diff --git a/group/classes/reportbuilder/datasource/groups.php b/group/classes/reportbuilder/datasource/groups.php
new file mode 100644
index 00000000000..c9391c31a38
--- /dev/null
+++ b/group/classes/reportbuilder/datasource/groups.php
@@ -0,0 +1,138 @@
+<?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/>.
+
+declare(strict_types=1);
+
+namespace core_group\reportbuilder\datasource;
+
+use core_group\reportbuilder\local\entities\{grouping, group, group_member};
+use core_reportbuilder\datasource;
+use core_reportbuilder\local\entities\{course, user};
+use core_reportbuilder\local\helpers\database;
+
+/**
+ * Groups datasource
+ *
+ * @package     core_group
+ * @copyright   2022 Paul Holden <paulh@moodle.com>
+ * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class groups extends datasource {
+
+    /**
+     * Return user friendly name of the datasource
+     *
+     * @return string
+     */
+    public static function get_name(): string {
+        return get_string('groups', 'core_group');
+    }
+
+    /**
+     * Initialise report
+     */
+    protected function initialise(): void {
+        $courseentity = new course();
+        $coursealias = $courseentity->get_table_alias('course');
+
+        $this->set_main_table('course', $coursealias);
+        $this->add_entity($courseentity);
+
+        $paramsiteid = database::generate_param_name();
+        $this->add_base_condition_sql("{$coursealias}.id != :{$paramsiteid}", [$paramsiteid => SITEID]);
+
+        // Re-use the context table alias/join from the course entity in subsequent entities.
+        $contextalias = $courseentity->get_table_alias('context');
+        $this->add_join($courseentity->get_context_join());
+
+        // Group entity.
+        $groupentity = (new group())
+            ->set_table_alias('context', $contextalias);
+        $groupsalias = $groupentity->get_table_alias('groups');
+        $this->add_entity($groupentity
+            ->add_join("LEFT JOIN {groups} {$groupsalias} ON {$groupsalias}.courseid = {$coursealias}.id"));
+
+        // Grouping entity.
+        $groupingentity = (new grouping())
+            ->set_table_alias('context', $contextalias);
+        $groupingsalias = $groupingentity->get_table_alias('groupings');
+
+        // Sub-select for all groupings groups.
+        $groupinginnerselect = "
+            SELECT gr.*, grg.groupid
+              FROM {groupings} gr
+              JOIN {groupings_groups} grg ON grg.groupingid = gr.id";
+
+        $this->add_entity($groupingentity
+            ->add_joins($groupentity->get_joins())
+            ->add_join("LEFT JOIN ({$groupinginnerselect}) {$groupingsalias}
+                ON {$groupingsalias}.courseid = {$coursealias}.id AND {$groupingsalias}.groupid = {$groupsalias}.id"));
+
+        // Group member entity.
+        $groupmemberentity = new group_member();
+        $groupsmembersalias = $groupmemberentity->get_table_alias('groups_members');
+        $this->add_entity($groupmemberentity
+            ->add_joins($groupentity->get_joins())
+            ->add_join("LEFT JOIN {groups_members} {$groupsmembersalias} ON {$groupsmembersalias}.groupid = {$groupsalias}.id"));
+
+        // User entity.
+        $userentity = new user();
+        $useralias = $userentity->get_table_alias('user');
+        $this->add_entity($userentity
+            ->add_joins($groupmemberentity->get_joins())
+            ->add_join("LEFT JOIN {user} {$useralias} ON {$useralias}.id = {$groupsmembersalias}.userid"));
+
+        // Add all elements from entities to be available in custom reports.
+        $this->add_all_from_entities();
+    }
+
+    /**
+     * Return the columns that will be added to the report as part of default setup
+     *
+     * @return string[]
+     */
+    public function get_default_columns(): array {
+        return [
+            'course:coursefullnamewithlink',
+            'group:name',
+            'user:fullname',
+        ];
+    }
+
+    /**
+     * Return the filters that will be added to the report as part of default setup
+     *
+     * @return string[]
+     */
+    public function get_default_filters(): array {
+        return [
+            'course:fullname',
+            'group:name',
+        ];
+    }
+
+    /**
+     * Return the conditions that will be added to the report as part of default setup
+     *
+     * @return string[]
+     */
+    public function get_default_conditions(): array {
+        return [
+            'course:fullname',
+            'group:name',
+        ];
+    }
+}
diff --git a/group/classes/reportbuilder/local/entities/group.php b/group/classes/reportbuilder/local/entities/group.php
new file mode 100644
index 00000000000..9858a97f1ac
--- /dev/null
+++ b/group/classes/reportbuilder/local/entities/group.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/>.
+
+declare(strict_types=1);
+
+namespace core_group\reportbuilder\local\entities;
+
+use context_course;
+use context_helper;
+use html_writer;
+use lang_string;
+use moodle_url;
+use stdClass;
+use core_reportbuilder\local\entities\base;
+use core_reportbuilder\local\filters\{date, text};
+use core_reportbuilder\local\helpers\format;
+use core_reportbuilder\local\report\{column, filter};
+
+/**
+ * Group entity
+ *
+ * @package     core_group
+ * @copyright   2022 Paul Holden <paulh@moodle.com>
+ * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class group extends base {
+
+    /**
+     * Database tables that this entity uses and their default aliases
+     *
+     * @return array
+     */
+    protected function get_default_table_aliases(): array {
+        return [
+            'context' => 'gctx',
+            'groups' => 'g',
+        ];
+    }
+
+    /**
+     * The default title for this entity
+     *
+     * @return lang_string
+     */
+    protected function get_default_entity_title(): lang_string {
+        return new lang_string('group', 'core_group');
+    }
+
+    /**
+     * Initialise the entity
+     *
+     * @return base
+     */
+    public function initialise(): base {
+        $columns = $this->get_all_columns();
+        foreach ($columns as $column) {
+            $this->add_column($column);
+        }
+
+        // All the filters defined by the entity can also be used as conditions.
+        $filters = $this->get_all_filters();
+        foreach ($filters as $filter) {
+            $this
+                ->add_filter($filter)
+                ->add_condition($filter);
+        }
+
+        return $this;
+    }
+
+    /**
+     * Returns list of all available columns
+     *
+     * @return column[]
+     */
+    protected function get_all_columns(): array {
+        global $DB;
+
+        $contextalias = $this->get_table_alias('context');
+        $groupsalias = $this->get_table_alias('groups');
+
+        // Name column.
+        $columns[] = (new column(
+            'name',
+            new lang_string('name'),
+            $this->get_entity_name()
+        ))
+            ->add_joins($this->get_joins())
+            ->set_type(column::TYPE_TEXT)
+            ->add_fields("{$groupsalias}.name, {$groupsalias}.courseid")
+            ->add_fields(context_helper::get_preload_record_columns_sql($contextalias))
+            ->set_is_sortable(true)
+            ->set_callback(static function($name, stdClass $group): string {
+                if ($name === null) {
+                    return '';
+                }
+
+                context_helper::preload_from_record($group);
+                $context = context_course::instance($group->courseid);
+
+                return format_string($group->name, true, ['context' => $context]);
+            });
+
+        // ID number column.
+        $columns[] = (new column(
+            'idnumber',
+            new lang_string('idnumber'),
+            $this->get_entity_name()
+        ))
+            ->add_joins($this->get_joins())
+            ->set_type(column::TYPE_TEXT)
+            ->add_fields("{$groupsalias}.idnumber")
+            ->set_is_sortable(true);
+
+        // Description column.
+        $descriptionfieldsql = "{$groupsalias}.description";
+        if ($DB->get_dbfamily() === 'oracle') {
+            $descriptionfieldsql = $DB->sql_order_by_text($descriptionfieldsql, 1024);
+        }
+        $columns[] = (new column(
+            'description',
+            new lang_string('description'),
+            $this->get_entity_name()
+        ))
+            ->add_joins($this->get_joins())
+            ->set_type(column::TYPE_LONGTEXT)
+            ->add_field($descriptionfieldsql, 'description')
+            ->add_fields("{$groupsalias}.descriptionformat, {$groupsalias}.id, {$groupsalias}.courseid")
+            ->add_fields(context_helper::get_preload_record_columns_sql($contextalias))
+            ->set_is_sortable(false)
+            ->set_callback(static function(?string $description, stdClass $group): string {
+                global $CFG;
+
+                if ($description === null) {
+                    return '';
+                }
+
+                require_once("{$CFG->libdir}/filelib.php");
+
+                context_helper::preload_from_record($group);
+                $context = context_course::instance($group->courseid);
+
+                $description = file_rewrite_pluginfile_urls($description, 'pluginfile.php', $context->id, 'group',
+                    'description', $group->id);
+
+                return format_text($description, $group->descriptionformat, ['context' => $context]);
+            });
+
+        // Enrolment key column.
+        $columns[] = (new column(
+            'enrolmentkey',
+            new lang_string('enrolmentkey', 'core_group'),
+            $this->get_entity_name()
+        ))
+            ->add_joins($this->get_joins())
+            ->set_type(column::TYPE_TEXT)
+            ->add_fields("{$groupsalias}.enrolmentkey")
+            ->set_is_sortable(true);
+
+        // Picture column.
+        $columns[] = (new column(
+            'picture',
+            new lang_string('picture'),
+            $this->get_entity_name()
+        ))
+            ->add_joins($this->get_joins())
+            ->set_type(column::TYPE_INTEGER)
+            ->add_fields("{$groupsalias}.picture, {$groupsalias}.id, {$contextalias}.id AS contextid")
+            ->set_is_sortable(false)
+            // It doesn't make sense to offer integer aggregation methods for this column.
+            ->set_disabled_aggregation(['avg', 'max', 'min', 'sum'])
+            ->set_callback(static function ($picture, stdClass $group): string {
+                if (empty($group->picture)) {
+                    return '';
+                }
+
+                $pictureurl = moodle_url::make_pluginfile_url($group->contextid, 'group', 'icon', $group->id, '/', 'f2');
+                $pictureurl->param('rev', $group->picture);
+
+                return html_writer::img($pictureurl, '');
+            });
+
+        // Time created column.
+        $columns[] = (new column(
+            'timecreated',
+            new lang_string('timecreated', 'core_reportbuilder'),
+            $this->get_entity_name()
+        ))
+            ->add_joins($this->get_joins())
+            ->set_type(column::TYPE_TIMESTAMP)
+            ->add_fields("{$groupsalias}.timecreated")
+            ->set_is_sortable(true)
+            ->set_callback([format::class, 'userdate']);
+
+        // Time modified column.
+        $columns[] = (new column(
+            'timemodified',
+            new lang_string('timemodified', 'core_reportbuilder'),
+            $this->get_entity_name()
+        ))
+            ->add_joins($this->get_joins())
+            ->set_type(column::TYPE_TIMESTAMP)
+            ->add_fields("{$groupsalias}.timemodified")
+            ->set_is_sortable(true)
+            ->set_callback([format::class, 'userdate']);
+
+        return $columns;
+    }
+
+    /**
+     * Return list of all available filters
+     *
+     * @return filter[]
+     */
+    protected function get_all_filters(): array {
+        $groupsalias = $this->get_table_alias('groups');
+
+        // Name filter.
+        $filters[] = (new filter(
+            text::class,
+            'name',
+            new lang_string('name'),
+            $this->get_entity_name(),
+            "{$groupsalias}.name"
+        ))
+            ->add_joins($this->get_joins());
+
+        // ID number filter.
+        $filters[] = (new filter(
+            text::class,
+            'idnumber',
+            new lang_string('idnumber'),
+            $this->get_entity_name(),
+            "{$groupsalias}.idnumber"
+        ))
+            ->add_joins($this->get_joins());
+
+        // Time created filter.
+        $filters[] = (new filter(
+            date::class,
+            'timecreated',
+            new lang_string('timecreated', 'core_reportbuilder'),
+            $this->get_entity_name(),
+            "{$groupsalias}.timecreated"
+        ))
+            ->add_joins($this->get_joins());
+
+        return $filters;
+    }
+}
diff --git a/group/classes/reportbuilder/local/entities/group_member.php b/group/classes/reportbuilder/local/entities/group_member.php
new file mode 100644
index 00000000000..0139bee11ef
--- /dev/null
+++ b/group/classes/reportbuilder/local/entities/group_member.php
@@ -0,0 +1,132 @@
+<?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/>.
+
+declare(strict_types=1);
+
+namespace core_group\reportbuilder\local\entities;
+
+use core_reportbuilder\local\filters\date;
+use lang_string;
+use core_reportbuilder\local\entities\base;
+use core_reportbuilder\local\helpers\format;
+use core_reportbuilder\local\report\{column, filter};
+
+/**
+ * Group member entity
+ *
+ * @package     core_group
+ * @copyright   2022 Paul Holden <paulh@moodle.com>
+ * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class group_member extends base {
+
+    /**
+     * Database tables that this entity uses and their default aliases
+     *
+     * @return array
+     */
+    protected function get_default_table_aliases(): array {
+        return [
+            'groups_members' => 'gm',
+        ];
+    }
+
+    /**
+     * The default title for this entity
+     *
+     * @return lang_string
+     */
+    protected function get_default_entity_title(): lang_string {
+        return new lang_string('groupmember', 'core_group');
+    }
+
+    /**
+     * Initialise the entity
+     *
+     * @return base
+     */
+    public function initialise(): base {
+        $columns = $this->get_all_columns();
+        foreach ($columns as $column) {
+            $this->add_column($column);
+        }
+
+        // All the filters defined by the entity can also be used as conditions.
+        $filters = $this->get_all_filters();
+        foreach ($filters as $filter) {
+            $this
+                ->add_filter($filter)
+                ->add_condition($filter);
+        }
+
+        return $this;
+    }
+
+    /**
+     * Returns list of all available columns
+     *
+     * @return column[]
+     */
+    protected function get_all_columns(): array {
+        $groupsmembersalias = $this->get_table_alias('groups_members');
+
+        // Time added column.
+        $columns[] = (new column(
+            'timeadded',
+            new lang_string('timeadded', 'core_reportbuilder'),
+            $this->get_entity_name()
+        ))
+            ->add_joins($this->get_joins())
+            ->set_type(column::TYPE_TIMESTAMP)
+            ->add_fields("{$groupsmembersalias}.timeadded")
+            ->set_is_sortable(true)
+            ->set_callback([format::class, 'userdate']);
+
+        // Component column.
+        $columns[] = (new column(
+            'component',
+            new lang_string('plugin', 'core'),
+            $this->get_entity_name()
+        ))
+            ->add_joins($this->get_joins())
+            ->set_type(column::TYPE_TEXT)
+            ->add_fields("{$groupsmembersalias}.component")
+            ->set_is_sortable(true);
+
+        return $columns;
+    }
+
+    /**
+     * Return list of all available filters
+     *
+     * @return filter[]
+     */
+    protected function get_all_filters(): array {
+        $groupsmembersalias = $this->get_table_alias('groups_members');
+
+        // Time added filter.
+        $filters[] = (new filter(
+            date::class,
+            'timeadded',
+            new lang_string('timeadded', 'core_reportbuilder'),
+            $this->get_entity_name(),
+            "{$groupsmembersalias}.timeadded"
+        ))
+            ->add_joins($this->get_joins());
+
+        return $filters;
+    }
+}
diff --git a/group/classes/reportbuilder/local/entities/grouping.php b/group/classes/reportbuilder/local/entities/grouping.php
new file mode 100644
index 00000000000..10a4a991944
--- /dev/null
+++ b/group/classes/reportbuilder/local/entities/grouping.php
@@ -0,0 +1,227 @@
+<?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/>.
+
+declare(strict_types=1);
+
+namespace core_group\reportbuilder\local\entities;
+
+use context_course;
+use context_helper;
+use lang_string;
+use stdClass;
+use core_reportbuilder\local\entities\base;
+use core_reportbuilder\local\filters\{date, text};
+use core_reportbuilder\local\helpers\format;
+use core_reportbuilder\local\report\{column, filter};
+
+/**
+ * Group member entity
+ *
+ * @package     core_group
+ * @copyright   2022 Paul Holden <paulh@moodle.com>
+ * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class grouping extends base {
+
+    /**
+     * Database tables that this entity uses and their default aliases
+     *
+     * @return array
+     */
+    protected function get_default_table_aliases(): array {
+        return [
+            'context' => 'ggctx',
+            'groupings' => 'gg',
+        ];
+    }
+
+    /**
+     * The default title for this entity
+     *
+     * @return lang_string
+     */
+    protected function get_default_entity_title(): lang_string {
+        return new lang_string('grouping', 'core_group');
+    }
+
+    /**
+     * Initialise the entity
+     *
+     * @return base
+     */
+    public function initialise(): base {
+        $columns = $this->get_all_columns();
+        foreach ($columns as $column) {
+            $this->add_column($column);
+        }
+
+        // All the filters defined by the entity can also be used as conditions.
+        $filters = $this->get_all_filters();
+        foreach ($filters as $filter) {
+            $this
+                ->add_filter($filter)
+                ->add_condition($filter);
+        }
+
+        return $this;
+    }
+
+    /**
+     * Returns list of all available columns
+     *
+     * @return column[]
+     */
+    protected function get_all_columns(): array {
+        global $DB;
+
+        $contextalias = $this->get_table_alias('context');
+        $groupingsalias = $this->get_table_alias('groupings');
+
+        // Name column.
+        $columns[] = (new column(
+            'name',
+            new lang_string('name'),
+            $this->get_entity_name()
+        ))
+            ->add_joins($this->get_joins())
+            ->set_type(column::TYPE_TEXT)
+            ->add_fields("{$groupingsalias}.name, {$groupingsalias}.courseid")
+            ->add_fields(context_helper::get_preload_record_columns_sql($contextalias))
+            ->set_is_sortable(true)
+            ->set_callback(static function($name, stdClass $grouping): string {
+                if ($name === null) {
+                    return '';
+                }
+
+                context_helper::preload_from_record($grouping);
+                $context = context_course::instance($grouping->courseid);
+
+                return format_string($grouping->name, true, ['context' => $context]);
+            });
+
+        // ID number column.
+        $columns[] = (new column(
+            'idnumber',
+            new lang_string('idnumber'),
+            $this->get_entity_name()
+        ))
+            ->add_joins($this->get_joins())
+            ->set_type(column::TYPE_TEXT)
+            ->add_fields("{$groupingsalias}.idnumber")
+            ->set_is_sortable(true);
+
+        // Description column.
+        $descriptionfieldsql = "{$groupingsalias}.description";
+        if ($DB->get_dbfamily() === 'oracle') {
+            $descriptionfieldsql = $DB->sql_order_by_text($descriptionfieldsql, 1024);
+        }
+        $columns[] = (new column(
+            'description',
+            new lang_string('description'),
+            $this->get_entity_name()
+        ))
+            ->add_joins($this->get_joins())
+            ->set_type(column::TYPE_LONGTEXT)
+            ->add_field($descriptionfieldsql, 'description')
+            ->add_fields("{$groupingsalias}.descriptionformat, {$groupingsalias}.id, {$groupingsalias}.courseid")
+            ->add_fields(context_helper::get_preload_record_columns_sql($contextalias))
+            ->set_is_sortable(false)
+            ->set_callback(static function(?string $description, stdClass $grouping): string {
+                global $CFG;
+
+                if ($description === null) {
+                    return '';
+                }
+
+                require_once("{$CFG->libdir}/filelib.php");
+
+                context_helper::preload_from_record($grouping);
+                $context = context_course::instance($grouping->courseid);
+
+                $description = file_rewrite_pluginfile_urls($description, 'pluginfile.php', $context->id, 'grouping',
+                    'description', $grouping->id);
+
+                return format_text($description, $grouping->descriptionformat, ['context' => $context]);
+            });
+
+        // Time created column.
+        $columns[] = (new column(
+            'timecreated',
+            new lang_string('timecreated', 'core_reportbuilder'),
+            $this->get_entity_name()
+        ))
+            ->add_joins($this->get_joins())
+            ->set_type(column::TYPE_TIMESTAMP)
+            ->add_fields("{$groupingsalias}.timecreated")
+            ->set_is_sortable(true)
+            ->set_callback([format::class, 'userdate']);
+
+        // Time modified column.
+        $columns[] = (new column(
+            'timemodified',
+            new lang_string('timemodified', 'core_reportbuilder'),
+            $this->get_entity_name()
+        ))
+            ->add_joins($this->get_joins())
+            ->set_type(column::TYPE_TIMESTAMP)
+            ->add_fields("{$groupingsalias}.timemodified")
+            ->set_is_sortable(true)
+            ->set_callback([format::class, 'userdate']);
+
+        return $columns;
+    }
+
+    /**
+     * Return list of all available filters
+     *
+     * @return filter[]
+     */
+    protected function get_all_filters(): array {
+        $groupingsalias = $this->get_table_alias('groupings');
+
+        // Name filter.
+        $filters[] = (new filter(
+            text::class,
+            'name',
+            new lang_string('name'),
+            $this->get_entity_name(),
+            "{$groupingsalias}.name"
+        ))
+            ->add_joins($this->get_joins());
+
+        // ID number filter.
+        $filters[] = (new filter(
+            text::class,
+            'idnumber',
+            new lang_string('idnumber'),
+            $this->get_entity_name(),
+            "{$groupingsalias}.idnumber"
+        ))
+            ->add_joins($this->get_joins());
+
+        // Time created filter.
+        $filters[] = (new filter(
+            date::class,
+            'timecreated',
+            new lang_string('timecreated', 'core_reportbuilder'),
+            $this->get_entity_name(),
+            "{$groupingsalias}.timecreated"
+        ))
+            ->add_joins($this->get_joins());
+
+        return $filters;
+    }
+}
diff --git a/group/tests/reportbuilder/datasource/groups_test.php b/group/tests/reportbuilder/datasource/groups_test.php
new file mode 100644
index 00000000000..2338babc7d6
--- /dev/null
+++ b/group/tests/reportbuilder/datasource/groups_test.php
@@ -0,0 +1,355 @@
+<?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/>.
+
+declare(strict_types=1);
+
+namespace core_group\reportbuilder\datasource;
+
+use core_reportbuilder_generator;
+use core_reportbuilder_testcase;
+use core_reportbuilder\local\filters\{date, text};
+
+defined('MOODLE_INTERNAL') || die();
+
+global $CFG;
+require_once("{$CFG->dirroot}/reportbuilder/tests/helpers.php");
+
+/**
+ * Unit tests for groups datasource
+ *
+ * @package     core_group
+ * @covers      \core_group\reportbuilder\datasource\groups
+ * @copyright   2022 Paul Holden <paulh@moodle.com>
+ * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class groups_test extends core_reportbuilder_testcase {
+
+    /**
+     * Test default datasource
+     */
+    public function test_datasource_default(): void {
+        $this->resetAfterTest();
+
+        $course = $this->getDataGenerator()->create_course();
+        $user = $this->getDataGenerator()->create_and_enrol($course, 'student');
+
+        $group = $this->getDataGenerator()->create_group(['courseid' => $course->id]);
+        $this->getDataGenerator()->create_group_member(['userid' => $user->id, 'groupid' => $group->id]);
+
+        /** @var core_reportbuilder_generator $generator */
+        $generator = $this->getDataGenerator()->get_plugin_generator('core_reportbuilder');
+        $report = $generator->create_report(['name' => 'Groups', 'source' => groups::class, 'default' => 1]);
+
+        $content = $this->get_custom_report_content($report->get('id'));
+        $this->assertCount(1, $content);
+
+        $contentrow = array_values(reset($content));
+        $this->assertEquals([
+            "<a href=\"https://www.example.com/moodle/course/view.php?id={$course->id}\">{$course->fullname}</a>", // Course.
+            $group->name, // Group.
+            fullname($user), // User.
+        ], $contentrow);
+    }
+
+    /**
+     * Test datasource groupings reports
+     */
+    public function test_datasource_groupings(): void {
+        $this->resetAfterTest();
+
+        $course = $this->getDataGenerator()->create_course();
+
+        // Create group, add to grouping.
+        $groupone = $this->getDataGenerator()->create_group(['courseid' => $course->id, 'name' => 'Group A']);
+        $grouping = $this->getDataGenerator()->create_grouping(['courseid' => $course->id]);
+        $this->getDataGenerator()->create_grouping_group(['groupingid' => $grouping->id, 'groupid' => $groupone->id]);
+
+        // Create second group, no grouping.
+        $grouptwo = $this->getDataGenerator()->create_group(['courseid' => $course->id, 'name' => 'Group B']);
+
+        /** @var core_reportbuilder_generator $generator */
+        $generator = $this->getDataGenerator()->get_plugin_generator('core_reportbuilder');
+        $report = $generator->create_report(['name' => 'Groups', 'source' => groups::class, 'default' => 0]);
+
+        $generator->create_column(['reportid' => $report->get('id'), 'uniqueidentifier' => 'course:fullname']);
+        $generator->create_column(['reportid' => $report->get('id'), 'uniqueidentifier' => 'grouping:name']);
+        $generator->create_column(['reportid' => $report->get('id'), 'uniqueidentifier' => 'group:name'])
+            ->set('sortenabled', true)->update();
+
+        $content = $this->get_custom_report_content($report->get('id'));
+        $this->assertCount(2, $content);
+
+        $this->assertEquals([
+            [
+                $course->fullname,
+                $grouping->name,
+                $groupone->name,
+            ],
+            [
+                $course->fullname,
+                null,
+                $grouptwo->name,
+            ],
+        ], array_map('array_values', $content));
+    }
+
+    /**
+     * Test datasource columns that aren't added by default
+     */
+    public function test_datasource_non_default_columns(): void {
+        $this->resetAfterTest();
+
+        $course = $this->getDataGenerator()->create_course();
+        $user = $this->getDataGenerator()->create_and_enrol($course, 'student');
+
+        $group = $this->getDataGenerator()->create_group(['courseid' => $course->id, 'idnumber' => 'G101', 'enrolmentkey' => 'S',
+            'description' => 'My group']);
+        $this->getDataGenerator()->create_group_member(['userid' => $user->id, 'groupid' => $group->id]);
+
+        $grouping = $this->getDataGenerator()->create_grouping(['courseid' => $course->id, 'idnumber' => 'GR101',
+            'description' => 'My grouping']);
+        $this->getDataGenerator()->create_grouping_group(['groupingid' => $grouping->id, 'groupid' => $group->id]);
+
+        /** @var core_reportbuilder_generator $generator */
+        $generator = $this->getDataGenerator()->get_plugin_generator('core_reportbuilder');
+        $report = $generator->create_report(['name' => 'Groups', 'source' => groups::class, 'default' => 0]);
+
+        // Course (just to test join).
+        $generator->create_column(['reportid' => $report->get('id'), 'uniqueidentifier' => 'course:shortname']);
+
+        // Group.
+        $generator->create_column(['reportid' => $report->get('id'), 'uniqueidentifier' => 'group:idnumber']);
+        $generator->create_column(['reportid' => $report->get('id'), 'uniqueidentifier' => 'group:description']);
+        $generator->create_column(['reportid' => $report->get('id'), 'uniqueidentifier' => 'group:enrolmentkey']);
+        $generator->create_column(['reportid' => $report->get('id'), 'uniqueidentifier' => 'group:picture']);
+        $generator->create_column(['reportid' => $report->get('id'), 'uniqueidentifier' => 'group:timecreated']);
+        $generator->create_column(['reportid' => $report->get('id'), 'uniqueidentifier' => 'group:timemodified']);
+
+        // Grouping.
+        $generator->create_column(['reportid' => $report->get('id'), 'uniqueidentifier' => 'grouping:name']);
+        $generator->create_column(['reportid' => $report->get('id'), 'uniqueidentifier' => 'grouping:idnumber']);
+        $generator->create_column(['reportid' => $report->get('id'), 'uniqueidentifier' => 'grouping:description']);
+        $generator->create_column(['reportid' => $report->get('id'), 'uniqueidentifier' => 'grouping:timecreated']);
+        $generator->create_column(['reportid' => $report->get('id'), 'uniqueidentifier' => 'grouping:timemodified']);
+
+        // Group member.
+        $generator->create_column(['reportid' => $report->get('id'), 'uniqueidentifier' => 'group_member:timeadded']);
+        $generator->create_column(['reportid' => $report->get('id'), 'uniqueidentifier' => 'group_member:component']);
+
+        // User (just to test join).
+        $generator->create_column(['reportid' => $report->get('id'), 'uniqueidentifier' => 'user:username']);
+
+        $content = $this->get_custom_report_content($report->get('id'));
+        $this->assertCount(1, $content);
+
+        [
+            $courseshortname,
+            $groupidnumber,
+            $groupdescription,
+            $groupenrolmentkey,
+            $grouppicture,
+            $grouptimecreated,
+            $grouptimemodified,
+            $groupingname,
+            $groupingidnumber,
+            $groupingdescription,
+            $groupingtimecreated,
+            $groupingtimemodified,
+            $groupmembertimeadded,
+            $groupmemebercomponent,
+            $userusername,
+        ] = array_values($content[0]);
+
+        $this->assertEquals($course->shortname, $courseshortname);
+        $this->assertEquals('G101', $groupidnumber);
+        $this->assertEquals(format_text($group->description), $groupdescription);
+        $this->assertEquals('S', $groupenrolmentkey);
+        $this->assertEmpty($grouppicture);
+        $this->assertNotEmpty($grouptimecreated);
+        $this->assertNotEmpty($grouptimemodified);
+        $this->assertEquals($grouping->name, $groupingname);
+        $this->assertEquals('GR101', $groupingidnumber);
+        $this->assertEquals(format_text($grouping->description), $groupingdescription);
+        $this->assertNotEmpty($groupingtimecreated);
+        $this->assertNotEmpty($groupingtimemodified);
+        $this->assertNotEmpty($groupmembertimeadded);
+        $this->assertEmpty($groupmemebercomponent);
+        $this->assertEquals($user->username, $userusername);
+    }
+
+    /**
+     * Data provider for {@see test_datasource_filters}
+     *
+     * @return array[]
+     */
+    public function datasource_filters_provider(): array {
+        return [
+            // Course (just to test join).
+            'Filter course name' => ['course:fullname', [
+                'course:fullname_operator' => text::IS_EQUAL_TO,
+                'course:fullname_value' => 'Test course',
+            ], true],
+            'Filter course name (no match)' => ['course:fullname', [
+                'course:fullname_operator' => text::IS_NOT_EQUAL_TO,
+                'course:fullname_value' => 'Test course',
+            ], false],
+
+            // Group.
+            'Filter group name' => ['group:name', [
+                'group:name_operator' => text::IS_EQUAL_TO,
+                'group:name_value' => 'Test group',
+            ], true],
+            'Filter group name (no match)' => ['group:name', [
+                'group:name_operator' => text::IS_NOT_EQUAL_TO,
+                'group:name_value' => 'Test group',
+            ], false],
+            'Filter group idnumber' => ['group:idnumber', [
+                'group:idnumber_operator' => text::IS_EQUAL_TO,
+                'group:idnumber_value' => 'G101',
+            ], true],
+            'Filter group idnumber (no match)' => ['group:idnumber', [
+                'group:idnumber_operator' => text::IS_NOT_EQUAL_TO,
+                'group:idnumber_value' => 'G101',
+            ], false],
+            'Filter group time created' => ['group:timecreated', [
+                'group:timecreated_operator' => date::DATE_RANGE,
+                'group:timecreated_from' => 1622502000,
+            ], true],
+            'Filter group time created (no match)' => ['group:timecreated', [
+                'group:timecreated_operator' => date::DATE_RANGE,
+                'group:timecreated_to' => 1622502000,
+            ], false],
+
+            // Grouping.
+            'Filter grouping name' => ['grouping:name', [
+                'grouping:name_operator' => text::IS_EQUAL_TO,
+                'grouping:name_value' => 'Test grouping',
+            ], true],
+            'Filter grouping name (no match)' => ['grouping:name', [
+                'grouping:name_operator' => text::IS_NOT_EQUAL_TO,
+                'grouping:name_value' => 'Test grouping',
+            ], false],
+            'Filter grouping idnumber' => ['grouping:idnumber', [
+                'grouping:idnumber_operator' => text::IS_EQUAL_TO,
+                'grouping:idnumber_value' => 'GR101',
+            ], true],
+            'Filter grouping idnumber (no match)' => ['grouping:idnumber', [
+                'grouping:idnumber_operator' => text::IS_NOT_EQUAL_TO,
+                'grouping:idnumber_value' => 'GR101',
+            ], false],
+            'Filter grouping time created' => ['grouping:timecreated', [
+                'grouping:timecreated_operator' => date::DATE_RANGE,
+                'grouping:timecreated_from' => 1622502000,
+            ], true],
+            'Filter grouping time created (no match)' => ['grouping:timecreated', [
+                'grouping:timecreated_operator' => date::DATE_RANGE,
+                'grouping:timecreated_to' => 1622502000,
+            ], false],
+
+            // Group member.
+            'Filter group member time added' => ['group_member:timeadded', [
+                'group_member:timeadded_operator' => date::DATE_RANGE,
+                'group_member:timeadded_from' => 1622502000,
+            ], true],
+            'Filter group member time added (no match)' => ['group_member:timeadded', [
+                'group_member:timeadded_operator' => date::DATE_RANGE,
+                'group_member:timeadded_to' => 1622502000,
+            ], false],
+
+            // User (just to test join).
+            'Filter user username' => ['user:username', [
+                'user:username_operator' => text::IS_EQUAL_TO,
+                'user:username_value' => 'testuser',
+            ], true],
+            'Filter user username (no match)' => ['user:username', [
+                'user:username_operator' => text::IS_NOT_EQUAL_TO,
+                'user:username_value' => 'testuser',
+            ], false],
+        ];
+    }
+
+    /**
+     * Test datasource filters
+     *
+     * @param string $filtername
+     * @param array $filtervalues
+     * @param bool $expectmatch
+     *
+     * @dataProvider datasource_filters_provider
+     */
+    public function test_datasource_filters(
+        string $filtername,
+        array $filtervalues,
+        bool $expectmatch
+    ): void {
+        $this->resetAfterTest();
+
+        $course = $this->getDataGenerator()->create_course(['fullname' => 'Test course']);
+        $user = $this->getDataGenerator()->create_and_enrol($course, 'student', ['username' => 'testuser']);
+
+        $group = $this->getDataGenerator()->create_group(['courseid' => $course->id, 'idnumber' => 'G101', 'name' => 'Test group']);
+        $this->getDataGenerator()->create_group_member(['userid' => $user->id, 'groupid' => $group->id]);
+
+        $grouping = $this->getDataGenerator()->create_grouping(['courseid' => $course->id, 'idnumber' => 'GR101',
+            'name' => 'Test grouping']);
+        $this->getDataGenerator()->create_grouping_group(['groupingid' => $grouping->id, 'groupid' => $group->id]);
+
+        /** @var core_reportbuilder_generator $generator */
+        $generator = $this->getDataGenerator()->get_plugin_generator('core_reportbuilder');
+
+        // Create report containing single column, and given filter.
+        $report = $generator->create_report(['name' => 'Tasks', 'source' => groups::class, 'default' => 0]);
+        $generator->create_column(['reportid' => $report->get('id'), 'uniqueidentifier' => 'group:idnumber']);
+
+        // Add filter, set it's values.
+        $generator->create_filter(['reportid' => $report->get('id'), 'uniqueidentifier' => $filtername]);
+        $content = $this->get_custom_report_content($report->get('id'), 0, $filtervalues);
+
+        if ($expectmatch) {
+            $this->assertCount(1, $content);
+            $this->assertEquals('G101', reset($content[0]));
+        } else {
+            $this->assertEmpty($content);
+        }
+    }
+
+    /**
+     * Stress test datasource
+     *
+     * In order to execute this test PHPUNIT_LONGTEST should be defined as true in phpunit.xml or directly in config.php
+     */
+    public function test_stress_datasource(): void {
+        if (!PHPUNIT_LONGTEST) {
+            $this->markTestSkipped('PHPUNIT_LONGTEST is not defined');
+        }
+
+        $this->resetAfterTest();
+
+        $course = $this->getDataGenerator()->create_course(['fullname' => 'Test course']);
+        $user = $this->getDataGenerator()->create_and_enrol($course, 'student', ['username' => 'testuser']);
+
+        $group = $this->getDataGenerator()->create_group(['courseid' => $course->id, 'idnumber' => 'G101', 'name' => 'Test group']);
+        $this->getDataGenerator()->create_group_member(['userid' => $user->id, 'groupid' => $group->id]);
+
+        $grouping = $this->getDataGenerator()->create_grouping(['courseid' => $course->id, 'idnumber' => 'GR101',
+            'name' => 'Test grouping']);
+        $this->getDataGenerator()->create_grouping_group(['groupingid' => $grouping->id, 'groupid' => $group->id]);
+
+        $this->datasource_stress_test_columns(groups::class);
+        $this->datasource_stress_test_columns_aggregation(groups::class);
+        $this->datasource_stress_test_conditions(groups::class, 'group:idnumber');
+    }
+}
diff --git a/lang/en/moodle.php b/lang/en/moodle.php
index c767cc1a21b..380b585ee8e 100644
--- a/lang/en/moodle.php
+++ b/lang/en/moodle.php
@@ -1649,6 +1649,7 @@ $string['phone'] = 'Phone';
 $string['phone1'] = 'Phone';
 $string['phone2'] = 'Mobile phone';
 $string['phpinfo'] = 'PHP info';
+$string['picture'] = 'Picture';
 $string['pictureof'] = 'Picture of {$a}';
 $string['pictureofuser'] = 'User picture';
 $string['placeholdertypeorselect'] = 'Type or select...';
diff --git a/reportbuilder/classes/local/entities/course.php b/reportbuilder/classes/local/entities/course.php
index f9a533742a4..c0824d702e7 100644
--- a/reportbuilder/classes/local/entities/course.php
+++ b/reportbuilder/classes/local/entities/course.php
@@ -116,6 +116,20 @@ class course extends base {
         return $this;
     }
 
+    /**
+     * Return syntax for joining on the context table
+     *
+     * @return string
+     */
+    public function get_context_join(): string {
+        $coursealias = $this->get_table_alias('course');
+        $contextalias = $this->get_table_alias('context');
+
+        return "LEFT JOIN {context} {$contextalias}
+            ON {$contextalias}.contextlevel = " . CONTEXT_COURSE . "
+           AND {$contextalias}.instanceid = {$coursealias}.id";
+    }
+
     /**
      * Course fields.
      *
@@ -258,11 +272,7 @@ class course extends base {
 
             // Join on the context table so that we can use it for formatting these columns later.
             if ($key === 'coursefullnamewithlink') {
-                $join = "LEFT JOIN {context} {$contexttablealias}
-                           ON {$contexttablealias}.contextlevel = " . CONTEXT_COURSE . "
-                          AND {$contexttablealias}.instanceid = {$tablealias}.id";
-
-                $column->add_join($join)
+                $column->add_join($this->get_context_join())
                     ->add_fields(context_helper::get_preload_record_columns_sql($contexttablealias));
             }
 
@@ -290,11 +300,7 @@ class course extends base {
 
             // Join on the context table so that we can use it for formatting these columns later.
             if ($coursefield === 'summary' || $coursefield === 'shortname' || $coursefield === 'fullname') {
-                $join = "LEFT JOIN {context} {$contexttablealias}
-                           ON {$contexttablealias}.contextlevel = " . CONTEXT_COURSE . "
-                          AND {$contexttablealias}.instanceid = {$tablealias}.id";
-
-                $column->add_join($join)
+                $column->add_join($this->get_context_join())
                     ->add_field("{$tablealias}.id", 'courseid')
                     ->add_fields(context_helper::get_preload_record_columns_sql($contexttablealias));
             }