From 24f7204e9fe2319a35685115f8c583c27cca38c3 Mon Sep 17 00:00:00 2001
From: Thomas de Roo <2+thomas@noreply.localhost>
Date: Mon, 15 Jun 2026 12:24:07 +0200
Subject: [PATCH] Update api/answer.php

---
 api/answer.php | 94 ++++++++++++++++++++++++++++++++++++++------------
 1 file changed, 71 insertions(+), 23 deletions(-)

diff --git a/api/answer.php b/api/answer.php
index 8742485..3a9e7b2 100644
--- a/api/answer.php
+++ b/api/answer.php
@@ -1,49 +1,97 @@
 <?php
 
-require_once '../includes/config.php';
-require_once '../includes/functions.php';
-require_once '../includes/jsondb.php';
-require_once '../includes/srs.php';
-require_once '../includes/auth.php';
+require_once __DIR__ . '/../includes/config.php';
+require_once __DIR__ . '/../includes/functions.php';
+require_once __DIR__ . '/../includes/jsondb.php';
+require_once __DIR__ . '/../includes/srs.php';
+require_once __DIR__ . '/../includes/auth.php';
 
 requireLogin();
 
+header('Content-Type: application/json; charset=utf-8');
+
 $user = $_SESSION['user'];
 
-function normalize(string $s): string
-{
-    $s = strtolower(trim($s));
-    $s = preg_replace('/\s+/', ' ', $s);
-    return $s;
+$inputRaw = file_get_contents('php://input');
+$input = json_decode($inputRaw, true);
+
+if (!is_array($input)) {
+    echo json_encode([
+        'error' => 'invalid_json'
+    ]);
+    exit;
 }
 
-$input = json_decode(file_get_contents('php://input'), true);
-
-$lang = $input['lang'];
-$list = $input['list'];
-$wordId = (int)$input['wordId'];
-$userAnswer = trim($input['answer']);
+$lang = $input['lang'] ?? '';
+$list = $input['list'] ?? '';
+$wordId = (int)($input['wordId'] ?? 0);
+$userAnswer = trim($input['answer'] ?? '');
 
 $file = listPath($user, $lang, $list);
-
 $data = JsonDB::read($file);
 
+if (!isset($data['words']) || !is_array($data['words'])) {
+    echo json_encode([
+        'error' => 'list_not_found'
+    ]);
+    exit;
+}
+
 $correct = false;
+$updated = false;
 
-foreach ($data['words'] as $word) {
+foreach ($data['words'] as &$word) {
 
-    if ($word['id'] === $wordId) {
+    if ((int)$word['id'] === $wordId) {
 
-        $correct =
-            normalize($word['answer']) === normalize($userAnswer);
+        // init stats veilig
+        if (!isset($word['correct'])) $word['correct'] = 0;
+        if (!isset($word['wrong'])) $word['wrong'] = 0;
+
+        // normalize compare
+        $expected = strtolower(trim($word['answer']));
+        $given = strtolower(trim($userAnswer));
+
+        $correct = ($expected === $given);
+
+        // update stats
+        if ($correct) {
+            $word['correct']++;
+        } else {
+            $word['wrong']++;
+        }
+
+        // SRS update (nextReview + interval)
         updateWordStats($word, $correct);
 
+        $updated = true;
         break;
     }
 }
 
-JsonDB::write($file, $data);
+// als woord niet gevonden is
+if (!$updated) {
+    echo json_encode([
+        'error' => 'word_not_found',
+        'wordId' => $wordId
+    ]);
+    exit;
+}
+
+// write back
+$ok = JsonDB::write($file, $data);
+
+if (!$ok) {
+    echo json_encode([
+        'error' => 'write_failed'
+    ]);
+    exit;
+}
 
 echo json_encode([
-    'correct' => $correct
+    'correct' => $correct,
+    'stats' => [
+        'wordId' => $wordId,
+        'correct' => $correct ? 1 : 0
+    ]
 ]);
\ No newline at end of file