mirror of
https://github.com/danieleteti/delphimvcframework.git
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136 lines
3.6 KiB
ObjectPascal
136 lines
3.6 KiB
ObjectPascal
// ***************************************************************************
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//
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// Delphi MVC Framework
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//
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// Copyright (c) 2010-2020 Daniele Teti and the DMVCFramework Team
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//
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// https://github.com/danieleteti/delphimvcframework
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//
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// ***************************************************************************
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// ***************************************************************************
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unit MVCFramework.View.Renderers.Mustache;
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{$IFDEF LINUX}
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This unit is not compatible with Linux
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{$ENDIF}
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interface
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uses
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MVCFramework, System.SysUtils,
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MVCFramework.Commons, System.IOUtils, System.Classes, Data.DB;
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type
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{ This class implements the mustache view engine for server side views }
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TMVCMustacheViewEngine = class(TMVCBaseViewEngine)
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strict private
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procedure PrepareModels;
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private
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FJSONModel: string;
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public
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procedure Execute(const ViewName: string; const OutputStream: TStream);
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override;
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end;
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implementation
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uses
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SynMustache,
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SynCommons,
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MVCFramework.Serializer.Defaults,
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MVCFramework.Serializer.Intf,
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MVCFramework.DuckTyping, System.Generics.Collections;
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{$WARNINGS OFF}
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procedure TMVCMustacheViewEngine.Execute(const ViewName: string; const OutputStream: TStream);
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var
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lViewFileName: string;
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lViewTemplate: RawUTF8;
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lViewEngine: TSynMustache;
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lSW: TStreamWriter;
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begin
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PrepareModels;
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lViewFileName := GetRealFileName(ViewName);
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if not FileExists(lViewFileName) then
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raise EMVCFrameworkViewException.CreateFmt('View [%s] not found', [ViewName]);
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lViewTemplate := StringToUTF8(TFile.ReadAllText(lViewFileName, TEncoding.UTF8));
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{ don't free this instance! There is a garbagecollector in SynCommons }
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lViewEngine := TSynMustache.Parse(lViewTemplate);
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lSW := TStreamWriter.Create(OutputStream);
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try
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lSW.Write(UTF8Tostring(lViewEngine.RenderJSON(FJSONModel)));
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finally
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lSW.Free;
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end;
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end;
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{$WARNINGS ON}
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procedure TMVCMustacheViewEngine.PrepareModels;
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var
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lFirst: Boolean;
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lList: IMVCList;
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DataObj: TPair<string, TObject>;
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lDSPair: TPair<string, TDataSet>;
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lSJSON: string;
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lJSON: string;
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lSer: IMVCSerializer;
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begin
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if (FJSONModel <> '{}') and (not FJSONModel.IsEmpty) then
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Exit;
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FJSONModel := '{}';
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lSer := GetDefaultSerializer;
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lSJSON := '{';
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lFirst := True;
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if Assigned(ViewModel) then
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begin
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for DataObj in ViewModel do
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begin
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lList := TDuckTypedList.Wrap(DataObj.Value);
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if lList <> nil then
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lJSON := lSer.SerializeCollection(DataObj.Value)
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else
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lJSON := lSer.SerializeObject(DataObj.Value);
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if not lFirst then
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lSJSON := lSJSON + ',';
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lSJSON := lSJSON + '"' + DataObj.Key + '":' + lJSON;
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lFirst := False;
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end;
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end;
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if Assigned(ViewDataSets) then
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begin
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for lDSPair in ViewDataSets do
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begin
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lJSON := lSer.SerializeDataSet(lDSPair.Value);
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if not lFirst then
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lSJSON := lSJSON + ',';
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lSJSON := lSJSON + '"' + lDSPair.Key + '":' + lJSON;
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lFirst := False;
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end;
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end;
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lSJSON := lSJSON + '}';
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FJSONModel := lSJSON;
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end;
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end.
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