Introduce hasKeyId on JwksClaim

Author: cicnavi

src/Claims/JwksClaim.php

@@ -46,4 +46,19 @@ public function jsonSerialize(): array
             $this->name => $this->value,
         ];
     }
+
+
+    /**
+     * Check whether the JWKS contains a key with the given key ID.
+     */
+    public function hasKeyId(string $keyId): bool
+    {
+        foreach ($this->value[ClaimsEnum::Keys->value] as $key) {
+            if ($key[ClaimsEnum::Kid->value] === $keyId) {
+                return true;
+            }
+        }
+
+        return false;
+    }
 }

tests/src/Claims/JwksClaimTest.php

@@ -65,4 +65,13 @@ public function testCanGetProperties(): void
             $this->sut()->jsonSerialize(),
         );
     }
+
+
+    public function testCanCheckIfKeyIdExists(): void
+    {
+        $sut = $this->sut();
+
+        $this->assertTrue($sut->hasKeyId('F4VFObNusj3PHmrHxpqh4GNiuFHlfh-2s6xMJ95fLYA'));
+        $this->assertFalse($sut->hasKeyId('invalid-key-id'));
+    }
 }