Extended core support by implementing SORT_RO command (#1044)

* Added support for SORT_RO command

* Codestyle fixes

* Added command description

---------

Co-authored-by: Vladyslav Vildanov <vladyslavvildanov@Vladyslav-Vildanov-MacBook-Pro.local>

src/ClientContextInterface.php

@@ -14,6 +14,7 @@
 
 use Predis\Command\Argument\Geospatial\ByInterface;
 use Predis\Command\Argument\Geospatial\FromInterface;
+use Predis\Command\Argument\Server\LimitOffsetCount;
 use Predis\Command\Argument\Server\To;
 use Predis\Command\CommandInterface;
 
@@ -39,6 +40,7 @@
  * @method $this renamenx($key, $target)
  * @method $this scan($cursor, array $options = null)
  * @method $this sort($key, array $options = null)
+ * @method $this sort_ro(string $key, ?string $byPattern = null, ?LimitOffsetCount $limit = null, array $getPatterns = [], ?string $sorting = null, bool $alpha = false)
  * @method $this ttl($key)
  * @method $this type($key)
  * @method $this append($key, $value)

src/ClientInterface.php

@@ -14,6 +14,7 @@
 
 use Predis\Command\Argument\Geospatial\ByInterface;
 use Predis\Command\Argument\Geospatial\FromInterface;
+use Predis\Command\Argument\Server\LimitOffsetCount;
 use Predis\Command\Argument\Server\To;
 use Predis\Command\CommandInterface;
 use Predis\Command\FactoryInterface;
@@ -48,6 +49,7 @@
  * @method int               renamenx(string $key, string $target)
  * @method array             scan($cursor, array $options = null)
  * @method array             sort(string $key, array $options = null)
+ * @method array             sort_ro(string $key, ?string $byPattern = null, ?LimitOffsetCount $limit = null, array $getPatterns = [], ?string $sorting = null, bool $alpha = false)
  * @method int               ttl(string $key)
  * @method mixed             type(string $key)
  * @method int               append(string $key, $value)

src/Command/Argument/Server/LimitInterface.php

@@ -0,0 +1,19 @@
+<?php
+
+/*
+ * This file is part of the Predis package.
+ *
+ * (c) 2009-2020 Daniele Alessandri
+ * (c) 2021-2023 Till Krüss
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Predis\Command\Argument\Server;
+
+use Predis\Command\Argument\ArrayableArgument;
+
+interface LimitInterface extends ArrayableArgument
+{
+}

src/Command/Argument/Server/LimitOffsetCount.php

@@ -0,0 +1,42 @@
+<?php
+
+/*
+ * This file is part of the Predis package.
+ *
+ * (c) 2009-2020 Daniele Alessandri
+ * (c) 2021-2023 Till Krüss
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Predis\Command\Argument\Server;
+
+class LimitOffsetCount implements LimitInterface
+{
+    private const KEYWORD = 'LIMIT';
+
+    /**
+     * @var int
+     */
+    private $offset;
+
+    /**
+     * @var int
+     */
+    private $count;
+
+    public function __construct(int $offset, int $count)
+    {
+        $this->offset = $offset;
+        $this->count = $count;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function toArray(): array
+    {
+        return [self::KEYWORD, $this->offset, $this->count];
+    }
+}

src/Command/Command.php

@@ -120,7 +120,7 @@ public static function normalizeVariadic(array $arguments)
     public function filterArguments(): void
     {
         $this->arguments = array_filter($this->arguments, static function ($argument) {
-            return $argument !== false;
+            return $argument !== false && $argument !== null;
         });
     }
 }

src/Command/Redis/SINTERCARD.php

@@ -14,7 +14,7 @@
 
 use Predis\Command\Command as RedisCommand;
 use Predis\Command\Traits\Keys;
-use Predis\Command\Traits\Limit;
+use Predis\Command\Traits\Limit\Limit;
 
 class SINTERCARD extends RedisCommand
 {

src/Command/Redis/SORT_RO.php

@@ -0,0 +1,74 @@
+<?php
+
+/*
+ * This file is part of the Predis package.
+ *
+ * (c) 2009-2020 Daniele Alessandri
+ * (c) 2021-2023 Till Krüss
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Predis\Command\Redis;
+
+use Predis\Command\Command as RedisCommand;
+use Predis\Command\Traits\By\ByArgument;
+use Predis\Command\Traits\Get\Get;
+use Predis\Command\Traits\Limit\LimitObject;
+use Predis\Command\Traits\Sorting;
+
+/**
+ * @see https://redis.io/commands/sort_ro/
+ *
+ * Read-only variant of the SORT command.
+ * It is exactly like the original SORT but refuses the STORE option
+ * and can safely be used in read-only replicas.
+ */
+class SORT_RO extends RedisCommand
+{
+    use ByArgument {
+        ByArgument::setArguments as setBy;
+    }
+    use LimitObject {
+        LimitObject::setArguments as setLimit;
+    }
+    use Get {
+        Get::setArguments as setGetArgument;
+    }
+    use Sorting {
+        Sorting::setArguments as setSorting;
+    }
+
+    protected static $byArgumentPositionOffset = 1;
+    protected static $getArgumentPositionOffset = 3;
+    protected static $sortArgumentPositionOffset = 4;
+
+    public function getId()
+    {
+        return 'SORT_RO';
+    }
+
+    public function setArguments(array $arguments)
+    {
+        $alpha = array_pop($arguments);
+
+        if (is_bool($alpha) && $alpha) {
+            $arguments[] = 'ALPHA';
+        } elseif (!is_bool($alpha)) {
+            $arguments[] = $alpha;
+        }
+
+        $this->setSorting($arguments);
+        $arguments = $this->getArguments();
+
+        $this->setGetArgument($arguments);
+        $arguments = $this->getArguments();
+
+        $this->setLimit($arguments);
+        $arguments = $this->getArguments();
+
+        $this->setBy($arguments);
+        $this->filterArguments();
+    }
+}

src/Command/Redis/ZINTERCARD.php

@@ -14,7 +14,7 @@
 
 use Predis\Command\Command as RedisCommand;
 use Predis\Command\Traits\Keys;
-use Predis\Command\Traits\Limit;
+use Predis\Command\Traits\Limit\Limit;
 
 /**
  * @see https://redis.io/commands/zintercard/

src/Command/Redis/ZRANGESTORE.php

@@ -14,7 +14,7 @@
 
 use Predis\Command\Command as RedisCommand;
 use Predis\Command\Traits\By\ByLexByScore;
-use Predis\Command\Traits\Limit;
+use Predis\Command\Traits\Limit\Limit;
 use Predis\Command\Traits\Rev;
 
 /**

src/Command/Traits/By/ByArgument.php

@@ -0,0 +1,40 @@
+<?php
+
+/*
+ * This file is part of the Predis package.
+ *
+ * (c) 2009-2020 Daniele Alessandri
+ * (c) 2021-2023 Till Krüss
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Predis\Command\Traits\By;
+
+use Predis\Command\Command;
+
+/**
+ * @mixin Command
+ */
+trait ByArgument
+{
+    private $byModifier = 'BY';
+
+    public function setArguments(array $arguments)
+    {
+        $argumentsLength = count($arguments);
+
+        if (static::$byArgumentPositionOffset >= $argumentsLength || null === $arguments[static::$byArgumentPositionOffset]) {
+            parent::setArguments($arguments);
+
+            return;
+        }
+
+        $argument = $arguments[static::$byArgumentPositionOffset];
+        $argumentsBefore = array_slice($arguments, 0, static::$byArgumentPositionOffset);
+        $argumentsAfter = array_slice($arguments, static::$byArgumentPositionOffset + 1);
+
+        parent::setArguments(array_merge($argumentsBefore, [$this->byModifier, $argument], $argumentsAfter));
+    }
+}

src/Command/Traits/Get/Get.php

@@ -0,0 +1,47 @@
+<?php
+
+/*
+ * This file is part of the Predis package.
+ *
+ * (c) 2009-2020 Daniele Alessandri
+ * (c) 2021-2023 Till Krüss
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Predis\Command\Traits\Get;
+
+use UnexpectedValueException;
+
+trait Get
+{
+    private static $getModifier = 'GET';
+
+    public function setArguments(array $arguments)
+    {
+        $argumentsLength = count($arguments);
+
+        if (static::$getArgumentPositionOffset >= $argumentsLength) {
+            parent::setArguments($arguments);
+
+            return;
+        }
+
+        if (!is_array($arguments[static::$getArgumentPositionOffset])) {
+            throw new UnexpectedValueException('Wrong get argument type');
+        }
+
+        $patterns = [];
+
+        foreach ($arguments[static::$getArgumentPositionOffset] as $pattern) {
+            $patterns[] = self::$getModifier;
+            $patterns[] = $pattern;
+        }
+
+        $argumentsBeforeKeys = array_slice($arguments, 0, static::$getArgumentPositionOffset);
+        $argumentsAfterKeys = array_slice($arguments, static::$getArgumentPositionOffset + 1);
+
+        parent::setArguments(array_merge($argumentsBeforeKeys, $patterns, $argumentsAfterKeys));
+    }
+}

src/Command/Traits/Limit.php → src/Command/Traits/Limit/Limit.php

@@ -10,7 +10,7 @@
  * file that was distributed with this source code.
  */
 
-namespace Predis\Command\Traits;
+namespace Predis\Command\Traits\Limit;
 
 use Predis\Command\Command;
 use UnexpectedValueException;

src/Command/Traits/Limit/LimitObject.php

@@ -0,0 +1,50 @@
+<?php
+
+/*
+ * This file is part of the Predis package.
+ *
+ * (c) 2009-2020 Daniele Alessandri
+ * (c) 2021-2023 Till Krüss
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Predis\Command\Traits\Limit;
+
+use Predis\Command\Argument\Server\LimitInterface;
+
+trait LimitObject
+{
+    public function setArguments(array $arguments)
+    {
+        $argumentPositionOffset = $this->getLimitArgumentPositionOffset($arguments);
+
+        if (null === $argumentPositionOffset) {
+            parent::setArguments($arguments);
+
+            return;
+        }
+
+        $limitObject = $arguments[$argumentPositionOffset];
+        $argumentsBefore = array_slice($arguments, 0, $argumentPositionOffset);
+        $argumentsAfter = array_slice($arguments, $argumentPositionOffset + 1);
+
+        parent::setArguments(array_merge(
+            $argumentsBefore,
+            $limitObject->toArray(),
+            $argumentsAfter
+        ));
+    }
+
+    private function getLimitArgumentPositionOffset(array $arguments): ?int
+    {
+        foreach ($arguments as $i => $value) {
+            if ($value instanceof LimitInterface) {
+                return $i;
+            }
+        }
+
+        return null;
+    }
+}