mytinytodo/src/includes/class.db.sqlite3.php

<?php

/*
    This file is a part of myTinyTodo.
    (C) Copyright 2009,2019-2022 Max Pozdeev <maxpozdeev@gmail.com>
    Licensed under the GNU GPL version 2 or any later. See file COPYRIGHT for details.
*/

class DatabaseResult_Sqlite3 extends DatabaseResult_Abstract
{
    /** @var PDOStatement */
    protected $q;
    protected $affected;

    function __construct($dbh, $query, $resultless = 0)
    {
        // use with DELETE, INSERT, UPDATE
        if ($resultless)
        {
            $this->affected = $dbh->exec($query); //throws PDOException
        }
        // SELECT
        else
        {
            $this->q = $dbh->query($query); //throws PDOException
            $this->affected = $this->q->rowCount();
        }
    }

    function fetchRow()
    {
        return $this->q->fetch(PDO::FETCH_NUM);
    }

    function fetchAssoc()
    {
        return $this->q->fetch(PDO::FETCH_ASSOC);
    }

    function rowsAffected()
    {
        return $this->affected;
    }

}

class Database_Sqlite3 extends Database_Abstract
{
    /** @var PDO */
    protected $dbh;
    protected $affected = null;

    function __construct()
    {
    }

    function connect($params)
    {
        $filename = $params['filename'];
        $options = array(
            PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION
        );
        $this->dbh = new PDO("sqlite:$filename", null, null, $options); //throws PDOException
        return true;
    }

    /*
        SELECT queries for single row
    */
    function sq($query, $p = NULL)
    {
        $q = $this->_dq($query, $p);

        $res = $q->fetchRow();
        if ($res === false) return NULL;

        if (sizeof($res) > 1) return $res;
        else return $res[0];
    }

    /*
        SELECT queries for single row
    */
    function sqa($query, $p = NULL)
    {
        $q = $this->_dq($query, $p);

        $res = $q->fetchAssoc();
        if ($res === false) return NULL;
        return $res;
    }

    /*
        SELECT queries for multiple rows
    */
    function dq($query, $p = NULL) : DatabaseResult_Abstract
    {
        return $this->_dq($query, $p);
    }

    /*
        for resultless queries like INSERT,UPDATE,DELETE
    */
    function ex($query, $p = NULL)
    {
        $dbr = $this->_dq($query, $p, 1);
        return $this->affected();
    }

    private function _dq($query, $p = NULL, $resultless = 0) : DatabaseResult_Abstract
    {
        if (!isset($p)) $p = array();
        elseif (!is_array($p)) $p = array($p);

        $m = explode('?', $query);

        if (sizeof($p) > 0)
        {
            if (sizeof($m) < sizeof($p)+1) {
                throw new Exception("params to set MORE than query params");
            }
            if (sizeof($m) > sizeof($p)+1) {
                throw new Exception("params to set LESS than query params");
            }
            $query = "";
            for ($i=0; $i<sizeof($m)-1; $i++) {
                $query .= $m[$i]. (is_null($p[$i]) ? 'NULL' : $this->quote($p[$i]));
            }
            $query .= $m[$i];
        }
        $this->lastQuery = $query;
        $dbr = new DatabaseResult_Sqlite3($this->dbh, $query, $resultless);
        $this->affected = $dbr->rowsAffected();
        return $dbr;
    }

    function affected()
    {
        return $this->affected;
    }

    function quote($s)
    {
        return $this->dbh->quote($s);
    }

    function quoteForLike($format, $s)
    {
        $s = str_replace(array('\\','%','_'), array('\\\\','\%','\_'), $s);
        return $this->dbh->quote(sprintf($format, $s)). " ESCAPE '\'";
    }

    function lastInsertId($name = null)
    {
        return $this->dbh->lastInsertId();
    }

    function tableExists($table)
    {
        $exists = $this->sq("SELECT 1 FROM sqlite_master WHERE type='table' AND name=?", $table);
        if ($exists == "1") {
          return true;
        }
        $exists = $this->sq("SELECT 1 FROM sqlite_temp_master WHERE type='table' AND name=?", $table);
        if ($exists == "1") {
          return true;
        }
        return false;
    }

    function tableFieldExists($table, $field): bool
    {
        $q = $this->dq("PRAGMA table_info(". $this->quote($table). ")");
        while ($r = $q->fetchRow()) {
            if ($r[1] == $field) return true;
        }
        return false;
    }
}