1 files changed, 54 insertions, 0 deletions

diff --git a/src/data.cpp b/src/data.cpp
new file mode 100644
index 0000000..78cb500
--- /dev/null
+++ b/src/data.cpp
@@ -0,0 +1,54 @@
+#include <memory>
+#include <string>
+#include <expected>
+
+#include <mw/database.hpp>
+#include <mw/error.hpp>
+#include <mw/utils.hpp>
+
+#include "data.hpp"
+
+namespace
+{
+
+} // namespace
+
+mw::E<std::unique_ptr<DataSourceSQLite>>
+DataSourceSQLite::fromFile(const std::string& db_file)
+{
+    auto data_source = std::make_unique<DataSourceSQLite>();
+    ASSIGN_OR_RETURN(data_source->db, mw::SQLite::connectFile(db_file));
+
+    // Perform schema upgrade here.
+    //
+    // data_source->upgradeSchema1To2();
+
+    // Update this line when schema updates.
+    DO_OR_RETURN(data_source->setSchemaVersion(1));
+    DO_OR_RETURN(data_source->db->execute(
+        "CREATE TABLE IF NOT EXISTS Users "
+        "(id INTEGER PRIMARY KEY, openid_uid TEXT, name TEXT);"));
+    DO_OR_RETURN(data_source->db->execute(
+        "CREATE TABLE IF NOT EXISTS LinkItems "
+        "(id INTEGER PRIMARY KEY,"
+        " FOREIGN KEY(owner_id) REFERENCES Users(id) NOT NULL,"
+        " FOREIGN KEY(parent_id) REFERENCES LinkItems(id),"
+        " name TEXT NOT NULL, url TEXT, description TEXT,"
+        " visibility INTEGER NOT NULL, time INTEGER NOT NULL);"));
+    return data_source;
+}
+
+mw::E<std::unique_ptr<DataSourceSQLite>> DataSourceSQLite::newFromMemory()
+{
+    return fromFile(":memory:");
+}
+
+mw::E<int64_t> DataSourceSQLite::getSchemaVersion() const
+{
+    return db->evalToValue<int64_t>("PRAGMA user_version;");
+}
+
+mw::E<void> DataSourceSQLite::setSchemaVersion(int64_t v) const
+{
+    return db->execute(std::format("PRAGMA user_version = {};", v));
+}