Merge branch 'mdl-76270-master' of https://github.com/matthewhilton/moodle

group/amd/build/grouppicker.min.js

@@ -0,0 +1,9 @@
+define("core_group/grouppicker",["exports"],(function(_exports){Object.defineProperty(_exports,"__esModule",{value:!0}),_exports.default=void 0;return _exports.default=
+/**
+   * @module     core_group/groupPicker
+   * @copyright  2022 Matthew Hilton <matthewhilton@catalyst-au.net>
+   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+   */
+class{constructor(){let elementId=arguments.length>0&&void 0!==arguments[0]?arguments[0]:"groups";const pickerDomElement=document.getElementById(elementId);if(!pickerDomElement)throw new Error("Groups picker was not found.");this.element=pickerDomElement}getDomElement(){return this.element}getSelectedValues(){return Array.from(this.element.querySelectorAll("option:checked")).map((el=>parseInt(el.value)))}},_exports.default}));
+
+//# sourceMappingURL=grouppicker.min.js.map

group/amd/build/grouppicker.min.js.map

@@ -0,0 +1 @@
+{"version":3,"file":"grouppicker.min.js","sources":["../src/grouppicker.js"],"sourcesContent":["// This file is part of Moodle - http://moodle.org/\n//\n// Moodle is free software: you can redistribute it and/or modify\n// it under the terms of the GNU General Public License as published by\n// the Free Software Foundation, either version 3 of the License, or\n// (at your option) any later version.\n//\n// Moodle is distributed in the hope that it will be useful,\n// but WITHOUT ANY WARRANTY; without even the implied warranty of\n// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n// GNU General Public License for more details.\n//\n// You should have received a copy of the GNU General Public License\n// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.\n/**\n * @module     core_group/groupPicker\n * @copyright  2022 Matthew Hilton <matthewhilton@catalyst-au.net>\n * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later\n */\n\n/**\n * Class used for interfacing with the group select picker.\n *\n * @class core_group/GroupPicker\n */\nexport default class GroupPicker {\n    /**\n     * Creates the group picker class and finds the corresponding DOM element.\n     *\n     * @param {String} elementId The DOM element id of the <select> input\n     * @throws Error if the element was not found.\n     */\n    constructor(elementId = \"groups\") {\n        const pickerDomElement = document.getElementById(elementId);\n\n        if (!pickerDomElement) {\n            throw new Error(\"Groups picker was not found.\");\n        }\n\n        this.element = pickerDomElement;\n    }\n\n    /**\n     * Returns the DOM element this class is linked to.\n     *\n     * @returns {HTMLElement} The DOM element\n     */\n    getDomElement() {\n        return this.element;\n    }\n\n    /**\n     * Returns the selected group values.\n     *\n     * @returns {Number[]} The group IDs that are currently selected.\n     */\n    getSelectedValues() {\n        const selectedOptionElements = Array.from(this.element.querySelectorAll(\"option:checked\"));\n        const selectedGroups = selectedOptionElements.map(el => parseInt(el.value));\n\n        return selectedGroups;\n    }\n}\n"],"names":["constructor","elementId","pickerDomElement","document","getElementById","Error","element","getDomElement","this","getSelectedValues","Array","from","querySelectorAll","map","el","parseInt","value"],"mappings":";;;;;;MAgCIA,kBAAYC,iEAAY,eACdC,iBAAmBC,SAASC,eAAeH,eAE5CC,uBACK,IAAIG,MAAM,qCAGfC,QAAUJ,iBAQnBK,uBACWC,KAAKF,QAQhBG,2BACmCC,MAAMC,KAAKH,KAAKF,QAAQM,iBAAiB,mBAC1BC,KAAIC,IAAMC,SAASD,GAAGE"}

group/amd/build/index.min.js

@@ -0,0 +1,8 @@
+define("core_group/index",["exports","./grouppicker"],(function(_exports,_grouppicker){var obj;
+/**
+   * @module     core_group/index
+   * @copyright  2022 Matthew Hilton <matthewhilton@catalyst-au.net>
+   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+   */Object.defineProperty(_exports,"__esModule",{value:!0}),_exports.updateBulkActionButtons=_exports.setElementEnabled=_exports.init=void 0;const groupPicker=new(_grouppicker=(obj=_grouppicker)&&obj.__esModule?obj:{default:obj}).default;_exports.init=()=>{groupPicker.getDomElement().addEventListener("change",updateBulkActionButtons),updateBulkActionButtons()};const updateBulkActionButtons=()=>{const aGroupIsSelected=0!==groupPicker.getSelectedValues().length,bulkActionsEnabledStatuses={enablemessaging:aGroupIsSelected,disablemessaging:aGroupIsSelected};Object.entries(bulkActionsEnabledStatuses).map((_ref=>{let[buttonId,enabled]=_ref;return setElementEnabled(buttonId,enabled)}))};_exports.updateBulkActionButtons=updateBulkActionButtons;const setElementEnabled=(domElementId,enabled)=>{const element=document.getElementById(domElementId);element&&(enabled?element.removeAttribute("disabled"):element.setAttribute("disabled","disabled"))};_exports.setElementEnabled=setElementEnabled}));
+
+//# sourceMappingURL=index.min.js.map

group/amd/build/index.min.js.map

@@ -0,0 +1 @@
+{"version":3,"file":"index.min.js","sources":["../src/index.js"],"sourcesContent":["// This file is part of Moodle - http://moodle.org/\n//\n// Moodle is free software: you can redistribute it and/or modify\n// it under the terms of the GNU General Public License as published by\n// the Free Software Foundation, either version 3 of the License, or\n// (at your option) any later version.\n//\n// Moodle is distributed in the hope that it will be useful,\n// but WITHOUT ANY WARRANTY; without even the implied warranty of\n// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n// GNU General Public License for more details.\n//\n// You should have received a copy of the GNU General Public License\n// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.\n/**\n * @module     core_group/index\n * @copyright  2022 Matthew Hilton <matthewhilton@catalyst-au.net>\n * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later\n */\n\nimport GroupPicker from \"./grouppicker\";\n\nconst groupPicker = new GroupPicker();\n\n/**\n * Initialise page.\n */\nexport const init = () => {\n    // Init event listeners.\n    groupPicker.getDomElement().addEventListener(\"change\", updateBulkActionButtons);\n\n    // Call initially to set initial button state.\n    updateBulkActionButtons();\n};\n\n/**\n * Updates the bulk action buttons depending on specific conditions.\n */\nexport const updateBulkActionButtons = () => {\n    const groupsSelected = groupPicker.getSelectedValues();\n    const aGroupIsSelected = groupsSelected.length !== 0;\n\n    // Collate the conditions where each button is enabled/disabled.\n    const bulkActionsEnabledStatuses = {\n        'enablemessaging': aGroupIsSelected,\n        'disablemessaging': aGroupIsSelected\n    };\n\n    // Update the status of each button.\n    Object.entries(bulkActionsEnabledStatuses).map(([buttonId, enabled]) => setElementEnabled(buttonId, enabled));\n};\n\n/**\n * Adds or removes the given element's disabled attribute.\n * @param {string} domElementId ID of the dom element (without the #)\n * @param {bool} enabled If false, the disable attribute is applied, else it is removed.\n */\nexport const setElementEnabled = (domElementId, enabled) => {\n    const element = document.getElementById(domElementId);\n\n    if (!element) {\n        // If there is no element, we do nothing.\n        // The element could be purposefully hidden or removed.\n        return;\n    }\n\n    if (!enabled) {\n        element.setAttribute('disabled', 'disabled');\n    } else {\n        element.removeAttribute('disabled');\n    }\n};\n"],"names":["groupPicker","getDomElement","addEventListener","updateBulkActionButtons","aGroupIsSelected","getSelectedValues","length","bulkActionsEnabledStatuses","Object","entries","map","_ref","buttonId","enabled","setElementEnabled","domElementId","element","document","getElementById","removeAttribute","setAttribute"],"mappings":";;;;;oJAsBMA,YAAc,6FAKA,KAEhBA,YAAYC,gBAAgBC,iBAAiB,SAAUC,yBAGvDA,iCAMSA,wBAA0B,WAE7BC,iBAA6C,IAD5BJ,YAAYK,oBACKC,OAGlCC,2BAA6B,iBACZH,kCACCA,kBAIxBI,OAAOC,QAAQF,4BAA4BG,KAAIC,WAAEC,SAAUC,qBAAaC,kBAAkBF,SAAUC,4EAQ3FC,kBAAoB,CAACC,aAAcF,iBACtCG,QAAUC,SAASC,eAAeH,cAEnCC,UAMAH,QAGDG,QAAQG,gBAAgB,YAFxBH,QAAQI,aAAa,WAAY"}

group/amd/src/grouppicker.js

@@ -0,0 +1,63 @@
+// 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     core_group/groupPicker
+ * @copyright  2022 Matthew Hilton <matthewhilton@catalyst-au.net>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+/**
+ * Class used for interfacing with the group select picker.
+ *
+ * @class core_group/GroupPicker
+ */
+export default class GroupPicker {
+    /**
+     * Creates the group picker class and finds the corresponding DOM element.
+     *
+     * @param {String} elementId The DOM element id of the <select> input
+     * @throws Error if the element was not found.
+     */
+    constructor(elementId = "groups") {
+        const pickerDomElement = document.getElementById(elementId);
+
+        if (!pickerDomElement) {
+            throw new Error("Groups picker was not found.");
+        }
+
+        this.element = pickerDomElement;
+    }
+
+    /**
+     * Returns the DOM element this class is linked to.
+     *
+     * @returns {HTMLElement} The DOM element
+     */
+    getDomElement() {
+        return this.element;
+    }
+
+    /**
+     * Returns the selected group values.
+     *
+     * @returns {Number[]} The group IDs that are currently selected.
+     */
+    getSelectedValues() {
+        const selectedOptionElements = Array.from(this.element.querySelectorAll("option:checked"));
+        const selectedGroups = selectedOptionElements.map(el => parseInt(el.value));
+
+        return selectedGroups;
+    }
+}

group/amd/src/index.js

@@ -0,0 +1,72 @@
+// 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     core_group/index
+ * @copyright  2022 Matthew Hilton <matthewhilton@catalyst-au.net>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+import GroupPicker from "./grouppicker";
+
+const groupPicker = new GroupPicker();
+
+/**
+ * Initialise page.
+ */
+export const init = () => {
+    // Init event listeners.
+    groupPicker.getDomElement().addEventListener("change", updateBulkActionButtons);
+
+    // Call initially to set initial button state.
+    updateBulkActionButtons();
+};
+
+/**
+ * Updates the bulk action buttons depending on specific conditions.
+ */
+export const updateBulkActionButtons = () => {
+    const groupsSelected = groupPicker.getSelectedValues();
+    const aGroupIsSelected = groupsSelected.length !== 0;
+
+    // Collate the conditions where each button is enabled/disabled.
+    const bulkActionsEnabledStatuses = {
+        'enablemessaging': aGroupIsSelected,
+        'disablemessaging': aGroupIsSelected
+    };
+
+    // Update the status of each button.
+    Object.entries(bulkActionsEnabledStatuses).map(([buttonId, enabled]) => setElementEnabled(buttonId, enabled));
+};
+
+/**
+ * Adds or removes the given element's disabled attribute.
+ * @param {string} domElementId ID of the dom element (without the #)
+ * @param {bool} enabled If false, the disable attribute is applied, else it is removed.
+ */
+export const setElementEnabled = (domElementId, enabled) => {
+    const element = document.getElementById(domElementId);
+
+    if (!element) {
+        // If there is no element, we do nothing.
+        // The element could be purposefully hidden or removed.
+        return;
+    }
+
+    if (!enabled) {
+        element.setAttribute('disabled', 'disabled');
+    } else {
+        element.removeAttribute('disabled');
+    }
+};

group/classes/output/index_page.php

@@ -59,6 +59,9 @@ class index_page implements renderable, templatable {
     /** @var array Groups that can't be deleted by the user. */
     public $undeletablegroups;
 
+    /** @var bool Whether to show/hide the messaging setting buttons. */
+    public $messagingsettingsvisible;
+
     /**
      * index_page constructor.
      *
@@ -69,9 +72,10 @@ class index_page implements renderable, templatable {
      * @param bool $disableaddedit Whether to disable the add members/edit group buttons.
      * @param bool $disabledelete Whether to disable the delete group button.
      * @param array $undeletablegroups Groups that can't be deleted by the user.
+     * @param bool $messagingsettingsvisible If the messaging settings buttons should be visible.
      */
     public function __construct($courseid, $groups, $selectedgroupname, $selectedgroupmembers, $disableaddedit, $disabledelete,
-                                $undeletablegroups) {
+                                $undeletablegroups, $messagingsettingsvisible) {
         $this->courseid = $courseid;
         $this->groups = $groups;
         $this->selectedgroupname = $selectedgroupname;
@@ -79,6 +83,7 @@ class index_page implements renderable, templatable {
         $this->disableaddedit = $disableaddedit;
         $this->disabledelete = $disabledelete;
         $this->undeletablegroups = $undeletablegroups;
+        $this->messagingsettingsvisible = $messagingsettingsvisible;
     }
 
     /**
@@ -105,6 +110,7 @@ class index_page implements renderable, templatable {
         $data->groups = $this->groups;
         $data->members = $this->selectedgroupmembers;
         $data->selectedgroup = $this->selectedgroupname;
+        $data->messagingsettingsvisible = $this->messagingsettingsvisible;
 
         return $data;
     }

group/clientlib.js

@@ -169,7 +169,7 @@ UpdatableMembersCombo.prototype.refreshMembers = function () {
     document.getElementById("deletegroup").disabled = selectionCount == 0;
 
     if(singleSelection) {
-        var sUrl = this.wwwRoot+"/group/index.php?id="+this.courseId+"&group="+groupId+"&act_ajax_getmembersingroup";
+        var sUrl = this.wwwRoot + "/group/index.php?id=" + this.courseId + "&group=" + groupId + "&action=ajax_getmembersingroup";
         var self = this;
         YUI().use('io', function (Y) {
             Y.io(sUrl, {

group/index.php

@@ -28,8 +28,9 @@ require_once('lib.php');
 $courseid = required_param('id', PARAM_INT);
 $groupid  = optional_param('group', false, PARAM_INT);
 $userid   = optional_param('user', false, PARAM_INT);
-$action   = groups_param_action();
-// Support either single group= parameter, or array groups[]
+$action = optional_param('action', false, PARAM_TEXT);
+
+// Support either single group= parameter, or array groups[].
 if ($groupid) {
     $groupids = array($groupid);
 } else {
@@ -40,11 +41,10 @@ $singlegroup = (count($groupids) == 1);
 $returnurl = $CFG->wwwroot.'/group/index.php?id='.$courseid;
 
 // Get the course information so we can print the header and
-// check the course id is valid
+// check the course id is valid.
+$course = $DB->get_record('course', array('id' => $courseid), '*', MUST_EXIST);
 
-$course = $DB->get_record('course', array('id'=>$courseid), '*', MUST_EXIST);
-
-$url = new moodle_url('/group/index.php', array('id'=>$courseid));
+$url = new moodle_url('/group/index.php', array('id' => $courseid));
 navigation_node::override_active_url($url);
 if ($userid) {
     $url->param('user', $userid);
@@ -63,7 +63,7 @@ require_capability('moodle/course:managegroups', $context);
 $PAGE->requires->js('/group/clientlib.js', true);
 $PAGE->requires->js('/group/module.js', true);
 
-// Check for multiple/no group errors
+// Check for multiple/no group errors.
 if (!$singlegroup) {
     switch($action) {
         case 'ajax_getmembersingroup':
@@ -75,7 +75,7 @@ if (!$singlegroup) {
 }
 
 switch ($action) {
-    case false: //OK, display form.
+    case false: // OK, display form.
         break;
 
     case 'ajax_getmembersingroup':
@@ -93,11 +93,11 @@ switch ($action) {
 
             $viewfullnames = has_capability('moodle/site:viewfullnames', $context);
 
-            foreach($groupmemberroles as $roleid=>$roledata) {
+            foreach ($groupmemberroles as $roleid => $roledata) {
                 $shortroledata = new stdClass();
                 $shortroledata->name = $roledata->name;
                 $shortroledata->users = array();
-                foreach($roledata->users as $member) {
+                foreach ($roledata->users as $member) {
                     $shortmember = new stdClass();
                     $shortmember->id = $member->id;
                     $shortmember->name = fullname($member, $viewfullnames);
@@ -123,48 +123,60 @@ switch ($action) {
             throw new \moodle_exception('errorselectsome', 'group', $returnurl);
         }
         $groupidlist = implode(',', $groupids);
-        redirect(new moodle_url('/group/delete.php', array('courseid'=>$courseid, 'groups'=>$groupidlist)));
+        redirect(new moodle_url('/group/delete.php', array('courseid' => $courseid, 'groups' => $groupidlist)));
         break;
 
     case 'showcreateorphangroupform':
-        redirect(new moodle_url('/group/group.php', array('courseid'=>$courseid)));
+        redirect(new moodle_url('/group/group.php', array('courseid' => $courseid)));
         break;
 
     case 'showautocreategroupsform':
-        redirect(new moodle_url('/group/autogroup.php', array('courseid'=>$courseid)));
+        redirect(new moodle_url('/group/autogroup.php', array('courseid' => $courseid)));
         break;
 
     case 'showimportgroups':
-        redirect(new moodle_url('/group/import.php', array('id'=>$courseid)));
+        redirect(new moodle_url('/group/import.php', array('id' => $courseid)));
         break;
 
     case 'showgroupsettingsform':
-        redirect(new moodle_url('/group/group.php', array('courseid'=>$courseid, 'id'=>$groupids[0])));
+        redirect(new moodle_url('/group/group.php', array('courseid' => $courseid, 'id' => $groupids[0])));
         break;
 
-    case 'updategroups': //Currently reloading.
+    case 'updategroups': // Currently reloading.
         break;
 
     case 'removemembers':
         break;
 
     case 'showaddmembersform':
-        redirect(new moodle_url('/group/members.php', array('group'=>$groupids[0])));
+        redirect(new moodle_url('/group/members.php', array('group' => $groupids[0])));
         break;
 
-    case 'updatemembers': //Currently reloading.
+    case 'updatemembers': // Currently reloading.
         break;
 
-    default: //ERROR.
+    case 'enablemessaging':
+        set_groups_messaging($groupids, true);
+        redirect($returnurl, get_string('messagingenabled', 'group', count($groupids)), null,
+            \core\output\notification::NOTIFY_SUCCESS);
+        break;
+
+    case 'disablemessaging':
+        set_groups_messaging($groupids, false);
+        redirect($returnurl, get_string('messagingdisabled', 'group', count($groupids)), null,
+            \core\output\notification::NOTIFY_SUCCESS);
+        break;
+
+    default: // ERROR.
         throw new \moodle_exception('unknowaction', '', $returnurl);
         break;
 }
 
-// Print the page and form
+// Print the page and form.
 $strgroups = get_string('groups');
 $strparticipants = get_string('participants');
 
-/// Print header
+// Print header.
 $PAGE->set_title($strgroups);
 $PAGE->set_heading($course->fullname);
 $PAGE->set_pagelayout('standard');
@@ -244,42 +256,11 @@ if ($singlegroup) {
 
 $disableaddedit = !$singlegroup;
 $disabledelete = !empty($groupids);
+$caneditmessaging = \core_message\api::can_create_group_conversation($USER->id, $context);
+
 $renderable = new \core_group\output\index_page($courseid, $groupoptions, $selectedname, $members, $disableaddedit, $disabledelete,
-        $preventgroupremoval);
+        $preventgroupremoval, $caneditmessaging);
 $output = $PAGE->get_renderer('core_group');
 echo $output->render($renderable);
 
 echo $OUTPUT->footer();
-
-/**
- * Returns the first button action with the given prefix, taken from
- * POST or GET, otherwise returns false.
- * @see /lib/moodlelib.php function optional_param().
- * @param string $prefix 'act_' as in 'action'.
- * @return string The action without the prefix, or false if no action found.
- */
-function groups_param_action($prefix = 'act_') {
-    $action = false;
-//($_SERVER['QUERY_STRING'] && preg_match("/$prefix(.+?)=(.+)/", $_SERVER['QUERY_STRING'], $matches)) { //b_(.*?)[&;]{0,1}/
-
-    if ($_POST) {
-        $form_vars = $_POST;
-    }
-    elseif ($_GET) {
-        $form_vars = $_GET;
-    }
-    if ($form_vars) {
-        foreach ($form_vars as $key => $value) {
-            if (preg_match("/$prefix(.+)/", $key, $matches)) {
-                $action = $matches[1];
-                break;
-            }
-        }
-    }
-    if ($action && !preg_match('/^\w+$/', $action)) {
-        $action = false;
-        throw new \moodle_exception('unknowaction');
-    }
-    ///if (debugging()) echo 'Debug: '.$action;
-    return $action;
-}

group/lib.php

@@ -1208,3 +1208,17 @@ function core_group_inplace_editable($itemtype, $itemid, $newvalue) {
         return \core_group\output\user_groups_editable::update($itemid, $newvalue);
     }
 }
+
+/**
+ * Updates group messaging to enable/disable in bulk.
+ *
+ * @param array $groupids array of group id numbers.
+ * @param bool $enabled if true, enables messaging else disables messaging
+ */
+function set_groups_messaging(array $groupids, bool $enabled): void {
+    foreach ($groupids as $groupid) {
+        $data = groups_get_group($groupid, '*', MUST_EXIST);
+        $data->enablemessaging = $enabled;
+        groups_update_group($data);
+    }
+}

group/templates/index.mustache

@@ -34,6 +34,7 @@
     * groups array The list of groups.
     * members array The list of members, grouped based on roles.
     * undeletablegroups string A JSON string containing an array of group IDs that a user cannot delete.
+    * messagingsettingsvisible bool Wether the messaging settings buttons should be visible.
 
     Example context (json):
     {
@@ -42,6 +43,7 @@
         "editgroupsettingsdisabled": false,
         "deletegroupdisabled": false,
         "addmembersdisabled": false,
+        "messagingenabled": true,
         "groups": [
             {
                 "value": "1",
@@ -91,23 +93,33 @@
                         {{/groups}}
                     </select>
                 </div>
+                <h3> {{#str}} withselected, group {{/str}} </h3>
                 <div class="form-group">
-                    <input type="submit" name="act_updatemembers" id="updatemembers" value="{{#str}}showmembersforgroup, group{{/str}}" class="btn btn-secondary" />
+                    <button type="submit" name="action" id="updatemembers" value="updatemembers" class="btn btn-secondary">{{#str}}showmembersforgroup, group{{/str}}</button>
                 </div>
                 <div class="form-group">
-                    <input type="submit" name="act_showgroupsettingsform" id="showeditgroupsettingsform" value="{{#str}}editgroupsettings, group{{/str}}" {{#editgroupsettingsdisabled}}disabled="disabled"{{/editgroupsettingsdisabled}} class="btn btn-secondary" />
+                    <button type="submit" name="action" id="showeditgroupsettingsform" value="showgroupsettingsform" {{#editgroupsettingsdisabled}}disabled="disabled"{{/editgroupsettingsdisabled}} class="btn btn-secondary">{{#str}}editgroupsettings, group{{/str}}</button>
                 </div>
                 <div class="form-group">
-                    <input type="submit" name="act_deletegroup" id="deletegroup" value="{{#str}}deleteselectedgroup, group{{/str}}" {{#deletegroupdisabled}}disabled="disabled"{{/deletegroupdisabled}} class="btn btn-secondary" />
+                    <button type="submit" name="action" id="deletegroup" value="deletegroup" {{#deletegroupdisabled}}disabled="disabled"{{/deletegroupdisabled}} class="btn btn-secondary">{{#str}}deleteselectedgroup, group{{/str}}</button>
+                </div>
+                {{#messagingsettingsvisible}}
+                    <div class="form-group">
+                        <button type="submit" name="action" id="disablemessaging" value="disablemessaging" class="btn btn-secondary" disabled="disabled">{{#str}}disablemessagingaction, group{{/str}}</button>
+                    </div>
+                    <div class="form-group">
+                        <button type="submit" name="action" id="enablemessaging" value="enablemessaging" class="btn btn-secondary" disabled="disabled">{{#str}}enablemessagingaction, group{{/str}}</button>
+                    </div>
+                {{/messagingsettingsvisible}}
+                <h3> {{#str}} manageactions, group {{/str}} </h3>
+                <div class="form-group">
+                    <button type="submit" name="action" id="showcreateorphangroupform" value="showcreateorphangroupform" class="btn btn-secondary">{{#str}}creategroup, group{{/str}}</button>
                 </div>
                 <div class="form-group">
-                    <input type="submit" name="act_showcreateorphangroupform" id="showcreateorphangroupform" value="{{#str}}creategroup, group{{/str}}" class="btn btn-secondary" />
+                    <button type="submit" name="action" id="showautocreategroupsform" value="showautocreategroupsform" class="btn btn-secondary">{{#str}}autocreategroups, group{{/str}}</button>
                 </div>
                 <div class="form-group">
-                    <input type="submit" name="act_showautocreategroupsform" id="showautocreategroupsform" value="{{#str}}autocreategroups, group{{/str}}" class="btn btn-secondary" />
-                </div>
-                <div class="form-group">
-                    <input type="submit" name="act_showimportgroups" id="showimportgroups" value="{{#str}}importgroups, group{{/str}}" class="btn btn-secondary" />
+                    <button type="submit" name="action" id="showimportgroups" value="showimportgroups" class="btn btn-secondary">{{#str}}importgroups, group{{/str}}</button>
                 </div>
             </div>
             <div class="col-md-6 mb-1">
@@ -127,7 +139,7 @@
                     </select>
                 </div>
                 <div class="form-group">
-                    <input type="submit" value="{{#str}}adduserstogroup, group{{/str}}" class="btn btn-secondary" {{#addmembersdisabled}}disabled="disabled"{{/addmembersdisabled}} name="act_showaddmembersform" id="showaddmembersform"/>
+                    <button type="submit" value="showaddmembersform" class="btn btn-secondary" {{#addmembersdisabled}}disabled="disabled"{{/addmembersdisabled}} name="action" id="showaddmembersform">{{#str}}adduserstogroup, group{{/str}}</button>
                 </div>
             </div>
         </div>
@@ -143,3 +155,6 @@
         M.core_group.groupslist(Y, undeletableGroups);
     });
 {{/js}}
+{{#js}}
+    require(['core_group/index'], (module) => module.init());
+{{/js}}

group/tests/behat/bulk_messaging.feature

@@ -0,0 +1,66 @@
+@core @core_group
+Feature: Bulk update group messaging status
+  In order to update group messaging settings in bulk
+  As a teacher
+  I need to be able to select the groups and update their messaging settings using the buttons provided.
+
+  Background:
+    Given the following "courses" exist:
+        | fullname | shortname | format |
+        | Course 1 | C1        | topics |
+    And the following "users" exist:
+        | username | firstname | lastname | email                |
+        | teacher1 | Teacher   | 1        | teacher1@example.com |
+    And the following "course enrolments" exist:
+        | user     | course | role           |
+        | teacher1 | C1     | editingteacher |
+    And I log in as "teacher1"
+    And I am on the "Course 1" "groups" page
+    And I press "Create group"
+    And I set the following fields to these values:
+        | Group name      | Group-A-Test |
+        | Group ID number | Group-A-Test |
+    And I press "Save changes"
+    And I press "Create group"
+    And I set the following fields to these values:
+        | Group name      | Group-B-Test |
+        | Group ID number | Group-B-Test |
+    And I press "Save changes"
+    And I select "Groups" from the "jump" singleselect
+
+  @javascript
+  Scenario: Bulk enable messaging in groups
+    Given I set the field "groups" to "Group-A-Test (0)"
+    And I press "Edit group settings"
+    And I set the field "id_enablemessaging" to "0"
+    And I press "Save changes"
+    And I wait until the page is ready
+    And the field "groups" matches value "Group-A-Test (0)"
+    And I press "Enable messaging"
+    And I wait until the page is ready
+    And I should see "Successfully enabled messaging in 1 group(s)"
+    And I set the field "groups" to "Group-A-Test (0)"
+    And I press "Edit group settings"
+    Then the field "id_enablemessaging" matches value "1"
+
+  @javascript
+  Scenario: Bulk disable messaging in groups
+    Given I set the field "groups" to "Group-A-Test (0)"
+    And I press "Edit group settings"
+    And I set the field "id_enablemessaging" to "1"
+    And I press "Save changes"
+    And I wait until the page is ready
+    And the field "groups" matches value "Group-A-Test (0)"
+    And I press "Disable messaging"
+    And I wait until the page is ready
+    And I should see "Successfully disabled messaging in 1 group(s)"
+    And I set the field "groups" to "Group-A-Test (0)"
+    And I press "Edit group settings"
+    Then the field "id_enablemessaging" matches value "0"
+
+  @javascript
+  Scenario: Messaging buttons are enabled when a group is selected
+    Given I set the field "groups" to "Group-A-Test (0)"
+    Then the field "groups" matches value "Group-A-Test (0)"
+    And the "Enable messaging" "button" should be enabled
+    And the "Disable messaging" "button" should be enabled

group/tests/behat/delete_groups.feature

@@ -40,11 +40,11 @@ Feature: Automatic deletion of groups and groupings
   @javascript
   Scenario: Delete groups and groupings with and without ID numbers
     Given I set the field "groups" to "Group (without ID) (0)"
-    And I press "Delete selected group"
+    And I press "Delete"
     And I press "Yes"
     Then the "groups" select box should not contain "Group (without ID) (0)"
     And I set the field "groups" to "Group (with ID) (0)"
-    And I press "Delete selected group"
+    And I press "Delete"
     And I press "Yes"
     And the "groups" select box should not contain "Group (with ID) (0)"
     And I select "Groupings" from the "jump" singleselect
@@ -65,9 +65,9 @@ Feature: Automatic deletion of groups and groupings
     And I log in as "teacher1"
     And I am on the "Course 1" "groups" page
     When I set the field "groups" to "Group (with ID) (0)"
-    Then the "Delete selected group" "button" should be disabled
+    Then the "Delete" "button" should be disabled
     And I set the field "groups" to "Group (without ID) (0)"
-    And I press "Delete selected group"
+    And I press "Delete"
     And I press "Yes"
     And I should not see "Group (without ID)"
     And I select "Groupings" from the "jump" singleselect

group/tests/lib_test.php

@@ -789,4 +789,93 @@ class lib_test extends \advanced_testcase {
                 ['prefname' => 'reptile'], 'JOIN {user_preferences} up ON up.userid = u.id');
         $this->assertEquals('snake', reset($result[0]->users)->value);
     }
+
+    /**
+     * Tests set_groups_messaging
+     *
+     * @covers \core_group::set_groups_messaging
+     */
+    public function test_set_groups_messaging() {
+        $this->resetAfterTest();
+        $this->setAdminUser();
+        $dg = $this->getDataGenerator();
+        $course = $dg->create_course();
+
+        // Create some groups in the course.
+        $groupids = [];
+        for ($i = 0; $i < 5; $i++) {
+            $group = new \stdClass();
+            $group->courseid = $course->id;
+            $group->name = 'group-'.$i;
+            $group->enablemessaging = 0;
+            $groupids[] = groups_create_group($group);
+        }
+
+        // They should all initially be disabled.
+        $alldisabledinitially = $this->check_groups_messaging_status_is($groupids, $course->id, false);
+        $this->assertTrue($alldisabledinitially);
+
+        // Enable messaging for all the groups.
+        set_groups_messaging($groupids, true);
+
+        // Check they were all enabled.
+        $allenabled = $this->check_groups_messaging_status_is($groupids, $course->id, true);
+        $this->assertTrue($allenabled);
+
+        // Disable messaging for all the groups.
+        set_groups_messaging($groupids, false);
+
+        // Check they were all disabled.
+        $alldisabled = $this->check_groups_messaging_status_is($groupids, $course->id, false);
+        $this->assertTrue($alldisabled);
+    }
+
+    /**
+     * Tests set group messaging where it doesn't exist
+     *
+     * @covers \core_group::set_groups_messaging
+     */
+    public function test_set_groups_messaging_doesnt_exist() {
+        $this->resetAfterTest();
+        $this->setAdminUser();
+
+        $groupids = [-1];
+
+        $this->expectException('dml_exception');
+        set_groups_messaging($groupids, false);
+    }
+
+    /**
+     * Checks the given list of groups to verify their messaging settings.
+     *
+     * @param array $groupids array of group ids
+     * @param int $courseid the course the groups are in
+     * @param bool $desired the desired setting value
+     * @return bool true if all groups $enablemessaging setting matches the given $desired value, else false
+     */
+    private function check_groups_messaging_status_is(array $groupids, int $courseid, bool $desired) {
+        $context = \context_course::instance($courseid);
+
+        foreach ($groupids as $groupid) {
+            $conversation = \core_message\api::get_conversation_by_area(
+                'core_group',
+                'groups',
+                $groupid,
+                $context->id
+            );
+
+            // An empty conversation means it has not been enabled yet.
+            if (empty($conversation)) {
+                $conversation = (object) [
+                    'enabled' => 0
+                ];
+            }
+
+            if ($desired !== boolval($conversation->enabled)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
 }

lang/en/group.php

@@ -54,11 +54,13 @@ $string['deletegroupconfirm'] = 'Are you sure you want to delete group \'{$a}\'?
 $string['deletegrouping'] = 'Delete grouping';
 $string['deletegroupingconfirm'] = 'Are you sure you want to delete grouping \'{$a}\'? (Groups in the grouping are not deleted.)';
 $string['deletegroupsconfirm'] = 'Are you sure you want to delete the following groups?';
-$string['deleteselectedgroup'] = 'Delete selected group';
+$string['deleteselectedgroup'] = 'Delete';
+$string['disablemessagingaction'] = 'Disable messaging';
 $string['editgroupingsettings'] = 'Edit grouping settings';
 $string['editgroupsettings'] = 'Edit group settings';
 $string['editusersgroupsa'] = 'Edit groups for "{$a}"';
 $string['enablemessaging'] = 'Group messaging';
+$string['enablemessagingaction'] = 'Enable messaging';
 $string['enablemessaging_help'] = 'If enabled, group members can send messages to the others in their group via the messaging drawer.';
 $string['encoding'] = 'Encoding';
 $string['enrolmentkey'] = 'Enrolment key';
@@ -171,6 +173,9 @@ $string['nousersinrole'] = 'There are no suitable users in the selected role';
 $string['number'] = 'Group/member count';
 $string['numgroups'] = 'Number of groups';
 $string['nummembers'] = 'Members per group';
+$string['manageactions'] = 'Manage';
+$string['messagingdisabled'] = 'Successfully disabled messaging in {$a} group(s)';
+$string['messagingenabled'] = 'Successfully enabled messaging in {$a} group(s)';
 $string['mygroups'] = 'My groups';
 $string['othergroups'] = 'Other groups';
 $string['overview'] = 'Overview';
@@ -216,3 +221,4 @@ $string['visibilitymembers'] = 'Only visible to members';
 $string['visibilityown'] = 'Only see own membership';
 $string['visibilitynone'] = 'Hidden';
 $string['memberofgroup'] = 'Group member of: {$a}';
+$string['withselected'] = 'With selected';