1 files changed, 90 insertions, 0 deletions
diff --git a/engine/database/SQLiteConnection.php b/engine/database/SQLiteConnection.php
new file mode 100644
index 0000000..f124ced
--- /dev/null
+++ b/engine/database/SQLiteConnection.php
@@ -0,0 +1,90 @@
+<?php
+
+class SQLiteConnection extends CommonDatabase {
+
+    const SCHEMA_VERSION = 2;
+
+    protected SQLite3 $link;
+
+    public function __construct(string $db_path) {
+        $will_create = !file_exists($db_path);
+        $this->link = new SQLite3($db_path);
+        if ($will_create)
+            setperm($db_path);
+        $this->link->enableExceptions(true);
+        $this->upgradeSchema();
+    }
+
+    protected function upgradeSchema() {
+        $cur = $this->getSchemaVersion();
+        if ($cur == self::SCHEMA_VERSION)
+            return;
+
+        if ($cur < 1) {
+            $this->link->exec("CREATE TABLE users (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                username TEXT,
+                password TEXT
+            )");
+        }
+        if ($cur < 2) {
+            $this->link->exec("CREATE TABLE vk_processed (
+                last_message_time INTEGER
+            )");
+            $this->link->exec("INSERT INTO vk_processed (last_message_time) VALUES (0)");
+        }
+        $this->syncSchemaVersion();
+    }
+
+    protected function getSchemaVersion() {
+        return $this->link->query("PRAGMA user_version")->fetchArray()[0];
+    }
+
+    protected function syncSchemaVersion() {
+        $this->link->exec("PRAGMA user_version=".self::SCHEMA_VERSION);
+    }
+
+    public function query(string $sql, ...$params): SQLite3Result {
+        return $this->link->query($this->prepareQuery($sql, ...$params));
+    }
+
+    public function exec(string $sql, ...$params) {
+        return $this->link->exec($this->prepareQuery($sql, ...$params));
+    }
+
+    public function querySingle(string $sql, ...$params) {
+        return $this->link->querySingle($this->prepareQuery($sql, ...$params));
+    }
+
+    public function querySingleRow(string $sql, ...$params) {
+        return $this->link->querySingle($this->prepareQuery($sql, ...$params), true);
+    }
+
+    public function insertId(): int {
+        return $this->link->lastInsertRowID();
+    }
+
+    public function escape(string $s): string {
+        return $this->link->escapeString($s);
+    }
+
+    public function fetch($q): ?array {
+        // TODO: Implement fetch() method.
+    }
+
+    public function fetchAll($q): ?array {
+        // TODO: Implement fetchAll() method.
+    }
+
+    public function fetchRow($q): ?array {
+        // TODO: Implement fetchRow() method.
+    }
+
+    public function result($q, int $field = 0) {
+        return $q?->fetchArray()[$field];
+    }
+
+    public function numRows($q): ?int {
+        // TODO: Implement numRows() method.
+    }
+}
+\ No newline at end of file