MAPG-43 initial classes for DB handling

src/Interfaces/Database/IConnection.php

@@ -0,0 +1,20 @@
+<?php namespace MapGuesser\Interfaces\Database;
+
+interface IConnection
+{
+    public function startTransaction(): void;
+
+    public function commit(): void;
+
+    public function rollback(): void;
+
+    public function query(string $query): ?IResultSet;
+
+    public function multiQuery(string $query): array;
+
+    public function prepare(string $query): IStatement;
+
+    public function lastId(): int;
+
+    public function getAffectedRows(): int;
+}

src/Interfaces/Database/IResultSet.php

@@ -0,0 +1,16 @@
+<?php namespace MapGuesser\Interfaces\Database;
+
+interface IResultSet
+{
+    const FETCH_ASSOC = 0;
+
+    const FETCH_NUM = 1;
+
+    const FETCH_BOTH = 2;
+
+    public function fetch(int $type);
+
+    public function fetchAll(int $type);
+
+    public function fetchOneColumn(string $valueName, string $keyName);
+}

src/Interfaces/Database/IStatement.php

@@ -0,0 +1,8 @@
+<?php namespace MapGuesser\Interfaces\Database;
+
+interface IStatement
+{
+    public function execute(array $params): ?IResultSet;
+
+    public function getAffectedRows(): int;
+}