Consolidate system sender messages into single message.

Author: NJahreis

classes/local/question_generator.php

@@ -74,20 +74,7 @@ public function generate_question(stdClass $dataobject, bool $sendexistingquesti
 
         $provider = get_config('qbank_questiongen', 'provider');
         if ($provider === 'local_ai_manager') {
-            $messages = [
-                [
-                    'sender' => 'system',
-                    'message' => $primer,
-                ],
-                [
-                    'sender' => 'system',
-                    'message' => $instructions,
-                ],
-                [
-                    'sender' => 'system',
-                    'message' => $example,
-                ],
-            ];
+            $systemprompt = $primer . " " . $instructions . " " . $example;
 
             if ($sendexistingquestionsascontext) {
                 $questionidsincategory = question_bank::get_finder()->get_questions_from_categories([$dataobject->category], null);
@@ -106,11 +93,7 @@ public function generate_question(stdClass $dataobject, bool $sendexistingquesti
                     $questiontextsinqbankprompt = 'The question that will be generated by you has to be different '
                         . 'from all of the following questions in this JSON string: "'
                         . json_encode($questiontextsinqbankcat) . '"';
-                    $messages[] =
-                        [
-                            'sender' => 'system',
-                            'message' => $questiontextsinqbankprompt,
-                        ];
+                    $systemprompt = $systemprompt . " " . $questiontextsinqbankprompt;
                 }
             }
 
@@ -128,11 +111,16 @@ public function generate_question(stdClass $dataobject, bool $sendexistingquesti
                     break;
             }
 
-            $messages[] =
+            $messages = [
+                [
+                    'sender' => 'system',
+                    'message' => $systemprompt,
+                ],
                 [
                     'sender' => 'user',
                     'message' => $storyprompt,
-                ];
+                ],
+            ];
 
             [
                 'generatedquestiontext' => $generatedquestiontext,