refactor: auto-generate sync methods (#807)

- Refactored code towards more auto-generated sync methods
- Refactored `CsvWriter`
- Added cancellation token to FlushAsync

---------

Co-authored-by: Victor Irzak <[email protected]>

Author: izanhzh

src/MiniExcel/Csv/CsvWriter.cs

@@ -11,7 +11,7 @@
 
 namespace MiniExcelLibs.Csv
 {
-    internal class CsvWriter : IExcelWriter, IDisposable
+    internal partial class CsvWriter : IExcelWriter, IDisposable
     {
         private readonly StreamWriter _writer;
         private readonly CsvConfiguration _configuration;
@@ -27,26 +27,6 @@ public CsvWriter(Stream stream, object value, IConfiguration configuration, bool
             _writer = _configuration.StreamWriterFunc(stream);
         }
 
-        public int[] SaveAs()
-        {
-            if (_value == null)
-            {
-                _writer.Write("");
-                _writer.Flush();
-                return new int[0];
-            }
-
-            var rowsWritten = WriteValues(_value);
-            _writer.Flush();
-
-            return new[] { rowsWritten };
-        }
-
-        public int Insert(bool overwriteSheet = false)
-        {
-            return SaveAs().FirstOrDefault();
-        }
-
         private void AppendColumn(StringBuilder rowBuilder, CellWriteInfo column)
         {
             rowBuilder.Append(CsvHelpers.ConvertToCsvValue(ToCsvString(column.Value, column.Prop), _configuration));
@@ -57,69 +37,31 @@ private static void RemoveTrailingSeparator(StringBuilder rowBuilder)
         {
             if (rowBuilder.Length == 0)
                 return;
-            
+
             rowBuilder.Remove(rowBuilder.Length - 1, 1);
         }
 
         private string GetHeader(List<ExcelColumnInfo> props) => string.Join(
             _configuration.Seperator.ToString(),
             props.Select(s => CsvHelpers.ConvertToCsvValue(s?.ExcelColumnName, _configuration)));
 
-        private int WriteValues(object values)
-        {
-            var writeAdapter = MiniExcelWriteAdapterFactory.GetWriteAdapter(values, _configuration);
-
-            var props = writeAdapter.GetColumns();
-            if (props == null)
-            {
-                _writer.Write(_configuration.NewLine);
-                _writer.Flush();
-                return 0;
-            }
-
-            if (_printHeader)
-            {
-                _writer.Write(GetHeader(props));
-                _writer.Write(_configuration.NewLine);
-            }
-
-            if (writeAdapter == null) 
-                return 0;
-            
-            var rowBuilder = new StringBuilder();
-            var rowsWritten = 0;
-
-            foreach (var row in writeAdapter.GetRows(props))
-            {
-                rowBuilder.Clear();
-                foreach (var column in row)
-                {
-                    AppendColumn(rowBuilder, column);
-                }
-                RemoveTrailingSeparator(rowBuilder);
-                _writer.Write(rowBuilder.ToString());
-                _writer.Write(_configuration.NewLine);
-                    
-                rowsWritten++;
-            }
-            return rowsWritten;
-        }
-
-        private async Task<int> WriteValuesAsync(StreamWriter writer, object values, string seperator, string newLine, CancellationToken cancellationToken)
+        [Zomp.SyncMethodGenerator.CreateSyncVersion]
+        private async Task<int> WriteValuesAsync(StreamWriter writer, object values, string seperator, string newLine, CancellationToken cancellationToken = default)
         {
             cancellationToken.ThrowIfCancellationRequested();
-            
-#if NETSTANDARD2_0_OR_GREATER || NET
+
             IMiniExcelWriteAdapter writeAdapter = null;
             if (!MiniExcelWriteAdapterFactory.TryGetAsyncWriteAdapter(values, _configuration, out var asyncWriteAdapter))
             {
                 writeAdapter = MiniExcelWriteAdapterFactory.GetWriteAdapter(values, _configuration);
             }
-            var props = writeAdapter != null ? writeAdapter.GetColumns() : await asyncWriteAdapter.GetColumnsAsync().ConfigureAwait(false);
+            List<ExcelColumnInfo> props;
+#if SYNC_ONLY
+            props = writeAdapter?.GetColumns();
 #else
-            IMiniExcelWriteAdapter writeAdapter =  MiniExcelWriteAdapterFactory.GetWriteAdapter(values, _configuration);
-            var props = writeAdapter.GetColumns();
+            props = writeAdapter != null ? writeAdapter.GetColumns() : await asyncWriteAdapter.GetColumnsAsync().ConfigureAwait(false);
 #endif
+
             if (props == null)
             {
                 await _writer.WriteAsync(_configuration.NewLine
@@ -134,7 +76,7 @@ await _writer.FlushAsync(
                     ).ConfigureAwait(false);
                 return 0;
             }
-            
+
             if (_printHeader)
             {
                 await _writer.WriteAsync(GetHeader(props)
@@ -148,10 +90,10 @@ await _writer.WriteAsync(newLine
 #endif
                     ).ConfigureAwait(false);
             }
-            
+
             var rowBuilder = new StringBuilder();
             var rowsWritten = 0;
-            
+
             if (writeAdapter != null)
             {
                 foreach (var row in writeAdapter.GetRows(props, cancellationToken))
@@ -162,7 +104,7 @@ await _writer.WriteAsync(newLine
                         cancellationToken.ThrowIfCancellationRequested();
                         AppendColumn(rowBuilder, column);
                     }
-                    
+
                     RemoveTrailingSeparator(rowBuilder);
                     await _writer.WriteAsync(rowBuilder.ToString()
 #if NET5_0_OR_GREATER
@@ -174,24 +116,24 @@ await _writer.WriteAsync(newLine
                         .AsMemory(), cancellationToken
 #endif
                     ).ConfigureAwait(false);
-                    
+
                     rowsWritten++;
                 }
             }
-#if NETSTANDARD2_0_OR_GREATER || NET
             else
             {
+#if !SYNC_ONLY
                 await foreach (var row in asyncWriteAdapter.GetRowsAsync(props, cancellationToken).ConfigureAwait(false))
                 {
                     cancellationToken.ThrowIfCancellationRequested();
                     rowBuilder.Clear();
-                    
+
                     await foreach (var column in row.ConfigureAwait(false))
                     {
                         cancellationToken.ThrowIfCancellationRequested();
                         AppendColumn(rowBuilder, column);
                     }
-                    
+
                     RemoveTrailingSeparator(rowBuilder);
                     await _writer.WriteAsync(rowBuilder.ToString()
 #if NET5_0_OR_GREATER
@@ -203,18 +145,19 @@ await _writer.WriteAsync(newLine
                     .AsMemory(), cancellationToken
 #endif
                     ).ConfigureAwait(false);
-                    
+
                     rowsWritten++;
                 }
-            }
 #endif
+            }
             return rowsWritten;
         }
 
+        [Zomp.SyncMethodGenerator.CreateSyncVersion]
         public async Task<int[]> SaveAsAsync(CancellationToken cancellationToken = default)
         {
             cancellationToken.ThrowIfCancellationRequested();
-            
+
             var seperator = _configuration.Seperator.ToString();
             var newLine = _configuration.NewLine;
 
@@ -239,10 +182,11 @@ await _writer.FlushAsync(
                     cancellationToken
 #endif
                 ).ConfigureAwait(false);
-         
+
             return new[] { rowsWritten };
         }
 
+        [Zomp.SyncMethodGenerator.CreateSyncVersion]
         public async Task<int> InsertAsync(bool overwriteSheet = false, CancellationToken cancellationToken = default)
         {
             var rowsWritten = await SaveAsAsync(cancellationToken).ConfigureAwait(false);
@@ -260,11 +204,11 @@ public string ToCsvString(object value, ExcelColumnInfo p)
                 {
                     return dateTime.ToString(p.ExcelFormat, _configuration.Culture);
                 }
-                return _configuration.Culture.Equals(CultureInfo.InvariantCulture) 
-                    ? dateTime.ToString("yyyy-MM-dd HH:mm:ss", _configuration.Culture) 
+                return _configuration.Culture.Equals(CultureInfo.InvariantCulture)
+                    ? dateTime.ToString("yyyy-MM-dd HH:mm:ss", _configuration.Culture)
                     : dateTime.ToString(_configuration.Culture);
             }
-            
+
             if (p?.ExcelFormat != null && value is IFormattable formattableValue)
                 return formattableValue.ToString(p.ExcelFormat, _configuration.Culture);