From 2a0079c83c5fe79588b4c82d7df92f670c915c6e Mon Sep 17 00:00:00 2001
From: Julio Montoya <gugli100@gmail.com>
Date: Sun, 27 Oct 2019 11:28:52 +0100
Subject: [PATCH] Minor - Update from 1.11.x

---
 tests/scripts/fix_mimetex.php | 128 ++++++++++++++++++++++++++++++++++
 1 file changed, 128 insertions(+)
 create mode 100644 tests/scripts/fix_mimetex.php

diff --git a/tests/scripts/fix_mimetex.php b/tests/scripts/fix_mimetex.php
new file mode 100644
index 0000000000..5d742d77db
--- /dev/null
+++ b/tests/scripts/fix_mimetex.php
@@ -0,0 +1,128 @@
+<?php
+/* For licensing terms, see /license.txt */
+
+exit;
+
+require_once __DIR__ . '/../../main/inc/global.inc.php';
+
+$sql = 'SELECT iid, id, question, c_id
+        FROM c_quiz_question
+        ORDER BY iid';
+
+$result = Database::query($sql);
+$data = Database::store_result($result);
+$counter = 1;
+$total = count($data);
+echo 'Exercises to check: '.$total.PHP_EOL;
+
+foreach ($data as $row) {
+    $id = $row['id'];
+    $courseId = $row['c_id'];
+
+    $content = fixText($row['question']);
+    $params = [
+        'question' => $content
+    ];
+    Database::update('c_quiz_question', $params, ['id = ? and c_id = ?' => [$id, $courseId]]);
+
+    $sql = "SELECT iid, answer, comment FROM c_quiz_answer WHERE question_id = $id and c_id = $courseId";
+    $result = Database::query($sql);
+    $items = Database::store_result($result, 'ASSOC');
+    foreach ($items as $item) {
+        $id = $item['iid'];
+        $answer = fixText($item['answer']);
+        $comment = fixText($item['comment']);
+        $params = [
+            'answer' => $answer,
+            'comment' => $comment,
+        ];
+        Database::update('c_quiz_answer', $params, ['iid = ? ' => $id]);
+    }
+}
+
+function fixText($content)
+{
+    $debug = false;
+    if (strpos($content, 'mimetex.cgi') !== false) {
+        $content = preg_replace('/[\r\n]+/', '', $content);
+        //$debug = true;
+        if ($debug) {
+            var_dump($content);
+        }
+    }
+
+    $matches = [];
+    if (preg_match_all('/<img alt="(.*?)" (.*?)mimetex.cgi\? (.*?)\/>/', $content, $matches)) {
+        $count = count($matches[0]);
+        for ($i = 0; $i <= $count; $i++) {
+            if (isset($matches[0]) && isset($matches[0][$i])) {
+                $value = "<span class=\"math-tex\">`".$matches[1][$i]."`</span>";
+                $content = str_replace($matches[0][$i], $value, $content);
+            }
+        }
+    }
+
+    $matches = [];
+    /*<img (.*)mimetex.cgi\?(.*) title="(.*)?" alt="(.*)?" \/>
+    <img (.*)?mimetex.cgi\? (.*)? title="(.*)?" alt="(.*)?" \/>*/
+   // if       (preg_match_all('/<img (.*)?mimetex.cgi\? (.*)? title="(.*)?" alt="(.*)?" \/>/', $content, $matches)) {
+    if (preg_match_all('/<img (.*?)mimetex.cgi\?(.*?) title="(.*?)" alt="(.*?)"/', $content, $matches)) {
+        $count = count($matches[0]);
+        for ($i = 0; $i <= $count; $i++) {
+            if (isset($matches[0]) && isset($matches[0][$i])) {
+                $value = "<span class=\"math-tex\">`".$matches[3][$i]."`</span>";
+                $content = str_replace($matches[0][$i], $value, $content);
+            }
+        }
+    }
+
+    $matches = [];
+    if (preg_match_all('/<img (.*?)mimetex.cgi\? (.*?) alt="(.*?)" title="(.*?)" \/>/', $content, $matches)) {
+        $count = count($matches[0]);
+        for ($i = 0; $i <= $count; $i++) {
+            if (isset($matches[0]) && isset($matches[0][$i])) {
+                $value = "<span class=\"math-tex\">`".$matches[3][$i]."`</span>";
+                $content = str_replace($matches[0][$i], $value, $content);
+            }
+        }
+    }
+
+    $matches = [];
+    if (preg_match_all('/<img (.*?)mimetex.cgi\?(.*?)title="(.*?)" alt="(.*?)"/', $content, $matches)) {
+        $count = count($matches[0]);
+        for ($i = 0; $i <= $count; $i++) {
+            if (isset($matches[0]) && isset($matches[0][$i])) {
+                $value = "<span class=\"math-tex\">`".$matches[3][$i]."`</span>";
+                $content = str_replace($matches[0][$i], $value, $content);
+            }
+        }
+    }
+
+    $matches = [];
+    if (preg_match_all('/<img (.*?)mimetex.cgi\? (.*?) title="(.*?)" alt="(.*?)"\/>/', $content, $matches)) {
+        $count = count($matches[0]);
+        for ($i = 0; $i <= $count; $i++) {
+            if (isset($matches[0]) && isset($matches[0][$i])) {
+                $value = "<span class=\"math-tex\">`".$matches[3][$i]."`</span>";
+                $content = str_replace($matches[0][$i], $value, $content);
+            }
+        }
+    }
+
+    $matches = [];
+    if (preg_match_all('/<img title="(.*?)" (.*?)mimetex.cgi\? (.*?) \/>/', $content, $matches)) {
+        $count = count($matches[0]);
+        for ($i = 0; $i <= $count; $i++) {
+            if (isset($matches[0]) && isset($matches[0][$i])) {
+                $value = "<span class=\"math-tex\">`".$matches[3][$i]."`</span>";
+                $content = str_replace($matches[0][$i], $value, $content);
+            }
+        }
+    }
+
+    if ($debug) {
+        var_dump($content);
+    }
+
+    return $content;
+}