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<title>[50060] trunk/src/wp-includes/rest-api.php: REST API: Refactor `rest_validate_value_from_schema` into separate validation functions per-type.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/50060">50060</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/50060","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>TimothyBlynJacobs</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2021-01-28 17:59:17 +0000 (Thu, 28 Jan 2021)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>REST API: Refactor `rest_validate_value_from_schema` into separate validation functions per-type.

Props yakimun.
Fixes <a href="https://core.trac.wordpress.org/ticket/52375">#52375</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesrestapiphp">trunk/src/wp-includes/rest-api.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesrestapiphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/rest-api.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/rest-api.php        2021-01-28 17:23:18 UTC (rev 50059)
+++ trunk/src/wp-includes/rest-api.php  2021-01-28 17:59:17 UTC (rev 50060)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2054,329 +2054,437 @@
</span><span class="cx" style="display: block; padding: 0 10px">                );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        if ( 'array' === $args['type'] ) {
-               if ( ! rest_is_array( $value ) ) {
-                       return new WP_Error(
-                               'rest_invalid_type',
-                               /* translators: 1: Parameter, 2: Type name. */
-                               sprintf( __( '%1$s is not of type %2$s.' ), $param, 'array' ),
-                               array( 'param' => $param )
-                       );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ switch ( $args['type'] ) {
+               case 'null':
+                       $is_valid = rest_validate_null_value_from_schema( $value, $param );
+                       break;
+               case 'boolean':
+                       $is_valid = rest_validate_boolean_value_from_schema( $value, $param );
+                       break;
+               case 'object':
+                       $is_valid = rest_validate_object_value_from_schema( $value, $args, $param );
+                       break;
+               case 'array':
+                       $is_valid = rest_validate_array_value_from_schema( $value, $args, $param );
+                       break;
+               case 'number':
+                       $is_valid = rest_validate_number_value_from_schema( $value, $args, $param );
+                       break;
+               case 'string':
+                       $is_valid = rest_validate_string_value_from_schema( $value, $args, $param );
+                       break;
+               case 'integer':
+                       $is_valid = rest_validate_integer_value_from_schema( $value, $args, $param );
+                       break;
+               default:
+                       $is_valid = true;
+                       break;
+       }
+
+       if ( is_wp_error( $is_valid ) ) {
+               return $is_valid;
+       }
+
+       if ( ! empty( $args['enum'] ) ) {
+               $enum_contains_value = rest_validate_enum( $value, $args, $param );
+               if ( is_wp_error( $enum_contains_value ) ) {
+                       return $enum_contains_value;
</ins><span class="cx" style="display: block; padding: 0 10px">                 }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $value = rest_sanitize_array( $value );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ // The "format" keyword should only be applied to strings. However, for backward compatibility,
+       // we allow the "format" keyword if the type keyword was not specified, or was set to an invalid value.
+       if ( isset( $args['format'] )
+               && ( ! isset( $args['type'] ) || 'string' === $args['type'] || ! in_array( $args['type'], $allowed_types, true ) )
+       ) {
+               switch ( $args['format'] ) {
+                       case 'hex-color':
+                               if ( ! rest_parse_hex_color( $value ) ) {
+                                       return new WP_Error( 'rest_invalid_hex_color', __( 'Invalid hex color.' ) );
+                               }
+                               break;
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                if ( isset( $args['items'] ) ) {
-                       foreach ( $value as $index => $v ) {
-                               $is_valid = rest_validate_value_from_schema( $v, $args['items'], $param . '[' . $index . ']' );
-                               if ( is_wp_error( $is_valid ) ) {
-                                       return $is_valid;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 case 'date-time':
+                               if ( ! rest_parse_date( $value ) ) {
+                                       return new WP_Error( 'rest_invalid_date', __( 'Invalid date.' ) );
</ins><span class="cx" style="display: block; padding: 0 10px">                                 }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        }
-               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         break;
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                if ( isset( $args['minItems'] ) && count( $value ) < $args['minItems'] ) {
-                       return new WP_Error(
-                               'rest_too_few_items',
-                               sprintf(
-                                       /* translators: 1: Parameter, 2: Number. */
-                                       _n(
-                                               '%1$s must contain at least %2$s item.',
-                                               '%1$s must contain at least %2$s items.',
-                                               $args['minItems']
-                                       ),
-                                       $param,
-                                       number_format_i18n( $args['minItems'] )
-                               )
-                       );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 case 'email':
+                               if ( ! is_email( $value ) ) {
+                                       return new WP_Error( 'rest_invalid_email', __( 'Invalid email address.' ) );
+                               }
+                               break;
+                       case 'ip':
+                               if ( ! rest_is_ip_address( $value ) ) {
+                                       /* translators: %s: IP address. */
+                                       return new WP_Error( 'rest_invalid_ip', sprintf( __( '%s is not a valid IP address.' ), $param ) );
+                               }
+                               break;
+                       case 'uuid':
+                               if ( ! wp_is_uuid( $value ) ) {
+                                       /* translators: %s: The name of a JSON field expecting a valid UUID. */
+                                       return new WP_Error( 'rest_invalid_uuid', sprintf( __( '%s is not a valid UUID.' ), $param ) );
+                               }
+                               break;
</ins><span class="cx" style="display: block; padding: 0 10px">                 }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                if ( isset( $args['maxItems'] ) && count( $value ) > $args['maxItems'] ) {
-                       return new WP_Error(
-                               'test_too_many_items',
-                               sprintf(
-                                       /* translators: 1: Parameter, 2: Number. */
-                                       _n(
-                                               '%1$s must contain at most %2$s item.',
-                                               '%1$s must contain at most %2$s items.',
-                                               $args['maxItems']
-                                       ),
-                                       $param,
-                                       number_format_i18n( $args['maxItems'] )
-                               )
-                       );
-               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ return true;
+}
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                if ( ! empty( $args['uniqueItems'] ) && ! rest_validate_array_contains_unique_items( $value ) ) {
-                       /* translators: 1: Parameter. */
-                       return new WP_Error( 'rest_duplicate_items', sprintf( __( '%1$s has duplicate items.' ), $param ) );
-               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+/**
+ * Validates a null value based on a schema.
+ *
+ * @since 5.7.0
+ *
+ * @param mixed  $value The value to validate.
+ * @param string $param The parameter name, used in error messages.
+ * @return true|WP_Error
+ */
+function rest_validate_null_value_from_schema( $value, $param ) {
+       if ( null !== $value ) {
+               return new WP_Error(
+                       'rest_invalid_type',
+                       /* translators: 1: Parameter, 2: Type name. */
+                       sprintf( __( '%1$s is not of type %2$s.' ), $param, 'null' ),
+                       array( 'param' => $param )
+               );
</ins><span class="cx" style="display: block; padding: 0 10px">         }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        if ( 'object' === $args['type'] ) {
-               if ( ! rest_is_object( $value ) ) {
-                       return new WP_Error(
-                               'rest_invalid_type',
-                               /* translators: 1: Parameter, 2: Type name. */
-                               sprintf( __( '%1$s is not of type %2$s.' ), $param, 'object' ),
-                               array( 'param' => $param )
-                       );
-               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ return true;
+}
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $value = rest_sanitize_object( $value );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+/**
+ * Validates a boolean value based on a schema.
+ *
+ * @since 5.7.0
+ *
+ * @param mixed  $value The value to validate.
+ * @param string $param The parameter name, used in error messages.
+ * @return true|WP_Error
+ */
+function rest_validate_boolean_value_from_schema( $value, $param ) {
+       if ( ! rest_is_boolean( $value ) ) {
+               return new WP_Error(
+                       'rest_invalid_type',
+                       /* translators: 1: Parameter, 2: Type name. */
+                       sprintf( __( '%1$s is not of type %2$s.' ), $param, 'boolean' ),
+                       array( 'param' => $param )
+               );
+       }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                if ( isset( $args['required'] ) && is_array( $args['required'] ) ) { // schema version 4
-                       foreach ( $args['required'] as $name ) {
-                               if ( ! array_key_exists( $name, $value ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ return true;
+}
+
+/**
+ * Validates an object value based on a schema.
+ *
+ * @since 5.7.0
+ *
+ * @param mixed  $value The value to validate.
+ * @param array  $args  Schema array to use for validation.
+ * @param string $param The parameter name, used in error messages.
+ * @return true|WP_Error
+ */
+function rest_validate_object_value_from_schema( $value, $args, $param ) {
+       if ( ! rest_is_object( $value ) ) {
+               return new WP_Error(
+                       'rest_invalid_type',
+                       /* translators: 1: Parameter, 2: Type name. */
+                       sprintf( __( '%1$s is not of type %2$s.' ), $param, 'object' ),
+                       array( 'param' => $param )
+               );
+       }
+
+       $value = rest_sanitize_object( $value );
+
+       if ( isset( $args['required'] ) && is_array( $args['required'] ) ) { // schema version 4
+               foreach ( $args['required'] as $name ) {
+                       if ( ! array_key_exists( $name, $value ) ) {
+                               return new WP_Error(
+                                       'rest_property_required',
</ins><span class="cx" style="display: block; padding: 0 10px">                                         /* translators: 1: Property of an object, 2: Parameter. */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        return new WP_Error( 'rest_property_required', sprintf( __( '%1$s is a required property of %2$s.' ), $name, $param ) );
-                               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 sprintf( __( '%1$s is a required property of %2$s.' ), $name, $param )
+                               );
</ins><span class="cx" style="display: block; padding: 0 10px">                         }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                } elseif ( isset( $args['properties'] ) ) { // schema version 3
-                       foreach ( $args['properties'] as $name => $property ) {
-                               if ( isset( $property['required'] ) && true === $property['required'] && ! array_key_exists( $name, $value ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         }
+       } elseif ( isset( $args['properties'] ) ) { // schema version 3
+               foreach ( $args['properties'] as $name => $property ) {
+                       if ( isset( $property['required'] ) && true === $property['required'] && ! array_key_exists( $name, $value ) ) {
+                               return new WP_Error(
+                                       'rest_property_required',
</ins><span class="cx" style="display: block; padding: 0 10px">                                         /* translators: 1: Property of an object, 2: Parameter. */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        return new WP_Error( 'rest_property_required', sprintf( __( '%1$s is a required property of %2$s.' ), $name, $param ) );
-                               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 sprintf( __( '%1$s is a required property of %2$s.' ), $name, $param )
+                               );
</ins><span class="cx" style="display: block; padding: 0 10px">                         }
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                foreach ( $value as $property => $v ) {
-                       if ( isset( $args['properties'][ $property ] ) ) {
-                               $is_valid = rest_validate_value_from_schema( $v, $args['properties'][ $property ], $param . '[' . $property . ']' );
-                               if ( is_wp_error( $is_valid ) ) {
-                                       return $is_valid;
-                               }
-                               continue;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ foreach ( $value as $property => $v ) {
+               if ( isset( $args['properties'][ $property ] ) ) {
+                       $is_valid = rest_validate_value_from_schema( $v, $args['properties'][ $property ], $param . '[' . $property . ']' );
+                       if ( is_wp_error( $is_valid ) ) {
+                               return $is_valid;
</ins><span class="cx" style="display: block; padding: 0 10px">                         }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        continue;
+               }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $pattern_property_schema = rest_find_matching_pattern_property_schema( $property, $args );
-                       if ( null !== $pattern_property_schema ) {
-                               $is_valid = rest_validate_value_from_schema( $v, $pattern_property_schema, $param . '[' . $property . ']' );
-                               if ( is_wp_error( $is_valid ) ) {
-                                       return $is_valid;
-                               }
-                               continue;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $pattern_property_schema = rest_find_matching_pattern_property_schema( $property, $args );
+               if ( null !== $pattern_property_schema ) {
+                       $is_valid = rest_validate_value_from_schema( $v, $pattern_property_schema, $param . '[' . $property . ']' );
+                       if ( is_wp_error( $is_valid ) ) {
+                               return $is_valid;
</ins><span class="cx" style="display: block; padding: 0 10px">                         }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        continue;
+               }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        if ( isset( $args['additionalProperties'] ) ) {
-                               if ( false === $args['additionalProperties'] ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         if ( isset( $args['additionalProperties'] ) ) {
+                       if ( false === $args['additionalProperties'] ) {
+                               return new WP_Error(
+                                       'rest_additional_properties_forbidden',
</ins><span class="cx" style="display: block; padding: 0 10px">                                         /* translators: %s: Property of an object. */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        return new WP_Error( 'rest_additional_properties_forbidden', sprintf( __( '%1$s is not a valid property of Object.' ), $property ) );
-                               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 sprintf( __( '%1$s is not a valid property of Object.' ), $property )
+                               );
+                       }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                if ( is_array( $args['additionalProperties'] ) ) {
-                                       $is_valid = rest_validate_value_from_schema( $v, $args['additionalProperties'], $param . '[' . $property . ']' );
-                                       if ( is_wp_error( $is_valid ) ) {
-                                               return $is_valid;
-                                       }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 if ( is_array( $args['additionalProperties'] ) ) {
+                               $is_valid = rest_validate_value_from_schema( $v, $args['additionalProperties'], $param . '[' . $property . ']' );
+                               if ( is_wp_error( $is_valid ) ) {
+                                       return $is_valid;
</ins><span class="cx" style="display: block; padding: 0 10px">                                 }
</span><span class="cx" style="display: block; padding: 0 10px">                        }
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                if ( isset( $args['minProperties'] ) && count( $value ) < $args['minProperties'] ) {
-                       return new WP_Error(
-                               'rest_too_few_properties',
-                               sprintf(
-                                       /* translators: 1: Parameter, 2: Number. */
-                                       _n(
-                                               '%1$s must contain at least %2$s property.',
-                                               '%1$s must contain at least %2$s properties.',
-                                               $args['minProperties']
-                                       ),
-                                       $param,
-                                       number_format_i18n( $args['minProperties'] )
-                               )
-                       );
-               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( isset( $args['minProperties'] ) && count( $value ) < $args['minProperties'] ) {
+               return new WP_Error(
+                       'rest_too_few_properties',
+                       /* translators: 1: Parameter, 2: Number. */
+                       sprintf(
+                               _n(
+                                       '%1$s must contain at least %2$s property.',
+                                       '%1$s must contain at least %2$s properties.',
+                                       $args['minProperties']
+                               ),
+                               $param,
+                               number_format_i18n( $args['minProperties'] )
+                       )
+               );
+       }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                if ( isset( $args['maxProperties'] ) && count( $value ) > $args['maxProperties'] ) {
-                       return new WP_Error(
-                               'rest_too_many_properties',
-                               sprintf(
-                                       /* translators: 1: Parameter, 2: Number. */
-                                       _n(
-                                               '%1$s must contain at most %2$s property.',
-                                               '%1$s must contain at most %2$s properties.',
-                                               $args['maxProperties']
-                                       ),
-                                       $param,
-                                       number_format_i18n( $args['maxProperties'] )
-                               )
-                       );
-               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( isset( $args['maxProperties'] ) && count( $value ) > $args['maxProperties'] ) {
+               return new WP_Error(
+                       'rest_too_many_properties',
+                       /* translators: 1: Parameter, 2: Number. */
+                       sprintf(
+                               _n(
+                                       '%1$s must contain at most %2$s property.',
+                                       '%1$s must contain at most %2$s properties.',
+                                       $args['maxProperties']
+                               ),
+                               $param,
+                               number_format_i18n( $args['maxProperties'] )
+                       )
+               );
</ins><span class="cx" style="display: block; padding: 0 10px">         }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        if ( 'null' === $args['type'] ) {
-               if ( null !== $value ) {
-                       return new WP_Error(
-                               'rest_invalid_type',
-                               /* translators: 1: Parameter, 2: Type name. */
-                               sprintf( __( '%1$s is not of type %2$s.' ), $param, 'null' ),
-                               array( 'param' => $param )
-                       );
-               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ return true;
+}
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                return true;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+/**
+ * Validates an array value based on a schema.
+ *
+ * @since 5.7.0
+ *
+ * @param mixed  $value The value to validate.
+ * @param array  $args  Schema array to use for validation.
+ * @param string $param The parameter name, used in error messages.
+ * @return true|WP_Error
+ */
+function rest_validate_array_value_from_schema( $value, $args, $param ) {
+       if ( ! rest_is_array( $value ) ) {
+               return new WP_Error(
+                       'rest_invalid_type',
+                       /* translators: 1: Parameter, 2: Type name. */
+                       sprintf( __( '%1$s is not of type %2$s.' ), $param, 'array' ),
+                       array( 'param' => $param )
+               );
</ins><span class="cx" style="display: block; padding: 0 10px">         }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        if ( in_array( $args['type'], array( 'integer', 'number' ), true ) ) {
-               if ( ! is_numeric( $value ) ) {
-                       return new WP_Error(
-                               'rest_invalid_type',
-                               /* translators: 1: Parameter, 2: Type name. */
-                               sprintf( __( '%1$s is not of type %2$s.' ), $param, $args['type'] ),
-                               array( 'param' => $param )
-                       );
-               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $value = rest_sanitize_array( $value );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                if ( isset( $args['multipleOf'] ) && fmod( $value, $args['multipleOf'] ) !== 0.0 ) {
-                       /* translators: 1: Parameter, 2: Multiplier. */
-                       return new WP_Error( 'rest_invalid_multiple', sprintf( __( '%1$s must be a multiple of %2$s.' ), $param, $args['multipleOf'] ) );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( isset( $args['items'] ) ) {
+               foreach ( $value as $index => $v ) {
+                       $is_valid = rest_validate_value_from_schema( $v, $args['items'], $param . '[' . $index . ']' );
+                       if ( is_wp_error( $is_valid ) ) {
+                               return $is_valid;
+                       }
</ins><span class="cx" style="display: block; padding: 0 10px">                 }
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        if ( 'integer' === $args['type'] && ! rest_is_integer( $value ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( isset( $args['minItems'] ) && count( $value ) < $args['minItems'] ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                 return new WP_Error(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        'rest_invalid_type',
-                       /* translators: 1: Parameter, 2: Type name. */
-                       sprintf( __( '%1$s is not of type %2$s.' ), $param, 'integer' ),
-                       array( 'param' => $param )
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 'rest_too_few_items',
+                       /* translators: 1: Parameter, 2: Number. */
+                       sprintf(
+                               _n(
+                                       '%1$s must contain at least %2$s item.',
+                                       '%1$s must contain at least %2$s items.',
+                                       $args['minItems']
+                               ),
+                               $param,
+                               number_format_i18n( $args['minItems'] )
+                       )
</ins><span class="cx" style="display: block; padding: 0 10px">                 );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        if ( 'boolean' === $args['type'] && ! rest_is_boolean( $value ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( isset( $args['maxItems'] ) && count( $value ) > $args['maxItems'] ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                 return new WP_Error(
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        'test_too_many_items',
+                       /* translators: 1: Parameter, 2: Number. */
+                       sprintf(
+                               _n(
+                                       '%1$s must contain at most %2$s item.',
+                                       '%1$s must contain at most %2$s items.',
+                                       $args['maxItems']
+                               ),
+                               $param,
+                               number_format_i18n( $args['maxItems'] )
+                       )
+               );
+       }
+
+       if ( ! empty( $args['uniqueItems'] ) && ! rest_validate_array_contains_unique_items( $value ) ) {
+               /* translators: 1: Parameter. */
+               return new WP_Error( 'rest_duplicate_items', sprintf( __( '%1$s has duplicate items.' ), $param ) );
+       }
+
+       return true;
+}
+
+/**
+ * Validates a number value based on a schema.
+ *
+ * @since 5.7.0
+ *
+ * @param mixed  $value The value to validate.
+ * @param array  $args  Schema array to use for validation.
+ * @param string $param The parameter name, used in error messages.
+ * @return true|WP_Error
+ */
+function rest_validate_number_value_from_schema( $value, $args, $param ) {
+       if ( ! is_numeric( $value ) ) {
+               return new WP_Error(
</ins><span class="cx" style="display: block; padding: 0 10px">                         'rest_invalid_type',
</span><span class="cx" style="display: block; padding: 0 10px">                        /* translators: 1: Parameter, 2: Type name. */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        sprintf( __( '%1$s is not of type %2$s.' ), $param, 'boolean' ),
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 sprintf( __( '%1$s is not of type %2$s.' ), $param, $args['type'] ),
</ins><span class="cx" style="display: block; padding: 0 10px">                         array( 'param' => $param )
</span><span class="cx" style="display: block; padding: 0 10px">                );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        if ( 'string' === $args['type'] ) {
-               if ( ! is_string( $value ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( isset( $args['multipleOf'] ) && fmod( $value, $args['multipleOf'] ) !== 0.0 ) {
+               return new WP_Error(
+                       'rest_invalid_multiple',
+                       /* translators: 1: Parameter, 2: Multiplier. */
+                       sprintf( __( '%1$s must be a multiple of %2$s.' ), $param, $args['multipleOf'] )
+               );
+       }
+
+       if ( isset( $args['minimum'] ) && ! isset( $args['maximum'] ) ) {
+               if ( ! empty( $args['exclusiveMinimum'] ) && $value <= $args['minimum'] ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                         return new WP_Error(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                'rest_invalid_type',
-                               /* translators: 1: Parameter, 2: Type name. */
-                               sprintf( __( '%1$s is not of type %2$s.' ), $param, 'string' ),
-                               array( 'param' => $param )
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         'rest_out_of_bounds',
+                               /* translators: 1: Parameter, 2: Minimum number. */
+                               sprintf( __( '%1$s must be greater than %2$d' ), $param, $args['minimum'] )
</ins><span class="cx" style="display: block; padding: 0 10px">                         );
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                if ( isset( $args['minLength'] ) && mb_strlen( $value ) < $args['minLength'] ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         if ( empty( $args['exclusiveMinimum'] ) && $value < $args['minimum'] ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                         return new WP_Error(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                'rest_too_short',
-                               sprintf(
-                                       /* translators: 1: Parameter, 2: Number of characters. */
-                                       _n( '%1$s must be at least %2$s character long.', '%1$s must be at least %2$s characters long.', $args['minLength'] ),
-                                       $param,
-                                       number_format_i18n( $args['minLength'] )
-                               )
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         'rest_out_of_bounds',
+                               /* translators: 1: Parameter, 2: Minimum number. */
+                               sprintf( __( '%1$s must be greater than or equal to %2$d' ), $param, $args['minimum'] )
</ins><span class="cx" style="display: block; padding: 0 10px">                         );
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                if ( isset( $args['maxLength'] ) && mb_strlen( $value ) > $args['maxLength'] ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( isset( $args['maximum'] ) && ! isset( $args['minimum'] ) ) {
+               if ( ! empty( $args['exclusiveMaximum'] ) && $value >= $args['maximum'] ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                         return new WP_Error(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                'rest_too_long',
-                               sprintf(
-                                       /* translators: 1: Parameter, 2: Number of characters. */
-                                       _n( '%1$s must be at most %2$s character long.', '%1$s must be at most %2$s characters long.', $args['maxLength'] ),
-                                       $param,
-                                       number_format_i18n( $args['maxLength'] )
-                               )
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         'rest_out_of_bounds',
+                               /* translators: 1: Parameter, 2: Maximum number. */
+                               sprintf( __( '%1$s must be less than %2$d' ), $param, $args['maximum'] )
</ins><span class="cx" style="display: block; padding: 0 10px">                         );
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                if ( isset( $args['pattern'] ) && ! rest_validate_json_schema_pattern( $args['pattern'], $value ) ) {
-                       /* translators: 1: Parameter, 2: Pattern. */
-                       return new WP_Error( 'rest_invalid_pattern', sprintf( __( '%1$s does not match pattern %2$s.' ), $param, $args['pattern'] ) );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         if ( empty( $args['exclusiveMaximum'] ) && $value > $args['maximum'] ) {
+                       return new WP_Error(
+                               'rest_out_of_bounds',
+                               /* translators: 1: Parameter, 2: Maximum number. */
+                               sprintf( __( '%1$s must be less than or equal to %2$d' ), $param, $args['maximum'] )
+                       );
</ins><span class="cx" style="display: block; padding: 0 10px">                 }
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        if ( ! empty( $args['enum'] ) ) {
-               $enum_contains_value = rest_validate_enum( $value, $args, $param );
-               if ( is_wp_error( $enum_contains_value ) ) {
-                       return $enum_contains_value;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( isset( $args['minimum'], $args['maximum'] ) ) {
+               if ( ! empty( $args['exclusiveMinimum'] ) && ! empty( $args['exclusiveMaximum'] ) ) {
+                       if ( $value >= $args['maximum'] || $value <= $args['minimum'] ) {
+                               return new WP_Error(
+                                       'rest_out_of_bounds',
+                                       /* translators: 1: Parameter, 2: Minimum number, 3: Maximum number. */
+                                       sprintf(
+                                               __( '%1$s must be between %2$d (exclusive) and %3$d (exclusive)' ),
+                                               $param,
+                                               $args['minimum'],
+                                               $args['maximum']
+                                       )
+                               );
+                       }
</ins><span class="cx" style="display: block; padding: 0 10px">                 }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        }
</del><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        // The "format" keyword should only be applied to strings. However, for backward compatibility,
-       // we allow the "format" keyword if the type keyword was not specified, or was set to an invalid value.
-       if ( isset( $args['format'] )
-               && ( ! isset( $args['type'] ) || 'string' === $args['type'] || ! in_array( $args['type'], $allowed_types, true ) )
-       ) {
-               switch ( $args['format'] ) {
-                       case 'hex-color':
-                               if ( ! rest_parse_hex_color( $value ) ) {
-                                       return new WP_Error( 'rest_invalid_hex_color', __( 'Invalid hex color.' ) );
-                               }
-                               break;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         if ( ! empty( $args['exclusiveMinimum'] ) && empty( $args['exclusiveMaximum'] ) ) {
+                       if ( $value > $args['maximum'] || $value <= $args['minimum'] ) {
+                               return new WP_Error(
+                                       'rest_out_of_bounds',
+                                       /* translators: 1: Parameter, 2: Minimum number, 3: Maximum number. */
+                                       sprintf(
+                                               __( '%1$s must be between %2$d (exclusive) and %3$d (inclusive)' ),
+                                               $param,
+                                               $args['minimum'],
+                                               $args['maximum']
+                                       )
+                               );
+                       }
+               }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        case 'date-time':
-                               if ( ! rest_parse_date( $value ) ) {
-                                       return new WP_Error( 'rest_invalid_date', __( 'Invalid date.' ) );
-                               }
-                               break;
-
-                       case 'email':
-                               if ( ! is_email( $value ) ) {
-                                       return new WP_Error( 'rest_invalid_email', __( 'Invalid email address.' ) );
-                               }
-                               break;
-                       case 'ip':
-                               if ( ! rest_is_ip_address( $value ) ) {
-                                       /* translators: %s: IP address. */
-                                       return new WP_Error( 'rest_invalid_ip', sprintf( __( '%s is not a valid IP address.' ), $param ) );
-                               }
-                               break;
-                       case 'uuid':
-                               if ( ! wp_is_uuid( $value ) ) {
-                                       /* translators: %s: The name of a JSON field expecting a valid UUID. */
-                                       return new WP_Error( 'rest_invalid_uuid', sprintf( __( '%s is not a valid UUID.' ), $param ) );
-                               }
-                               break;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         if ( ! empty( $args['exclusiveMaximum'] ) && empty( $args['exclusiveMinimum'] ) ) {
+                       if ( $value >= $args['maximum'] || $value < $args['minimum'] ) {
+                               return new WP_Error(
+                                       'rest_out_of_bounds',
+                                       /* translators: 1: Parameter, 2: Minimum number, 3: Maximum number. */
+                                       sprintf(
+                                               __( '%1$s must be between %2$d (inclusive) and %3$d (exclusive)' ),
+                                               $param,
+                                               $args['minimum'],
+                                               $args['maximum']
+                                       )
+                               );
+                       }
</ins><span class="cx" style="display: block; padding: 0 10px">                 }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        }
</del><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        if ( in_array( $args['type'], array( 'number', 'integer' ), true ) && ( isset( $args['minimum'] ) || isset( $args['maximum'] ) ) ) {
-               if ( isset( $args['minimum'] ) && ! isset( $args['maximum'] ) ) {
-                       if ( ! empty( $args['exclusiveMinimum'] ) && $value <= $args['minimum'] ) {
-                               /* translators: 1: Parameter, 2: Minimum number. */
-                               return new WP_Error( 'rest_out_of_bounds', sprintf( __( '%1$s must be greater than %2$d' ), $param, $args['minimum'] ) );
-                       } elseif ( empty( $args['exclusiveMinimum'] ) && $value < $args['minimum'] ) {
-                               /* translators: 1: Parameter, 2: Minimum number. */
-                               return new WP_Error( 'rest_out_of_bounds', sprintf( __( '%1$s must be greater than or equal to %2$d' ), $param, $args['minimum'] ) );
-                       }
-               } elseif ( isset( $args['maximum'] ) && ! isset( $args['minimum'] ) ) {
-                       if ( ! empty( $args['exclusiveMaximum'] ) && $value >= $args['maximum'] ) {
-                               /* translators: 1: Parameter, 2: Maximum number. */
-                               return new WP_Error( 'rest_out_of_bounds', sprintf( __( '%1$s must be less than %2$d' ), $param, $args['maximum'] ) );
-                       } elseif ( empty( $args['exclusiveMaximum'] ) && $value > $args['maximum'] ) {
-                               /* translators: 1: Parameter, 2: Maximum number. */
-                               return new WP_Error( 'rest_out_of_bounds', sprintf( __( '%1$s must be less than or equal to %2$d' ), $param, $args['maximum'] ) );
-                       }
-               } elseif ( isset( $args['maximum'] ) && isset( $args['minimum'] ) ) {
-                       if ( ! empty( $args['exclusiveMinimum'] ) && ! empty( $args['exclusiveMaximum'] ) ) {
-                               if ( $value >= $args['maximum'] || $value <= $args['minimum'] ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         if ( empty( $args['exclusiveMinimum'] ) && empty( $args['exclusiveMaximum'] ) ) {
+                       if ( $value > $args['maximum'] || $value < $args['minimum'] ) {
+                               return new WP_Error(
+                                       'rest_out_of_bounds',
</ins><span class="cx" style="display: block; padding: 0 10px">                                         /* translators: 1: Parameter, 2: Minimum number, 3: Maximum number. */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        return new WP_Error( 'rest_out_of_bounds', sprintf( __( '%1$s must be between %2$d (exclusive) and %3$d (exclusive)' ), $param, $args['minimum'], $args['maximum'] ) );
-                               }
-                       } elseif ( empty( $args['exclusiveMinimum'] ) && ! empty( $args['exclusiveMaximum'] ) ) {
-                               if ( $value >= $args['maximum'] || $value < $args['minimum'] ) {
-                                       /* translators: 1: Parameter, 2: Minimum number, 3: Maximum number. */
-                                       return new WP_Error( 'rest_out_of_bounds', sprintf( __( '%1$s must be between %2$d (inclusive) and %3$d (exclusive)' ), $param, $args['minimum'], $args['maximum'] ) );
-                               }
-                       } elseif ( ! empty( $args['exclusiveMinimum'] ) && empty( $args['exclusiveMaximum'] ) ) {
-                               if ( $value > $args['maximum'] || $value <= $args['minimum'] ) {
-                                       /* translators: 1: Parameter, 2: Minimum number, 3: Maximum number. */
-                                       return new WP_Error( 'rest_out_of_bounds', sprintf( __( '%1$s must be between %2$d (exclusive) and %3$d (inclusive)' ), $param, $args['minimum'], $args['maximum'] ) );
-                               }
-                       } elseif ( empty( $args['exclusiveMinimum'] ) && empty( $args['exclusiveMaximum'] ) ) {
-                               if ( $value > $args['maximum'] || $value < $args['minimum'] ) {
-                                       /* translators: 1: Parameter, 2: Minimum number, 3: Maximum number. */
-                                       return new WP_Error( 'rest_out_of_bounds', sprintf( __( '%1$s must be between %2$d (inclusive) and %3$d (inclusive)' ), $param, $args['minimum'], $args['maximum'] ) );
-                               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 sprintf(
+                                               __( '%1$s must be between %2$d (inclusive) and %3$d (inclusive)' ),
+                                               $param,
+                                               $args['minimum'],
+                                               $args['maximum']
+                                       )
+                               );
</ins><span class="cx" style="display: block; padding: 0 10px">                         }
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2385,6 +2493,97 @@
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * Validates a string value based on a schema.
+ *
+ * @since 5.7.0
+ *
+ * @param mixed  $value The value to validate.
+ * @param array  $args  Schema array to use for validation.
+ * @param string $param The parameter name, used in error messages.
+ * @return true|WP_Error
+ */
+function rest_validate_string_value_from_schema( $value, $args, $param ) {
+       if ( ! is_string( $value ) ) {
+               return new WP_Error(
+                       'rest_invalid_type',
+                       /* translators: 1: Parameter, 2: Type name. */
+                       sprintf( __( '%1$s is not of type %2$s.' ), $param, 'string' ),
+                       array( 'param' => $param )
+               );
+       }
+
+       if ( isset( $args['minLength'] ) && mb_strlen( $value ) < $args['minLength'] ) {
+               return new WP_Error(
+                       'rest_too_short',
+                       /* translators: 1: Parameter, 2: Number of characters. */
+                       sprintf(
+                               _n(
+                                       '%1$s must be at least %2$s character long.',
+                                       '%1$s must be at least %2$s characters long.',
+                                       $args['minLength']
+                               ),
+                               $param,
+                               number_format_i18n( $args['minLength'] )
+                       )
+               );
+       }
+
+       if ( isset( $args['maxLength'] ) && mb_strlen( $value ) > $args['maxLength'] ) {
+               return new WP_Error(
+                       'rest_too_long',
+                       /* translators: 1: Parameter, 2: Number of characters. */
+                       sprintf(
+                               _n(
+                                       '%1$s must be at most %2$s character long.',
+                                       '%1$s must be at most %2$s characters long.',
+                                       $args['maxLength']
+                               ),
+                               $param,
+                               number_format_i18n( $args['maxLength'] )
+                       )
+               );
+       }
+
+       if ( isset( $args['pattern'] ) && ! rest_validate_json_schema_pattern( $args['pattern'], $value ) ) {
+               return new WP_Error(
+                       'rest_invalid_pattern',
+                       /* translators: 1: Parameter, 2: Pattern. */
+                       sprintf( __( '%1$s does not match pattern %2$s.' ), $param, $args['pattern'] )
+               );
+       }
+
+       return true;
+}
+
+/**
+ * Validates an integer value based on a schema.
+ *
+ * @since 5.7.0
+ *
+ * @param mixed  $value The value to validate.
+ * @param array  $args  Schema array to use for validation.
+ * @param string $param The parameter name, used in error messages.
+ * @return true|WP_Error
+ */
+function rest_validate_integer_value_from_schema( $value, $args, $param ) {
+       $is_valid_number = rest_validate_number_value_from_schema( $value, $args, $param );
+       if ( is_wp_error( $is_valid_number ) ) {
+               return $is_valid_number;
+       }
+
+       if ( ! rest_is_integer( $value ) ) {
+               return new WP_Error(
+                       'rest_invalid_type',
+                       /* translators: 1: Parameter, 2: Type name. */
+                       sprintf( __( '%1$s is not of type %2$s.' ), $param, 'integer' ),
+                       array( 'param' => $param )
+               );
+       }
+
+       return true;
+}
+
+/**
</ins><span class="cx" style="display: block; padding: 0 10px">  * Sanitize a value based on a schema.
</span><span class="cx" style="display: block; padding: 0 10px">  *
</span><span class="cx" style="display: block; padding: 0 10px">  * @since 4.7.0
</span></span></pre>
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