Create DbDriver and DI the driver + the python interface

WebServer/Controllers/Database.cs

@@ -0,0 +1,80 @@
+using Microsoft.Data.Sqlite;
+
+namespace DataBase {
+    
+    public class DbDriver : IDisposable {
+        
+        static SqliteConnection? singletonConnector = null;
+
+        public DbDriver() {
+            // Load in the datastore if not already loaded
+            if (singletonConnector == null) {
+                singletonConnector = new SqliteConnection("Data Source=test.db");
+                singletonConnector.Open();
+
+                // Create the key value store if not exist
+                using var command = singletonConnector.CreateCommand();
+                command.CommandText = """
+                    CREATE TABLE IF NOT EXISTS KeyValuePair (
+                        key TEXT NOT NULL,
+                        value TEXT,
+                        PRIMARY KEY(key)
+                    );
+                """;
+                command.ExecuteReader();
+            }
+        }
+
+        // Return Values from keys
+        public string Get(string Key) {
+            if (singletonConnector != null) {
+                using var command = singletonConnector.CreateCommand();
+                command.CommandText = """
+                    SELECT value
+                    FROM KeyValuePair
+                    Where key = $key;
+                """;
+                command.Parameters.AddWithValue("$key", Key);
+                command.ExecuteReader();
+                using var reader = command.ExecuteReader();
+                if (reader.Read()) {
+                    return reader.GetString(0);
+                }
+            }
+            return "";
+        }
+
+        // Set a key value pair in the store
+        public void Set(string Key, string Value) {
+            if (singletonConnector != null) {
+                using var command = singletonConnector.CreateCommand();
+                command.CommandText = """
+                    INSERT INTO KeyValuePair
+                    (key,value)
+                    VALUES
+                    ($key, $value)
+                    ON CONFLICT(key)
+                    DO UPDATE
+                    SET value = excluded.value;
+                """;
+                command.Parameters.AddWithValue("$key", Key);
+                command.Parameters.AddWithValue("$value", Value);
+                command.ExecuteReader();
+            }
+        }
+
+        // Deconstructor
+        ~DbDriver() {
+            Dispose();
+        }
+
+        // Deconstructor
+        public void Dispose() {
+            if (singletonConnector != null) {
+                singletonConnector.Close();
+                singletonConnector = null;
+            }
+        }
+    }
+
+}