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91 lines
3.7 KiB
91 lines
3.7 KiB
<?php
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/** @license MIT
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* Copyright 2017 J. King, Dustin Wilson et al.
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* See LICENSE and AUTHORS files for details */
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declare(strict_types=1);
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namespace JKingWeb\Arsse\Db;
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use JKingWeb\Arsse\Misc\Date;
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use JKingWeb\Arsse\Misc\ValueInfo;
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abstract class AbstractStatement implements Statement {
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use SQLState;
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const TYPE_NORM_MAP = [
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self::T_INTEGER => ValueInfo::M_NULL | ValueInfo::T_INT,
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self::T_STRING => ValueInfo::M_NULL | ValueInfo::T_STRING,
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self::T_BOOLEAN => ValueInfo::M_NULL | ValueInfo::T_BOOL,
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self::T_DATETIME => ValueInfo::M_NULL | ValueInfo::T_DATE,
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self::T_FLOAT => ValueInfo::M_NULL | ValueInfo::T_FLOAT,
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self::T_BINARY => ValueInfo::M_NULL | ValueInfo::T_STRING,
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self::T_NOT_NULL + self::T_INTEGER => ValueInfo::T_INT,
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self::T_NOT_NULL + self::T_STRING => ValueInfo::T_STRING,
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self::T_NOT_NULL + self::T_BOOLEAN => ValueInfo::T_BOOL,
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self::T_NOT_NULL + self::T_DATETIME => ValueInfo::T_DATE,
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self::T_NOT_NULL + self::T_FLOAT => ValueInfo::T_FLOAT,
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self::T_NOT_NULL + self::T_BINARY => ValueInfo::T_STRING,
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];
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protected $types = [];
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abstract public function runArray(array $values = []): Result;
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abstract protected function bindValue($value, int $type, int $position): bool;
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abstract protected function prepare(string $query): bool;
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abstract protected static function buildEngineException($code, string $msg): array;
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public function run(...$values): Result {
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return $this->runArray($values);
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}
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public function retype(...$bindings): bool {
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return $this->retypeArray($bindings);
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}
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public static function mungeQuery(string $query, array $types, ...$extraData): string {
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return $query;
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}
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public function retypeArray(array $bindings): bool {
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$this->types = [];
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foreach (ValueInfo::flatten($bindings) as $binding) { // recursively flatten any arrays, which may be provided for SET or IN() clauses
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$bindId = self::TYPES[trim(strtolower($binding))] ?? 0;
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assert($bindId, new Exception("paramTypeInvalid", $binding));
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$this->types[] = $bindId;
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}
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$this->prepare(static::mungeQuery($this->query, $this->types));
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return true;
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}
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protected function cast($v, int $t) {
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switch ($t) {
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case self::T_DATETIME:
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return Date::transform($v, "sql");
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case self::T_DATETIME + self::T_NOT_NULL:
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$v = Date::transform($v, "sql");
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return $v ? $v : "0001-01-01 00:00:00";
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default:
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$v = ValueInfo::normalize($v, self::TYPE_NORM_MAP[$t], null, "sql");
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return is_bool($v) ? (int) $v : $v;
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}
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}
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protected function bindValues(array $values): bool {
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// recursively flatten any arrays, which may be provided for SET or IN() clauses
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$values = ValueInfo::flatten($values);
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foreach ($values as $a => $value) {
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if (array_key_exists($a, $this->types)) {
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$value = $this->cast($value, $this->types[$a]);
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$this->bindValue($value, $this->types[$a] % self::T_NOT_NULL, ++$a);
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} else {
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throw new Exception("paramTypeMissing", $a+1);
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}
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}
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// once all values are bound, check that all parameters have been supplied values and bind null for any missing ones
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// SQLite will happily substitute null for a missing value, but other engines (viz. PostgreSQL) produce an error
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for ($a = sizeof($values); $a < sizeof($this->types); $a++) {
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$this->bindValue(null, $this->types[$a] % self::T_NOT_NULL, $a + 1);
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}
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return true;
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}
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}
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