Routine commit

[backups/.git] / main.cc

diff --git a/main.cc b/main.cc
index 8ffd418cc9ec289ae0ab8dc8eaa33dc23ad1ed3c..89c17429f0338f29891e8c5feb0f0cc4864d678b 100644 (file)
--- a/main.cc
+++ b/main.cc
@@ -1,9 +1,7 @@
 #include <iostream>
 #include <iterator>
-#include <string>
 #include <vector>
 #include <algorithm>
-#include <set>
 
 #include <sqlite3.h>
 
@@ -30,39 +28,23 @@ vector<string> split( const string &line, char c, int limit = -1 ) {
   return out;
 }
 
-int callback( void *NotUsed, int argc, char **argv, char **azColName ) {
-  int i;
-  for( int i = 0; i < argc; ++i ) {
-    cout << azColName[i] << " = " << ( argv[i] ? argv[i] : "NULL" ) << endl;
-  }
-  cout << endl;
+// Callback function for getting files from the database
+int populate_set( void *files_v, int, char **vals, char ** ) {
+  file_set *files = reinterpret_cast<file_set*>( files_v );
+  files->insert( new FileData( vals[0][0],
+        vals[1],
+        vals[2],
+        vals[3],
+        atoi( vals[4] ),
+        atoi( vals[5] ),
+        vals[6]) );
   return 0;
 }
 
-void sql_experimenting() {
-  sqlite3 *db;
-  char *sqliteErrMsg = 0;
-  int rc;
-
-  const char *dbname = "test.db";
-  rc = sqlite3_open( dbname, &db );
-  if( SQLITE_OK != rc ) {
-    cerr << "Cannot open database: " << dbname << ".  Error message is..." << endl;
-    cerr << sqlite3_errmsg(db) << endl;
-  }
-
-  rc = sqlite3_exec( db, "select * from filedata;", callback, 0, &sqliteErrMsg );
-  if( SQLITE_OK != rc ) {
-    cerr << "Problem with database.  Message is..." << endl;
-    cerr << sqliteErrMsg << endl;
-  }
-
-  sqlite3_close( db );
-}
-
 int main() {
   string file_string;
-  set<FileData*,FileDataPtrCmp> current_files;
+
+  file_set current;
 
   // Parse the list of files on stdin
   do {
@@ -75,7 +57,7 @@ int main() {
       // type perms user group size datemodified name (7 total)
       // f 0600 cnb cnb 424 20051015205340 ./.git/index
       vector<string> vals = split( file_string, ' ', 7 );
-      current_files.insert( new FileData( vals[0][0],
+      current.insert( new FileData( vals[0][0],
             vals[1],
             vals[2],
             vals[3],
@@ -85,5 +67,80 @@ int main() {
     }
   } while( ! cin.eof() );
 
-  set<FileData*,FileDataPtrCmp> previous_files;
+  // 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; }
 }