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Introduce abstract class for result sets

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Most of the SQLite3 Result class' methods are fully generic, so it should be helpful for future result sets
This commit is contained in:
J. King 2017-11-05 22:28:19 -05:00
parent 9304f99032
commit f51152980c
2 changed files with 57 additions and 38 deletions
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55
lib/Db/AbstractResult.php Normal file
View file

@ -0,0 +1,55 @@
<?php
declare(strict_types=1);
namespace JKingWeb\Arsse\Db;
abstract class AbstractResult implements Result {
protected $pos = 0;
protected $cur = null;
// actual public methods
public function getValue() {
$this->next();
if ($this->valid()) {
$keys = array_keys($this->cur);
return $this->cur[array_shift($keys)];
}
return null;
}
public function getRow() {
$this->next();
return ($this->valid() ? $this->cur : null);
}
public function getAll(): array {
return iterator_to_array($this, false);
}
abstract public function changes();
abstract public function lastId();
// PHP iterator methods
abstract public function valid();
public function next() {
$this->cur = null;
$this->pos += 1;
}
public function current() {
return $this->cur;
}
public function key() {
return $this->pos;
}
public function rewind() {
if ($this->pos) {
throw new Exception("resultReused");
}
}
}

40
lib/Db/SQLite3/Result.php
View file

@ -1,9 +1,10 @@
<?php
declare(strict_types=1);
namespace JKingWeb\Arsse\Db\SQLite3;
use JKingWeb\Arsse\Db\Exception;
class Result implements \JKingWeb\Arsse\Db\Result {
class Result extends \JKingWeb\Arsse\Db\AbstractResult {
protected $st;
protected $set;
protected $pos = 0;
@ -13,24 +14,6 @@ class Result implements \JKingWeb\Arsse\Db\Result {
// actual public methods
public function getValue() {
$this->next();
if ($this->valid()) {
$keys = array_keys($this->cur);
return $this->cur[array_shift($keys)];
}
return null;
}
public function getRow() {
$this->next();
return ($this->valid() ? $this->cur : null);
}
public function getAll(): array {
return iterator_to_array($this, false);
}
public function changes() {
return $this->rows;
}
@ -62,23 +45,4 @@ class Result implements \JKingWeb\Arsse\Db\Result {
$this->cur = $this->set->fetchArray(\SQLITE3_ASSOC);
return ($this->cur !== false);
}
public function next() {
$this->cur = null;
$this->pos += 1;
}
public function current() {
return $this->cur;
}
public function key() {
return $this->pos;
}
public function rewind() {
if ($this->pos) {
throw new Exception("resultReused");
}
}
}