Improve readability of primaryUserId adjustment

pgpainless-core/src/main/kotlin/org/pgpainless/key/generation/GenerateOpenPgpKey.kt

@@ -147,26 +147,30 @@ open class GenerateOpenPgpKey(
             userId: CharSequence,
             subpacketsCallback: SelfSignatureSubpackets.Callback = SelfSignatureSubpackets.nop()
         ) = apply {
-            val hasPrimaryUID =
-                primaryKey.pair.publicKey.userIDs.asSequence().any { uid ->
-                    primaryKey.pair.publicKey.getSignaturesForID(uid).asSequence().any {
-                        it.hashedSubPackets.isPrimaryUserID
-                    }
-                }
-            val setPrimaryUID =
-                SelfSignatureSubpackets.applyHashed {
-                    if (hasPrimaryUID) {
-                        setPrimaryUserId(null)
-                    } else {
-                        setPrimaryUserId()
-                    }
-                }
             primaryKey.userId(
                 userId,
                 subpacketsCallback =
-                    preferencesCallback.then(setPrimaryUID).then(subpacketsCallback))
+                    preferencesCallback.then(adjustPrimaryUserId()).then(subpacketsCallback))
         }
 
+        private fun adjustPrimaryUserId() =
+            SelfSignatureSubpackets.applyHashed {
+                if (primaryKeyHasPrimaryUserId()) {
+                    setPrimaryUserId(null)
+                } else {
+                    setPrimaryUserId()
+                }
+            }
+
+        private fun primaryKeyHasPrimaryUserId() =
+            primaryKey.pair.publicKey.let { pk ->
+                pk.userIDs.asSequence().any { uid ->
+                    pk.getSignaturesForID(uid).asSequence().any {
+                        it.hashedSubPackets.isPrimaryUserID
+                    }
+                }
+            }
+
         /**
          * Add a user-attribute to the key. The subpackets of the binding signature are
          * prepopulated, setting algorithm preferences and features. However, the subpackets can
@@ -302,7 +306,8 @@ open class GenerateOpenPgpKey(
 
             return PGPSecretKeyRing(
                 mutableListOf(
-                        toSecretKey(primaryKey, true, protector.getEncryptor(primaryKey.pair.keyID)))
+                        toSecretKey(
+                            primaryKey, true, protector.getEncryptor(primaryKey.pair.keyID)))
                     .plus(
                         subkeys.map {
                             toSecretKey(it, false, protector.getEncryptor(it.pair.keyID))

pgpainless-core/src/main/kotlin/org/pgpainless/key/generation/OpenPgpComponentKeyBuilder.kt

@@ -215,7 +215,8 @@ class OpenPgpComponentKeyBuilder {
 
                 // Create back-sig
                 val backSigBuilder =
-                    PrimaryKeyBindingSignatureBuilder(pair.privateKey, pair.publicKey, hashAlgorithm)
+                    PrimaryKeyBindingSignatureBuilder(
+                        pair.privateKey, pair.publicKey, hashAlgorithm)
 
                 backSigBuilder.hashedSubpackets.setSignatureCreationTime(bindingTime)