Added the save function

DBEngine.cpp

@@ -24,12 +24,27 @@ void DBEngine::createTable(Relation r){
 	tables.push_back(r); 
 	size++;
 }
+
+void DBEngine::storeCommands(string s){
+	commands.push_back(s);
+}
+
+void DBEngine::save(){
+	
+	ofstream file;
+	file.open("savefile.txt");
+	
+	for(int i = 0; i < commands.size(); ++i){
+		file << commands[i] << endl;
+	}
+	
+	file.close();
+}
 	
 vector<Relation> DBEngine::getRelations(){ 
 	return tables; 
 }
 
-	
 Relation& DBEngine::getTableFromName(string n){
 	for(int i = 0; i < tables.size(); i++){
 		if (tables[i].getTableName() == n){
@@ -38,19 +53,6 @@ Relation& DBEngine::getTableFromName(string n){
 	}
 }
 
-//currently writes nothing meaningful
-void DBEngine::saveToFile(vector<string> cmds){ 
-	ofstream file;
-	file.open("savefile.db");
-	
-	for(int i = 0; i < cmds.size(); ++i){
-		file << cmds[i] << endl;
-	}
-	
-	file.close();
-}
-
-
 Relation DBEngine::selection(string attName, string s, Relation r){
 	equality(attName, s, r);
 }
@@ -78,7 +80,6 @@ Relation DBEngine::product(string new_name, Relation r1, Relation r2){
 	Relation temp(new_name);
 	vector<Attribute> a1;
 	
-	
 	for(int i = 0; i < r1.getAttributes().size(); ++i){
 		a1.push_back(r1.getAttributes()[i]);
 	}
@@ -93,20 +94,6 @@ Relation DBEngine::product(string new_name, Relation r1, Relation r2){
 	vector<string> tuple2;
 	vector<string> result_tuple;
 	
-	
-	//Don't we need to find the bigger one to start first?
-	if(r1.getSize() >= r2.getSize())
-	{
-		//Combine tuples from relations into one, push back that tuple into the resultant relation via insertTuple
-		//Yeah have fun
-	}
-	
-	else if(r2.getSize() > r1.getSize())
-	{
-		//
-	}
-	
-	
 	return temp;
 }
 
@@ -129,6 +116,8 @@ void DBEngine::rename(Relation& r, vector<string> oldnames, vector<string> newna
 	}
 }
 
+
+
 /*Relation DBEngine::setUnion(Relation r1, Relation r2){
 	if (r1.getAttributeNames() != r2.getAttributeNames()){
 		cout << "Failure to union: the relations are not union-compatible";