclarationType.Table : declaration.Type, tokenText)
+        {
+        }
+
+        /// <summary>
+        /// Creates new instance given declaration title and type
+        /// </summary>
+        public SqlCompletionItem(string declarationTitle, DeclarationType declarationType, string tokenText)
+        {
+            Validate.IsNotNullOrEmptyString("declarationTitle", declarationTitle);
+
+            DeclarationTitle = declarationTitle;
+            DeclarationType = declarationType;
+            TokenText = tokenText;
+
+            Init();
+        }
+
+        private void Init()
+        {
+            InsertText = GetCompletionItemInsertName();
+            Label = DeclarationTitle;
+            if (StartsWithBracket(TokenText))
+            {
+                Label = WithBracket(Label);
+                InsertText = WithBracket(InsertText);
+            }
+            Detail = Label;
+            Kind = CreateCompletionItemKind();
+        }
+
+        private CompletionItemKind CreateCompletionItemKind()
+        {
+            CompletionItemKind kind = CompletionItemKind.Variable;
+            switch (DeclarationType)
+            {
+                case DeclarationType.Schema:
+                    kind = CompletionItemKind.Module;
+                    break;
+                case DeclarationType.Column:
+                    kind = CompletionItemKind.Field;
+                    break;
+                case DeclarationType.Table:
+                case DeclarationType.View:
+                    kind = CompletionItemKind.File;
+                    break;
+                case DeclarationType.Database:
+                    kind = CompletionItemKind.Method;
+                    break;
+                case DeclarationType.ScalarValuedFunction:
+                case DeclarationType.TableValuedFunction:
+                case DeclarationType.BuiltInFunction:
+                    kind = CompletionItemKind.Value;
+                    break;
+                default:
+                    kind = CompletionItemKind.Unit;
+                    break;
+            }
+
+            return kind;
+        }
+
+        /// <summary>
+        /// Declaration Title
+        /// </summary>
+        public string DeclarationTitle { get; private set; }
+
+        /// <summary>
+        /// Token text from the editor
+        /// </summary>
+        public string TokenText { get; private set; }
+
+        /// <summary>
+        /// SQL declaration type
+        /// </summary>
+        public DeclarationType DeclarationType { get; private set; }
+
+        /// <summary>
+        /// Completion item label
+        /// </summary>
+        public string Label { get; private set; }
+
+        /// <summary>
+        /// Completion item kind
+        /// </summary>
+        public CompletionItemKind Kind { get; private set; }
+
+        /// <summary>
+        /// Completion insert text
+        /// </summary>
+        public string InsertText { get; private set; }
+
+        /// <summary>
+        /// Completion item detail
+        /// </summary>
+        public string Detail { get; private set; }
+
+        /// <summary>
+        /// Creates a completion item given the editor info
+        /// </summary>
+        public CompletionItem CreateCompletionItem(
+          int row,
+          int startColumn,
+          int endColumn)
+        {
+            return CreateCompletionItem(Label, Detail, InsertText, Kind, row, startColumn, endColumn);
+        }
+
+        /// <summary>
+        /// Creates a completion item
+        /// </summary>
+        public static CompletionItem CreateCompletionItem(
+           string label,
+           string detail,
+           string insertText,
+           CompletionItemKind kind,
+           int row,
+           int startColumn,
+           int endColumn)
+        {
+            CompletionItem item = new CompletionItem()
+            {
+                Label = label,
+                Kind = kind,
+                Detail = detail,
+                InsertText = insertText,
+                TextEdit = new TextEdit
+                {
+                    NewText = insertText,
+                    Range = new Range
+                    {
+                        Start = new Position
+                        {
+                            Line = row,
+                            Character = startColumn
+                        },
+                        End = new Position
+                        {
+                            Line = row,
+                            Character = endColumn
+                        }
+                    }
+                }
+            };
+
+            return item;
+        }
+
+        private string GetCompletionItemInsertName()
+        {
+            string insertText = DeclarationTitle;
+            if (!string.IsNullOrEmpty(DeclarationTitle) && !ValidSqlNameRegex.IsMatch(DeclarationTitle))
+            {
+                insertText = WithBracket(DeclarationTitle);
+            }
+            return insertText;
+        }
+
+        private bool HasBrackets(string text)
+        {
+            return text != null && text.StartsWith("[") && text.EndsWith("]");
+        }
+
+        private bool StartsWithBracket(string text)
+        {
+            return text != null && text.StartsWith("[");
+        }
+
+        private string WithBracket(string text)
+        {
+            if (!HasBrackets(text))
+            {
+                return string.Format(CultureInfo.InvariantCulture, "[{0}]", text);
+            }
+            else
+            {
+                return text;
+            }
+        }
+    }
+}

test/Microsoft.SqlTools.ServiceLayer.Test/LanguageServer/SqlCompletionItemTests.cs

@@ -0,0 +1,209 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+using Microsoft.SqlServer.Management.SqlParser.Intellisense;
+using Microsoft.SqlTools.ServiceLayer.LanguageServices;
+using Microsoft.SqlTools.ServiceLayer.LanguageServices.Contracts;
+using Xunit;
+
+namespace Microsoft.SqlTools.ServiceLayer.Test.LanguageServer
+{
+    public class SqlCompletionItemTests
+    {
+        [Fact]
+        public void InsertTextShouldIncludeBracketGivenNameWithSpace()
+        {
+            string declarationTitle = "name with space";
+            string expected = "[" + declarationTitle + "]";
+
+            DeclarationType declarationType = DeclarationType.Table;
+            string tokenText = "";
+            SqlCompletionItem item = new SqlCompletionItem(declarationTitle, declarationType, tokenText);
+            CompletionItem completionItem = item.CreateCompletionItem(0, 1, 2);
+
+            Assert.True(completionItem.InsertText.StartsWith("[") && completionItem.InsertText.EndsWith("]"));
+        }
+
+        [Fact]
+        public void InsertTextShouldIncludeBracketGivenNameWithSpecialCharacter()
+        {
+            string declarationTitle = "name @";
+            string expected = "[" + declarationTitle + "]";
+            DeclarationType declarationType = DeclarationType.Table;
+            string tokenText = "";
+            SqlCompletionItem item = new SqlCompletionItem(declarationTitle, declarationType, tokenText);
+            CompletionItem completionItem = item.CreateCompletionItem(0, 1, 2);
+
+            Assert.Equal(completionItem.InsertText, expected);
+            Assert.Equal(completionItem.Detail, declarationTitle);
+            Assert.Equal(completionItem.Label, declarationTitle);
+        }
+
+        [Fact]
+        public void LabelShouldIncludeBracketGivenTokenWithBracket()
+        {
+            string declarationTitle = "name";
+            string expected = "[" + declarationTitle + "]";
+            DeclarationType declarationType = DeclarationType.Table;
+            string tokenText = "[";
+            SqlCompletionItem item = new SqlCompletionItem(declarationTitle, declarationType, tokenText);
+            CompletionItem completionItem = item.CreateCompletionItem(0, 1, 2);
+
+            Assert.Equal(completionItem.Label, expected);
+            Assert.Equal(completionItem.InsertText, expected);
+            Assert.Equal(completionItem.Detail, expected);
+        }
+
+        [Fact]
+        public void LabelShouldIncludeBracketGivenTokenWithBrackets()
+        {
+            string declarationTitle = "name";
+            string expected = "[" + declarationTitle + "]";
+            DeclarationType declarationType = DeclarationType.Table;
+            string tokenText = "[]";
+            SqlCompletionItem item = new SqlCompletionItem(declarationTitle, declarationType, tokenText);
+            CompletionItem completionItem = item.CreateCompletionItem(0, 1, 2);
+
+            Assert.Equal(completionItem.Label, expected);
+            Assert.Equal(completionItem.InsertText, expected);
+            Assert.Equal(completionItem.Detail, expected);
+        }
+
+        [Fact]
+        public void LabelShouldIncludeBracketGivenSqlObjectNameWithBracket()
+        {
+            string declarationTitle = @"Bracket\[";
+            string expected = "[" + declarationTitle + "]";
+            DeclarationType declarationType = DeclarationType.Table;
+            string tokenText = "";
+            SqlCompletionItem item = new SqlCompletionItem(declarationTitle, declarationType, tokenText);
+            CompletionItem completionItem = item.CreateCompletionItem(0, 1, 2);
+
+            Assert.Equal(completionItem.Label, declarationTitle);
+            Assert.Equal(completionItem.InsertText, expected);
+            Assert.Equal(completionItem.Detail, declarationTitle);
+        }
+
+        [Fact]
+        public void LabelShouldIncludeBracketGivenSqlObjectNameWithBracketAndTokenWithBracket()
+        {
+            string declarationTitle = @"Bracket\[";
+            string expected = "[" + declarationTitle + "]";
+            DeclarationType declarationType = DeclarationType.Table;
+            string tokenText = "[]";
+            SqlCompletionItem item = new SqlCompletionItem(declarationTitle, declarationType, tokenText);
+            CompletionItem completionItem = item.CreateCompletionItem(0, 1, 2);
+
+            Assert.Equal(completionItem.Label, expected);
+            Assert.Equal(completionItem.InsertText, expected);
+            Assert.Equal(completionItem.Detail, expected);
+        }
+
+        [Fact]
+        public void LabelShouldNotIncludeBracketGivenNameWithBrackets()
+        {
+            string declarationTitle = "[name]";
+            string expected = declarationTitle;
+            DeclarationType declarationType = DeclarationType.Table;
+            string tokenText = "[]";
+            SqlCompletionItem item = new SqlCompletionItem(declarationTitle, declarationType, tokenText);
+            CompletionItem completionItem = item.CreateCompletionItem(0, 1, 2);
+
+            Assert.Equal(completionItem.Label, expected);
+            Assert.Equal(completionItem.InsertText, expected);
+            Assert.Equal(completionItem.Detail, expected);
+        }
+
+        [Fact]
+        public void LabelShouldIncludeBracketGivenNameWithOneBracket()
+        {
+            string declarationTitle = "[name";
+            string expected = "[" + declarationTitle + "]";
+            DeclarationType declarationType = DeclarationType.Table;
+            string tokenText = "[]";
+            SqlCompletionItem item = new SqlCompletionItem(declarationTitle, declarationType, tokenText);
+            CompletionItem completionItem = item.CreateCompletionItem(0, 1, 2);
+
+            Assert.Equal(completionItem.Label, expected);
+            Assert.Equal(completionItem.InsertText, expected);
+            Assert.Equal(completionItem.Detail, expected);
+        }
+
+        [Fact]
+        public void KindShouldBeModuleGivenSchemaDeclarationType()
+        {
+            CompletionItemKind expectedType = CompletionItemKind.Module;
+            DeclarationType declarationType = DeclarationType.Schema;
+            ValidateDeclarationType(declarationType, expectedType);
+        }
+
+        [Fact]
+        public void KindShouldBeFieldGivenColumnDeclarationType()
+        {
+            CompletionItemKind expectedType = CompletionItemKind.Field;
+            DeclarationType declarationType = DeclarationType.Column;
+            ValidateDeclarationType(declarationType, expectedType);
+        }
+
+        [Fact]
+        public void KindShouldBeFileGivenTableDeclarationType()
+        {
+            CompletionItemKind expectedType = CompletionItemKind.File;
+            DeclarationType declarationType = DeclarationType.Table;
+            ValidateDeclarationType(declarationType, expectedType);
+        }
+
+        [Fact]
+        public void KindShouldBeFileGivenViewDeclarationType()
+        {
+            CompletionItemKind expectedType = CompletionItemKind.File;
+            DeclarationType declarationType = DeclarationType.View;
+            ValidateDeclarationType(declarationType, expectedType);
+        }
+
+        [Fact]
+        public void KindShouldBeMethodGivenDatabaseDeclarationType()
+        {
+            CompletionItemKind expectedType = CompletionItemKind.Method;
+            DeclarationType declarationType = DeclarationType.Database;
+            ValidateDeclarationType(declarationType, expectedType);
+        }
+
+        [Fact]
+        public void KindShouldBeValueGivenScalarValuedFunctionDeclarationType()
+        {
+            CompletionItemKind expectedType = CompletionItemKind.Value;
+            DeclarationType declarationType = DeclarationType.ScalarValuedFunction;
+            ValidateDeclarationType(declarationType, expectedType);
+        }
+
+        [Fact]
+        public void KindShouldBeValueGivenTableValuedFunctionDeclarationType()
+        {
+            CompletionItemKind expectedType = CompletionItemKind.Value;
+            DeclarationType declarationType = DeclarationType.TableValuedFunction;
+            ValidateDeclarationType(declarationType, expectedType);
+        }
+
+        [Fact]
+        public void KindShouldBeUnitGivenUnknownDeclarationType()
+        {
+            CompletionItemKind expectedType = CompletionItemKind.Unit;
+            DeclarationType declarationType = DeclarationType.XmlIndex;
+            ValidateDeclarationType(declarationType, expectedType);
+        }
+
+        private void ValidateDeclarationType(DeclarationType declarationType, CompletionItemKind expectedType)
+        {
+            string declarationTitle = "name";
+            string tokenText = "";
+            SqlCompletionItem item = new SqlCompletionItem(declarationTitle, declarationType, tokenText);
+            CompletionItem completionItem = item.CreateCompletionItem(0, 1, 2);
+
+
+            Assert.Equal(completionItem.Kind, expectedType);
+        }
+    }
+}