80 lines
2.4 KiB
PHP
80 lines
2.4 KiB
PHP
<?php
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class database {
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const SCHEMA_VERSION = 2;
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protected SQLite3 $link;
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public function __construct(string $db_path) {
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$this->link = new SQLite3($db_path);
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$this->link->enableExceptions(true);
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$this->upgradeSchema();
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}
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protected function upgradeSchema() {
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$cur = $this->getSchemaVersion();
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if ($cur < 1) {
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$this->link->exec("CREATE TABLE users (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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username TEXT,
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password TEXT
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)");
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}
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if ($cur < 2) {
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$this->link->exec("CREATE TABLE vk_processed (
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last_message_time INTEGER
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)");
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$this->link->exec("INSERT INTO vk_processed (last_message_time) VALUES (0)");
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}
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$this->syncSchemaVersion();
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}
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protected function getSchemaVersion() {
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return $this->link->query("PRAGMA user_version")->fetchArray()[0];
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}
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protected function syncSchemaVersion() {
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$this->link->exec("PRAGMA user_version=".self::SCHEMA_VERSION);
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}
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protected function prepareQuery(string $sql): string {
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if (func_num_args() > 1) {
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$mark_count = substr_count($sql, '?');
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$positions = array();
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$last_pos = -1;
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for ($i = 0; $i < $mark_count; $i++) {
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$last_pos = strpos($sql, '?', $last_pos + 1);
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$positions[] = $last_pos;
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}
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for ($i = $mark_count - 1; $i >= 0; $i--) {
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$arg_val = func_get_arg($i + 1);
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if (is_null($arg_val)) {
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$v = 'NULL';
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} else {
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$v = '\''.$this->link->escapeString($arg_val) . '\'';
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}
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$sql = substr_replace($sql, $v, $positions[$i], 1);
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}
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}
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return $sql;
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}
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public function query(string $sql, ...$params): SQLite3Result {
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return $this->link->query($this->prepareQuery($sql, ...$params));
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}
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public function exec(string $sql, ...$params) {
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return $this->link->exec($this->prepareQuery($sql, ...$params));
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}
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public function querySingle(string $sql, ...$params) {
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return $this->link->querySingle($this->prepareQuery($sql, ...$params));
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}
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public function querySingleRow(string $sql, ...$params) {
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return $this->link->querySingle($this->prepareQuery($sql, ...$params), true);
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}
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} |