Just fixed a few things that I thought about last night

[backups/.git] / main.cc

diff --git a/main.cc b/main.cc
index c930155cae77a6ec538d9f90511da1efd0ee3b1d..407d572f8a9c46584e9713017e4ed65a0d4383c1 100644 (file)
--- a/main.cc
+++ b/main.cc
@@ -2,6 +2,7 @@
 #include <iterator>
 #include <vector>
 #include <algorithm>
+#include <cassert>
 
 #include <sqlite3.h>
 
@@ -44,7 +45,7 @@ int populate_set( void *files_v, int, char **vals, char ** ) {
 int main() {
   string file_string;
 
-  file_set current_files;
+  file_set current;
 
   // Parse the list of files on stdin
   do {
@@ -57,7 +58,7 @@ 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],
@@ -72,44 +73,96 @@ int main() {
 
   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;
-  }
+  assert( SQLITE_OK == rc );
 
   char *sqliteErrMsg = 0;
-  file_set previous_files;
-  rc = sqlite3_exec( db, "select * from filedata;", populate_set, &previous_files, &sqliteErrMsg );
-  if( SQLITE_OK != rc ) {
-    cerr << "Problem with database.  Message is..." << endl;
-    cerr << sqliteErrMsg << endl;
-  }
-
-  sqlite3_close( db );
+  file_set backed_up;
+  rc = sqlite3_exec( db, "select * from filedata;", populate_set, &backed_up, &sqliteErrMsg );
+  assert( SQLITE_OK == rc );
 
-  for( file_set::iterator i = previous_files.begin(); i != previous_files.end(); ++i ) {
-    cout << (*i)->getFileName() << endl;
-  }
+  rc = sqlite3_close( db );
+  assert( SQLITE_OK == rc );
 
-  // Now divide the two sets into three sets (union and set differences)
+  // Now divide the two sets into three sets (new, deleted and updated )
   FileDataPtrCmp cmp;
 
-  file_set new_set;
-  set_difference( current_files.begin(),  current_files.end(),
-                  previous_files.begin(), previous_files.end(),
-                  inserter( new_set, new_set.begin() ),
+  file_set added;
+  set_difference( current.begin(),   current.end(),
+                  backed_up.begin(), backed_up.end(),
+                  inserter( added, added.begin() ),
                   cmp );
 
-  file_set deleted_set;
-  set_difference( previous_files.begin(), previous_files.end(),
-                  current_files.begin(),  current_files.end(),
-                  inserter( deleted_set, deleted_set.begin() ),
+  file_set deleted;
+  set_difference( backed_up.begin(), backed_up.end(),
+                  current.begin(),   current.end(),
+                  inserter( deleted, deleted.begin() ),
                   cmp );
 
-  // previous_files *should* definitely be the first set here
-  file_set common_set;
-  set_difference( previous_files.begin(), previous_files.end(),
-                  current_files.begin(),  current_files.end(),
-                  inserter( common_set, common_set.begin() ),
-                  cmp );
+  file_set updated;
+  set_union( current.begin(),   current.end(),
+             backed_up.begin(), backed_up.end(),
+             inserter( updated, updated.begin() ),
+             cmp );
+
+  { // This little block will copy the last_backup_date from the second set to the first
+    file_set updated_mirror;
+    set_union( current.begin(),   current.end(),
+               backed_up.begin(), backed_up.end(),
+               inserter( updated_mirror, updated_mirror.begin() ),
+               cmp );
+
+    // TODO Now we need to copy the last_backup_date from 
+    file_set::iterator i = updated.begin(), j = updated_mirror.begin();
+    for( ; i != updated.end(); ++i, ++j ) {
+      (*i)->setLastBackupDate( (*j)->getLastBackupDate() );
+    }
+  }
+
+  // Now find the list of files to backup.
+  file_set backup_list;
+
+  // backup all new files
+  copy( added.begin(), added.end(), inserter( backup_list, backup_list.begin() ) );
+
+  // backup 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.
+  // TODO CNB You were working in here.  Actually, just delete all records in
+  // the database and re-populate with the current list.
+  const char *delete_sql = "delete from filedata where filename = :filename";
+  sqlite3_stmt *ppStmt;
+
+  sqlite3_prepare( db, delete_sql, -1, &ppStmt, NULL );
+  assert( NULL != ppStmt );
+
+  for( file_set::iterator i = deleted.begin(); i != deleted.end(); ++i ) {
+    const string &name = (*i)->getFileName();
+
+    rc = sqlite3_bind_text( ppStmt, 1, name.data(), name.size(), SQLITE_TRANSIENT );
+    assert( SQLITE_OK == rc );
+
+    rc = sqlite3_step( ppStmt );
+    assert( SQLITE_OK == rc );
+  }
+  rc = sqlite3_finalize( ppStmt );
+  assert( SQLITE_OK == rc );
+
+  // 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; }
 }