#ifndef lint
static char rcsid[] = "@(#$Id: indexer.cpp,v 1.14 2005-11-10 08:47:49 dockes Exp $ (C) 2004 J.F.Dockes";
#endif
#include <stdio.h>
#include <sys/stat.h>
#include <unistd.h>
#include <strings.h>
#include <iostream>
#include <list>
#include <map>
#include "pathut.h"
#include "conftree.h"
#include "rclconfig.h"
#include "fstreewalk.h"
#include "rcldb.h"
#include "readfile.h"
#include "indexer.h"
#include "csguess.h"
#include "transcode.h"
#include "debuglog.h"
#include "internfile.h"
#include "smallut.h"
#include "wipedir.h"
using namespace std;
#ifndef deleteZ
#define deleteZ(X) {delete X;X = 0;}
#endif
/// A class to index a list of top directories into one database.
///
/// Inherits FsTreeWalkerCB so that its processone() method is
/// called by the file-system tree walk code for each file and
/// directory, and keeps all state used while indexing a
/// directory tree.
class DbIndexer : public FsTreeWalkerCB {
FsTreeWalker walker;
RclConfig *config;
string dbdir;
list<string> *topdirs;
Rcl::Db db;
string tmpdir;
public:
/// Constructor does nothing but store parameters
DbIndexer(RclConfig *cnf, const string &dbd, list<string> *top)
: config(cnf), dbdir(dbd), topdirs(top) {}
virtual ~DbIndexer() {
// Maybe clean up temporary directory
if (tmpdir.length()) {
wipedir(tmpdir);
if (rmdir(tmpdir.c_str()) < 0) {
LOGERR(("DbIndexer::~DbIndexer: cant clear temp dir %s\n",
tmpdir.c_str()));
}
}
}
/// Start indexing.
bool index();
/// Tree walker callback method
FsTreeWalker::Status
processone(const std::string &, const struct stat *, FsTreeWalker::CbFlag);
};
/// Top level file system tree index method for updating a given database.
///
/// We create the temporary directory, open the database, then call a
/// file system walk for each top-level directory.
/// When walking is done, we create the stem databases and close the
/// main db.
bool DbIndexer::index()
{
string tdir;
if (!maketmpdir(tmpdir)) {
LOGERR(("DbIndexer: cant create temp directory\n"));
return false;
}
if (!db.open(dbdir, Rcl::Db::DbUpd)) {
LOGERR(("DbIndexer::index: error opening database in %s\n",
dbdir.c_str()));
return false;
}
for (list<string>::const_iterator it = topdirs->begin();
it != topdirs->end(); it++) {
LOGDEB(("DbIndexer::index: Indexing %s into %s\n", it->c_str(),
dbdir.c_str()));
// Set the current directory in config so that subsequent
// getConfParams() will get local values
config->setKeyDir(*it);
// Set up skipped patterns for this subtree. This probably should be
// done in the directory change code in processone() instead.
{
walker.clearSkippedNames();
string skipped;
if (config->getConfParam("skippedNames", skipped)) {
list<string> skpl;
ConfTree::stringToStrings(skipped, skpl);
list<string>::const_iterator it;
for (it = skpl.begin(); it != skpl.end(); it++) {
walker.addSkippedName(*it);
}
}
}
// Walk the directory tree
if (walker.walk(*it, *this) != FsTreeWalker::FtwOk) {
LOGERR(("DbIndexer::index: error while indexing %s\n",
it->c_str()));
db.close();
return false;
}
}
// Get rid of all database entries that don't exist in the
// filesystem anymore.
db.purge();
// Create stemming databases
string slangs;
if (config->getConfParam("indexstemminglanguages", slangs)) {
list<string> langs;
ConfTree::stringToStrings(slangs, langs);
for (list<string>::const_iterator it = langs.begin();
it != langs.end(); it++) {
db.createStemDb(*it);
}
}
if (!db.close()) {
LOGERR(("DbIndexer::index: error closing database in %s\n",
dbdir.c_str()));
return false;
}
return true;
}
/// This method gets called for every file and directory found by the
/// tree walker.
///
/// It checks with the db if the file has changed and needs to be
/// reindexed. If so, it calls internfile() which will identify the
/// file type and call an appropriate handler to convert the document into
/// internal format, which we then add to the database.
///
/// Accent and majuscule handling are performed by the db module when doing
/// the actual indexing work. The Rcl::Doc created by internfile()
/// contains pretty raw utf8 data.
FsTreeWalker::Status
DbIndexer::processone(const std::string &fn, const struct stat *stp,
FsTreeWalker::CbFlag flg)
{
// If we're changing directories, possibly adjust parameters (set
// the current directory in configuration object)
if (flg == FsTreeWalker::FtwDirEnter ||
flg == FsTreeWalker::FtwDirReturn) {
config->setKeyDir(fn);
return FsTreeWalker::FtwOk;
}
// Check db up to date ?
if (!db.needUpdate(fn, stp)) {
LOGDEB(("indexfile: up to date: %s\n", fn.c_str()));
return FsTreeWalker::FtwOk;
}
FileInterner interner(fn, config, tmpdir);
FileInterner::Status fis = FileInterner::FIAgain;
while (fis == FileInterner::FIAgain) {
Rcl::Doc doc;
string ipath;
fis = interner.internfile(doc, ipath);
if (fis == FileInterner::FIError)
break;
// Set the date if this was not done in the document handler
if (doc.fmtime.empty()) {
char ascdate[20];
sprintf(ascdate, "%ld", long(stp->st_ctime));
doc.fmtime = ascdate;
}
// Internal access path for multi-document files
doc.ipath = ipath;
// Do database-specific work to update document data
if (!db.add(fn, doc))
return FsTreeWalker::FtwError;
}
return FsTreeWalker::FtwOk;
}
////////////////////////////////////////////////////////////////////////////
// ConIndexer methods: ConfIndexer is the top-level object, that can index
// multiple directories to multiple databases.
ConfIndexer::~ConfIndexer()
{
deleteZ(dbindexer);
}
bool ConfIndexer::index()
{
ConfTree *conf = config->getConfig();
// Retrieve the list of directories to be indexed.
string topdirs;
if (conf->get("topdirs", topdirs, "") == 0) {
LOGERR(("ConfIndexer::index: no top directories in configuration\n"));
return false;
}
list<string> tdl; // List of directories to be indexed
if (!ConfTree::stringToStrings(topdirs, tdl)) {
LOGERR(("ConfIndexer::index: parse error for directory list\n"));
return false;
}
// Each top level directory to be indexed can be associated with a
// different database. We first group the directories by database:
// it is important that all directories for a database be indexed
// at once so that deleted file cleanup works
list<string>::iterator dirit;
map<string, list<string> > dbmap;
map<string, list<string> >::iterator dbit;
for (dirit = tdl.begin(); dirit != tdl.end(); dirit++) {
string db;
string dir = path_tildexpand(*dirit);
if (conf->get("dbdir", db, dir) == 0) {
LOGERR(("ConfIndexer::index: no database directory in "
"configuration for %s\n", dir.c_str()));
return false;
}
db = path_tildexpand(db);
dbit = dbmap.find(db);
if (dbit == dbmap.end()) {
list<string> l;
l.push_back(dir);
dbmap[db] = l;
} else {
dbit->second.push_back(dir);
}
}
// Index each directory group in turn
for (dbit = dbmap.begin(); dbit != dbmap.end(); dbit++) {
//cout << dbit->first << " -> ";
//list<string>::const_iterator dit;
//for (dit = dbit->second.begin(); dit != dbit->second.end(); dit++) {
// cout << *dit << " ";
//}
//cout << endl;
dbindexer = new DbIndexer(config, dbit->first, &dbit->second);
if (!dbindexer->index()) {
deleteZ(dbindexer);
return false;
}
deleteZ(dbindexer);
}
return true;
}