+ // Get the list of previously backed up files from the database.
+ sqlite3 *db;
+
+ const char *dbname = "test.db";
+ int rc = sqlite3_open( dbname, &db );
+ if( SQLITE_OK != rc ) {
+ cerr << "Cannot open database: " << dbname << ". Error message is..." << endl;
+ cerr << sqlite3_errmsg(db) << endl;
+ }
+
+ char *sqliteErrMsg = 0;
+ file_set backed_up;
+ rc = sqlite3_exec( db, "select * from filedata;", populate_set, &backed_up, &sqliteErrMsg );
+ if( SQLITE_OK != rc ) {
+ cerr << "Problem with database. Message is..." << endl;
+ cerr << sqliteErrMsg << endl;
+ }
+
+ sqlite3_close( db );
+
+ for( file_set::iterator i = backed_up.begin(); i != backed_up.end(); ++i ) {
+ cout << (*i)->getFileName() << endl;
+ }
+
+ // Now divide the two sets into three sets (new, deleted and updated )
+ FileDataPtrCmp cmp;
+
+ file_set new_set;
+ set_difference( current.begin(), current.end(),
+ backed_up.begin(), backed_up.end(),
+ inserter( new_set, new_set.begin() ),
+ cmp );
+
+ file_set deleted;
+ set_difference( backed_up.begin(), backed_up.end(),
+ current.begin(), current.end(),
+ inserter( deleted, deleted.begin() ),
+ cmp );
+
+ // backed_up should *definitely* be the first set here
+ file_set updated;
+ set_difference( backed_up.begin(), backed_up.end(),
+ current.begin(), current.end(),
+ inserter( updated, updated.begin() ),
+ cmp );
+
+ // Now find the list of files to backup.
+ file_set backup_list;
+
+ // backup all new files
+ copy( new_set.begin(), new_set.end(), inserter( backup_list, backup_list.begin() ) );
+
+ // backup all the already backed-up files that have changed since the last
+ // backup date.
+ for( file_set::iterator i = updated.begin(); i != updated.end(); ++i ) {
+ if( (*i)->getLastBackupDate() < (*i)->getModifiedDate() ) {
+ backup_list.insert( *i );
+ }
+ }
+
+ // Now, sort the backup_list by filesize and build a list of up to SIZE
+
+ //
+ // Now, sort the non-backed-up list my last_backup_date and back-fill
+
+ // Remove deleted files from the database.
+
+ // Now, use the current set to update values in the database. You should copy
+ // last_backup_date dates from the backed_up set first. This will get all of
+ // the latest permissions but include the last_backup_date.
+
+ // Now, update the last_backup_date for all of the files that are in the list
+
+ // Clean-up
+ for( file_set::iterator i = backed_up.begin(); i != backed_up.end(); ++i ) { delete *i; }
+ for( file_set::iterator i = current.begin(); i != current.end(); ++i ) { delete *i; }