front-end: putting everything together

14 files changed, 406 insertions, 204 deletions

diff --git a/public/app/controllers/Auth.php b/public/app/controllers/Auth.php
index b00843c..0570a5e 100644
--- a/public/app/controllers/Auth.php
+++ b/public/app/controllers/Auth.php
@@ -186,7 +186,7 @@ class Auth {
         $manager = new Classroom_manager();
         if ($manager->hasUserToken()) {
 
-            echo 'user is connected';
+            // user is connected;
             $token = $manager->getUserToken();
             $user = $token->getUser();
 
@@ -226,9 +226,19 @@ class Auth {
      * to access the source
      * 
      */
-    public static function hasPermition($permit = [])
+    public static function hasPermition($permit = [0])
     {
-        if ($permit == [])    return true;
+        if (in_array(0, $permit)) {     // permision 0 means public
+            return true;        // permision 0 is always granted
+        }
+
+        if ($user = $this->is_connected() === flase) {      // if not connected
+            return false;           // then no other permition is granted
+        }
+
+        if ($user instanceof UserInterface) {
+            return ( !empty( array_intersect($permit, $user->getPrivileges()) ) );
+        }
     }
 
 
@@ -243,11 +253,11 @@ class Auth {
      * example:
      * [
      *    [
-     *       role => ['editor','designer']
+     *       role => [2, 3]
      *       permition => ['10', '12', '18']
      *    ],
      *    [
-     *       role => ['admin' , 'developερ']
+     *       role => [1 , 4]
      *    ],
      *    [
      *       permition => [ 3 ]
@@ -256,12 +266,12 @@ class Auth {
      * 
      * defines (and parses to) a requirements rule of:
      * [
-     *    user should be editor or designer
-     *    and have permition 10 or 12 or 18
+     *    user should be creator or editor
+     *    _AND_ have permition 10 or 12 or 18
      * ]
      * OR
      * [
-     *    user should be an administratoe or developer
+     *    user should be an administrator or developer
      * ]
      * OR
      * [
@@ -274,17 +284,25 @@ class Auth {
     {
         $authorized = false;
         foreach($requirements as $required) {
-            if ( (self::isGranted($required['role'] ?? []))
-            && (self::hasPermition($required['permition'] ?? [])) ) {
-                $authorized = true;
+
+            if (isset($required['role'])) {         // if a role is required
+                if ( (self::isGranted($required['role']))       // authorize both role
+                && (self::hasPermition($required['permition'] ?? [ 0 ])) ) {    // and permition
+                    // $authorized = true;
+                    return true;
+                }
+
+            } else {    // else, if not is not required
+                if (self::hasPermition($required['permition'] ?? [ 0 ])) {  // authorize permition
+                    // $authorized = true;
+                    return true;
+                }
             }
         }
         return $authorized;
     }
 
 
-
-
     public static function forgot_pass()
     {
     }
@@ -322,10 +340,10 @@ class Auth {
     }
 
 
-    public static function is_admin()
+    public static function in_admin_group()
     {
         $manager = new Classroom_manager();
-        return ($manager->isGranted([1,2,3]));
+        return ($manager->isGranted([1, 2, 3]));
     }
 
 
diff --git a/public/app/controllers/Product.php b/public/app/controllers/Product.php
deleted file mode 100644
index 0193ed9..0000000
--- a/public/app/controllers/Product.php
+++ /dev/null
@@ -1,52 +0,0 @@
-<?php
-
-namespace app\controllers;
-
-use app\models\market\Product_model;
-use app\models\market\ProductCategories_model;
-
-class Product {
-
-    public static function fromUrl($url, $pathArr)
-    {
-        $product = proxy([\app\models\market\Product_model::class, 'fromUrl'],
-            [ $url ], CACHE_PRODUCT_TTL
-        );
-
-        // TODO:
-        // verify path, else redirect
-
-        if ($product === false) {
-            header("HTTP/1.0 404 Not Found");
-            render_view('error/404', ['message' => 'Of all the things I\'ve lost, I miss my mind the most.']);
-            return ;
-        }
-
-        // render page
-        load_template('products', [ 'data' => [
-                'title' => $product['Title'],
-                'seo'   => [],
-                'tree'  => proxy(
-                    [\app\models\market\ProductCategories_model::class, 'tree'],
-                    [], CACHE_ROOT_TTL
-                ),
-                'hierarchyPath' => explode('.', substr($product['Hierarchy'], 1, -1)),
-                'sections' => [
-                    [
-                        'view' => 'content/product_list/Product_List_Filters',
-                        'key' => 'filters',
-                        'data' => []
-                    ],
-                    [
-                        'view' => 'content/product/product_details',
-                        'key' => 'product',
-                        'data' => $product
-                    ]
-                ]
-            ]
-        ]);
-        
-    }
-
-    
-}
diff --git a/public/app/controllers/Resolve.php b/public/app/controllers/Resolve.php
deleted file mode 100644
index 7b9222c..0000000
--- a/public/app/controllers/Resolve.php
+++ /dev/null
@@ -1,91 +0,0 @@
-<?php
-
-namespace app\controllers;
-
-use \Benchmark;
-
-/** Resolve class
- * will resolve ambiguous utl-request patterns
- * ---
- * Then it can route the request to some controller;
- * Alternatively it can proccess the request via Models
- * and initiate the View engine
- */
-class Resolve {
-
-    public static function url($array)
-    {
-        $fullUrl = implode('/', $array);
-        $url = $array[count($array) - 1];
-
-        
-        if (!PRODUCTION)   Benchmark::add_spot('proxy-page');
-
-        // proxying check if page with this url
-        $page = proxy(
-            [\app\models\cms\Page_model::class, 'fromUrl'],
-            [ $fullUrl ], CACHE_ROOT_TTL,
-            PROXY_CACHE_ERRORS
-        );
-        // if page exist, construct page
-        if ($page !== false) {
-            // page exists, render page
-            load_template('base', [ 'page' => [
-                    'title' => $page['Title'],
-                    'seo'   => [],
-                    'sections' => [
-                        [
-                            'view' => 'content/static',
-                            'key'  => 'page',
-                            'data' => $page
-                        ]
-                    ]
-                ]
-            ]);
-            return ;
-        }
-
-
-        if (!PRODUCTION)   Benchmark::add_spot('proxy-category');
-
-        // proxying check if products category with this url
-        $category = proxy(
-            [\app\models\market\ProductCategories_model::class, 'categoryFromUrl'],
-            [ $fullUrl ], CACHE_CATEGORY_TTL
-        );
-        // if category exist, construct category
-        if ($category !== false) {
-            // render page
-            load_template('products', [ 'data' => [
-                    'title' => $category['Title'],
-                    'seo'   => [],
-                    'tree'  => proxy(
-                        [\app\models\market\ProductCategories_model::class, 'tree'],
-                        [], CACHE_ROOT_TTL
-                    ),
-                    'hierarchyPath' => explode('.', substr($category['Hierarchy'], 1, -1)),
-                    'sections' => [
-                        [
-                            'view' => 'content/product_list/Product_List_Filters',
-                            'key' => 'filters',
-                            'data' => $category
-                        ],
-                        [
-                            'view' => 'content/product_list/product_list',
-                            'key' => 'products',
-                            'data' => $category['products']
-                        ]
-                    ]
-                ]
-            ]);
-            return ;
-        }
-
-        
-        // not page nor category?: reply 404
-        header("HTTP/1.0 404 Not Found");
-        render_view('error/404', ['message' => 'Say something I\'m givin\' up on you.']);
-
-    }
-        
-}
\ No newline at end of file
diff --git a/public/app/controllers/admin/Course_admin.php b/public/app/controllers/admin/Course_admin.php
index bb4deb0..c2e06f2 100644
--- a/public/app/controllers/admin/Course_admin.php
+++ b/public/app/controllers/admin/Course_admin.php
@@ -5,6 +5,7 @@ namespace app\controllers\admin;
 use Registry;
 use Render;
 use app\models\cms\Course_model;
+use app\extends\Cache_service;
 
 class Course_admin {
 
@@ -22,15 +23,7 @@ class Course_admin {
      */
     public static function breadcrumbs()
     {
-        $tree = proxy(                  // cache-get categories
-            [\app\models\cms\Course_model::class, 'category_tree'],
-            [], CACHE_ROOT_TTL
-        );
-        $breadcrumbs = proxy(           // cache-get breadcrumbs
-            [\app\models\cms\Course_model::class, 'breadcrumbs'],
-            [$tree], CACHE_ROOT_TTL
-        );
-        Render::json($breadcrumbs);     // send as json
+        Render::json( Cache_service::courses_struct()['breadcrumbs'] );
     }
 
     /** add course
@@ -75,26 +68,15 @@ class Course_admin {
 
     /** update courses cache
      * --- -- -- - - -
+     * Forces re-caching of courses tree
      * Shall run if anything changes to courses
      * 
      * @param void
-     * @return (array): the two course caches
+     * @return (array): ['tree' => ..., 'breadcrumbs' => ... ]
      */
     public static function update_courses_cache()
     {
-        $tree = proxy(                  // cache-get categories
-            [\app\models\cms\Course_model::class, 'category_tree'],
-            [], CACHE_ROOT_TTL, PROXY_IGNORE_CACHE
-        );
-        $breadcrumbs = proxy(           // cache-get breadcrumbs
-            [\app\models\cms\Course_model::class, 'breadcrumbs'],
-            [$tree], CACHE_ROOT_TTL, PROXY_IGNORE_CACHE
-        );
-
-        return [
-            'tree' => $tree,
-            'breadcrumbs' => $breadcrumbs
-        ];
+        return Cache_service::courses_struct(PROXY_IGNORE_CACHE);
     }
 
 
@@ -289,10 +271,7 @@ class Course_admin {
      */
     public static function files()
     {
-        return  proxy(                  // cache-get files
-            [\app\models\cms\Course_model::class, 'files'],
-            [], CACHE_ROOT_TTL
-        );
+        return  Cache_service::files_attributes();
     }
 
 
diff --git a/public/app/controllers/cms/Course.php b/public/app/controllers/cms/Course.php
index b671a5f..7e53d3a 100644
--- a/public/app/controllers/cms/Course.php
+++ b/public/app/controllers/cms/Course.php
@@ -6,9 +6,45 @@ use Registry;
 use Render;
 use app\controllers\Auth;
 use app\models\cms\Course_model;
+use app\extends\Cache_service;
 
 class Course {
 
+
+    /** PERMITION
+     * -------------------------------------------------------------------------
+     */
+
+
+    /** is admin or permited
+     * 
+     * shortcut method for checking access authorization
+     * 
+     * returns true if user belogns to the admin group
+     * or has the specified permition/privilege
+     * 
+     * @param $privilege_id (int)
+     * 
+     * NOTE:
+     * unlike the other authorization methods ...
+     * $privilege_id is NOT an array but a single privilege id
+     * 
+     * @return true|false
+     */
+    private static function is_admin_or_permited( $privilege_id)
+    {
+        return (
+            Auth::in_admin_group()
+            || Auth::has_Permition([ $privilege_id ])
+        );
+    }
+
+
+
+    /** FILES
+     * -------------------------------------------------------------------------
+     */
+
     /** serve file by file_path
      * (request is valid only for admin users)
      * 
@@ -17,8 +53,10 @@ class Course {
      */
     public static function serve_file($file_path)
     {
-        // check privileges
-        if (Auth::is_admin()) {     // TODO: -OR- has prvivilege
+        $file = self::get_file_attributes($file_path);
+
+        // if user is authorized
+        if (is_admin_or_permited($file['privilege_id'])) {
 
             $media_type = Registry::get('REQUEST')->GET['type'];    // get media-type
             $real_path = MEDIA_STORAGE_ROOT . $file_path;           // construct real path
@@ -33,4 +71,78 @@ class Course {
         }
     }
 
+
+    /** get_file_attributes
+     * 
+     * returns attributes of a file
+     * (medias are proxied for speed optimization)
+     * 
+     * @param $path (string) : file path
+     * @return $file attributes --or-- false
+     */
+    private static function get_file_attributes($path)
+    {
+        $medias = Cache_service::files_attributes();
+
+        foreach($medias as $key => $medi) {
+            if ($medi['path'] == $path) {
+                return $medi;
+            }
+        }
+
+        return false;
+    }
+
+
+
+    /** COURSES
+     * -------------------------------------------------------------------------
+     */
+
+
+     public static function course($id)
+     {
+        $cache = Cache_service::courses_struct();
+        $tree = $cache['tree'];
+        $breadcrumbs = $cache['breadcrumbs'];
+        $lessons = Course_model::lessons_of_course(intval($id));
+        $id = intval($id);
+
+        // print_r($breadcrumbs); die();
+
+        // find parent_ids of current category (to open the menu tree)
+        $course_path = [];
+        foreach($breadcrumbs[$id]['parents'] as $key => $parent) {
+            $course_path[] = intval($parent['id']);
+        }
+        $course_path[] = intval($id);
+
+        Render::view('templates/course', [
+            'id' => $id,
+            'title' => $breadcrumbs[ $id ]['rec']['label'],
+            'categories' => $tree,
+            'breadcrumbs' => $breadcrumbs,
+            'lessons' => $lessons,
+            'course_path' => $course_path
+        ]);
+     }
+
+
+
+
+
+
+     /** LESSONS
+      * ------------------------------------------------------------------------
+      */
+
+
+
+
+
+
+    
+
+
+
 }
\ No newline at end of file
diff --git a/public/app/extends/Cache_service.php b/public/app/extends/Cache_service.php
new file mode 100644
index 0000000..e44cc8e
--- /dev/null
+++ b/public/app/extends/Cache_service.php
@@ -0,0 +1,45 @@
+<?php 
+namespace app\extends;
+
+use app\models\cms\Course_model;
+use app\models\admin\Privilege_model;
+
+/** Cache service
+ * -----------------------------------------------------------------------------
+ * 
+ * class that gathers common source-expensive queries
+ * and helps for performance optimization
+ * 
+ */
+class Cache_service
+{
+
+    public static function courses_struct( $options = 0 )
+    {
+        return proxy(                  // cache-get categories
+            [\app\models\cms\Course_model::class, 'courses_struct'],
+            [], CACHE_ROOT_TTL, $options
+        );
+    }
+
+    public static function files_attributes( $options = 0 )
+    {
+        return  proxy(
+            [\app\models\cms\Course_model::class, 'files'],
+            [], CACHE_ROOT_TTL, $options
+        );
+    }
+
+
+    public static function privileges_hierarchy( $options = 0 )
+    {
+        return proxy(
+            [\app\models\admin\Privilege_model::class, 'privileges'],
+            [], CACHE_ROOT_TTL, $options
+        );
+    }
+
+
+
+
+}
\ No newline at end of file
diff --git a/public/app/models/cms/Course_model.php b/public/app/models/cms/Course_model.php
index 3d0ac1c..d8a8a0e 100644
--- a/public/app/models/cms/Course_model.php
+++ b/public/app/models/cms/Course_model.php
@@ -6,6 +6,10 @@ use \Registry;
 
 class Course_model {
     
+    /** COURSES
+     * -------------------------------------------------------------------------
+     */
+
 	/** get all categories
      * 
      * raw table data (simplest SELECT)
@@ -19,6 +23,21 @@ class Course_model {
         );
 	}
 
+    /** courses struct
+     * 
+     * a super array with almost any info needed about courses
+     * 
+     * @return (array) ['tree' => ..., 'breadcrumbs' => ... ]
+     */
+    public static function courses_struct()
+    {
+        $tree = self::category_tree();
+        return [
+            'tree' => $tree,
+            'breadcrumbs' => self::breadcrumbs($tree)
+        ];
+    }
+
 
     /** constuct a category_tree
      * 
@@ -216,6 +235,32 @@ class Course_model {
     }
 
 
+
+
+    /** LESSONS
+     * -------------------------------------------------------------------------
+     */
+    
+
+    /** lessons of course
+     * 
+     * @param $course_id
+     */
+
+    public static function lessons_of_course($id)
+    {
+        // TODO: order results in some way
+
+        return Registry::use('database')->runQuery(
+            "SELECT lesson.*, lesson_privilege.privilege_id FROM lesson
+            LEFT JOIN lesson_privilege ON lesson_privilege.lesson_id = lesson.id
+            WHERE lesson.status = 1 AND lesson.course_id = :id",
+            [':id' => $id]
+        );
+    }
+
+
+
     /** files
      * return all files
      * @param void
diff --git a/public/app/routes/backend.php b/public/app/routes/backend.php
index 5d6189d..475f52b 100644
--- a/public/app/routes/backend.php
+++ b/public/app/routes/backend.php
@@ -3,7 +3,7 @@
 use app\controllers\Auth;
 use app\controllers\admin\Course_admin;
 use app\models\admin\Privilege_model;
-
+use app\extends\Cache_service;
 
 // admin panel
 // ---
@@ -91,10 +91,7 @@ Route::add('/admin/privileges', function () {
 // ---
 Route::add('/admin/api/privileges', function () {
     Auth::allowRoles([1, 2, 3]);    // allow few admin-panel roles
-    Render::json( proxy(
-        [\app\models\admin\Privilege_model::class, 'privileges'],
-        [], CACHE_ROOT_TTL
-    ));
+    Render::json( Cache_service::privileges_hierarchy() );
 });
 
 // add privilege
diff --git a/public/app/routes/frontend.php b/public/app/routes/frontend.php
index 898b23a..f9e74db 100644
--- a/public/app/routes/frontend.php
+++ b/public/app/routes/frontend.php
@@ -4,15 +4,13 @@ use app\controllers\Auth;
 use app\controllers\Classroom_user;
 use app\controllers\cms\Course;
 use app\models\cms\Course_model;
+use app\extends\Cache_service;
 
 // Home/Welcome
 // ---
 Route::add('/',         function() { // echo 'Welcome!'; });
     Render::view('welcome', [   // cache categories (while retrieving)
-        'categories' => proxy(
-            [\app\models\cms\Course_model::class, 'category_tree'],
-            [], CACHE_ROOT_TTL
-        )
+        'categories' => Cache_service::courses_struct()['tree']
     ]);
     // header('Location: /some/default/url', true, 302);
 });
@@ -46,8 +44,8 @@ Route::notFound(        function() {
 
 // Resolve urls
 // --- -- -- - - -
-Route::add('/course/([0-9a-zA-Z-_]*)',
-    function($label) { Course::show([$label]); }
+Route::add('/course/([0-9]*)',
+    function($id) { Course::course($id); }
 );
 
 Route::add('/lesson/([0-9a-f]*)/([0-9a-zA-Z-_]*)',
diff --git a/public/app/views/components/breadcrumbs.php b/public/app/views/components/breadcrumbs.php
index 471cfb6..90b4af9 100644
--- a/public/app/views/components/breadcrumbs.php
+++ b/public/app/views/components/breadcrumbs.php
@@ -5,7 +5,7 @@
  * imported variables
  * ---
  * @param $id : category_id of last level
- * @param $title : category title of last level
+ * @param $label : category title of last level
  * @param $parents : array of parent nodes
  * -----------------------------------------------------------------------------
  */
@@ -18,13 +18,13 @@
     <!-- parent nodes -->
     <?php if ($id != 0) : ?>
         <?php foreach($parents as $node) : ?>
-            <i class="fas fa-angle-right"></i> <a href="/wiki/category?id=<?=$node['id']?>"><?=$node['title']?></a>
+            <i class="fas fa-angle-right"></i> <a href="/course/<?=$node['id']?>"><?=$node['label']?></a>
         <?php endforeach; ?>
     <?php endif; ?>
 
     <!-- last (current) node -->
     <?php if ($id != 0) : ?>
-        <i class="fas fa-angle-right"></i> <a href="/wiki/category?id=<?=$id?>"><?=$title?></a>
+        <i class="fas fa-angle-right"></i> <a href="/course/<?=$id?>"><?=$label?></a>
     <?php endif; ?>
     
 </div>
\ No newline at end of file
diff --git a/public/app/views/components/lessons_list.php b/public/app/views/components/lessons_list.php
new file mode 100644
index 0000000..1c59164
--- /dev/null
+++ b/public/app/views/components/lessons_list.php
@@ -0,0 +1,51 @@
+<?php 
+/** lessons list
+ * -----------------------------------------------------------------------------
+ * 
+ * imported variables:
+ * ---
+ * @param $lessons : array of lessons
+ * @param $fieldset : array of optional fields to show [category, intro, date]
+ * 
+ * example call:
+ * ---
+ * Render::template("sections/articles_list.php",[
+ *      'articles' => $category_tree,
+ *      'fieldset' => ['date', 'intro']
+ * ])
+ * -----------------------------------------------------------------------------
+ */
+?>
+<div class="row">
+
+    <?php foreach($lessons as $post) : ?>
+
+        <!-- <div class="col-xl-4 col-lg-6"> -->
+            <div class="post-card">
+
+                <?php if (in_array('date', $fieldset)) : ?>
+                    <?=$post['date']?>
+                <?php endif; ?>
+
+                <div class="post-card--content">
+
+                    <h3>
+                        <a href="/lesson/<?=$post['id']?>"><?=$post['title']?></a>
+                    </h3>
+
+                    <?php if (in_array('category', $fieldset)) : ?>
+                        <p class="category"><?=$post['course_id']?></p>
+                    <?php endif; ?>
+
+                    <?php if (in_array('intro', $fieldset) && $post['intro']) : ?>
+                        <p class="intro"><?=$post['intro']?></p>
+                    <?php endif; ?>
+
+                </div>
+
+            </div>               
+        <!-- </div> -->
+
+    <?php endforeach; ?>
+
+</div>
\ No newline at end of file
diff --git a/public/app/views/components/subcategories.php b/public/app/views/components/subcategories.php
new file mode 100644
index 0000000..58f53fa
--- /dev/null
+++ b/public/app/views/components/subcategories.php
@@ -0,0 +1,18 @@
+<!-- Sub-Categories -->
+
+<?php if ($breadcrumbs[ $id ]['childs'] != []) : ?>
+
+    <h5>Υποκατηγορίες</h5>
+    <div class="category-childs">
+
+    <?php foreach($breadcrumbs[ $id ]['childs'] as $key => $child) : ?>
+        
+        <a href="/course/<?=$child['id']?>" class="btn btn-light">
+            <?=$child['label']?>
+        </a>
+
+    <?php endforeach; ?>
+
+    </div>
+
+<?php endif; ?>
\ No newline at end of file
diff --git a/public/app/views/components/top_bar.php b/public/app/views/components/top_bar.php
index ed96e35..0e6e437 100644
--- a/public/app/views/components/top_bar.php
+++ b/public/app/views/components/top_bar.php
@@ -3,9 +3,9 @@
     <?php    // breadcrumbs
         ////////////////////////////////////////////////////////////////////////
         Render::template("components/breadcrumbs", [
-            'id' => 0,
-            'title' => '',
-            'parents' => []
+            'id' => $id,
+            'label' => $label,
+            'parents' => $parents
         ]);
     ?>
 
diff --git a/public/app/views/templates/course.php b/public/app/views/templates/course.php
new file mode 100644
index 0000000..9d42297
--- /dev/null
+++ b/public/app/views/templates/course.php
@@ -0,0 +1,82 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+    <title><?=SITE_TITLE?> - <?=$title?></title>
+
+    <?php   // header includes
+        ////////////////////////////////////////////////////////////////////////
+        Render::view('components/header_includes');
+    ?>
+
+</head>
+<body class="classroom">
+
+    <?php        // top-bar
+        ////////////////////////////////////////////////////////////////////////
+        Render::view('components/top_bar', [
+            'id' => $id,
+            'label' => $breadcrumbs[ $id ]['rec']['label'],
+            'parents' => $breadcrumbs[ $id ]['parents']
+        ]);
+    ?>
+
+
+<div class="main-content container">
+        <div class="row">
+
+            <div class="col col-md-5 col-lg-4 d-sm-none d-md-block side-bar">
+
+                <?php    // tree of courses
+                    ////////////////////////////////////////////////////////////////////////
+                    Render::view('components/courses_menu', [
+                        'categories' => $categories,
+                        'open_path' => $course_path
+                    ]);
+                ?>
+
+            </div>
+
+            <div class="col col-sm-12 col-md-7 col-lg-8 course-view">
+
+                <!-- Category Title -->
+                <h3>
+                    <?=$breadcrumbs[ $id ]['rec']['label']?>
+                </h3>
+
+
+                <!-- Sub-Categories -->
+                <?php 
+                    Render::view('components/subcategories',[
+                        'id' => $id,
+                        'breadcrumbs' => $breadcrumbs
+                    ])
+                ?>
+
+
+                <!-- Articles List -->
+                <?php if ($lessons) : ?>
+
+                    <h5>Μαθήματα</h5>
+
+                    <?php    // list of posts/articles
+                        ////////////////////////////////////////////////////
+                        Render::view("components/lessons_list", [
+                            'lessons' => $lessons,
+                            'fieldset' => ['intro'] // ['intro', 'date']
+                        ]);
+                    ?>
+                <?php endif; ?>
+
+
+
+
+            </div>
+
+        </div>
+    </div>
+
+
+    <script src="/assets/js/classroom.js"></script>
+</body>
+</html>