MDL-71912 mod_book: Update book to implement the action menu.

Co-authored-by: Sujith Haridasan <sujith@moodle.com>

mod/book/classes/output/main_action_menu.php

+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Output the action menu for this activity.
+ *
+ * @package   mod_book
+ * @copyright 2021 Adrian Greeve <adrian@moodle.com>
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace mod_book\output;
+
+use templatable;
+use renderable;
+use moodle_url;
+use stdClass;
+
+/**
+ * Output the action menu for the book activity.
+ *
+ * @package   mod_book
+ * @copyright 2021 Adrian Greeve <adrian@moodle.com>
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class main_action_menu implements templatable, renderable {
+
+    /** @var int The course module ID. */
+    protected $cmid;
+    /** @var stdClass[] Chapters of the book. */
+    protected $chapters;
+    /** @var stdClass Current chapter of the book. */
+    protected $chapter;
+
+    /**
+     * Constructor for this class.
+     *
+     * @param int      $cmid     The course module ID.
+     * @param array    $chapters Chapters of this book.
+     * @param stdClass $chapter  The current chapter.
+     */
+    public function __construct(int $cmid, array $chapters, stdClass $chapter) {
+        $this->cmid = $cmid;
+        $this->chapters = $chapters;
+        $this->chapter = $chapter;
+    }
+
+    /**
+     * Get the next chapter in the book.
+     *
+     * @return ?stdClass The next chapter of the book.
+     */
+    protected function get_next_chapter(): ?stdClass {
+        $nextpageid = $this->chapter->pagenum + 1;
+        // Early return if the current chapter is also the last chapter.
+        if ($nextpageid > count($this->chapters)) {
+            return null;
+        }
+        while ((!$nextchapter = $this->get_chapter($nextpageid))) {
+            // Break the loop if this is the last chapter.
+            if ($nextpageid === count($this->chapters)) {
+                break;
+            }
+            $nextpageid++;
+        }
+        return $nextchapter;
+    }
+
+    /**
+     * Get the previous chapter in the book.
+     *
+     * @return ?stdClass The previous chapter of the book.
+     */
+    protected function get_previous_chapter(): ?stdClass {
+        $prevpageid = $this->chapter->pagenum - 1;
+        // Early return if the current chapter is also the first chapter.
+        if ($prevpageid < 1) {
+            return null;
+        }
+        while ((!$prevchapter = $this->get_chapter($prevpageid))) {
+            // Break the loop if this is the first chapter.
+            if ($prevpageid === 1) {
+                break;
+            }
+            $prevpageid--;
+        }
+        return $prevchapter;
+    }
+
+    /**
+     * Get the specific chapter of the book.
+     *
+     * @param int $id The chapter id to retrieve.
+     * @return ?stdClass The requested chapter.
+     */
+    protected function get_chapter(int $id): ?stdClass {
+        $context = \context_module::instance($this->cmid);
+        $viewhidden = has_capability('mod/book:viewhiddenchapters', $context);
+
+        foreach ($this->chapters as $chapter) {
+            // Also make sure that the chapter is not hidden or the user can view hidden chapters before returning
+            // the chapter object.
+            if (($chapter->pagenum == $id) && (!$chapter->hidden || $viewhidden)) {
+                return $chapter;
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Exports the navigation buttons around the book.
+     *
+     * @param \renderer_base $output renderer base output.
+     * @return array Data to render.
+     */
+    public function export_for_template(\renderer_base $output): array {
+        $next = $this->get_next_chapter();
+        $previous = $this->get_previous_chapter();
+
+        $context = \context_module::instance($this->cmid);
+        $data = [];
+
+        if ($next) {
+            $nextdata = [
+                'title' => get_string('navnext', 'mod_book'),
+                'url' => (new moodle_url('/mod/book/view.php', ['id' => $this->cmid, 'chapterid' => $next->id]))->out(false)
+            ];
+            $data['next'] = $nextdata;
+        }
+        if ($previous) {
+            $previousdata = [
+                'title' => get_string('navprev', 'mod_book'),
+                'url' => (new moodle_url('/mod/book/view.php', ['id' => $this->cmid, 'chapterid' => $previous->id]))->out(false)
+            ];
+            $data['previous'] = $previousdata;
+        }
+
+        return $data;
+    }
+}

mod/book/classes/output/renderer.php

+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Moodle renderer used to display special elements of the book module
+ *
+ * @package mod_book
+ * @copyright  2021 Adrian Greeve <adrian@moodle.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace mod_book\output;
+
+/**
+ * Moodle renderer used to display special elements of the book module
+ *
+ * @package mod_book
+ * @copyright  2021 Adrian Greeve <adrian@moodle.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class renderer extends \plugin_renderer_base {
+
+    /**
+     * Renderers the main action menu.
+     *
+     * @param main_action_menu $actionmenu Main action menu object.
+     * @return string The rendered html.
+     */
+    public function render_main_action_menu(main_action_menu $actionmenu): string {
+        $context = $actionmenu->export_for_template($this);
+        return $this->render_from_template('mod_book/main_action_menu', $context);
+    }
+}

mod/book/lib.php

@@ -43,9 +43,12 @@ function book_get_numbering_types() {
 
 /**
  * Returns list of available navigation link types.
+ *
+ * @deprecated since Moodle 4.0. MDL-72376.
  * @return array
  */
 function book_get_nav_types() {
+    debugging("book_get_nav_types() is deprecated. There is no replacement. Navigation is now only next and previous.");
     require_once(__DIR__.'/locallib.php');
 
     return array (
@@ -332,25 +335,6 @@ function book_extend_settings_navigation(settings_navigation $settingsnav, navig
         $firstkey = null;
     }
 
-    $params = $PAGE->url->params();
-
-    if ($PAGE->cm->modname === 'book' and !empty($params['id']) and !empty($params['chapterid'])
-            and has_capability('mod/book:edit', $PAGE->cm->context)) {
-        if (!empty($USER->editing)) {
-            $string = get_string("turneditingoff");
-            $edit = '0';
-        } else {
-            $string = get_string("turneditingon");
-            $edit = '1';
-        }
-        $url = new moodle_url('/mod/book/view.php', array('id'=>$params['id'], 'chapterid'=>$params['chapterid'], 'edit'=>$edit, 'sesskey'=>sesskey()));
-        $editnode = navigation_node::create($string, $url, navigation_node::TYPE_SETTING);
-        $booknode->add_node($editnode, $firstkey);
-        if (!$PAGE->theme->haseditswitch) {
-            $PAGE->set_button($OUTPUT->single_button($url, $string));
-        }
-    }
-
     $plugins = core_component::get_plugin_list('booktool');
     foreach ($plugins as $plugin => $dir) {
         if (file_exists("$dir/lib.php")) {

mod/book/mod_form.php

@@ -70,25 +70,7 @@ class mod_book_mod_form extends moodleform_mod {
         $mform->addHelpButton('numbering', 'numbering', 'mod_book');
         $mform->setDefault('numbering', $config->numbering);
 
-        $alloptions = book_get_nav_types();
-        $allowed = explode(',', $config->navoptions);
-        $options = array();
-        foreach ($allowed as $type) {
-            if (isset($alloptions[$type])) {
-                $options[$type] = $alloptions[$type];
-            }
-        }
-        if ($this->current->instance) {
-            if (!isset($options[$this->current->navstyle])) {
-                if (isset($alloptions[$this->current->navstyle])) {
-                    $options[$this->current->navstyle] = $alloptions[$this->current->navstyle];
-                }
-            }
-        }
-        $mform->addElement('select', 'navstyle', get_string('navstyle', 'book'), $options);
-        $mform->addHelpButton('navstyle', 'navstyle', 'mod_book');
-        $mform->setDefault('navstyle', $config->navstyle);
-
+        $mform->addElement('static', 'customtitlestext', get_string('customtitles', 'mod_book'));
         $mform->addElement('checkbox', 'customtitles', get_string('customtitles', 'book'));
         $mform->addHelpButton('customtitles', 'customtitles', 'mod_book');
         $mform->setDefault('customtitles', 0);

mod/book/settings.php

@@ -35,11 +35,6 @@ if ($ADMIN->fulltree) {
         get_string('numberingoptions', 'mod_book'), get_string('numberingoptions_desc', 'mod_book'),
         array_keys($options), $options));
 
-    $navoptions = book_get_nav_types();
-    $settings->add(new admin_setting_configmultiselect('book/navoptions',
-        get_string('navoptions', 'mod_book'), get_string('navoptions_desc', 'mod_book'),
-        array_keys($navoptions), $navoptions));
-
     // Modedit defaults.
 
     $settings->add(new admin_setting_heading('bookmodeditdefaults',
@@ -48,7 +43,4 @@ if ($ADMIN->fulltree) {
     $settings->add(new admin_setting_configselect('book/numbering',
         get_string('numbering', 'mod_book'), '', BOOK_NUM_NUMBERS, $options));
 
-    $settings->add(new admin_setting_configselect('book/navstyle',
-        get_string('navstyle', 'mod_book'), '', BOOK_LINK_IMAGE, $navoptions));
-
 }

mod/book/templates/main_action_menu.mustache

+{{!
+    This file is part of Moodle - http://moodle.org/
+
+    Moodle is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Moodle is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+}}
+{{!
+    @template mod_book/main_action_menu
+
+    Previous and next buttons for the book.
+
+    Classes required for JS:
+    * none
+
+    Context variables required for this template:
+    * see mod/book/classes/output/main_actionbar.php
+
+    Example context (json):
+    {
+        "previous": {
+            "url": "https://moodle.org",
+            "title": "Chapter 1: First of many"
+        },
+        "next": {
+            "url": "https://moodle.org",
+            "title": "Chapter 3: Last of many"
+        }
+    }
+
+}}
+<div class="container-fluid">
+    <div class="row">
+        <div class="col-xs-6">
+            {{#previous}}
+                <a class="btn btn-secondary mr-1" href="{{url}}">{{title}}</a>
+            {{/previous}}
+        </div>
+        <div class="col-xs-6">
+            {{#next}}
+                <a class="btn btn-secondary" href="{{url}}">{{title}}</a>
+            {{/next}}
+        </div>
+    </div>
+</div>

mod/book/tests/behat/create_chapters.feature

@@ -49,7 +49,7 @@ Feature: In a book, create chapters and sub chapters
     And I should see "2. Dummy second chapter" in the ".book_content" "css_element"
     And I should see "2. Dummy second chapter" in the "strong" "css_element"
     And I should not see "Next" in the ".book_content" "css_element"
-    And I click on "Exit book" "link"
+    And I am on "Course 1" course homepage
     And I should see "Test book" in the "Topic 1" "section"
     And I click on "Test book" "link" in the "Topic 1" "section"
     And I should not see "Previous" in the ".book_content" "css_element"

mod/book/tests/behat/edit_navigation_options.feature

@@ -16,6 +16,7 @@ Feature: In a book, change the navigation options
       | teacher1 | C1 | editingteacher |
     And I log in as "teacher1"
 
+  # The option to "Style of navigation" is removed from the settings.
   Scenario: Change navigation options
     Given the following "activities" exist:
       | activity | name      | intro                    | course | idnumber | section | navstyle |
@@ -37,18 +38,6 @@ Feature: In a book, change the navigation options
     And I should see "Test book"
     And I should see "2. Test chapter 2"
     And I click on "1. Test chapter 1" "link" in the "Table of contents" "block"
-    And "Next" "link" should not exist
-    And I click on "2. Test chapter 2" "link" in the "Table of contents" "block"
-    And "Previous" "link" should not exist
-    And I navigate to "Settings" in current page administration
-    And I set the field "Style of navigation" to "Images"
-    And I press "Save and display"
-    And "Next:" "icon" should exist
-    And I click on "2. Test chapter 2" "link" in the "Table of contents" "block"
-    And "Previous:" "icon" should exist
-    When I navigate to "Settings" in current page administration
-    And I set the field "Style of navigation" to "Text"
-    And I press "Save and display"
-    Then "Next" "link" should exist
+    And "Next" "link" should exist
     And I click on "2. Test chapter 2" "link" in the "Table of contents" "block"
     And "Previous" "link" should exist

mod/book/tests/behat/log_entries.feature

@@ -33,7 +33,7 @@ Feature: In a book, verify log entries
     And I click on "Next" "link"
     And I click on "Previous" "link"
     And I navigate to "Print book" in current page administration
-    And I navigate to "Download" in current page administration
+    And I navigate to "Download IMS CP" in current page administration
     And I navigate to "Logs" in current page administration
     Then I should see "Book exported"
     And I should see "Book printed"

mod/book/tests/behat/show_hide_chapters.feature

@@ -25,7 +25,9 @@ Feature: Book activity chapter visibility management
       | Chapter title | First chapter |
       | Content | First chapter |
     And I press "Save changes"
+    And I am on "Course 1" course homepage
     And I turn editing mode on
+    And I click on "Test book" "link" in the "region-main" "region"
     And I click on "Add new chapter after \"First chapter\"" "link"
     And I set the following fields to these values:
       | Chapter title | Second chapter |
@@ -54,26 +56,25 @@ Feature: Book activity chapter visibility management
     When I follow "Hide chapter \"2. Second chapter\""
     And I follow "Hide chapter \"2. Third chapter\""
     And I am on the "Test book" "book activity" page
+    And I am on "Course 1" course homepage
     And I turn editing mode off
+    And I click on "Test book" "link" in the "region-main" "region"
     Then the "class" attribute of "a[title='Second chapter']" "css_element" should contain "dimmed_text"
     And the "class" attribute of "a[title='Third chapter']" "css_element" should contain "dimmed_text"
+    And I am on "Course 1" course homepage
     And I turn editing mode on
+    And I click on "Test book" "link" in the "region-main" "region"
     And I follow "Next"
     And I should see "Second chapter" in the ".book_content" "css_element"
-    And I should not see "Exit book"
     And I follow "Next"
     And I should see "Sub chapter" in the ".book_content" "css_element"
     And I follow "Next"
     And I should see "Third chapter" in the ".book_content" "css_element"
     And I follow "Next"
     And I should see "Fourth chapter" in the ".book_content" "css_element"
-    And I follow "Exit book"
     And I log out
     And I am on the "Test book" "book activity" page logged in as student1
     And I should not see "Second chapter" in the "Table of contents" "block"
     And I should not see "Third chapter" in the "Table of contents" "block"
     And I follow "Next"
     And I should see "Fourth chapter" in the ".book_content" "css_element"
-    And I follow "Exit book"
-    And I am on the "Test book" "book activity" page
-    And I should see "First chapter" in the ".book_content" "css_element"

mod/book/tool/exportimscp/lang/en/booktool_exportimscp.php

@@ -26,9 +26,7 @@ defined('MOODLE_INTERNAL') || die;
 
 $string['eventbookexported'] = 'Book exported';
 $string['exportimscp:export'] = 'Export book as IMS content package';
+$string['generateimscp'] = 'Download IMS CP';
 $string['nochapters'] = 'No book chapters found, so unable to export to IMS CP.';
 $string['pluginname'] = 'Book IMS CP export';
 $string['privacy:metadata'] = 'The Book IMS CP export plugin does not store any personal data.';
-
-// Deprecated since Moodle 4.0.
-$string['generateimscp'] = 'Generate IMS CP';

mod/book/tool/exportimscp/lang/en/deprecated.txt

-generateimscp,booktool_exportimscp
\ No newline at end of file

mod/book/tool/exportimscp/lib.php

@@ -36,6 +36,8 @@ function booktool_exportimscp_extend_settings_navigation(settings_navigation $se
     if (has_capability('booktool/exportimscp:export', $PAGE->cm->context)) {
         $url = new moodle_url('/mod/book/tool/exportimscp/index.php', array('id'=>$PAGE->cm->id));
         $icon = new pix_icon('generate', '', 'booktool_exportimscp', array('class'=>'icon'));
-        $node->add(get_string('download'), $url, navigation_node::TYPE_SETTING, null, null, $icon);
+        $umscpnode = $node->add(get_string('generateimscp', 'booktool_exportimscp'), $url,
+            navigation_node::TYPE_SETTING, null, null, $icon);
+        $umscpnode->set_force_into_more_menu(true);
     }
 }

mod/book/tool/importhtml/index.php

@@ -38,7 +38,7 @@ require_login($course, false, $cm);
 $context = context_module::instance($cm->id);
 require_capability('booktool/importhtml:import', $context);
 
-$PAGE->set_url('/mod/book/tool/importhtml/index.php', array('id'=>$id, 'chapterid'=>$chapterid));
+$PAGE->set_url('/mod/book/tool/importhtml/index.php', array('id' => $id));
 
 if ($chapterid) {
     if (!$chapter = $DB->get_record('book_chapters', array('id'=>$chapterid, 'bookid'=>$book->id))) {

mod/book/tool/importhtml/lib.php

@@ -35,6 +35,6 @@ function booktool_importhtml_extend_settings_navigation(settings_navigation $set
 
     if (has_capability('booktool/importhtml:import', $PAGE->cm->context)) {
         $url = new moodle_url('/mod/book/tool/importhtml/index.php', array('id'=>$PAGE->cm->id));
-        $node->add(get_string('import', 'booktool_importhtml'), $url, navigation_node::TYPE_SETTING, null, null, null);
+        $node->add(get_string('import', 'booktool_importhtml'), $url, navigation_node::TYPE_SETTING, null, 'importchapter', null);
     }
 }

mod/book/tool/print/lib.php

@@ -42,11 +42,13 @@ function booktool_print_extend_settings_navigation(settings_navigation $settings
         $url1 = new moodle_url('/mod/book/tool/print/index.php', array('id'=>$params['id']));
         $url2 = new moodle_url('/mod/book/tool/print/index.php', array('id'=>$params['id'], 'chapterid'=>$params['chapterid']));
         $action = new action_link($url1, get_string('printbook', 'booktool_print'), new popup_action('click', $url1));
-        $node->add(get_string('printbook', 'booktool_print'), $action, navigation_node::TYPE_SETTING, null, null,
-                new pix_icon('book', '', 'booktool_print', array('class'=>'icon')));
+        $booknode = $node->add(get_string('printbook', 'booktool_print'), $action, navigation_node::TYPE_SETTING, null, 'printbook',
+                new pix_icon('book', '', 'booktool_print', array('class' => 'icon')));
+        $booknode->set_force_into_more_menu(true);
         $action = new action_link($url2, get_string('printchapter', 'booktool_print'), new popup_action('click', $url2));
-        $node->add(get_string('printchapter', 'booktool_print'), $action, navigation_node::TYPE_SETTING, null, null,
-                new pix_icon('chapter', '', 'booktool_print', array('class'=>'icon')));
+        $chapternode = $node->add(get_string('printchapter', 'booktool_print'), $action, navigation_node::TYPE_SETTING, null,
+            'printchapter', new pix_icon('chapter', '', 'booktool_print', array('class' => 'icon')));
+        $chapternode->set_force_into_more_menu(true);
     }
 }
 

mod/book/upgrade.txt

 This files describes API changes in the book code.
 
+=== 4.0 ===
+
+* book_get_nav_types() has been deprecated. Related settings have been removed. The navigation is now set to only "next" and
+ "previous".
+
 === 3.11 ===
 * Final deprecation - booktool_print_get_toc(). Please use render_print_book_toc() instead.
 

mod/book/version.php

@@ -25,6 +25,6 @@
 defined('MOODLE_INTERNAL') || die;
 
 $plugin->component = 'mod_book'; // Full name of the plugin (used for diagnostics)
-$plugin->version   = 2021052501; // The current module version (Date: YYYYMMDDXX).
+$plugin->version   = 2021052504; // The current module version (Date: YYYYMMDDXX).
 $plugin->requires  = 2021052500; // Requires this Moodle version.
 $plugin->cron      = 0;          // Period for cron to check this module (secs)

mod/book/view.php

@@ -123,81 +123,12 @@ $PAGE->set_heading($course->fullname);
 
 book_add_fake_block($chapters, $chapter, $book, $cm, $edit);
 
-// prepare chapter navigation icons
-$previd = null;
-$prevtitle = null;
-$navprevtitle = null;
-$nextid = null;
-$nexttitle = null;
-$navnexttitle = null;
-$last = null;
-foreach ($chapters as $ch) {
-    if (!$edit and ($ch->hidden && !$viewhidden)) {
-        continue;
-    }
-    if ($last == $chapter->id) {
-        $nextid = $ch->id;
-        $nexttitle = book_get_chapter_title($ch->id, $chapters, $book, $context);
-        $navnexttitle = get_string('navnexttitle', 'mod_book', $nexttitle);
-        break;
-    }
-    if ($ch->id != $chapter->id) {
-        $previd = $ch->id;
-        $prevtitle = book_get_chapter_title($ch->id, $chapters, $book, $context);
-        $navprevtitle = get_string('navprevtitle', 'mod_book', $prevtitle);
-    }
-    $last = $ch->id;
-}
-
-if ($book->navstyle) {
-    $navprevicon = right_to_left() ? 'nav_next' : 'nav_prev';
-    $navnexticon = right_to_left() ? 'nav_prev' : 'nav_next';
-
-    $chnavigation = '';
-    if ($previd) {
-        $navprev = get_string('navprev', 'book');
-        if ($book->navstyle == 1) {
-            $chnavigation .= '<a title="' . $navprevtitle . '" class="bookprev" href="view.php?id=' .
-                $cm->id . '&amp;chapterid=' . $previd .  '">' .
-                $OUTPUT->pix_icon($navprevicon, $navprevtitle, 'mod_book') . '</a>';
-        } else {
-            $chnavigation .= '<a title="' . $navprev . '" class="bookprev" href="view.php?id=' .
-                $cm->id . '&amp;chapterid=' . $previd . '">' .
-                '<span class="chaptername"><span class="arrow">' . $OUTPUT->larrow() . '&nbsp;</span></span>' .
-                $navprev . ':&nbsp;<span class="chaptername">' . $prevtitle . '</span></a>';
-        }
-    }
-    if ($nextid) {
-        $navnext = get_string('navnext', 'book');
-        if ($book->navstyle == 1) {
-            $chnavigation .= '<a title="' . $navnexttitle . '" class="booknext" href="view.php?id=' .
-                $cm->id . '&amp;chapterid='.$nextid.'">' .
-                $OUTPUT->pix_icon($navnexticon, $navnexttitle, 'mod_book') . '</a>';
-        } else {
-            $chnavigation .= ' <a title="' . $navnext . '" class="booknext" href="view.php?id=' .
-                $cm->id . '&amp;chapterid='.$nextid.'">' .
-                $navnext . ':<span class="chaptername">&nbsp;' . $nexttitle.
-                '<span class="arrow">&nbsp;' . $OUTPUT->rarrow() . '</span></span></a>';
-        }
-    } else {
-        $navexit = get_string('navexit', 'book');
-        $sec = $DB->get_field('course_sections', 'section', array('id' => $cm->section));
-        $returnurl = course_get_url($course, $sec);
-        if ($book->navstyle == 1) {
-            $chnavigation .= '<a title="' . $navexit . '" class="bookexit"  href="'.$returnurl.'">' .
-                $OUTPUT->pix_icon('nav_exit', $navexit, 'mod_book') . '</a>';
-        } else {
-            $chnavigation .= ' <a title="' . $navexit . '" class="bookexit"  href="'.$returnurl.'">' .
-                '<span class="chaptername">' . $navexit . '&nbsp;' . $OUTPUT->uarrow() . '</span></a>';
-        }
-    }
-}
+$renderer = $PAGE->get_renderer('mod_book');
+$actionmenu = new \mod_book\output\main_action_menu($cm->id, $chapters, $chapter, $book);
+$renderedmenu = $renderer->render($actionmenu);
 
 // We need to discover if this is the last chapter to mark activity as completed.
-$islastchapter = false;
-if (!$nextid) {
-    $islastchapter = true;
-}
+$islastchapter = $chapter->pagenum + 1 > count($chapters);