MDL-66268 forumreport_summary: Add filters handling incl groups filter

Part of MDL-66076.

mod/forum/report/summary/amd/build/filters.min.js

@@ -0,0 +1,2 @@
+define ("forumreport_summary/filters",["exports","jquery","core/popper"],function(a,b,c){"use strict";Object.defineProperty(a,"__esModule",{value:!0});a.init=void 0;b=d(b);c=d(c);function d(a){return a&&a.__esModule?a:{default:a}}var e=function(a){a=(0,b.default)(a);(0,b.default)(document).ready(function(){(0,b.default)(".loading-icon").hide();(0,b.default)("#summaryreport").removeClass("hidden")});(0,b.default)(a).on("click",".filter-clear",function(a){var b=a.target.parentNode.parentNode.parentElement.querySelectorAll("input[type=\"checkbox\"]:checked");b.forEach(function(a){a.checked=!1})});var d=function(a){var c=(0,b.default)("#filtersform").attr("action");if(a){a.preventDefault();var d=a.target.search.substr(1);c+="&"+d}(0,b.default)("#filtersform").attr("action",c);(0,b.default)("#filtersform").submit()};(0,b.default)(".resettable").on("click","a",function(a){d(a)});(0,b.default)("thead").on("click","a",function(a){d(a)});(0,b.default)(".pagination").on("click","a",function(a){d(a)});var e=function(a){var b=document.getElementById(a),c=b.querySelectorAll("input[type=\"checkbox\"]:not(:checked)");c.forEach(function(a){a.checked=!0})};(0,b.default)("#filter-groups-popover .select-all").on("click",function(){e("filter-groups-popover")});(0,b.default)("#filter-groups-button").on("click",function(){var a=document.querySelector("#filter-groups-button"),d=document.querySelector("#filter-groups-popover");new c.default(a,d,{placement:"bottom"});(0,b.default)("#filter-groups-popover").removeClass("hidden")});(0,b.default)(a).on("click","#filter-groups-popover .filter-save",function(){(0,b.default)("#filter-groups-popover").addClass("hidden");d(!1)})};a.init=e});
+//# sourceMappingURL=filters.min.js.map

mod/forum/report/summary/amd/src/filters.js

@@ -0,0 +1,117 @@
+// 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/>.
+
+/**
+ * Module responsible for handling forum summary report filters.
+ *
+ * @module     forumreport_summary/filters
+ * @package    forumreport_summary
+ * @copyright  2019 Michael Hawkins <michaelh@moodle.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+import $ from 'jquery';
+import Popper from 'core/popper';
+
+export const init = (root) => {
+    root = $(root);
+
+    // Hide loading spinner and show report once page is ready.
+    // This ensures filters can be applied when sorting by columns.
+    $(document).ready(function() {
+        $('.loading-icon').hide();
+        $('#summaryreport').removeClass('hidden');
+    });
+
+    // Generic filter handlers.
+
+    // Event handler to clear filters.
+    $(root).on("click", ".filter-clear", function(event) {
+        // Clear checkboxes.
+        let selected = event.target.parentNode.parentNode.parentElement.querySelectorAll('input[type="checkbox"]:checked');
+
+        selected.forEach(function(checkbox) {
+            checkbox.checked = false;
+        });
+    });
+
+    // Called to override click event to trigger a proper generate request with filtering.
+    var generateWithFilters = (event) => {
+        var newLink = $('#filtersform').attr('action');
+
+        if (event) {
+            event.preventDefault();
+
+            let filterParams = event.target.search.substr(1);
+            newLink += '&' + filterParams;
+        }
+
+        $('#filtersform').attr('action', newLink);
+        $('#filtersform').submit();
+    };
+
+    // Override 'reset table preferences' so it generates with filters.
+    $('.resettable').on("click", "a", function(event) {
+        generateWithFilters(event);
+    });
+
+    // Override table heading sort links so they generate with filters.
+    $('thead').on("click", "a", function(event) {
+        generateWithFilters(event);
+    });
+
+    // Override pagination page links so they generate with filters.
+    $('.pagination').on("click", "a", function(event) {
+        generateWithFilters(event);
+    });
+
+    // Select all checkboxes within a filter section.
+    var selectAll = (checkboxdiv) => {
+        let targetdiv = document.getElementById(checkboxdiv);
+        let deselected = targetdiv.querySelectorAll('input[type="checkbox"]:not(:checked)');
+
+        deselected.forEach(function(checkbox) {
+            checkbox.checked = true;
+        });
+    };
+
+    // Groups filter specific handlers.
+
+    // Event to handle select all groups.
+    $('#filter-groups-popover .select-all').on('click', function() {
+        selectAll('filter-groups-popover');
+    });
+
+    // Event handler for showing groups filter popover.
+    $('#filter-groups-button').on('click', function() {
+        // Create popover.
+        var referenceElement = document.querySelector('#filter-groups-button'),
+            popperContent = document.querySelector('#filter-groups-popover');
+
+        new Popper(referenceElement, popperContent, {placement: 'bottom'});
+
+        // Show popover.
+        $('#filter-groups-popover').removeClass('hidden');
+    });
+
+    // Event handler to save groups filter.
+    $(root).on("click", "#filter-groups-popover .filter-save", function() {
+        // Close the popover.
+        $('#filter-groups-popover').addClass('hidden');
+
+        // Submit the filter values and re-generate report.
+        generateWithFilters(false);
+    });
+};

mod/forum/report/summary/classes/output/filters.php

@@ -0,0 +1,169 @@
+<?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 summary report filters renderable.
+ *
+ * @package    forumreport_summary
+ * @copyright  2019 Michael Hawkins <michaelh@moodle.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace forumreport_summary\output;
+
+use moodle_url;
+use renderable;
+use renderer_base;
+use stdClass;
+use templatable;
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Forum summary report filters renderable.
+ *
+ * @copyright  2019 Michael Hawkins <michaelh@moodle.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class filters implements renderable, templatable {
+
+    /**
+     * Course module the report is being run within.
+     *
+     * @var stdClass $cm
+     */
+    protected $cm;
+
+    /**
+     * Moodle URL used as the form action on the generate button.
+     *
+     * @var moodle_url $actionurl
+     */
+    protected $actionurl;
+
+    /**
+     * Details of groups available for filtering.
+     * Stored in the format groupid => groupname.
+     *
+     * @var array $groupsavailable
+     */
+    protected $groupsavailable = [];
+
+    /**
+     * IDs of groups selected for filtering.
+     *
+     * @var array $groupsselected
+     */
+    protected $groupsselected = [];
+
+    /**
+     * Builds renderable filter data.
+     *
+     * @param stdClass $cm The course module object.
+     * @param moodle_url $actionurl The form action URL.
+     * @param array $filterdata (optional) Associative array of data that has been set on available filters, if any,
+     *                                      in the format filtertype => [values]
+     */
+    public function __construct(stdClass $cm, moodle_url $actionurl, array $filterdata = []) {
+        $this->cm = $cm;
+        $this->actionurl = $actionurl;
+
+        // Prepare groups filter data.
+        $groupsdata = $filterdata['groups'] ?? [];
+        $this->prepare_groups_data($groupsdata);
+    }
+
+    /**
+     * Prepares groups data and sets relevant property values.
+     *
+     * @param array $groupsdata Groups selected for filtering.
+     * @return void.
+     */
+    protected function prepare_groups_data(array $groupsdata): void {
+        $groupsavailable = [];
+        $groupsselected = [];
+
+        // Only fetch groups user has access to.
+        $groups = groups_get_activity_allowed_groups($this->cm);
+
+        // Include a 'no groups' option if groups exist.
+        if (!empty($groups)) {
+            $nogroups = new stdClass();
+            $nogroups->id = -1;
+            $nogroups->name = get_string('groupsnone');
+            array_push($groups, $nogroups);
+        }
+
+        foreach ($groups as $group) {
+            $groupsavailable[$group->id] = $group->name;
+
+            // Select provided groups if they are available.
+            if (in_array($group->id, $groupsdata)) {
+                $groupsselected[] = $group->id;
+            }
+        }
+
+        // Overwrite groups properties.
+        $this->groupsavailable = $groupsavailable;
+        $this->groupsselected = $groupsselected;
+    }
+
+
+    /**
+     * Export data for use as the context of a mustache template.
+     *
+     * @param renderer_base $renderer The renderer to be used to display report filters.
+     * @return array Data in a format compatible with a mustache template.
+     */
+    public function export_for_template(renderer_base $renderer): stdClass {
+        $output = new stdClass();
+
+        // Set formaction URL.
+        $output->actionurl = $this->actionurl->out(false);
+
+        // Set groups filter data.
+        if (!empty($this->groupsavailable)) {
+            $output->hasgroups = true;
+
+            $groupscount = count($this->groupsselected);
+
+            if (count($this->groupsavailable) <= $groupscount) {
+                $output->filtergroupsname = get_string('filter:groupscountall', 'forumreport_summary');
+            } else if (!empty($this->groupsselected)) {
+                $output->filtergroupsname = get_string('filter:groupscountnumber', 'forumreport_summary', $groupscount);
+            } else {
+                $output->filtergroupsname = get_string('filter:groupsname', 'forumreport_summary');
+            }
+
+            // Set groups filter.
+            $groupsdata = [];
+
+            foreach ($this->groupsavailable as $groupid => $groupname) {
+                $groupsdata[] = [
+                    'groupid' => $groupid,
+                    'groupname' => $groupname,
+                    'checked' => in_array($groupid, $this->groupsselected),
+                ];
+            }
+
+            $output->filtergroups = $groupsdata;
+        } else {
+            $output->hasgroups = false;
+        }
+
+        return $output;
+    }
+}

mod/forum/report/summary/classes/summary_table.php

@@ -41,6 +41,9 @@ class summary_table extends table_sql {
     /** Forum filter type */
     const FILTER_FORUM = 1;
 
+    /** Groups filter type */
+    const FILTER_GROUPS = 2;
+
     /** @var \stdClass The various SQL segments that will be combined to form queries to fetch various information. */
     public $sql;
 
@@ -53,25 +56,36 @@ class summary_table extends table_sql {
     /** @var int The forum ID being reported on. */
     protected $forumid;
 
+    /** @var \stdClass The course module object of the forum being reported on. */
+    protected $cm;
+
     /**
      * @var int The user ID if only one user's summary will be generated.
      * This will apply to users without permission to view others' summaries.
      */
     protected $userid;
 
+    /**
+     * @var bool Whether the table should be overridden to show the 'nothing to display' message.
+     * False unless checks confirm there will be nothing to display.
+     */
+    protected $nothingtodisplay = false;
+
     /**
      * Forum report table constructor.
      *
      * @param int $courseid The ID of the course the forum(s) exist within.
-     * @param int $forumid The ID of the forum being summarised.
+     * @param array $filters Report filters in the format 'type' => [values].
      */
-    public function __construct(int $courseid, int $forumid) {
+    public function __construct(int $courseid, array $filters) {
         global $USER;
 
+        $forumid = $filters['forums'][0];
+
         parent::__construct("summaryreport_{$courseid}_{$forumid}");
 
-        $cm = get_coursemodule_from_instance('forum', $forumid, $courseid);
-        $context = \context_module::instance($cm->id);
+        $this->cm = get_coursemodule_from_instance('forum', $forumid, $courseid);
+        $context = \context_module::instance($this->cm->id);
 
         // Only show their own summary unless they have permission to view all.
         if (!has_capability('forumreport/summary:viewall', $context)) {
@@ -98,8 +112,8 @@ class summary_table extends table_sql {
         // Define the basic SQL data and object format.
         $this->define_base_sql();
 
-        // Set the forum ID.
-        $this->add_filter(self::FILTER_FORUM, [$forumid]);
+        // Apply relevant filters.
+        $this->apply_filters($filters);
     }
 
     /**
@@ -111,6 +125,7 @@ class summary_table extends table_sql {
     public function get_filter_name(int $filtertype): string {
         $filternames = [
             self::FILTER_FORUM => 'Forum',
+            self::FILTER_GROUPS => 'Groups',
         ];
 
         return $filternames[$filtertype];
@@ -232,6 +247,8 @@ class summary_table extends table_sql {
      * @throws coding_exception
      */
     public function add_filter(int $filtertype, array $values = []): void {
+        global $DB;
+
         $paramcounterror = false;
 
         switch($filtertype) {
@@ -248,6 +265,68 @@ class summary_table extends table_sql {
 
                 break;
 
+            case self::FILTER_GROUPS:
+                // Find total number of options available (groups plus 'no groups').
+                $availablegroups = groups_get_activity_allowed_groups($this->cm);
+                $alloptionscount = 1 + count($availablegroups);
+
+                // Skip adding filter if not applied, or all options are selected.
+                if (!empty($values) && count($values) < $alloptionscount) {
+                    // Include users without groups if that option (-1) is selected.
+                    $nonekey = array_search(-1, $values, true);
+
+                    // Users within selected groups or not in any groups are included.
+                    if ($nonekey !== false && count($values) > 1) {
+                        unset($values[$nonekey]);
+                        list($groupidin, $groupidparams) = $DB->get_in_or_equal($values, SQL_PARAMS_NAMED, 'groupid');
+
+                        // No select fields required.
+                        // No joins required (handled by where to prevent data duplication).
+                        $this->sql->filterwhere .= "
+                            AND (u.id =
+                                (SELECT gm.userid
+                                   FROM {groups_members} gm
+                                  WHERE gm.userid = u.id
+                                    AND gm.groupid {$groupidin}
+                               GROUP BY gm.userid
+                                  LIMIT 1)
+                            OR
+                                (SELECT nogm.userid
+                                   FROM mdl_groups_members nogm
+                                  WHERE nogm.userid = u.id
+                               GROUP BY nogm.userid
+                                  LIMIT 1)
+                            IS NULL)";
+                        $this->sql->params += $groupidparams;
+
+                    } else if ($nonekey !== false) {
+                        // Only users within no groups are included.
+                        unset($values[$nonekey]);
+
+                        // No select fields required.
+                        $this->sql->filterfromjoins .= " LEFT JOIN {groups_members} nogm ON nogm.userid = u.id";
+                        $this->sql->filterwhere .= " AND nogm.id IS NULL";
+
+                    } else if (!empty($values)) {
+                        // Only users within selected groups are included.
+                        list($groupidin, $groupidparams) = $DB->get_in_or_equal($values, SQL_PARAMS_NAMED, 'groupid');
+
+                        // No select fields required.
+                        // No joins required (handled by where to prevent data duplication).
+                        $this->sql->filterwhere .= "
+                            AND u.id = (
+                                 SELECT gm.userid
+                                   FROM {groups_members} gm
+                                  WHERE gm.userid = u.id
+                                    AND gm.groupid {$groupidin}
+                               GROUP BY gm.userid
+                                  LIMIT 1)";
+                        $this->sql->params += $groupidparams;
+                    }
+                }
+
+                break;
+
             default:
                 throw new coding_exception("Report filter type '{$filtertype}' not found.");
                 break;
@@ -361,6 +440,12 @@ class summary_table extends table_sql {
     public function out($pagesize, $useinitialsbar, $downloadhelpbutton = ''): void {
         global $DB;
 
+        // If there is nothing to display, print the relevant string and return, no further action is required.
+        if ($this->nothingtodisplay) {
+            $this->print_nothing_to_display();
+            return;
+        }
+
         if (!$this->columns) {
             $sql = $this->get_full_sql();
 
@@ -378,6 +463,20 @@ class summary_table extends table_sql {
         $this->finish_output();
     }
 
+    /**
+     * Apply the relevant filters to the report.
+     *
+     * @param array $filters Report filters in the format 'type' => [values].
+     * @return void.
+     */
+    protected function apply_filters(array $filters): void {
+        // Apply the forums filter.
+        $this->add_filter(self::FILTER_FORUM, $filters['forums']);
+
+        // Apply groups filter.
+        $this->add_filter(self::FILTER_GROUPS, $filters['groups']);
+    }
+
     /**
      * Prepares a complete SQL statement from the base query and any filters defined.
      *

mod/forum/report/summary/index.php

@@ -31,6 +31,12 @@ if (isguestuser()) {
 $courseid = required_param('courseid', PARAM_INT);
 $forumid = required_param('forumid', PARAM_INT);
 $perpage = optional_param('perpage', 25, PARAM_INT);
+$filters = [];
+
+// Establish filter values.
+$filters['forums'] = [$forumid];
+$filters['groups'] = optional_param_array('filtergroups', [], PARAM_INT);
+
 $cm = null;
 $modinfo = get_fast_modinfo($courseid);
 
@@ -47,9 +53,9 @@ if ($forumid > 0) {
 }
 
 require_login($courseid, false, $cm);
+$context = \context_module::instance($cm->id);
 
 // This capability is required to view any version of the report.
-$context = \context_module::instance($cm->id);
 if (!has_capability("forumreport/summary:view", $context)) {
     $redirecturl = new moodle_url("/mod/forum/view.php");
     $redirecturl->param('id', $forumid);
@@ -73,7 +79,11 @@ $PAGE->set_heading($course->fullname);
 echo $OUTPUT->header();
 echo $OUTPUT->heading(get_string('summarytitle', 'forumreport_summary', $forumname), 2, 'p-b-2');
 
-$table = new \forumreport_summary\summary_table($courseid, $forumid);
-$table->baseurl = $url;
-$table->out($perpage, false);
+// Render the report filters form.
+$renderer = $PAGE->get_renderer('forumreport_summary');
+echo $renderer->render_filters_form($cm, $url, $filters);
+
+// Prepare and display the report.
+echo $renderer->render_report($courseid, $url, $filters, $perpage);
+
 echo $OUTPUT->footer();

mod/forum/report/summary/lang/en/forumreport_summary.php

@@ -24,6 +24,9 @@
 
 $string['attachmentcount'] = 'Number of attachments';
 $string['earliestpost'] = 'Earliest post';
+$string['filter:groupsname'] = 'Groups';
+$string['filter:groupscountall'] = 'Groups (all)';
+$string['filter:groupscountnumber'] = 'Groups ({$a})';
 $string['latestpost'] = 'Most recent post';
 $string['nodetitle'] = 'Summary report';
 $string['pluginname'] = 'Forum summary report';

mod/forum/report/summary/renderer.php

@@ -0,0 +1,76 @@
+<?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/>.
+
+/**
+ * Provides rendering functionality for the forum summary report subplugin.
+ *
+ * @package   forumreport_summary
+ * @copyright 2019 Michael Hawkins <michaelh@moodle.com>
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Renderer for the forum summary report.
+ *
+ * @copyright  2019 Michael Hawkins <michaelh@moodle.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class forumreport_summary_renderer extends plugin_renderer_base {
+
+    /**
+     * Render the filters available for the forum summary report.
+     *
+     * @param stdClass $cm The course module object.
+     * @param moodle_url $actionurl The form action URL.
+     * @param array $filters Optional array of currently applied filter values.
+     * @return string The filter form HTML.
+     */
+    public function render_filters_form(stdClass $cm, moodle_url $actionurl, array $filters = []): string {
+        $renderable = new \forumreport_summary\output\filters($cm, $actionurl, $filters);
+        $templatecontext = $renderable->export_for_template($this);
+
+        return $this->render_from_template('forumreport_summary/filters', $templatecontext);
+    }
+
+    /**
+     * Render the summary report table.
+     *
+     * @param int $courseid ID of the course where the forum is located.
+     * @param string $url Base URL for the report page.
+     * @param array $filters Values of filters to be applied.
+     * @param int $perpage Number of results to render per page.
+     * @return string The report table HTML.
+     */
+    public function render_report($courseid, $url, $filters, $perpage) {
+        // Initialise table.
+        $table = new \forumreport_summary\summary_table($courseid, $filters);
+        $table->baseurl = $url;
+
+        // Buffer so calling script can output the report as required.
+        ob_start();
+
+        // Render table.
+        $table->out($perpage, false);
+
+        $tablehtml = ob_get_contents();
+
+        ob_end_clean();
+
+        return $this->render_from_template('forumreport_summary/report', ['tablehtml' => $tablehtml, 'placeholdertext' => false]);
+    }
+}

mod/forum/report/summary/templates/filters.mustache

@@ -0,0 +1,81 @@
+{{!
+    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 forumreport_summary/filters
+
+    Summary report filters.
+
+    Example context (json):
+    {
+        "actionurl": "https://mymoodlesite.com/mod/forum/report/summary/index.php?courseid=2&forumid=2&perpage=50",
+        "hasgroups": true,
+        "filtergroupsname" : "Groups (all)",
+        "filtergroups": [
+            {
+                "gropuid": "1",
+                "groupname": "Group A",
+                "checked": true
+            },
+            {
+                "gropuid": "3",
+                "groupname": "Group C",
+                "checked": false
+            }
+        ]
+    }
+}}
+
+<div class="p-b-3" data-report-id="{{uniqid}}">
+    <form id="filtersform" name="filtersform" method="post" action="{{actionurl}}">
+        <input type="hidden" name="submitted" value="true">
+        <div id="filtersbuttons">
+            {{#hasgroups}}
+            <button type="button" id="filter-groups-button" class="btn btn-primary filter-button">
+                {{filtergroupsname}}
+            </button>
+
+            {{! Start groups filter popover}}
+            <div id="filter-groups-popover" class="popover m-t-1 hidden">
+                <h3 class="filter-header">{{# str}} filter:groupsname, forumreport_summary {{/ str}}</h3>
+                <div class="filter-body">
+                    <div class="form-check filter-scrollable">
+                        {{#filtergroups}}
+                        <input id="filtergroups{{groupid}}" class="form-check-input" type="checkbox" name="filtergroups[]"
+                            value="{{groupid}}" {{#checked}} checked="checked" {{/checked}}>
+                        <label class="form-check-label pt-1" for="filtergroups{{groupid}}">{{groupname}}</label>
+                        <br>
+                        {{/filtergroups}}
+                        <br>
+                    </div>
+                    <a href="#"><span class="select-all">{{# str}} selectall {{/ str}}</span></a>
+                    <div class="float-right">
+                        <a href="#"><span class="filter-clear p-1">{{# str}} clear {{/ str}}</span></a>
+                        <a href="#"><span class="filter-save"><strong>{{# str}} save {{/ str}}</strong></span></a>
+                    </div>
+                </div>
+            </div>
+            {{! End groups filter popover}}
+            {{/hasgroups}}
+        </div>
+    </form>
+</div>
+
+{{#js}}
+require(['forumreport_summary/filters'], function(Filters) {
+    Filters.init(document.querySelector("[data-report-id='{{uniqid}}']"));
+});
+{{/js}}

mod/forum/report/summary/templates/report.mustache

@@ -0,0 +1,39 @@
+{{!
+    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 forumreport_summary/report
+
+    Summary report filters.
+
+    Example context (json):
+    {
+        "placeholdertext": "To generate the summary report, set any filter values required, then select \"Generate report\".",
+        "tablehtml": false
+    }
+}}
+
+{{! The placeholder text, used before the report has been generated }}
+{{^tablehtml}}<div class='d-block p-b-10'><h3>{{placeholdertext}}</h3></div>{{/tablehtml}}
+
+{{#tablehtml}}
+    <div class="text-center">
+        {{> core/loading }}
+    </div>
+    <div id="summaryreport" class="hidden">
+        {{{tablehtml}}}
+    </div>
+{{/tablehtml}}

mod/forum/report/summary/version.php

@@ -24,6 +24,6 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$plugin->version  = 2019082000;
+$plugin->version  = 2019090200;
 $plugin->requires = 2019071900;
 $plugin->component = 'forumreport_summary';