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{
This file is part of the Free Component Library.
Copyright (c) 2017 Michael Van Canneyt, member of the Free Pascal development team
Frame to configure a JSON report dataset.
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
**********************************************************************}
unit frafpreportjsondata;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, FileUtil, Forms, Controls, StdCtrls, EditBtn, Buttons, ActnList, ValEdit, fpjson, fpreportdesignreportdata, db,
dialogs;
type
TFrame = TReportDataConfigFrame ;
{ TJSONReportDataConfigFrame }
TJSONReportDataConfigFrame = class(TFrame)
ARefresh: TAction;
ALJSON: TActionList;
CBArrayBased: TCheckBox;
EDataPath: TEdit;
EURL: TEdit;
FEData: TFileNameEdit;
ILJSON: TImageList;
LDataPath: TLabel;
RBFile: TRadioButton;
RBURL: TRadioButton;
SBrefresh: TSpeedButton;
VLEFields: TValueListEditor;
procedure ARefreshExecute(Sender: TObject);
procedure ARefreshUpdate(Sender: TObject);
procedure EURLEditingDone(Sender: TObject);
procedure EURLEnter(Sender: TObject);
procedure FEDataEditingDone(Sender: TObject);
procedure FEDataEnter(Sender: TObject);
procedure VLEFieldsValidateEntry(sender: TObject; aCol, aRow: Integer; const OldValue: string; var NewValue: String);
private
public
Procedure GetConfig(aConfig : TJSONObject); override;
Procedure SetConfig(aConfig : TJSONObject); override;
Function SaveNotOKMessage : String; override;
end;
{ TJSONReportDataHandler }
implementation
uses fpreportdatajson;
{$R *.lfm}
{ TJSONReportDataConfigFrame }
procedure TJSONReportDataConfigFrame.ARefreshUpdate(Sender: TObject);
begin
(Sender as TAction).Enabled:=(EURL.Text<>'') or (FEData.FileName<>'');
end;
procedure TJSONReportDataConfigFrame.EURLEditingDone(Sender: TObject);
begin
if (EURL.Text<>'') then
ARefreshExecute(Self);
end;
procedure TJSONReportDataConfigFrame.EURLEnter(Sender: TObject);
begin
RBURL.Checked:=True;
end;
procedure TJSONReportDataConfigFrame.FEDataEditingDone(Sender: TObject);
begin
if (FEData.FileName<>'') and FileExists(FEData.FileName) then
ARefreshExecute(Self);
end;
procedure TJSONReportDataConfigFrame.FEDataEnter(Sender: TObject);
begin
RBFile.Checked:=True;
end;
procedure TJSONReportDataConfigFrame.ARefreshExecute(Sender: TObject);
Var
J : TJSONData;
ArrayBased : Boolean;
P : String;
R : TRecordDescArray;
I,II : Integer;
begin
if RBURL.Checked then
J:=TJSONReportDataHandler.GetDataFromURL(EURL.Text)
else
J:=TJSONReportDataHandler.GetDataFromFile(FEData.FileName);
if Not DetectJSONStruct(J,EDataPath.Text,P,R,ArrayBased) then
ShowMessage(SErrNoDataFound)
else
begin
EDataPath.Text:=P;
CBArrayBased.Checked:=ArrayBased;
VLEFields.Strings.Clear;
For I:=0 to Length(R)-1 do
begin
II:=VLEFields.Strings.Add(R[I].name+'='+FieldTypeToString(R[i].FieldType,False));
VLEFields.ItemProps[II].EditStyle:=esPickList;
VLEFields.ItemProps[II].PickList.CommaText:='string,boolean,integer,float,largeint';
end;
end;
end;
procedure TJSONReportDataConfigFrame.VLEFieldsValidateEntry(sender: TObject; aCol, aRow: Integer; const OldValue: string;
var NewValue: String);
Var
FT : TFieldType;
begin
if aCol=1 then
begin
if not TryStringToFieldType(NewValue,Ft,True) then
newvalue:=oldvalue;
end
else
begin
if Not IsValidIdent(NewValue) then
NewValue:=OldValue;
end;
end;
procedure TJSONReportDataConfigFrame.GetConfig(aConfig: TJSONObject);
Var
M : TJSONArray;
I : Integer;
N,V : String;
begin
if RBFile.Checked then
begin
aConfig.Strings[KeyFileName]:=FEData.FileName;
aConfig.delete(KeyURL);
end
else
begin
aConfig.Strings[KeyURL]:=EURL.Text;
aConfig.Delete(KeyFileName);
end;
aConfig.Strings[KeyDataPath]:=EDataPath.Text;
if CBArrayBased.Checked then
aConfig.Strings[keydataform]:='array'
else
aConfig.Strings[keydataform]:='object';
M:=TJSONArray.Create;
For I:=0 to VLEFields.Strings.Count-1 do
begin
VLEFields.Strings.GetNameValue(I,N,V);
M.Add(TJSONOBject.Create([KeyFieldName,N,KeyFieldType,V]));
end;
aConfig.Objects[keyMetaData]:=TJSONObject.Create([keyFields,M]);
// Writeln(aConfig.FormatJSON);
end;
procedure TJSONReportDataConfigFrame.SetConfig(aConfig: TJSONObject);
Var
M : TJSONArray;
O : TJSONObject;
I,II : Integer;
begin
FEData.FileName:=aConfig.Get(KeyFileName,'');
EURL.Text:=aConfig.Get(KeyURL,'');
if (FEData.FileName<>'') or (EURL.Text='') then
RBFile.Checked:=True;
EDataPath.Text:=aConfig.Get(KeyDataPath,'');
CBArrayBased.Checked:=aConfig.Get(keydataform,'object')='array';
M:=aConfig.get(keyMetaData,TJSONarray(Nil));
if Assigned(M) then
begin
VLEFields.Strings.Clear;
For I:=0 to M.Count-1 do
begin
O:=M.Objects[i];
II:=VLEFields.Strings.Add(O.Get(keyFieldName,'')+'='+O.Get(keyFieldType,''));
VLEFields.ItemProps[II].EditStyle:=esPickList;
VLEFields.ItemProps[II].PickList.CommaText:='string,boolean,integer,float,largeint';
end;
end;
end;
function TJSONReportDataConfigFrame.SaveNotOKMessage: String;
Var
I : Integer;
N,V : String;
ft : TFieldType;
begin
Result:='';
if RBFile.Checked then
begin
if (FEData.FileName='') then
Result:=SErrNeedFileName
else if Not FileExists(FEData.FileName) then
Result:=Format(SErrFileNameDoesNotExist,[FEData.FileName])
end
else if RBURL.Checked and (EURL.Text='') then
Result:=SErrNeedURL
else if VLEFields.Strings.Count=0 then
Result:=SErrNeedFields
else
begin
I:=0;
While (Result='') and (I<VLEFields.Strings.Count) do
begin
VLEFields.Strings.GetNameValue(I,N,V);
if (N='') then
Result:=Format(SErrEmptyFieldsNotAllowed,[I+1])
else if not TryStringToFieldType(V,ft,False) then
Result:=Format(SErrUnsupportedJSONFieldType,[V]);
Inc(I);
end;
end;
end;
initialization
TJSONReportDataHandler.RegisterConfigClass(TJSONReportDataConfigFrame);
end.
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