enhancement: add stringarray and operationContextParam support

.changes/nextrelease/endpointv2-updates.json

@@ -0,0 +1,7 @@
+[
+  {
+    "type": "enhancement",
+    "category": "EndpointV2",
+    "description": "Adds support for `StringArray` endpoint parameters and `operationContextParams`"
+  }
+]

src/Api/Operation.php

@@ -11,6 +11,7 @@ class Operation extends AbstractModel
     private $errors;
     private $staticContextParams = [];
     private $contextParams;
+    private $operationContextParams = [];
 
     public function __construct(array $definition, ShapeMap $shapeMap)
     {
@@ -28,6 +29,10 @@ public function __construct(array $definition, ShapeMap $shapeMap)
             $this->staticContextParams = $definition['staticContextParams'];
         }
 
+        if (isset($definition['operationContextParams'])) {
+            $this->operationContextParams = $definition['operationContextParams'];
+        }
+
         parent::__construct($definition, $shapeMap);
         $this->contextParams = $this->setContextParams();
     }
@@ -124,6 +129,17 @@ public function getContextParams()
         return $this->contextParams;
     }
 
+    /**
+     * Gets definition of modeled dynamic values used
+     * for endpoint resolution
+     *
+     * @return array
+     */
+    public function getOperationContextParams(): array
+    {
+        return $this->operationContextParams;
+    }
+
     private function setContextParams()
     {
         $members = $this->getInput()->getMembers();

src/ClientSideMonitoring/ApiCallMonitoringMiddleware.php

@@ -13,7 +13,6 @@
  */
 class ApiCallMonitoringMiddleware extends AbstractMonitoringMiddleware
 {
-
     /**
      * Api Call Attempt event keys for each Api Call event key
      *

src/EndpointV2/EndpointV2Middleware.php

@@ -7,6 +7,7 @@
 use Aws\CommandInterface;
 use Closure;
 use GuzzleHttp\Promise\Promise;
+use function JmesPath\search;
 
 /**
  * Handles endpoint rule evaluation and endpoint resolution.
@@ -137,9 +138,14 @@ private function resolveArgs(array $commandArgs, Operation $operation): array
         $contextParams = $this->bindContextParams(
             $commandArgs, $operation->getContextParams()
         );
+        $operationContextParams = $this->bindOperationContextParams(
+            array_merge($contextParams, $staticContextParams, $commandArgs),
+            $operation->getOperationContextParams()
+        );
 
         return array_merge(
             $this->clientArgs,
+            $operationContextParams,
             $contextParams,
             $staticContextParams,
             $endpointCommandArgs
@@ -231,6 +237,35 @@ private function bindContextParams(
         return $scopedParams;
     }
 
+    /**
+     * Binds context params to their corresponding values found in
+     * command arguments.
+     *
+     * @param array $commandArgs
+     * @param array $contextParams
+     *
+     * @return array
+     */
+    private function bindOperationContextParams(
+        array $commandArgs,
+        array $operationContextParams
+    ): array
+    {
+        $scopedParams = [];
+
+        foreach($operationContextParams as $name => $spec) {
+//            if (isset($commandArgs[$name])) {
+                $scopedValue = search($spec['path'], $commandArgs);
+
+                if ($scopedValue) {
+                    $scopedParams[$name] = $scopedValue;
+                }
+//            }//
+        }
+
+        return $scopedParams;
+    }
+
     /**
      * Applies resolved auth schemes to the command object.
      *

src/EndpointV2/Ruleset/RulesetParameter.php

@@ -3,6 +3,7 @@
 namespace Aws\EndpointV2\Ruleset;
 
 use Aws\Exception\UnresolvedEndpointException;
+use function \Aws\is_associative;
 
 /**
  * Houses properties of an individual parameter definition.
@@ -30,6 +31,13 @@ class RulesetParameter
     /** @var boolean */
     private $deprecated;
 
+    /** @var array<string, string> */
+    private static $typeMap = [
+        'String' => 'is_string',
+        'Boolean' => 'is_bool',
+        'StringArray' => 'isStringArray'
+    ];
+
     public function __construct($name, array $definition)
     {
         $type = ucfirst($definition['type']);
@@ -38,18 +46,16 @@ public function __construct($name, array $definition)
         } else {
             throw new UnresolvedEndpointException(
                 'Unknown parameter type ' . "`{$type}`" .
-                '. Parameters must be of type `String` or `Boolean`.'
+                '. Parameters must be of type `String`, `Boolean` or `StringArray.'
             );
         }
+
         $this->name = $name;
-        $this->builtIn = isset($definition['builtIn']) ? $definition['builtIn'] : null;
-        $this->default = isset($definition['default']) ? $definition['default'] : null;
-        $this->required =  isset($definition['required']) ?
-            $definition['required'] : false;
-        $this->documentation =  isset($definition['documentation']) ?
-            $definition['documentation'] : null;
-        $this->deprecated =  isset($definition['deprecated']) ?
-            $definition['deprecated'] : false;
+        $this->builtIn = $definition['builtIn'] ?? null;
+        $this->default = $definition['default'] ?? null;
+        $this->required = $definition['required'] ?? false;
+        $this->documentation = $definition['documentation'] ?? null;
+        $this->deprecated = $definition['deprecated'] ?? false;
     }
 
     /**
@@ -116,12 +122,7 @@ public function getDeprecated()
      */
     public function validateInputParam($inputParam)
     {
-        $typeMap = [
-            'String' => 'is_string',
-            'Boolean' => 'is_bool'
-        ];
-
-        if ($typeMap[$this->type]($inputParam) === false) {
+        if (!$this->isValidInput($inputParam)) {
             throw new UnresolvedEndpointException(
                 "Input parameter `{$this->name}` is the wrong type. Must be a {$this->type}."
             );
@@ -130,19 +131,49 @@ public function validateInputParam($inputParam)
         if ($this->deprecated) {
             $deprecated = $this->deprecated;
             $deprecationString = "{$this->name} has been deprecated ";
-            $msg = isset($deprecated['message']) ? $deprecated['message'] : null;
-            $since = isset($deprecated['since']) ? $deprecated['since'] : null;
+            $msg = $deprecated['message'] ?? null;
+            $since = $deprecated['since'] ?? null;
 
-            if (!is_null($since)) $deprecationString = $deprecationString
-                . 'since '. $since . '. ';
-            if (!is_null($msg)) $deprecationString = $deprecationString . $msg;
+            if (!is_null($since)){
+                $deprecationString .= 'since ' . $since . '. ';
+            }
+            if (!is_null($msg)) {
+                $deprecationString .= $msg;
+            }
 
             trigger_error($deprecationString, E_USER_WARNING);
         }
     }
 
     private function isValidType($type)
     {
-        return in_array($type, ['String', 'Boolean']);
+        return isset(self::$typeMap[$type]);
+    }
+
+    private function isValidInput($inputParam): bool
+    {
+        $method = self::$typeMap[$this->type];
+        if (is_callable($method)) {
+            return $method($inputParam);
+        } elseif (method_exists($this, $method)) {
+            return $this->$method($inputParam);
+        }
+
+        return false;
+    }
+
+    private function isStringArray(array $array): bool
+    {
+        if (is_associative($array)) {
+            return false;
+        }
+
+        foreach($array as $value) {
+            if (!is_string($value)) {
+                return false;
+            }
+        }
+
+        return true;
     }
 }

src/EndpointV2/Ruleset/RulesetStandardLibrary.php

@@ -61,17 +61,23 @@ public function not($value)
      */
     public function getAttr($from, $path)
     {
+        // Handles the case where "[<int|string]" is provided as the top-level path
+        if (preg_match('/^\[(\w+)\]$/', $path, $matches)) {
+            $index = is_numeric($matches[1]) ? (int) $matches[1] : $matches[1];
+
+            return $from[$index] ?? null;
+        }
+
         $parts = explode('.', $path);
         foreach ($parts as $part) {
             $sliceIdx = strpos($part, '[');
             if ($sliceIdx !== false) {
                 if (substr($part, -1) !== ']') {
                     return null;
                 }
-                $slice = intval(substr($part, $sliceIdx + 1, strlen($part) - 1));
-                $from = isset($from[substr($part,0, $sliceIdx)][$slice])
-                    ? $from[substr($part,0, $sliceIdx)][$slice]
-                    : null;
+                $slice = (int) substr($part, $sliceIdx + 1, strlen($part) - 1);
+                $fromIndex = substr($part, 0, $sliceIdx);
+                $from = $from[$fromIndex][$slice] ?? null;
             } else {
                 $from = $from[$part];
             }

src/functions.php

@@ -603,3 +603,23 @@ function strip_fips_pseudo_regions($region)
     return str_replace(['fips-', '-fips'], ['', ''], $region);
 }
 
+/**
+ * Checks if an array is associative
+ *
+ * @param array $array
+ *
+ * @return bool
+ */
+function is_associative(array $array): bool
+{
+    if (empty($array)) {
+        return false;
+    }
+
+    if (function_exists('array_is_list')) {
+        return !array_is_list($array);
+    }
+
+    return array_keys($array) !== range(0, count($array) - 1);
+}
+

tests/Api/OperationTest.php

@@ -131,4 +131,44 @@ public function testGetContextParams()
            $contextParams
         );
     }
+
+    public function testGetOperationContextParams()
+    {
+        $definition = [
+            "input" => ["shape" => "ListOfObjectsOperationRequest"],
+            "operationContextParams" => [
+                "stringArrayParam" => [
+                    "path" => "nested.listOfObjects[*].key"
+                ]
+            ],
+            "http" => [
+                "method" => "POST",
+                "requestUri" => "/"
+            ]
+        ];
+        $operation = new Operation(
+            $definition,
+            new ShapeMap([
+                "ListOfObjectsOperationRequest" => [
+                    "type" => "structure",
+                    "members" => [
+                        "nested" => ["shape" => "Nested"]
+                    ]
+                ],
+                "Nested" => [
+                    "type" => "structure",
+                    "members" => [
+                        "listOfObjects" => ["shape" => "ListOfObjects"]
+                    ]
+                ],
+                "ListOfObjects" => [
+                    "type" => "list",
+                    "member" => ["shape" => "ObjectMember"]
+                ]
+            ])
+        );
+
+        $operationContextParams = $operation->getOperationContextParams();
+        $this->assertSame($definition['operationContextParams'], $operationContextParams);
+    }
 }