Add method to indicate completeness.

app/Import/Prerequisites/BunqPrerequisites.php

@@ -91,6 +91,22 @@ class BunqPrerequisites implements PrerequisitesInterface
         return !$hasApiKey || !$hasServerIP;
     }
 
+    /**
+     * Indicate if all prerequisites have been met.
+     *
+     * @return bool
+     */
+    public function isComplete(): bool
+    {
+        // is complete when user has entered both the API key
+        // and his IP address.
+
+        $hasApiKey   = $this->hasApiKey();
+        $hasServerIP = $this->hasServerIP();
+
+        return $hasApiKey && $hasServerIP;
+    }
+
     /**
      * Set the user for this Prerequisites-routine. Class is expected to implement and save this.
      *

app/Import/Prerequisites/FilePrerequisites.php

@@ -75,6 +75,17 @@ class FilePrerequisites implements PrerequisitesInterface
         return false;
     }
 
+    /**
+     * Indicate if all prerequisites have been met.
+     *
+     * @return bool
+     */
+    public function isComplete(): bool
+    {
+        // has no prerequisites, so always return true.
+        return true;
+    }
+
     /**
      * Set the user for this Prerequisites-routine. Class is expected to implement and save this.
      *

app/Import/Prerequisites/PrerequisitesInterface.php

@@ -53,6 +53,13 @@ interface PrerequisitesInterface
      */
     public function hasPrerequisites(): bool;
 
+    /**
+     * Indicate if all prerequisites have been met.
+     *
+     * @return bool
+     */
+    public function isComplete(): bool;
+
     /**
      * Set the user for this Prerequisites-routine. Class is expected to implement and save this.
      *

app/Import/Prerequisites/SpectrePrerequisites.php

@@ -87,6 +87,29 @@ class SpectrePrerequisites implements PrerequisitesInterface
         return false;
     }
 
+    /**
+     * Indicate if all prerequisites have been met.
+     *
+     * @return bool
+     */
+    public function isComplete(): bool
+    {
+        // return true when user has set the App Id and the Spectre Secret.
+        $values = [
+            Preferences::getForUser($this->user, 'spectre_app_id', false),
+            Preferences::getForUser($this->user, 'spectre_secret', false),
+        ];
+        $result = true;
+        /** @var Preference $value */
+        foreach ($values as $value) {
+            if (false === $value->data || null === $value->data) {
+                $result = false;
+            }
+        }
+
+        return $result;
+    }
+
     /**
      * Set the user for this Prerequisites-routine. Class is expected to implement and save this.
      *