sqlite.php

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<?php
class DbSQLite extends DbBase implements DbBaseInterface
{

    public $id_connection;
    public $last_result_query;
    protected $last_query;
    public $last_error;

    const DB_ASSOC = SQLITE_ASSOC;

    const DB_BOTH = SQLITE_BOTH;

    const DB_NUM = SQLITE_NUM;


    const TYPE_INTEGER = 'INTEGER';

    const TYPE_DATE = 'DATE';

    const TYPE_VARCHAR = 'VARCHAR';

    const TYPE_DECIMAL = 'DECIMAL';

    const TYPE_DATETIME = 'DATETIME';

    const TYPE_CHAR = 'CHAR';

    public function connect($config)
    {

        if (!extension_loaded('sqlite')) {
            throw new KumbiaException('Debe cargar la extensión de PHP llamada sqlite');
        }
        if ($this->id_connection = sqlite_open(APP_PATH . 'config/sql/' . $config['name'])) {
            return true;
        } else {
            throw new KumbiaException($this->error('No se puede conectar a la base de datos'));
        }
    }

    function query($sqlQuery)
    {
        $this->debug($sqlQuery);
        if ($this->logger) {
            Logger::debug($sqlQuery);
        }

        $this->last_query = $sqlQuery;
        if ($resultQuery = @sqlite_query($this->id_connection, $sqlQuery)) {
            $this->last_result_query = $resultQuery;
            return $resultQuery;
        } else {
            throw new KumbiaException($this->error(" al ejecutar <em>'$sqlQuery'</em>"));
        }
    }

    function close()
    {
        if ($this->id_connection) {
            return sqlite_close($this->id_connection);
        } else {
            return false;
        }
    }

    function fetch_array($resultQuery='', $opt=SQLITE_BOTH)
    {

        if (!$resultQuery) {
            $resultQuery = $this->last_result_query;
            if (!$resultQuery) {
                return false;
            }
        }

        return sqlite_fetch_array($resultQuery, $opt);
    }

    function __construct($config)
    {
        $this->connect($config);
    }

    function num_rows($resultQuery='')
    {
        if (!$resultQuery) {
            $resultQuery = $this->last_result_query;
            if (!$resultQuery) {
                return false;
            }
        }
        if (($numberRows = sqlite_num_rows($resultQuery)) !== false) {
            return $numberRows;
        } else {
            throw new KumbiaException($this->error());
        }
    }

    function field_name($number, $resultQuery='')
    {

        if (!$resultQuery) {
            $resultQuery = $this->last_result_query;
            if (!$resultQuery) {
                return false;
            }
        }
        if (($fieldName = sqlite_field_name($resultQuery, $number)) !== false) {
            return $fieldName;
        } else {
            throw new KumbiaException($this->error());
        }
    }

    function data_seek($number, $resultQuery='')
    {
        if (!$resultQuery) {
            $resultQuery = $this->last_result_query;
            if (!$resultQuery) {
                return false;
            }
        }
        if (($success = sqlite_rewind($resultQuery, $number)) !== false) {
            return $success;
        } else {
            throw new KumbiaException($this->error());
        }
    }

    function affected_rows($resultQuery='')
    {

        if (!$resultQuery) {
            $resultQuery = $this->last_result_query;
            if (!$resultQuery) {
                return false;
            }
        }
        if (($numberRows = pg_affected_rows($resultQuery)) !== false) {
            return $numberRows;
        } else {
            throw new KumbiaException($this->error());
        }
    }

    function error($err='')
    {
        if (!$this->id_connection) {
            $this->last_error = sqlite_last_error($this->id_connection) ? sqlite_last_error($this->id_connection) . $err : "[Error Desconocido en SQLite \"$err\"]";
            if ($this->logger) {
                Logger::error($this->last_error);
            }
            return $this->last_error;
        }
        $this->last_error = 'SQLite error: ' . sqlite_error_string(sqlite_last_error($this->id_connection));
        $this->last_error.= $err;
        if ($this->logger) {
            Logger::error($this->last_error);
        }
        return $this->last_error;
    }

    function no_error()
    {
        return 0; //Codigo de Error?
    }

    public function last_insert_id($table='', $primary_key='')
    {
        $last_id = $this->fetch_one("SELECT COUNT(*) FROM $table");
        return $last_id[0];
    }

    function table_exists($table, $schema='')
    {
        $table = addslashes(strtolower($table));
        if (strpos($table, ".")) {
            list($schema, $table) = explode(".", $table);
        }
        $num = $this->fetch_one("SELECT COUNT(*) FROM sqlite_master WHERE name = '$table'");
        return $num[0];
    }

    public function limit($sql)
    {
        $params = Util::getParams(func_get_args());
        $sql_new = $sql;

        if (isset($params['limit']) && is_numeric($params['limit'])) {
            $sql_new.=" LIMIT $params[limit]";
        }

        if (isset($params['offset']) && is_numeric($params['offset'])) {
            $sql_new.=" OFFSET $params[offset]";
        }

        return $sql_new;
    }

    public function drop_table($table, $if_exists=true)
    {
        if ($if_exists) {
            if ($this->table_exists($table)) {
                return $this->query("DROP TABLE $table");
            } else {
                return true;
            }
        } else {
            return $this->query("DROP TABLE $table");
        }
    }

    public function create_table($table, $definition, $index=array())
    {

    }

    public function list_tables()
    {
        return $this->fetch_all("SELECT name FROM sqlite_master WHERE type='table' " .
                "UNION ALL SELECT name FROM sqlite_temp_master " .
                "WHERE type='table' ORDER BY name");
    }

    public function describe_table($table, $schema='')
    {
        $fields = array();
        $results = $this->fetch_all("PRAGMA table_info($table)");
        //var_dump($results); die();
        foreach ($results as $field) {
            $fields[] = array(
                "Field" => $field["name"],
                "Type" => $field["type"],
                "Null" => $field["notnull"] == '0' ? "YES" : "NO",
                "Key" => $field['pk'] == 1 ? "PRI" : ""
            );
        }
        return $fields;
    }

    public function last_sql_query()
    {
        return $this->last_query;
    }

}