chore: make order in the sorted set functions more explicit (#235)

change the order argument in the sorted set functions to explicitly take
SORT_ASC and SORT_DESC, and treat other values as ascending. This
replaces the previous logic where SORT_DESC or lower was descending, and
SORT_ASC or higher was ascending. Using built-in constants in a
comparison was confusing.

src/Cache/CacheClient.php

@@ -1900,7 +1900,8 @@ public function sortedSetIncrementScore(string $cacheName, string $sortedSetName
      * This rank is exclusive, i.e. the element at this rank will not be fetched.
      * Defaults to null, which fetches up until and including the last element.
      * @param ?int $order The order to fetch the elements in. Defaults to Ascending.
-     * Will be treated as ascending if SORT_ASC or higher is supplied, and descending if SORT_DESC or lower is supplied.
+     * Use SORT_ASC for ascending order, or SORT_DESC for descending order.
+     * Any other values will be treated as ascending
      * @return ResponseFuture<SortedSetFetchResponse> A waitable future which will
      * provide the result of the sorted set fetch operation upon a blocking call to wait:<br />
      * <code>$response = $responseFuture->wait();</code><br />
@@ -1938,7 +1939,8 @@ public function sortedSetFetchByRankAsync(string $cacheName, string $sortedSetNa
      * This rank is exclusive, i.e. the element at this rank will not be fetched.
      * Defaults to null, which fetches up until and including the last element.
      * @param ?int $order The order to fetch the elements in. Defaults to Ascending.
-     * Will be treated as ascending if SORT_ASC or higher is supplied, and descending if SORT_DESC or lower is supplied.
+     * Use SORT_ASC for ascending order, or SORT_DESC for descending order.
+     * Any other values will be treated as ascending
      * @return SortedSetFetchResponse Represents the result of the sorted set fetch operation.
      * This result is resolved to a type-safe object of one of the following types:<br>
      * * SortedSetFetchHit<br>
@@ -1968,7 +1970,8 @@ public function sortedSetFetchByRank(string $cacheName, string $sortedSetName, ?
      * @param ?float $maxScore The maximum score (inclusive) of the
      * elements to fetch. Defaults to positive infinity.
      * @param ?int $order The order to fetch the elements in. Defaults to Ascending.
-     *  Will be treated as ascending if SORT_ASC or higher is supplied, and descending if SORT_DESC or lower is supplied.
+     * Use SORT_ASC for ascending order, or SORT_DESC for descending order.
+     * Any other values will be treated as ascending
      * @param ?int $offset The number of elements to skip before
      * returning the first element. Defaults to 0. Note: this is not the rank of
      * the first element to return, but the number of elements of the result set
@@ -2011,7 +2014,8 @@ public function sortedSetFetchByScoreAsync(string $cacheName, string $sortedSetN
      * @param ?float $maxScore The maximum score (inclusive) of the
      * elements to fetch. Defaults to positive infinity.
      * @param ?int $order The order to fetch the elements in. Defaults to Ascending.
-     * Will be treated as ascending if SORT_ASC or higher is supplied, and descending if SORT_DESC or lower is supplied.
+     * Use SORT_ASC for ascending order, or SORT_DESC for descending order.
+     * Any other values will be treated as ascending
      * @param ?int $offset The number of elements to skip before
      * returning the first element. Defaults to 0. Note: this is not the rank of
      * the first element to return, but the number of elements of the result set

src/Cache/Internal/ScsDataClient.php

@@ -1772,10 +1772,10 @@ public function sortedSetFetchByRank(string $cacheName, string $sortedSetName, ?
             }
             $sortedSetFetchRequest->setByIndex($byIndex);
 
-            if (is_null($order) || $order >= SORT_ASC) {
-                $sortedSetFetchRequest->setOrder(_SortedSetFetchRequest\Order::ASCENDING);
-            } else {
+            if ($order == SORT_DESC) {
                 $sortedSetFetchRequest->setOrder(_SortedSetFetchRequest\Order::DESCENDING);
+            } else {
+                $sortedSetFetchRequest->setOrder(_SortedSetFetchRequest\Order::ASCENDING);
             }
 
             $call = $this->grpcManager->client->SortedSetFetch(