1 files changed, 148 insertions, 0 deletions

diff --git a/src/WixToolset.Core/Bind/Databases/GetFileFacadesCommand.cs b/src/WixToolset.Core/Bind/Databases/GetFileFacadesCommand.cs
new file mode 100644
index 00000000..b6bcd3af
--- /dev/null
+++ b/src/WixToolset.Core/Bind/Databases/GetFileFacadesCommand.cs
@@ -0,0 +1,148 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Bind.Databases
+{
+    using System;
+    using System.Collections.Generic;
+    using System.Globalization;
+    using System.Linq;
+    using WixToolset.Data;
+    using WixToolset.Data.Rows;
+
+    internal class GetFileFacadesCommand : ICommand
+    {
+        public Table FileTable { private get; set; }
+
+        public Table WixFileTable { private get; set; }
+
+        public Table WixDeltaPatchFileTable { private get; set; }
+
+        public Table WixDeltaPatchSymbolPathsTable { private get; set; }
+
+        public List<FileFacade> FileFacades { get; private set; }
+
+        public void Execute()
+        {
+            List<FileFacade> facades = new List<FileFacade>(this.FileTable.Rows.Count);
+
+            RowDictionary<WixFileRow> wixFiles = new RowDictionary<WixFileRow>(this.WixFileTable);
+            RowDictionary<WixDeltaPatchFileRow> deltaPatchFiles = new RowDictionary<WixDeltaPatchFileRow>(this.WixDeltaPatchFileTable);
+
+            foreach (FileRow file in this.FileTable.Rows)
+            {
+                WixDeltaPatchFileRow deltaPatchFile = null;
+
+                deltaPatchFiles.TryGetValue(file.File, out deltaPatchFile);
+
+                facades.Add(new FileFacade(file, wixFiles[file.File], deltaPatchFile));
+            }
+
+            if (null != this.WixDeltaPatchSymbolPathsTable)
+            {
+                this.ResolveDeltaPatchSymbolPaths(deltaPatchFiles, facades);
+            }
+
+            this.FileFacades = facades;
+        }
+
+        /// <summary>
+        /// Merge data from the WixPatchSymbolPaths rows into the WixDeltaPatchFile rows.
+        /// </summary>
+        public RowDictionary<WixDeltaPatchFileRow> ResolveDeltaPatchSymbolPaths(RowDictionary<WixDeltaPatchFileRow> deltaPatchFiles, IEnumerable<FileFacade> facades)
+        {
+            ILookup<string, FileFacade> filesByComponent = null;
+            ILookup<string, FileFacade> filesByDirectory = null;
+            ILookup<string, FileFacade> filesByDiskId = null;
+
+            foreach (WixDeltaPatchSymbolPathsRow row in this.WixDeltaPatchSymbolPathsTable.RowsAs<WixDeltaPatchSymbolPathsRow>().OrderBy(r => r.Type))
+            {
+                switch (row.Type)
+                {
+                    case SymbolPathType.File:
+                        this.MergeSymbolPaths(row, deltaPatchFiles[row.Id]);
+                        break;
+
+                    case SymbolPathType.Component:
+                        if (null == filesByComponent)
+                        {
+                            filesByComponent = facades.ToLookup(f => f.File.Component);
+                        }
+
+                        foreach (FileFacade facade in filesByComponent[row.Id])
+                        {
+                            this.MergeSymbolPaths(row, deltaPatchFiles[facade.File.File]);
+                        }
+                        break;
+
+                    case SymbolPathType.Directory:
+                        if (null == filesByDirectory)
+                        {
+                            filesByDirectory = facades.ToLookup(f => f.WixFile.Directory);
+                        }
+
+                        foreach (FileFacade facade in filesByDirectory[row.Id])
+                        {
+                            this.MergeSymbolPaths(row, deltaPatchFiles[facade.File.File]);
+                        }
+                        break;
+
+                    case SymbolPathType.Media:
+                        if (null == filesByDiskId)
+                        {
+                            filesByDiskId = facades.ToLookup(f => f.WixFile.DiskId.ToString(CultureInfo.InvariantCulture));
+                        }
+
+                        foreach (FileFacade facade in filesByDiskId[row.Id])
+                        {
+                            this.MergeSymbolPaths(row, deltaPatchFiles[facade.File.File]);
+                        }
+                        break;
+
+                    case SymbolPathType.Product:
+                        foreach (WixDeltaPatchFileRow fileRow in deltaPatchFiles.Values)
+                        {
+                            this.MergeSymbolPaths(row, fileRow);
+                        }
+                        break;
+
+                    default:
+                        // error
+                        break;
+                }
+            }
+
+            return deltaPatchFiles;
+        }
+
+        /// <summary>
+        /// Merge data from a row in the WixPatchSymbolsPaths table into an associated WixDeltaPatchFile row.
+        /// </summary>
+        /// <param name="row">Row from the WixPatchSymbolsPaths table.</param>
+        /// <param name="file">FileRow into which to set symbol information.</param>
+        /// <comment>This includes PreviousData as well.</comment>
+        private void MergeSymbolPaths(WixDeltaPatchSymbolPathsRow row, WixDeltaPatchFileRow file)
+        {
+            if (null == file.Symbols)
+            {
+                file.Symbols = row.SymbolPaths;
+            }
+            else
+            {
+                file.Symbols = String.Concat(file.Symbols, ";", row.SymbolPaths);
+            }
+
+            Field field = row.Fields[2];
+            if (null != field.PreviousData)
+            {
+                if (null == file.PreviousSymbols)
+                {
+                    file.PreviousSymbols = field.PreviousData;
+                }
+                else
+                {
+                    file.PreviousSymbols = String.Concat(file.PreviousSymbols, ";", field.PreviousData);
+                }
+            }
+        }
+    }
+}