Implement drop table for the table builder, fix a warning, and made the message page's migration runnable multiple times (for now).

core/database.cpp

@@ -8,6 +8,7 @@ void Database::connect(const std::string &connection_str) {
 }
 
 QueryResult *Database::query(const std::string &query) {
+	return nullptr;
 }
 void Database::query_run(const std::string &query) {
 }

core/table_builder.cpp

@@ -40,6 +40,10 @@ TableBuilder *TableBuilder::next_row() {
 	return this;
 }
 
+TableBuilder *TableBuilder::drop_table(const std::string &name) {
+
+}
+
 void TableBuilder::finalize() {
 }
 

core/table_builder.h

@@ -16,6 +16,8 @@ public:
 	virtual TableBuilder *primary_key();
 	virtual TableBuilder *next_row();
 
+	virtual TableBuilder *drop_table(const std::string &name);
+
 	virtual void finalize();
 
 	TableBuilder();

database/mysql/mysql_table_builder.cpp

@@ -64,6 +64,11 @@ void MysqlTableBuilder::finalize() {
 	result += ");";
 }
 
+TableBuilder *MysqlTableBuilder::drop_table(const std::string &name) {
+	result += "DROP TABLE " + name + ";";
+
+	return this;
+}
 
 MysqlTableBuilder::MysqlTableBuilder() {
 }

database/mysql/mysql_table_builder.h

@@ -18,6 +18,8 @@ public:
 	TableBuilder *primary_key();
 	TableBuilder *next_row();
 
+	TableBuilder *drop_table(const std::string &name);
+
 	void finalize();
 
 	MysqlTableBuilder();

modules/message_page/message_page.cpp

@@ -43,6 +43,13 @@ void MessagePage::index(Request *request) {
 void MessagePage::migrate() {
 	TableBuilder *t = db->get_table_builder();
 
+	t->drop_table("message_page");
+	db->query_run(t->result);
+	
+	printf("%s\n", t->result.c_str());
+
+	t->result.clear();
+
 	t->create_table("message_page")->integer("id")->auto_increment()->primary_key()->next_row()->varchar("text", 30)->finalize();
 
 	printf("%s\n", t->result.c_str());