{ Classes for interpreting the output of svn commands

  Copyright (C) 2007 Vincent Snijders vincents@freepascal.org

  This library is free software; you can redistribute it and/or modify it
  under the terms of the GNU Library General Public License as published by
  the Free Software Foundation; either version 2 of the License, or (at your
  option) any later version with the following modification:

  As a special exception, the copyright holders of this library give you
  permission to link this library with independent modules to produce an
  executable, regardless of the license terms of these independent modules,and
  to copy and distribute the resulting executable under terms of your choice,
  provided that you also meet, for each linked independent module, the terms
  and conditions of the license of that module. An independent module is a
  module which is not derived from or based on this library. If you modify
  this library, you may extend this exception to your version of the library,
  but you are not obligated to do so. If you do not wish to do so, delete this
  exception statement from your version.

  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. See the GNU Library General Public License
  for more details.

  You should have received a copy of the GNU Library General Public License
  along with this library; if not, write to the Free Software Foundation,
  Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
}
unit svnclasses;

{$mode objfpc}{$H+}

interface

uses
  Classes, SysUtils,
  contnrs,
  DOM, XMLRead;
  
type

  TEntryKind = (ekUnknown, ekFile, ekDirectory);
  TCommitAction = (caUnknown, caModify, caAdd, caDelete);
  
  { TSvnBase }

  TSvnBase = class
  private
    procedure LoadFromXml(ADoc: TXMLDocument); virtual; abstract;
  public
    procedure LoadFromStream(s: TStream);
    procedure LoadFromFile(FileName: string);
  end;

  { TCommit }

  TCommit = class
  private
    FAuthor: string;
    FDate: string;
    FRevision: integer;
    procedure LoadFromNode(ANode: TDomNode);
  public
    procedure Clear;
    property Author: string read FAuthor write FAuthor;
    property Date: string read  FDate write FDate;
    property Revision: integer read FRevision write FRevision;
  end;
  
  { TRepository }

  TRepository = class
  private
    FRoot: string;
    FUUID: string;
    procedure LoadFromNode(ANode: TDomNode);
  public
    procedure Clear;
    property Root: string read FRoot write FRoot;
    property UUID: string read FUUID write FUUID;
  end;
  
  { TEntry }

  TEntry = class
  private
    FCommit: TCommit;
    FKind: TEntryKind;
    FPath: string;
    FRepository: TRepository;
    FRevision: integer;
    FUrl: string;
    procedure LoadFromNode(ANode: TDomNode);
  public
    constructor Create;
    destructor Destroy; override;
    procedure Clear;
    property Commit: TCommit read FCommit;
    property Kind: TEntryKind read FKind write FKind;
    property Path: string read FPath write FPath;
    property URL: string read FUrl write FUrl;
    property Repository: TRepository read FRepository;
    property Revision: integer read FRevision write FRevision;
  end;
  
  { TSvnInfo }

  TSvnInfo = class(TSvnBase)
  private
    FEntry: TEntry;
    procedure LoadFromXml(ADoc: TXMLDocument); override;
  public
    constructor Create;
    destructor Destroy; override;
    procedure Clear;
    property Entry: TEntry read FEntry;
  end;
  
  { TLogPath }

  TLogPath = class
  private
    FAction: TCommitAction;
    FCopyFromPath: string;
    FCopyFromRevision: integer;
    FPath: string;
    procedure LoadFromNode(ANode: TDomElement);
  public
    property Action : TCommitAction read FAction write FAction;
    property CopyFromRevision: integer read FCopyFromRevision write FCopyFromRevision;
    property CopyFromPath: string read FCopyFromPath write FCopyFromPath;
    property Path: string read FPath write FPath;
  end;

  { TLogEntry }

  TLogEntry = class
  private
    FAuthor: string;
    FDate: string;
    FLogPaths: TFPObjectList;
    FMessage: string;
    FRevision: integer;
    function GetLogPath(index: integer): TLogPath;
    function GetLogPathCount: integer;
    procedure LoadFromNode(ANode: TDOMElement);
  public
    constructor Create;
    destructor Destroy; override;
    property Author: string read FAuthor write FAuthor;
    property Date: string read  FDate write FDate;
    property Message: string read FMessage write FMessage;
    property Path[index: integer] :TLogPath read GetLogPath;
    property PathCount: integer read GetLogPathCount;
    property Revision: integer read FRevision write FRevision;
  end;
  
  { TSvnLog }

  TSvnLog = class(TSvnBase)
  private
    FLogEntries: TFPObjectList;
    function GetLogEntry(index: integer): TLogEntry;
    function GetLogEntryCount: integer;
    procedure LoadFromXml(ADoc: TXMLDocument); override;
  public
    constructor Create;
    destructor Destroy; override;
    procedure Clear;
    property LogEntry[index: integer] :TLogEntry read GetLogEntry;
    property LogEntryCount: integer read GetLogEntryCount;
  end;

implementation

const
  ActionStrings : array[TCommitAction] of char =
    (' ','M','A','D');

function GetChildTextContent(ANode: TDomNode; const AName: string) : string;
var
  ChildNode: TDOMNode;
begin
  Result := '';
  ChildNode :=  ANode.FindNode(AName);
  if assigned(ChildNode) then
    Result := ChildNode.TextContent;
end;

{ TSvnBase }

procedure TSvnBase.LoadFromStream(s: TStream);
var
  ADoc: TXMLDocument;
begin
  ReadXMLFile(ADoc, s);
  try
    LoadFromXml(ADoc);
  finally
    ADoc.Free;
  end;
end;

procedure TSvnBase.LoadFromFile(FileName: string);
var
  ADoc: TXMLDocument;
begin
  ReadXMLFile(ADoc, FileName);
  try
    LoadFromXml(ADoc);
  finally
    ADoc.Free;
  end;
end;

{ TSvnInfo }

procedure TSvnInfo.LoadFromXml(ADoc: TXMLDocument);
begin
  Clear;
  Entry.LoadFromNode(ADoc.DocumentElement.FindNode('entry'));
end;

constructor TSvnInfo.Create;
begin
  inherited Create;
  FEntry := TEntry.Create;
end;

destructor TSvnInfo.Destroy;
begin
  FEntry.Free;
  inherited Destroy;
end;

procedure TSvnInfo.Clear;
begin
  FEntry.Clear;
end;

{ TEntry }

procedure TEntry.LoadFromNode(ANode: TDomNode);
var
  EntryNode: TDomElement;
  KindString: string;
  UrlNode: TDomNode;
begin
  if ANode=nil then exit;
  
  if ANode.NodeType = ELEMENT_NODE then begin
    EntryNode := TDomElement(ANode);
    FRevision := StrToIntDef(EntryNode.GetAttribute('revision'),0);
    FPath := EntryNode.GetAttribute('path');
    KindString := EntryNode.GetAttribute('kind');
    if KindString = 'file' then
      FKind := ekFile
    else if KindString = 'dir' then
      FKind := ekDirectory
    else
      FKind := ekUnknown;
    UrlNode :=  EntryNode.FindNode('url');
    if assigned(UrlNode) then
      FUrl := UrlNode.TextContent;
      
    FRepository.LoadFromNode(EntryNode.FindNode('repository'));
    FCommit.LoadFromNode(EntryNode.FindNode('commit'));
  end;
end;

constructor TEntry.Create;
begin
  inherited Create;
  FCommit := TCommit.Create;
  FRepository := TRepository.Create;
end;

destructor TEntry.Destroy;
begin
  FCommit.Free;
  FRepository.Free;
  inherited Destroy;
end;

procedure TEntry.Clear;
begin
  FPath := '';
  FKind := ekUnknown;
  FUrl := '';
  FRevision := 0;
  FCommit.Clear;
  FRepository.Clear;
end;

{ TRepository }

procedure TRepository.LoadFromNode(ANode: TDomNode);
begin
  if ANode=nil then exit;

  FRoot := GetChildTextContent(ANode, 'root');
  FUUID :=  GetChildTextContent(ANode, 'uuid');
end;

procedure TRepository.Clear;
begin
  FRoot := '';
  FUUID := '';
end;

{ TCommit }

procedure TCommit.LoadFromNode(ANode: TDomNode);
begin
  if ANode=nil then exit;

  if ANode.NodeType = ELEMENT_NODE then begin
    FRevision := StrToIntDef(TDomElement(ANode).GetAttribute('revision'),0);
    FAuthor :=  GetChildTextContent(ANode, 'author');
    FDate :=  GetChildTextContent(ANode, 'date');
  end;
end;

procedure TCommit.Clear;
begin
  FAuthor := '';
  FDate := '';
  FRevision := 0;
end;

{ TSvnLog }

function TSvnLog.GetLogEntry(index: integer): TLogEntry;
begin
  Result := TLogEntry(FLogEntries[index]);
end;

function TSvnLog.GetLogEntryCount: integer;
begin
  Result := FLogEntries.Count;
end;

procedure TSvnLog.LoadFromXml(ADoc: TXMLDocument);
var
  LogEntryElement: TDomNode;
  NewLogEntry: TLogEntry;
begin
  Clear;

  LogEntryElement := ADoc.FindNode('log').FirstChild;
  while assigned(LogEntryElement) do begin
    if (LogEntryElement.NodeType=ELEMENT_NODE)
      and (LogEntryElement.NodeName='logentry') then
    begin
      NewLogEntry := TLogEntry.Create;
      NewLogEntry.LoadFromNode(TDomElement(LogEntryElement));
      FLogEntries.Add(NewLogEntry);
    end;
    LogEntryElement := LogEntryElement.NextSibling;
  end;
end;

constructor TSvnLog.Create;
begin
  inherited Create;
  FLogEntries := TFPObjectList.Create(true);
end;

destructor TSvnLog.Destroy;
begin
  FLogEntries.Free;
  inherited Destroy;
end;

procedure TSvnLog.Clear;
begin
  FLogEntries.Clear;
end;

{ TLogEntry }

function TLogEntry.GetLogPath(index: integer): TLogPath;
begin
  Result := TLogPath(FLogPaths[index]);
end;

function TLogEntry.GetLogPathCount: integer;
begin
  Result := FLogPaths.Count;
end;

procedure TLogEntry.LoadFromNode(ANode: TDOMElement);
var
  PathsELement: TDomNode;
  PathElement: TDomNode;
  NewLogPath: TLogPath;
begin
  FRevision := StrToIntDef(ANode.GetAttribute('revision'),0);
  FAuthor :=  GetChildTextContent(ANode, 'author');
  FDate :=  GetChildTextContent(ANode, 'date');
  FMessage := GetChildTextContent(ANode, 'msg');
  
  PathsElement := ANode.FindNode('paths');
  if assigned(PathsELement) then begin
    PathElement := PathsELement.FirstChild;
    while assigned(PathElement) do begin
      if (PathElement.NodeType=ELEMENT_NODE)
        and (PathElement.NodeName='path') then
      begin
        NewLogPath := TLogPath.Create;
        NewLogPath.LoadFromNode(TDomElement(PathElement));
        FLogPaths.Add(NewLogPath);
      end;
      PathElement := PathElement.NextSibling;
    end;
  end;
end;

constructor TLogEntry.Create;
begin
  inherited Create;
  FLogPaths := TFPObjectList.Create(true);
end;

destructor TLogEntry.Destroy;
begin
  FLogPaths.Free;
  inherited Destroy;
end;

{ TLogPath }

procedure TLogPath.LoadFromNode(ANode: TDomElement);
var
  ActionStr: string;
  i: TCommitAction;
begin
  FPath := ANode.TextContent;
  FCopyFromRevision := StrToIntDef(ANode.GetAttribute('copyfrom-rev'),0);
  FCopyFromPath := ANode.GetAttribute('copyfrom-path');
  ActionStr := ANode.GetAttribute('action');
  FAction := caUnknown;
  for i := low(TCommitAction) to high(TCommitAction) do
    if ActionStrings[i]=ActionStr then begin
      FAction := i;
      break;
    end;
end;

end.