first commit

mod/forum/classes/output/big_search_form.php

@@ -0,0 +1,263 @@
+<?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/>.
+
+/**
+ * Big search form.
+ *
+ * @package    mod_forum
+ * @copyright  2016 Frédéric Massart - FMCorz.net
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace mod_forum\output;
+defined('MOODLE_INTERNAL') || die();
+
+use html_writer;
+use moodle_url;
+use renderable;
+use renderer_base;
+use stdClass;
+use templatable;
+
+/**
+ * Big search form class.
+ *
+ * @package    mod_forum
+ * @copyright  2016 Frédéric Massart - FMCorz.net
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class big_search_form implements renderable, templatable {
+
+    public $course;
+    public $datefrom;
+    public $dateto;
+    public $forumoptions;
+    public $fullwords;
+    public $notwords;
+    public $phrase;
+    public $showfullwords;
+    public $subject;
+    public $user;
+    public $words;
+    public $tags;
+    /** @var string The URL of the search form. */
+    public $actionurl;
+    /** @var bool Is the user a guest user? */
+    public $guestuser;
+    /** @var bool Whether the include starredonly checkbox is checked. */
+    public $starredonly;
+    /** @var int forum ID. */
+    public $forumid;
+
+    /**
+     * Constructor.
+     *
+     * @param object $course The course.
+     * @param object $user The user.
+     */
+    public function __construct($course) {
+        global $DB, $USER;
+        $this->course = $course;
+        $this->tags = [];
+        $this->guestuser = !isloggedin() || isguestuser($USER);
+        $this->showfullwords = $DB->get_dbfamily() == 'mysql' || $DB->get_dbfamily() == 'postgres';
+        $this->actionurl = new moodle_url('/mod/forum/search.php');
+
+        $forumoptions = ['' => get_string('allforums', 'forum')] + forum_menu_list($course);
+        $this->forumoptions = array_map(function($option) use ($forumoptions) {
+            return [
+                'value' => $option,
+                'name' => $forumoptions[$option]
+            ];
+        }, array_keys($forumoptions));
+    }
+
+    /**
+     * Set date from.
+     *
+     * @param mixed $value Date from.
+     */
+    public function set_datefrom($value) {
+        $this->datefrom = $value;
+    }
+
+    /**
+     * Set date to.
+     *
+     * @param mixed $value Date to.
+     */
+    public function set_dateto($value) {
+        $this->dateto = $value;
+    }
+
+    /**
+     * Set full words.
+     *
+     * @param mixed $value Full words.
+     */
+    public function set_fullwords($value) {
+        $this->fullwords = $value;
+    }
+
+    /**
+     * Set not words.
+     *
+     * @param mixed $value Not words.
+     */
+    public function set_notwords($value) {
+        $this->notwords = $value;
+    }
+
+    /**
+     * Set phrase.
+     *
+     * @param mixed $value Phrase.
+     */
+    public function set_phrase($value) {
+        $this->phrase = $value;
+    }
+
+    /**
+     * Set subject.
+     *
+     * @param mixed $value Subject.
+     */
+    public function set_subject($value) {
+        $this->subject = $value;
+    }
+
+    /**
+     * Set user.
+     *
+     * @param mixed $value User.
+     */
+    public function set_user($value) {
+        $this->user = $value;
+    }
+
+    /**
+     * Set words.
+     *
+     * @param mixed $value Words.
+     */
+    public function set_words($value) {
+        $this->words = $value;
+    }
+
+    /**
+     * Set tags.
+     *
+     * @param mixed $value Tags.
+     */
+    public function set_tags($value) {
+        $this->tags = $value;
+    }
+
+    /**
+     * Set starred only value.
+     *
+     * @param mixed $value Bool.
+     */
+    public function set_starredonly($value) {
+        $this->starredonly = $value;
+    }
+
+    /**
+     * Forum ID setter search criteria.
+     *
+     * @param int $forumid The forum ID.
+     */
+    public function set_forumid($forumid) {
+        $this->forumid = $forumid;
+    }
+
+    public function export_for_template(renderer_base $output) {
+        global $DB, $CFG, $PAGE;
+        $data = new stdClass();
+
+        $data->courseid = $this->course->id;
+        $data->words = $this->words;
+        $data->phrase = $this->phrase;
+        $data->notwords = $this->notwords;
+        $data->fullwords = $this->fullwords;
+        $data->datefromchecked = !empty($this->datefrom);
+        $data->datetochecked = !empty($this->dateto);
+        $data->subject = $this->subject;
+        $data->user = $this->user;
+        $data->showfullwords = $this->showfullwords;
+        $data->guestuser = $this->guestuser;
+        $data->starredonly = $this->starredonly;
+        $data->actionurl = $this->actionurl->out(false);
+
+        $tagtypestoshow = \core_tag_area::get_showstandard('mod_forum', 'forum_posts');
+        $showstandard = ($tagtypestoshow != \core_tag_tag::HIDE_STANDARD);
+        $typenewtags = ($tagtypestoshow != \core_tag_tag::STANDARD_ONLY);
+
+        $PAGE->requires->js_call_amd('core/form-autocomplete', 'enhance', $params = array('#tags', $typenewtags, '',
+                              get_string('entertags', 'tag'), false, $showstandard, get_string('noselection', 'form')));
+
+        $data->tagsenabled = \core_tag_tag::is_enabled('mod_forum', 'forum_posts');
+        $namefield = empty($CFG->keeptagnamecase) ? 'name' : 'rawname';
+        $tags = $DB->get_records('tag',
+            array('isstandard' => 1, 'tagcollid' => \core_tag_area::get_collection('mod_forum', 'forum_posts')),
+            $namefield, 'rawname,' . $namefield . ' as fieldname');
+        $data->tags = [];
+        foreach ($tags as $tag) {
+            $data->tagoptions[] = ['value'    => $tag->rawname,
+                                   'text'     => $tag->fieldname,
+                                   'selected' => in_array($tag->rawname, $this->tags)
+            ];
+        }
+
+        $datefrom = $this->datefrom;
+        if (empty($datefrom)) {
+            $datefrom = make_timestamp(2000, 1, 1, 0, 0, 0);
+        }
+
+        $dateto = $this->dateto;
+        if (empty($dateto)) {
+            $dateto = time() + HOURSECS;
+        }
+
+        $data->datefromfields = html_writer::div(html_writer::select_time('days', 'fromday', $datefrom), 'mb-3 fitem ml-2')
+                              . html_writer::div(html_writer::select_time('months', 'frommonth', $datefrom),
+                           'mb-3 fitem ml-2')
+                              . html_writer::div(html_writer::select_time('years', 'fromyear', $datefrom), 'mb-3 fitem ml-2')
+                              . html_writer::div(html_writer::select_time('hours', 'fromhour', $datefrom), 'mb-3 fitem ml-2')
+                              . html_writer::div(html_writer::select_time('minutes', 'fromminute', $datefrom),
+                           'mb-3 fitem ml-2');
+
+        $data->datetofields = html_writer::div(html_writer::select_time('days', 'today', $dateto), 'mb-3 fitem ml-2')
+                            . html_writer::div(html_writer::select_time('months', 'tomonth', $dateto), 'mb-3 fitem ml-2')
+                            . html_writer::div(html_writer::select_time('years', 'toyear', $dateto), 'mb-3 fitem ml-2')
+                            . html_writer::div(html_writer::select_time('hours', 'tohour', $dateto), 'mb-3 fitem ml-2')
+                            . html_writer::div(html_writer::select_time('minutes', 'tominute', $dateto), 'mb-3 fitem ml-2');
+
+        if ($this->forumid && !empty($this->forumoptions)) {
+            foreach ($this->forumoptions as $index => $option) {
+                if ($option['value'] == $this->forumid) {
+                    $this->forumoptions[$index]['selected'] = true;
+                } else {
+                    $this->forumoptions[$index]['selected'] = false;
+                }
+            }
+        }
+        $data->forumoptions = $this->forumoptions;
+
+        return $data;
+    }
+
+}

mod/forum/classes/output/courseformat/activitybadge.php

@@ -0,0 +1,47 @@
+<?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/>.
+
+namespace mod_forum\output\courseformat;
+
+/**
+ * Activity badge forum class, used for rendering unread messages.
+ *
+ * @package    mod_forum
+ * @copyright  2023 Sara Arjona <sara@moodle.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class activitybadge extends \core_courseformat\output\activitybadge {
+
+    /**
+     * This method will be called before exporting the template.
+     */
+    protected function update_content(): void {
+        global $CFG;
+
+        require_once($CFG->dirroot . '/mod/forum/lib.php');
+
+        if (forum_tp_can_track_forums()) {
+            if ($unread = forum_tp_count_forum_unread_posts($this->cminfo, $this->cminfo->get_course())) {
+                if ($unread == 1) {
+                    $this->content = get_string('unreadpostsone', 'forum');
+                } else {
+                    $this->content = get_string('unreadpostsnumber', 'forum', $unread);
+                }
+                $this->style = self::STYLES['dark'];
+            }
+        }
+    }
+}

mod/forum/classes/output/email/renderer.php

@@ -0,0 +1,85 @@
+<?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/>.
+
+/**
+ * Forum post renderable.
+ *
+ * @package    mod_forum
+ * @copyright  2015 Andrew Nicols <andrew@nicols.co.uk>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace mod_forum\output\email;
+
+defined('MOODLE_INTERNAL') || die();
+
+require_once(__DIR__ . '/../../../renderer.php');
+
+/**
+ * Forum post renderable.
+ *
+ * @since      Moodle 3.0
+ * @package    mod_forum
+ * @copyright  2015 Andrew Nicols <andrew@nicols.co.uk>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class renderer extends \mod_forum_renderer {
+
+    /**
+     * The template name for this renderer.
+     *
+     * @return string
+     */
+    public function forum_post_template() {
+        return 'forum_post_email_htmlemail';
+    }
+
+    /**
+     * The HTML version of the e-mail message.
+     *
+     * @param \stdClass $cm
+     * @param \stdClass $post
+     * @return string
+     */
+    public function format_message_text($cm, $post) {
+        $context = \context_module::instance($cm->id);
+        $message = file_rewrite_pluginfile_urls(
+            $post->message,
+            'pluginfile.php',
+            $context->id,
+            'mod_forum',
+            'post',
+            $post->id,
+            [
+                'includetoken' => true,
+            ]);
+        $options = new \stdClass();
+        $options->para = true;
+        $options->context = $context;
+        return format_text($message, $post->messageformat, $options);
+    }
+
+    /**
+     * The HTML version of the attachments list.
+     *
+     * @param \stdClass $cm
+     * @param \stdClass $post
+     * @return string
+     */
+    public function format_message_attachments($cm, $post) {
+        return forum_print_attachments($post, $cm, "html");
+    }
+}

mod/forum/classes/output/email/renderer_textemail.php

@@ -0,0 +1,72 @@
+<?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/>.
+
+/**
+ * Forum post renderable.
+ *
+ * @package    mod_forum
+ * @copyright  2015 Andrew Nicols <andrew@nicols.co.uk>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace mod_forum\output\email;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Forum post renderable.
+ *
+ * @since      Moodle 3.0
+ * @package    mod_forum
+ * @copyright  2015 Andrew Nicols <andrew@nicols.co.uk>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class renderer_textemail extends renderer {
+
+    /**
+     * The template name for this renderer.
+     *
+     * @return string
+     */
+    public function forum_post_template() {
+        return 'forum_post_email_textemail';
+    }
+
+    /**
+     * The plaintext version of the e-mail message.
+     *
+     * @param \stdClass $cm
+     * @param \stdClass $post
+     * @return string
+     */
+    public function format_message_text($cm, $post) {
+        $message = file_rewrite_pluginfile_urls($post->message, 'pluginfile.php',
+            \context_module::instance($cm->id)->id,
+            'mod_forum', 'post', $post->id);
+        return format_text_email($message, $post->messageformat);
+    }
+
+    /**
+     * The plaintext version of the attachments list.
+     *
+     * @param \stdClass $cm
+     * @param \stdClass $post
+     * @return string
+     */
+    public function format_message_attachments($cm, $post) {
+        return forum_print_attachments($post, $cm, "text");
+    }
+}

mod/forum/classes/output/emaildigestbasic/renderer.php

@@ -0,0 +1,47 @@
+<?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/>.
+
+/**
+ * Forum post renderable.
+ *
+ * @package    mod_forum
+ * @copyright  2015 Andrew Nicols <andrew@nicols.co.uk>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace mod_forum\output\emaildigestbasic;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Forum post renderable.
+ *
+ * @since      Moodle 3.0
+ * @package    mod_forum
+ * @copyright  2015 Andrew Nicols <andrew@nicols.co.uk>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class renderer extends \mod_forum\output\email\renderer {
+
+    /**
+     * The template name for this renderer.
+     *
+     * @return string
+     */
+    public function forum_post_template() {
+        return 'forum_post_emaildigestbasic_htmlemail';
+    }
+}

mod/forum/classes/output/emaildigestbasic/renderer_textemail.php

@@ -0,0 +1,69 @@
+<?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/>.
+
+/**
+ * Forum post renderable.
+ *
+ * @package    mod_forum
+ * @copyright  2015 Andrew Nicols <andrew@nicols.co.uk>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace mod_forum\output\emaildigestbasic;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Forum post renderable.
+ *
+ * @since      Moodle 3.0
+ * @package    mod_forum
+ * @copyright  2015 Andrew Nicols <andrew@nicols.co.uk>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class renderer_textemail extends \mod_forum\output\email\renderer_textemail {
+
+    /**
+     * The template name for this renderer.
+     *
+     * @return string
+     */
+    public function forum_post_template() {
+        return 'forum_post_emaildigestbasic_textemail';
+    }
+
+    /**
+     * The plaintext version of the e-mail message.
+     *
+     * @param \stdClass $cm
+     * @param \stdClass $post
+     * @return string
+     */
+    public function format_message_text($cm, $post) {
+        $context = \context_module::instance($cm->id);
+        $message = file_rewrite_pluginfile_urls(
+            $post->message,
+            'pluginfile.php',
+            $context->id,
+            'mod_forum',
+            'post',
+            $post->id,
+            [
+                'includetoken' => true,
+            ]);
+        return format_text_email($message, $post->messageformat);
+    }
+}

mod/forum/classes/output/emaildigestfull/renderer.php

@@ -0,0 +1,47 @@
+<?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/>.
+
+/**
+ * Forum post renderable.
+ *
+ * @package    mod_forum
+ * @copyright  2015 Andrew Nicols <andrew@nicols.co.uk>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace mod_forum\output\emaildigestfull;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Forum post renderable.
+ *
+ * @since      Moodle 3.0
+ * @package    mod_forum
+ * @copyright  2015 Andrew Nicols <andrew@nicols.co.uk>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class renderer extends \mod_forum\output\email\renderer {
+
+    /**
+     * The template name for this renderer.
+     *
+     * @return string
+     */
+    public function forum_post_template() {
+        return 'forum_post_emaildigestfull_htmlemail';
+    }
+}

mod/forum/classes/output/emaildigestfull/renderer_textemail.php

@@ -0,0 +1,69 @@
+<?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/>.
+
+/**
+ * Forum post renderable.
+ *
+ * @package    mod_forum
+ * @copyright  2015 Andrew Nicols <andrew@nicols.co.uk>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace mod_forum\output\emaildigestfull;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Forum post renderable.
+ *
+ * @since      Moodle 3.0
+ * @package    mod_forum
+ * @copyright  2015 Andrew Nicols <andrew@nicols.co.uk>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class renderer_textemail extends \mod_forum\output\email\renderer_textemail {
+
+    /**
+     * The template name for this renderer.
+     *
+     * @return string
+     */
+    public function forum_post_template() {
+        return 'forum_post_emaildigestfull_textemail';
+    }
+
+    /**
+     * The plaintext version of the e-mail message.
+     *
+     * @param \stdClass $cm
+     * @param \stdClass $post
+     * @return string
+     */
+    public function format_message_text($cm, $post) {
+        $context = \context_module::instance($cm->id);
+        $message = file_rewrite_pluginfile_urls(
+            $post->message,
+            'pluginfile.php',
+            $context->id,
+            'mod_forum',
+            'post',
+            $post->id,
+            [
+                'includetoken' => true,
+            ]);
+        return format_text_email($message, $post->messageformat);
+    }
+}

mod/forum/classes/output/forum_actionbar.php

@@ -0,0 +1,135 @@
+<?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/>.
+
+namespace mod_forum\output;
+
+use renderable;
+use renderer_base;
+use templatable;
+use moodle_url;
+use help_icon;
+use mod_forum\local\entities\forum as forum_entity;
+
+/**
+ * Render activity page for tertiary nav
+ *
+ * Render elements search forum, add new discussion button and subscribe all
+ * to the page action.
+ *
+ * @package mod_forum
+ * @copyright 2021 Sujith Haridasan <sujith@moodle.com>
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class forum_actionbar implements renderable, templatable {
+    /**
+     * @var forum_entity $forum
+     */
+    private $forum;
+
+    /**
+     * @var \stdClass $course
+     */
+    private $course;
+
+    /**
+     * @var mixed $groupid
+     */
+    private $groupid;
+
+    /**
+     * @var string $search
+     */
+    private $search;
+
+    /**
+     * forum_actionbar constructor.
+     *
+     * @param forum_entity $forum The forum object.
+     * @param \stdClass $course The course object.
+     * @param int|null $groupid The group id.
+     * @param string $search The search string.
+     */
+    public function __construct(forum_entity $forum, \stdClass $course, ?int $groupid, string $search) {
+        $this->forum = $forum;
+        $this->course = $course;
+        $this->groupid = $groupid;
+        $this->search = $search;
+    }
+
+    /**
+     * Render the new discussion button.
+     *
+     * @return string HTML button
+     */
+    private function get_new_discussion_topic_button(): string {
+        global $USER;
+        $renderfactory = \mod_forum\local\container::get_renderer_factory();
+        $discussionrenderer = $renderfactory->get_discussion_list_renderer($this->forum);
+        return $discussionrenderer->render_new_discussion($USER, $this->groupid);
+    }
+
+    /**
+     * Data for the template.
+     *
+     * @param renderer_base $output The render_base object.
+     * @return array data for the template
+     */
+    public function export_for_template(renderer_base $output): array {
+        global $USER;
+        $actionurl = (new moodle_url('/mod/forum/search.php'))->out(false);
+        $helpicon = new help_icon('search', 'core');
+        $hiddenfields = [
+            (object) ['name' => 'id', 'value' => $this->course->id],
+        ];
+        $shownewdiscussionbtn = '';
+        if ($this->forum->get_type() !== 'single') {
+            $shownewdiscussionbtn = $this->get_new_discussion_topic_button();
+        }
+        $data = [
+            'action' => $actionurl,
+            'hiddenfields' => $hiddenfields,
+            'query' => $this->search,
+            'helpicon' => $helpicon->export_for_template($output),
+            'inputname' => 'search',
+            'searchstring' => get_string('searchforums', 'mod_forum'),
+            'newdiscussionbtn' => $shownewdiscussionbtn,
+        ];
+
+        $legacydatamapperfactory = \mod_forum\local\container::get_legacy_data_mapper_factory();
+        $forumobject = $legacydatamapperfactory->get_forum_data_mapper()->to_legacy_object($this->forum);
+        $context = $this->forum->get_context();
+        $activeenrolled = is_enrolled($context, $USER, '', true);
+        $canmanage = has_capability('mod/forum:managesubscriptions', $context);
+        $cansubscribe = $activeenrolled && !($this->forum->get_subscription_mode() === FORUM_FORCESUBSCRIBE) &&
+            (!($this->forum->get_subscription_mode() === FORUM_DISALLOWSUBSCRIBE) || $canmanage);
+        if ($cansubscribe) {
+            $returnurl =
+                (new moodle_url('/mod/forum/view.php', ['id' => $this->forum->get_course_module_record()->id]))->out(false);
+            if (!\mod_forum\subscriptions::is_subscribed($USER->id, $forumobject, null, $this->forum->get_course_module_record())) {
+                $data['subscribetoforum'] = (new moodle_url(
+                    '/mod/forum/subscribe.php',
+                    ['id' => $forumobject->id, 'sesskey' => sesskey(), 'returnurl' => $returnurl]
+                    ))->out(false);
+            } else {
+                $data['unsubscribefromforum'] = (new moodle_url(
+                    '/mod/forum/subscribe.php',
+                    ['id' => $forumobject->id, 'sesskey' => sesskey(), 'returnurl' => $returnurl]
+                ))->out(false);
+            }
+        }
+        return $data;
+    }
+}

mod/forum/classes/output/forum_post.php

@@ -0,0 +1,587 @@
+<?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/>.
+
+/**
+ * Forum post renderable.
+ *
+ * @package    mod_forum
+ * @copyright  2015 Andrew Nicols <andrew@nicols.co.uk>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace mod_forum\output;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Forum post renderable.
+ *
+ * @copyright  2015 Andrew Nicols <andrew@nicols.co.uk>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ *
+ * @property boolean $viewfullnames Whether to override fullname()
+ */
+class forum_post implements \renderable, \templatable {
+
+    /**
+     * The course that the forum post is in.
+     *
+     * @var object $course
+     */
+    protected $course = null;
+
+    /**
+     * The course module for the forum.
+     *
+     * @var object $cm
+     */
+    protected $cm = null;
+
+    /**
+     * The forum that the post is in.
+     *
+     * @var object $forum
+     */
+    protected $forum = null;
+
+    /**
+     * The discussion that the forum post is in.
+     *
+     * @var object $discussion
+     */
+    protected $discussion = null;
+
+    /**
+     * The forum post being displayed.
+     *
+     * @var object $post
+     */
+    protected $post = null;
+
+    /**
+     * Whether the user can reply to this post.
+     *
+     * @var boolean $canreply
+     */
+    protected $canreply = false;
+
+    /**
+     * Whether to override forum display when displaying usernames.
+     * @var boolean $viewfullnames
+     */
+    protected $viewfullnames = false;
+
+    /**
+     * The user that is reading the post.
+     *
+     * @var object $userto
+     */
+    protected $userto = null;
+
+    /**
+     * The user that wrote the post.
+     *
+     * @var object $author
+     */
+    protected $author = null;
+
+    /**
+     * An associative array indicating which keys on this object should be writeable.
+     *
+     * @var array $writablekeys
+     */
+    protected $writablekeys = array(
+        'viewfullnames'    => true,
+    );
+
+    /** @var \stdClass user record. */
+    protected $userfrom;
+
+    /**
+     * Builds a renderable forum post
+     *
+     * @param object $course Course of the forum
+     * @param object $cm Course Module of the forum
+     * @param object $forum The forum of the post
+     * @param object $discussion Discussion thread in which the post appears
+     * @param object $post The post
+     * @param object $author Author of the post
+     * @param object $recipient Recipient of the email
+     * @param bool $canreply True if the user can reply to the post
+     */
+    public function __construct($course, $cm, $forum, $discussion, $post, $author, $recipient, $canreply) {
+        $this->course = $course;
+        $this->cm = $cm;
+        $this->forum = $forum;
+        $this->discussion = $discussion;
+        $this->post = $post;
+        $this->author = $author;
+        $this->userto = $recipient;
+        $this->canreply = $canreply;
+    }
+
+    /**
+     * Export this data so it can be used as the context for a mustache template.
+     *
+     * @param \mod_forum_renderer $renderer The render to be used for formatting the message and attachments
+     * @param bool $plaintext Whethe the target is a plaintext target
+     * @return array Data ready for use in a mustache template
+     */
+    public function export_for_template(\renderer_base $renderer, $plaintext = false) {
+        if ($plaintext) {
+            return $this->export_for_template_text($renderer);
+        } else {
+            return $this->export_for_template_html($renderer);
+        }
+    }
+
+    /**
+     * Export this data so it can be used as the context for a mustache template.
+     *
+     * @param \mod_forum_renderer $renderer The render to be used for formatting the message and attachments
+     * @return array Data ready for use in a mustache template
+     */
+    protected function export_for_template_text(\mod_forum_renderer $renderer) {
+        $data = $this->export_for_template_shared($renderer);
+        return $data + array(
+            'id'                            => html_entity_decode($this->post->id, ENT_COMPAT),
+            'coursename'                    => html_entity_decode($this->get_coursename(), ENT_COMPAT),
+            'courselink'                    => html_entity_decode($this->get_courselink(), ENT_COMPAT),
+            'forumname'                     => html_entity_decode($this->get_forumname(), ENT_COMPAT),
+            'showdiscussionname'            => html_entity_decode($this->get_showdiscussionname(), ENT_COMPAT),
+            'discussionname'                => html_entity_decode($this->get_discussionname(), ENT_COMPAT),
+            'subject'                       => html_entity_decode($this->get_subject(), ENT_COMPAT),
+            'authorfullname'                => html_entity_decode($this->get_author_fullname(), ENT_COMPAT),
+            'postdate'                      => html_entity_decode($this->get_postdate(), ENT_COMPAT),
+
+            // Format some components according to the renderer.
+            'message'                       => html_entity_decode($renderer->format_message_text($this->cm, $this->post), ENT_COMPAT),
+            'attachments'                   => html_entity_decode($renderer->format_message_attachments($this->cm, $this->post), ENT_COMPAT),
+
+            'canreply'                      => $this->canreply,
+            'permalink'                     => $this->get_permalink(),
+            'firstpost'                     => $this->get_is_firstpost(),
+            'replylink'                     => $this->get_replylink(),
+            'unsubscribediscussionlink'     => $this->get_unsubscribediscussionlink(),
+            'unsubscribeforumlink'          => $this->get_unsubscribeforumlink(),
+            'parentpostlink'                => $this->get_parentpostlink(),
+
+            'forumindexlink'                => $this->get_forumindexlink(),
+            'forumviewlink'                 => $this->get_forumviewlink(),
+            'discussionlink'                => $this->get_discussionlink(),
+
+            'authorlink'                    => $this->get_authorlink(),
+            'authorpicture'                 => $this->get_author_picture($renderer),
+
+            'grouppicture'                  => $this->get_group_picture($renderer),
+        );
+    }
+
+    /**
+     * Export this data so it can be used as the context for a mustache template.
+     *
+     * @param \mod_forum_renderer $renderer The render to be used for formatting the message and attachments
+     * @return array Data ready for use in a mustache template
+     */
+    protected function export_for_template_html(\mod_forum_renderer $renderer) {
+        $data = $this->export_for_template_shared($renderer);
+        return $data + array(
+            'id'                            => $this->post->id,
+            'coursename'                    => $this->get_coursename(),
+            'courselink'                    => $this->get_courselink(),
+            'forumname'                     => $this->get_forumname(),
+            'showdiscussionname'            => $this->get_showdiscussionname(),
+            'discussionname'                => $this->get_discussionname(),
+            'subject'                       => $this->get_subject(),
+            'authorfullname'                => $this->get_author_fullname(),
+            'postdate'                      => $this->get_postdate(),
+
+            // Format some components according to the renderer.
+            'message'                       => $renderer->format_message_text($this->cm, $this->post),
+            'attachments'                   => $renderer->format_message_attachments($this->cm, $this->post),
+        );
+    }
+
+    /**
+     * Export this data so it can be used as the context for a mustache template.
+     *
+     * @param \mod_forum_renderer $renderer The render to be used for formatting the message and attachments
+     * @return stdClass Data ready for use in a mustache template
+     */
+    protected function export_for_template_shared(\mod_forum_renderer $renderer) {
+        return array(
+            'canreply'                      => $this->canreply,
+            'permalink'                     => $this->get_permalink(),
+            'firstpost'                     => $this->get_is_firstpost(),
+            'replylink'                     => $this->get_replylink(),
+            'unsubscribediscussionlink'     => $this->get_unsubscribediscussionlink(),
+            'unsubscribeforumlink'          => $this->get_unsubscribeforumlink(),
+            'parentpostlink'                => $this->get_parentpostlink(),
+
+            'forumindexlink'                => $this->get_forumindexlink(),
+            'forumviewlink'                 => $this->get_forumviewlink(),
+            'discussionlink'                => $this->get_discussionlink(),
+
+            'authorlink'                    => $this->get_authorlink(),
+            'authorpicture'                 => $this->get_author_picture($renderer),
+
+            'grouppicture'                  => $this->get_group_picture($renderer),
+
+            'isprivatereply'                => !empty($this->post->privatereplyto),
+        );
+    }
+
+    /**
+     * Magically sets a property against this object.
+     *
+     * @param string $key
+     * @param mixed $value
+     */
+    public function __set($key, $value) {
+        // First attempt to use the setter function.
+        $methodname = 'set_' . $key;
+        if (method_exists($this, $methodname)) {
+            return $this->{$methodname}($value);
+        }
+
+        // Fall back to the writable keys list.
+        if (isset($this->writablekeys[$key]) && $this->writablekeys[$key]) {
+            return $this->{$key} = $value;
+        }
+
+        // Throw an error rather than fail silently.
+        throw new \coding_exception('Tried to set unknown property "' . $key . '"');
+    }
+
+    /**
+     * Whether this is the first post.
+     *
+     * @return boolean
+     */
+    public function get_is_firstpost() {
+        return empty($this->post->parent);
+    }
+
+    /**
+     * Get the link to the course.
+     *
+     * @return string
+     */
+    public function get_courselink() {
+        $link = new \moodle_url(
+            // Posts are viewed on the topic.
+            '/course/view.php', array(
+                'id'    => $this->course->id,
+            )
+        );
+
+        return $link->out(false);
+    }
+
+    /**
+     * Get the link to the forum index for this course.
+     *
+     * @return string
+     */
+    public function get_forumindexlink() {
+        $link = new \moodle_url(
+            // Posts are viewed on the topic.
+            '/mod/forum/index.php', array(
+                'id'    => $this->course->id,
+            )
+        );
+
+        return $link->out(false);
+    }
+
+    /**
+     * Get the link to the view page for this forum.
+     *
+     * @return string
+     */
+    public function get_forumviewlink() {
+        $link = new \moodle_url(
+            // Posts are viewed on the topic.
+            '/mod/forum/view.php', array(
+                'f' => $this->forum->id,
+            )
+        );
+
+        return $link->out(false);
+    }
+
+    /**
+     * Get the link to the current discussion.
+     *
+     * @return string
+     */
+    protected function _get_discussionlink() {
+        return new \moodle_url(
+            // Posts are viewed on the topic.
+            '/mod/forum/discuss.php', array(
+                // Within a discussion.
+                'd' => $this->discussion->id,
+            )
+        );
+    }
+
+    /**
+     * Get the link to the current discussion.
+     *
+     * @return string
+     */
+    public function get_discussionlink() {
+        $link = $this->_get_discussionlink();
+
+        return $link->out(false);
+    }
+
+    /**
+     * Get the link to the current post, including post anchor.
+     *
+     * @return string
+     */
+    public function get_permalink() {
+        $link = $this->_get_discussionlink();
+        $link->set_anchor($this->get_postanchor());
+
+        return $link->out(false);
+    }
+
+    /**
+     * Get the link to the parent post.
+     *
+     * @return string
+     */
+    public function get_parentpostlink() {
+        $link = $this->_get_discussionlink();
+        $link->param('parent', $this->post->parent);
+
+        return $link->out(false);
+    }
+
+    /**
+     * Get the link to the author's profile page.
+     *
+     * @return string
+     */
+    public function get_authorlink() {
+        $link = new \moodle_url(
+            '/user/view.php', array(
+                'id' => $this->post->userid,
+                'course' => $this->course->id,
+            )
+        );
+
+        return $link->out(false);
+    }
+
+    /**
+     * Get the link to unsubscribe from the forum.
+     *
+     * @return string
+     */
+    public function get_unsubscribeforumlink() {
+        if (!\mod_forum\subscriptions::is_subscribable($this->forum)) {
+            return null;
+        }
+        $link = new \moodle_url(
+            '/mod/forum/subscribe.php', array(
+                'id' => $this->forum->id,
+            )
+        );
+
+        return $link->out(false);
+    }
+
+    /**
+     * Get the link to unsubscribe from the discussion.
+     *
+     * @return string
+     */
+    public function get_unsubscribediscussionlink() {
+        if (!\mod_forum\subscriptions::is_subscribable($this->forum)) {
+            return null;
+        }
+        $link = new \moodle_url(
+            '/mod/forum/subscribe.php', array(
+                'id'  => $this->forum->id,
+                'd'   => $this->discussion->id,
+            )
+        );
+
+        return $link->out(false);
+    }
+
+    /**
+     * Get the link to reply to the current post.
+     *
+     * @return string
+     */
+    public function get_replylink() {
+        return new \moodle_url(
+            '/mod/forum/post.php', array(
+                'reply' => $this->post->id,
+            )
+        );
+    }
+
+    /**
+     * The formatted subject for the current post.
+     *
+     * @return string
+     */
+    public function get_subject() {
+        return format_string($this->post->subject, true);
+    }
+
+    /**
+     * The plaintext anchor id for the current post.
+     *
+     * @return string
+     */
+    public function get_postanchor() {
+        return 'p' . $this->post->id;
+    }
+
+    /**
+     * ID number of the course that the forum is in.
+     *
+     * @return string
+     */
+    public function get_courseidnumber() {
+        return s($this->course->idnumber);
+    }
+
+    /**
+     * The full name of the course that the forum is in.
+     *
+     * @return string
+     */
+    public function get_coursefullname() {
+        return format_string($this->course->fullname, true, array(
+            'context' => \context_course::instance($this->course->id),
+        ));
+    }
+
+    /**
+     * The name of the course that the forum is in.
+     *
+     * @return string
+     */
+    public function get_coursename() {
+        return format_string($this->course->shortname, true, array(
+            'context' => \context_course::instance($this->course->id),
+        ));
+    }
+
+    /**
+     * The name of the forum.
+     *
+     * @return string
+     */
+    public function get_forumname() {
+        return format_string($this->forum->name, true);
+    }
+
+    /**
+     * The name of the current discussion.
+     *
+     * @return string
+     */
+    public function get_discussionname() {
+        return format_string($this->discussion->name, true);
+    }
+
+    /**
+     * Whether to show the discussion name.
+     * If the forum name matches the discussion name, the discussion name
+     * is not typically displayed.
+     *
+     * @return boolean
+     */
+    public function get_showdiscussionname() {
+        return ($this->forum->name !== $this->discussion->name);
+    }
+
+    /**
+     * The fullname of the post author.
+     *
+     * @return string
+     */
+    public function get_author_fullname() {
+        return fullname($this->author, $this->viewfullnames);
+    }
+
+    /**
+     * The recipient of the post.
+     *
+     * @return string
+     */
+    protected function get_postto() {
+        global $USER;
+        if (null === $this->userto) {
+            return $USER;
+        }
+
+        return $this->userto;
+    }
+
+    /**
+     * The date of the post, formatted according to the postto user's
+     * preferences.
+     *
+     * @return string
+     */
+    public function get_postdate() {
+        global $CFG;
+
+        $postmodified = $this->post->modified;
+        if (!empty($CFG->forum_enabletimedposts) && ($this->discussion->timestart > $postmodified)) {
+            $postmodified = $this->discussion->timestart;
+        }
+
+        return userdate($postmodified, "", \core_date::get_user_timezone($this->get_postto()));
+    }
+
+    /**
+     * The HTML for the author's user picture.
+     *
+     * @param   \renderer_base $renderer
+     * @return string
+     */
+    public function get_author_picture(\renderer_base $renderer) {
+        return $renderer->user_picture($this->author, array('courseid' => $this->course->id));
+    }
+
+    /**
+     * The HTML for a group picture.
+     *
+     * @param   \renderer_base $renderer
+     * @return string
+     */
+    public function get_group_picture(\renderer_base $renderer) {
+        if (isset($this->userfrom->groups)) {
+            $groups = $this->userfrom->groups[$this->forum->id];
+        } else {
+            $groups = groups_get_all_groups($this->course->id, $this->author->id, $this->cm->groupingid);
+        }
+
+        if ($this->get_is_firstpost()) {
+            return print_group_picture($groups, $this->course->id, false, true, true, true);
+        }
+    }
+}

mod/forum/classes/output/forum_post_email.php

@@ -0,0 +1,36 @@
+<?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/>.
+
+/**
+ * Forum post renderable for e-mail.
+ *
+ * @package    mod_forum
+ * @copyright  2015 Andrew Nicols <andrew@nicols.co.uk>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace mod_forum\output;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Forum post renderable for use in e-mail.
+ *
+ * @copyright  2015 Andrew Nicols <andrew@nicols.co.uk>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class forum_post_email extends forum_post {
+}

mod/forum/classes/output/quick_search_form.php

@@ -0,0 +1,80 @@
+<?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/>.
+
+/**
+ * Quick search form renderable.
+ *
+ * @package    mod_forum
+ * @copyright  2016 Frédéric Massart - FMCorz.net
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace mod_forum\output;
+defined('MOODLE_INTERNAL') || die();
+
+use help_icon;
+use moodle_url;
+use renderable;
+use renderer_base;
+use templatable;
+
+/**
+ * Quick search form renderable class.
+ *
+ * @package    mod_forum
+ * @copyright  2016 Frédéric Massart - FMCorz.net
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class quick_search_form implements renderable, templatable {
+
+    /** @var int The course ID. */
+    protected $courseid;
+    /** @var string Current query. */
+    protected $query;
+    /** @var moodle_url The form action URL. */
+    protected $actionurl;
+    /** @var help_icon The help icon. */
+    protected $helpicon;
+
+    /**
+     * Constructor.
+     *
+     * @param int $courseid The course ID.
+     * @param string $query The current query.
+     */
+    public function __construct($courseid, $query = '') {
+        $this->courseid = $courseid;
+        $this->query = $query;
+        $this->actionurl = new moodle_url('/mod/forum/search.php');
+        $this->helpicon = new help_icon('search', 'core');
+    }
+
+    public function export_for_template(renderer_base $output) {
+        $hiddenfields = [
+            (object) ['name' => 'id', 'value' => $this->courseid],
+        ];
+        $data = [
+            'action' => $this->actionurl->out(false),
+            'hiddenfields' => $hiddenfields,
+            'query' => $this->query,
+            'helpicon' => $this->helpicon->export_for_template($output),
+            'inputname' => 'search',
+            'searchstring' => get_string('searchforums', 'mod_forum')
+        ];
+        return $data;
+    }
+
+}

mod/forum/classes/output/subscription_actionbar.php

@@ -0,0 +1,166 @@
+<?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/>.
+
+namespace mod_forum\output;
+
+use moodle_url;
+use renderer_base;
+use url_select;
+use renderable;
+use templatable;
+
+/**
+ * Renders the subscribers page for this activity.
+ *
+ * @package   mod_forum
+ * @copyright 2021 Sujith Haridasan <sujith@moodle.com>
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class subscription_actionbar implements renderable, templatable {
+    /** @var int course id */
+    private $id;
+
+    /** @var moodle_url */
+    private $currenturl;
+
+    /** @var \stdClass  */
+    private $forum;
+
+    /** @var int */
+    private $edit;
+
+    /**
+     * subscription_actionbar constructor.
+     *
+     * @param int $id The forum id.
+     * @param moodle_url $currenturl Current URL.
+     * @param \stdClass $forum The forum object.
+     * @param int $edit This argument decides to show view/manage subscribers view.
+     */
+    public function __construct(int $id, moodle_url $currenturl, \stdClass $forum, int $edit) {
+        $this->id = $id;
+        $this->currenturl = $currenturl;
+        $this->forum = $forum;
+        $this->edit = $edit;
+    }
+
+    /**
+     * Create url select menu for subscription option
+     *
+     * @return url_select|null the url_select object
+     */
+    private function create_subscription_menu(): ?url_select {
+        // When user is on manage subscription, we don't have to show the subscription selector.
+        if ($this->edit === 1 && !\mod_forum\subscriptions::is_forcesubscribed($this->forum)) {
+            return  null;
+        }
+
+        $sesskey = sesskey();
+        $modeset = \mod_forum\subscriptions::get_subscription_mode($this->forum);
+        $optionallink = new moodle_url('/mod/forum/subscribe.php',
+            ['id' => $this->id, 'mode' => FORUM_CHOOSESUBSCRIBE, 'sesskey' => $sesskey, 'edit' => $this->edit]);
+        $forcedlink = new moodle_url('/mod/forum/subscribe.php',
+            ['id' => $this->id, 'mode' => FORUM_FORCESUBSCRIBE, 'sesskey' => $sesskey, 'edit' => $this->edit]);
+        $autolink = new moodle_url('/mod/forum/subscribe.php',
+            ['id' => $this->id, 'mode' => FORUM_INITIALSUBSCRIBE, 'sesskey' => $sesskey, 'edit' => $this->edit]);
+        $disabledlink = new moodle_url('/mod/forum/subscribe.php',
+            ['id' => $this->id, 'mode' => FORUM_DISALLOWSUBSCRIBE, 'sesskey' => $sesskey, 'edit' => $this->edit]);
+
+        $menu = [
+            $optionallink->out(false) => get_string('subscriptionoptional', 'forum'),
+            $forcedlink->out(false) => get_string('subscriptionforced', 'forum'),
+            $autolink->out(false) => get_string('subscriptionauto', 'forum'),
+            $disabledlink->out(false) => get_string('subscriptiondisabled', 'forum'),
+        ];
+
+        switch ($modeset) {
+            case FORUM_CHOOSESUBSCRIBE:
+                $set = get_string('subscriptionoptional', 'forum');
+                break;
+            case FORUM_FORCESUBSCRIBE:
+                $set = get_string('subscriptionforced', 'forum');
+                break;
+            case FORUM_INITIALSUBSCRIBE:
+                $set = get_string('subscriptionauto', 'forum');
+                break;
+            case FORUM_DISALLOWSUBSCRIBE:
+                $set = get_string('subscriptiondisabled', 'forum');
+                break;
+            default:
+                throw new \moodle_exception(get_string('invalidforcesubscribe', 'forum'));
+        }
+
+        $menu = array_filter($menu, function($key) use ($set) {
+            if ($key !== $set) {
+                return true;
+            }
+        });
+        $urlselect = new url_select($menu, $this->currenturl, ['' => $set], 'selectsubscriptionoptions');
+        $urlselect->set_label(get_string('subscriptionmode', 'mod_forum'), ['class' => 'mr-1']);
+        $urlselect->set_help_icon('subscriptionmode', 'mod_forum');
+        $urlselect->class .= ' float-right';
+        return $urlselect;
+    }
+
+    /**
+     * Create view and manage subscribers select menu.
+     *
+     * @return url_select|null get url_select object.
+     */
+    private function create_view_manage_menu(): ?url_select {
+        // If forced subscription is used then no need to show the view.
+        if (\mod_forum\subscriptions::is_forcesubscribed($this->forum)) {
+            return null;
+        }
+
+        $viewlink = new moodle_url('/mod/forum/subscribers.php', ['id' => $this->id, 'edit' => 'off']);
+        $managelink = new moodle_url('/mod/forum/subscribers.php', ['id' => $this->id, 'edit' => 'on']);
+
+        $menu = [
+            $viewlink->out(false) => get_string('forum:viewsubscribers', 'forum'),
+            $managelink->out(false) => get_string('managesubscriptionson', 'forum'),
+        ];
+
+        if ($this->edit === 0) {
+            $this->currenturl = $viewlink;
+        } else {
+            $this->currenturl = $managelink;
+        }
+        $urlselect = new url_select($menu, $this->currenturl->out(false), null, 'selectviewandmanagesubscribers');
+        $urlselect->set_label(get_string('subscribers', 'forum'), ['class' => 'accesshide']);
+        return $urlselect;
+    }
+
+    /**
+     * Data for the template.
+     *
+     * @param renderer_base $output The render_base object.
+     * @return array data for template
+     */
+    public function export_for_template(renderer_base $output): array {
+        $data = [];
+        $subscribeoptionselect = $this->create_subscription_menu();
+        $viewmanageselect = $this->create_view_manage_menu();
+
+        if ($subscribeoptionselect) {
+            $data ['subscriptionoptions'] = $subscribeoptionselect->export_for_template($output);
+        }
+        if ($viewmanageselect) {
+            $data['viewandmanageselect'] = $viewmanageselect->export_for_template($output);
+        }
+        return $data;
+    }
+}