1 files changed, 58 insertions, 0 deletions
diff --git a/vendor/open-telemetry/sdk/Common/Attribute/AttributeValidator.php b/vendor/open-telemetry/sdk/Common/Attribute/AttributeValidator.php
new file mode 100644
index 000000000..e9a1f7334
--- /dev/null
+++ b/vendor/open-telemetry/sdk/Common/Attribute/AttributeValidator.php
@@ -0,0 +1,58 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenTelemetry\SDK\Common\Attribute;
+
+class AttributeValidator implements AttributeValidatorInterface
+{
+    private const PRIMITIVES = [
+        'string',
+        'integer',
+        'double',
+        'boolean',
+    ];
+    private const NUMERICS = [
+        'double',
+        'integer',
+    ];
+
+    /**
+     * Validate whether a value is a primitive, or a homogeneous array of primitives (treating int/double as equivalent).
+     * @see https://github.com/open-telemetry/opentelemetry-specification/blob/v1.21.0/specification/common/README.md#attribute
+     */
+    public function validate($value): bool
+    {
+        if (is_array($value)) {
+            return $this->validateArray($value);
+        }
+
+        return in_array(gettype($value), self::PRIMITIVES);
+    }
+
+    private function validateArray(array $value): bool
+    {
+        if ($value === []) {
+            return true;
+        }
+        $type = gettype(reset($value));
+        if (!in_array($type, self::PRIMITIVES)) {
+            return false;
+        }
+        foreach ($value as $v) {
+            if (in_array(gettype($v), self::NUMERICS) && in_array($type, self::NUMERICS)) {
+                continue;
+            }
+            if (gettype($v) !== $type) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    public function getInvalidMessage(): string
+    {
+        return 'attribute with non-primitive or non-homogeneous array of primitives dropped';
+    }
+}