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88 lines
2.4 KiB
88 lines
2.4 KiB
#include "Schema.h"
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#include <io/debug.h>
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#include "migrations/1624829187_create_events.h"
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namespace db {
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namespace db_builder = db::migrations::builder;
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Schema::Schema(sql::Database* db) : m_db(db) {
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}
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uint32_t Schema::get_user_version() const {
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try {
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int user_version = m_db->execAndGet("PRAGMA user_version;");
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return user_version;
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} catch (std::exception& e) {
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std::cout << "Exception: " << e.what() << std::endl;
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return -1;
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}
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}
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void Schema::set_user_version(uint32_t version) {
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try {
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m_db->exec("PRAGMA user_version = " + std::to_string(version) + ";");
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m_user_version = version;
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} catch (std::exception& e) {
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std::cout << "Exception: " << e.what() << std::endl;
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}
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}
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void Schema::set_savepoint() {
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try {
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m_db->exec("BEGIN;");
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m_db->exec("SAVEPOINT " + m_migration_savepoint + ";");
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} catch (std::exception& e) {
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std::cout << "Exception: " << e.what() << std::endl;
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}
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}
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void Schema::rollback_migrations() {
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try {
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m_db->exec("ROLLBACK TO " + m_migration_savepoint + ";");
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} catch (std::exception& e) {
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std::cout << "Exception: " << e.what() << std::endl;
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}
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}
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void Schema::commit_migrations() {
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try {
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m_db->exec("COMMIT;");
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} catch (std::exception& e) {
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std::cout << "Exception: " << e.what() << std::endl;
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}
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}
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uint32_t Schema::run_migrations() {
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assemble_migrations();
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if(migrations.begin() == migrations.end()) {
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DEBUG << "No migrations found...";
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return ERROR_NO_MIGRATIONS;
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}
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set_savepoint();
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uint32_t user_version = get_user_version();
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for(auto const& [epoch, migration] : migrations) {
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if(epoch <= user_version) {
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DEBUG << "Skipping: " << migration->get_migration_name();
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continue;
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}
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std::cout << "migrating: " << migration->get_migration_name() << std::endl;
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try {
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m_db->exec(migration->get_statement());
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} catch (std::exception& e) {
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std::cout << "Exception: " << e.what() << std::endl;
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std::cout << "Rolling back migrations..." << std::endl;
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rollback_migrations();
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return ERROR_FAULTY_MIGRATION;
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}
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}
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commit_migrations();
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set_user_version(migrations.rbegin()->first);
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return 0;
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}
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void Schema::assemble_migrations() {
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migrations.emplace(1624829187, new db::migrations::m1624829187_create_events());
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}
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}
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