feat(UrlShortner): add module

modules/urlshortner/urlshortner.php

@@ -0,0 +1,115 @@
+<?php
+
+$path = __DIR__ . '/../../tmp/urlshortner';
+
+function saveUrls($urlsToStore) {
+  global $path;
+  $data = json_encode([
+    'updated_at' => date('Y-m-d H:i:s'),
+    'urls' => $urlsToStore
+  ]);
+  file_put_contents($path . '/urls.json', $data);
+}
+
+if (!file_exists($path)) {
+  mkdir($path);
+}
+
+if (!file_exists($path . '/urls.json') || file_get_contents($path . '/urls.json') === '') {
+  file_put_contents($path . '/urls.json', '{"urls": []}');
+}
+
+$urls = json_decode(file_get_contents($path . '/urls.json'), true)['urls'];
+
+if (strpos($_SERVER['REQUEST_URI'], '/admin') === 0) {
+  // admin panel
+  askAuth($config['auth']);
+
+  if (strpos($_SERVER['REQUEST_URI'], '/create') !== false) {
+    $url = [
+      'slug' => $_GET['slug'] ?? $_GET['name'] ?? '',
+      'target' => $_GET['target'] ?? '',
+      'created_at' => date('Y-m-d H:i:s')
+    ];
+    if (empty($url['slug']) || empty($url['target'])) {
+      echo "Invalid values slug or target";
+      http_response_code(400);
+      exit();
+    }
+    $urls[] = $url;
+
+    echo "Url was created";
+    saveUrls($urls);
+    if (isset($_GET['redirect'])) {
+      header('Location: ' . $_GET['redirect']);
+      http_response_code(302);
+    }
+    exit();
+  }
+  if (strpos($_SERVER['REQUEST_URI'], '/delete') !== false) {
+    if (!isset($_GET['slug']) || empty($_GET['slug'])) {
+      echo "Slug param missing";
+      http_response_code(400);
+      exit();
+    }
+    $urls = array_filter([], fn ($u) => $u['slug'] !== $_GET['slug']);
+    echo "The urls with this slug were deleted";
+
+    saveUrls($urls);
+    if (isset($_GET['redirect'])) {
+      header('Location: ' . $_GET['redirect']);
+    }
+    exit();
+  }
+  ?>
+  <h1>Url list</h1>
+  <b>Add a URL</b>
+  <form method="get" action="/admin/create">
+    <label for="slug">Slug</label>
+    <input type="text" name="slug" id="slug" />
+    
+    <br>
+    <label for="target">Target (link)</label>
+    <input type="url" name="target" id="target" style="min-width: 80%" />
+
+    <input type="hidden" name="redirect" value="/admin" />
+    <br>
+    <button>Create Shortcut</button>
+  </form>
+  <hr>
+  <div>
+  <?php
+  foreach ($urls as $url) {
+   ?>
+   <div 
+    style="
+      max-width: 900px;
+      display: flex;
+      justify-content: space-between;
+      border: 1px solid gray;
+      margin-bottom: .4em
+    ">
+      <div>
+        /<?= $url['slug'] ?> : <a href="<?= $url['target'] ?>"><?= $url['target'] ?></a>
+      </div>
+      <a href="/admin/delete?slug=<?= $url['slug'] ?>&redirect=/admin">Delete</a>
+    </div>
+   <?php
+  }
+  ?>
+  </div>
+  <?php
+  exit();
+}
+
+foreach ($urls as $url) {
+  if (strpos($_SERVER['REQUEST_URI'], '/' . $url['slug']) === 0) {
+    header('Location: ' . $url['target']);
+    http_response_code(302);
+    echo "You've been redirected";
+    exit();
+  }
+}
+
+http_response_code(404);
+echo 'ERR: Unknown url';