/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _INTERNFILE_H_INCLUDED_
#define _INTERNFILE_H_INCLUDED_
/* @(#$Id: internfile.h,v 1.21 2008-10-08 16:15:22 dockes Exp $ (C) 2004 J.F.Dockes */
#include <string>
#include <vector>
#include <map>
#include <set>
using std::string;
using std::vector;
using std::map;
using std::set;
#include "pathut.h"
#include "Filter.h"
// Beware: the class changes according to RCL_USE_XATTR, so any file
// including this needs autoconfig.h
#include "autoconfig.h"
class RclConfig;
namespace Rcl {
class Doc;
}
struct stat;
/**
* A class to convert a file into possibly multiple documents in internal
* representation.
*/
class FileInterner {
public:
/**
* Get immediate parent for document.
*
* This is not in general the same as the "parent" document used
* with Rcl::Db::addOrUpdate(). The latter is generally the enclosing file.
*/
static bool getEnclosing(const string &url, const string &ipath,
string &eurl, string &eipath, string& udi);
/// Operation modifier flags
enum Flags {FIF_none, FIF_forPreview, FIF_doUseInputMimetype};
/**
* Identify and possibly decompress file, create adequate
* handler. The mtype parameter is only set when the object is
* created for previewing a file. Filter output may be
* different for previewing and indexing.
*
* @param fn file name
* @param stp pointer to updated stat struct.
* @param cnf Recoll configuration
* @param td temporary directory to use as working space if
* decompression needed. Must be private and will be wiped clean.
* @param mtype mime type if known. For a compressed file this is the
* mime type for the uncompressed version. This currently doubles up
* to indicate that this object is for previewing (not indexing).
*/
FileInterner(const string &fn, const struct stat *stp,
RclConfig *cnf, const string& td, int flags,
const string *mtype = 0);
~FileInterner();
/// Return values for internfile()
enum Status {FIError, FIDone, FIAgain};
/**
* Turn file or file part into Recoll document.
*
* For multidocument files (ie: mail folder), this must be called multiple
* times to retrieve the subdocuments
* @param doc output document
* @param ipath internal path. If set by caller, the specified subdoc will
* be returned. Else the next document according to current state will
* be returned, and the internal path will be set.
* @return FIError and FIDone are self-explanatory. If FIAgain is returned,
* this is a multi-document file, with more subdocs, and internfile()
* should be called again to get the following one(s).
*/
Status internfile(Rcl::Doc& doc, string &ipath);
/** Return the file's mimetype (useful for container files) */
const string& getMimetype() {return m_mimetype;}
/** We normally always return text/plain data. A caller can request
* that we stop conversion at the native document type (ie: extracting
* an email attachment and starting an external viewer)
*/
void setTargetMType(const string& tp) {m_targetMType = tp;}
/* In case we see an html version, it's set aside and can be recovered */
const string& get_html() {return m_html;}
/** Extract internal document into temporary file.
* This is used mainly for starting an external viewer for a
* subdocument (ie: mail attachment).
* @return true for success.
* @param temp output reference-counted temp file object (goes
* away magically). Only used if tofile.empty()
* @param tofile output file if not null
* @param cnf The recoll config
* @param fn The main document from which to extract
* @param ipath The internal path to the subdoc
* @param mtype The target mime type (we don't want to decode to text!)
*/
static bool idocToFile(TempFile& temp, const string& tofile,
RclConfig *cnf, const string& fn,
const string& ipath, const string& mtype);
const string& getReason() const {return m_reason;}
static void getMissingExternal(string& missing);
static void getMissingDescription(string& desc);
private:
static const unsigned int MAXHANDLERS = 20;
RclConfig *m_cfg;
string m_fn;
string m_mimetype; // Mime type for [uncompressed] file
bool m_forPreview;
string m_html; // Possibly set-aside html text for preview
string m_targetMType;
string m_reachedMType; // target or text/plain
// m_tdir and m_tfile are used only for decompressing input file if needed
const string& m_tdir;
string m_tfile;
#ifdef RCL_USE_XATTR
// Fields found in file extended attributes. This is kept here,
// not in the file-level handler because we are only interested in
// the top-level file, not any temp file necessitated by
// processing the internal doc hierarchy.
map<string, string> m_XAttrsFields;
#endif // RCL_USE_XATTR
// Filter stack, path to the current document from which we're
// fetching subdocs
vector<Dijon::Filter*> m_handlers;
// Temporary files used for decoding the current stack
bool m_tmpflgs[MAXHANDLERS];
vector<TempFile> m_tempfiles;
// Error data if any
string m_reason;
// Missing external programs
static set<string> o_missingExternal;
static map<string, set<string> > o_typesForMissing;
void tmpcleanup();
bool dijontorcl(Rcl::Doc&);
void collectIpathAndMT(Rcl::Doc&, string& ipath) const;
bool dataToTempFile(const string& data, const string& mt, string& fn);
void popHandler();
int addHandler();
void checkExternalMissing(const string& msg, const string& mt);
void processNextDocError(Rcl::Doc &doc, string& ipath);
#ifdef RCL_USE_XATTR
void reapXAttrs(const string& fn);
#endif
};
#endif /* _INTERNFILE_H_INCLUDED_ */