PHPLIB-477: Deprecate CodeWScope for use within the mapReduce command

docs/includes/apiargs-MongoDBCollection-method-mapReduce-option.yaml

@@ -13,6 +13,11 @@ name: finalize
 type: :php:`MongoDB\\BSON\\Javascript <class.mongodb-bson-javascript>`
 description: |
   Follows the reduce method and modifies the output.
+
+  .. note::
+
+     Passing a Javascript instance with a scope is deprecated. Put all scope
+     variables in the ``scope`` option of the MapReduce operation.
 interface: phpmethod
 operation: ~
 optional: true

docs/includes/apiargs-MongoDBCollection-method-mapReduce-param.yaml

@@ -4,6 +4,11 @@ type: :php:`MongoDB\\BSON\\Javascript <mongodb-bson-javascript>`
 description: |
   A JavaScript function that associates or "maps" a value with a key and emits
   the key and value pair.
+
+  .. note::
+
+     Passing a Javascript instance with a scope is deprecated. Put all scope
+     variables in the ``scope`` option of the MapReduce operation.
 interface: phpmethod
 operation: ~
 optional: false
@@ -14,6 +19,11 @@ type: :php:`MongoDB\\BSON\\Javascript <class.mongodb-bson-javascript>`
 description: |
   A JavaScript function that "reduces" to a single object all the values
   associated with a particular key.
+
+  .. note::
+
+     Passing a Javascript instance with a scope is deprecated. Put all scope
+     variables in the ``scope`` option of the MapReduce operation.
 interface: phpmethod
 operation: ~
 optional: false

src/Operation/MapReduce.php

@@ -40,6 +40,8 @@ use function is_string;
 use function MongoDB\create_field_path_type_map;
 use function MongoDB\is_mapreduce_output_inline;
 use function MongoDB\server_supports_feature;
+use function trigger_error;
+use const E_USER_DEPRECATED;
 
 /**
  * Operation for the mapReduce command.
@@ -88,9 +90,15 @@ class MapReduce implements Executable
      *  * map (MongoDB\BSON\Javascript): A JavaScript function that associates
      *    or "maps" a value with a key and emits the key and value pair.
      *
+     *    Passing a Javascript instance with a scope is deprecated. Put all
+     *    scope variables in the "scope" option of the MapReduce operation.
+     *
      *  * reduce (MongoDB\BSON\Javascript): A JavaScript function that "reduces"
      *    to a single object all the values associated with a particular key.
      *
+     *    Passing a Javascript instance with a scope is deprecated. Put all
+     *    scope variables in the "scope" option of the MapReduce operation.
+     *
      *  * out (string|document): Specifies where to output the result of the
      *    map-reduce operation. You can either output to a collection or return
      *    the result inline. On a primary member of a replica set you can output
@@ -114,6 +122,9 @@ class MapReduce implements Executable
      *  * finalize (MongoDB\BSON\JavascriptInterface): Follows the reduce method
      *    and modifies the output.
      *
+     *    Passing a Javascript instance with a scope is deprecated. Put all
+     *    scope variables in the "scope" option of the MapReduce operation.
+     *
      *  * jsMode (boolean): Specifies whether to convert intermediate data into
      *    BSON format between the execution of the map and reduce functions.
      *
@@ -242,6 +253,19 @@ class MapReduce implements Executable
             unset($options['writeConcern']);
         }
 
+        // Handle deprecation of CodeWScope
+        if ($map->getScope() !== null) {
+            @trigger_error('Use of Javascript with scope in "$map" argument for MapReduce is deprecated. Put all scope variables in the "scope" option of the MapReduce operation.', E_USER_DEPRECATED);
+        }
+
+        if ($reduce->getScope() !== null) {
+            @trigger_error('Use of Javascript with scope in "$reduce" argument for MapReduce is deprecated. Put all scope variables in the "scope" option of the MapReduce operation.', E_USER_DEPRECATED);
+        }
+
+        if (isset($options['finalize']) && $options['finalize']->getScope() !== null) {
+            @trigger_error('Use of Javascript with scope in "finalize" option for MapReduce is deprecated. Put all scope variables in the "scope" option of the MapReduce operation.', E_USER_DEPRECATED);
+        }
+
         $this->databaseName = (string) $databaseName;
         $this->collectionName = (string) $collectionName;
         $this->map = $map;