MDL-62554 tool_dataprivacy: Allow setting of activity defaults

* Allow the setting of data registry defaults for activity modules.
* Rewrite the defaults page so that it uses templates.
* Use a tabbed layout for the defaults page that shows the default
  category and purpose per context level.
* New API and web service functions that enables the setting of the
  defaults.

admin/tool/dataprivacy/amd/build/defaultsactions.min.js

@@ -0,0 +1 @@
+define(["jquery","core/ajax","core/notification","core/str","core/modal_factory","core/modal_events","core/templates"],function(a,b,c,d,e,f,g){function h(b,d,h,j,k,l,m,n){null!==h&&l.forEach(function(a){a.id===h&&(a.selected=!0)}),null!==j&&m.forEach(function(a){a.id===j&&(a.selected=!0)});var o={contextlevel:d,categoryoptions:l,purposeoptions:m};null!==n&&n.length&&(null===k?o.newactivitydefaults=!0:n.forEach(function(a){k===a.name&&(a.selected=!0)}),o.modemodule=!0,o.activityoptions=n),e.create({title:b,body:g.render("tool_dataprivacy/category_purpose_form",o),type:e.types.SAVE_CANCEL,large:!0}).then(function(b){return b.getRoot().on(f.save,function(){var b=a("#activity"),c="undefined"!=typeof b?b.val():null,d=a("#override"),e="undefined"!=typeof d&&d.is(":checked");i(a("#contextlevel").val(),a("#category").val(),a("#purpose").val(),c,e)}),b.getRoot().on(f.hidden,function(){b.destroy()}),b.show(),b})["catch"](c.exception)}function i(a,c,d,e,f){var g={methodname:"tool_dataprivacy_set_context_defaults",args:{contextlevel:a,category:c,purpose:d,override:f,activity:e}};b.call([g])[0].done(function(a){a.result&&window.location.reload()})}var j={EDIT_LEVEL_DEFAULTS:'[data-action="edit-level-defaults"]',NEW_ACTIVITY_DEFAULTS:'[data-action="new-activity-defaults"]',EDIT_ACTIVITY_DEFAULTS:'[data-action="edit-activity-defaults"]',DELETE_ACTIVITY_DEFAULTS:'[data-action="delete-activity-defaults"]'},k=-1,l=function(){this.registerEvents()};return l.prototype.registerEvents=function(){a(j.EDIT_LEVEL_DEFAULTS).click(function(e){e.preventDefault();var f=a(this),g=f.data("contextlevel"),i=f.data("category"),j=f.data("purpose"),k=[{methodname:"tool_dataprivacy_get_category_options",args:{}},{methodname:"tool_dataprivacy_get_purpose_options",args:{}}],l=b.call(k),m=d.get_string("editdefaults","tool_dataprivacy",a("#defaults-header").text());a.when(l[0],l[1],m).then(function(a,b,c){var d=a.options,e=b.options;return h(c,g,i,j,null,d,e,null),!0})["catch"](c.exception)}),a(j.NEW_ACTIVITY_DEFAULTS).click(function(e){e.preventDefault();var f=a(this),g=f.data("contextlevel"),i=[{methodname:"tool_dataprivacy_get_category_options",args:{}},{methodname:"tool_dataprivacy_get_purpose_options",args:{}},{methodname:"tool_dataprivacy_get_activity_options",args:{nodefaults:!0}}],j=b.call(i),k=d.get_string("addnewdefaults","tool_dataprivacy");a.when(j[0],j[1],j[2],k).then(function(a,b,c,d){var e=a.options,f=b.options,i=c.options;return h(d,g,null,null,null,e,f,i),!0})["catch"](c.exception)}),a(j.EDIT_ACTIVITY_DEFAULTS).click(function(e){e.preventDefault();var f=a(this),g=f.data("contextlevel"),i=f.data("category"),j=f.data("purpose"),k=f.data("activityname"),l=[{methodname:"tool_dataprivacy_get_category_options",args:{}},{methodname:"tool_dataprivacy_get_purpose_options",args:{}},{methodname:"tool_dataprivacy_get_activity_options",args:{}}],m=b.call(l),n=d.get_string("editmoduledefaults","tool_dataprivacy");a.when(m[0],m[1],m[2],n).then(function(a,b,c,d){var e=a.options,f=b.options,l=c.options;return h(d,g,i,j,k,e,f,l),!0})["catch"](c.exception)}),a(j.DELETE_ACTIVITY_DEFAULTS).click(function(b){b.preventDefault();var h=a(this),j=h.data("contextlevel"),l=h.data("activityname"),m=h.data("activitydisplayname"),n=k,o=k;e.create({title:d.get_string("deletedefaults","tool_dataprivacy",m),body:g.render("tool_dataprivacy/delete_activity_defaults",{activityname:m}),type:e.types.SAVE_CANCEL,large:!0}).then(function(a){return a.setSaveButtonText(d.get_string("delete")),a.getRoot().on(f.save,function(){i(j,n,o,l,!1)}),a.getRoot().on(f.hidden,function(){a.destroy()}),a.show(),!0})["catch"](c.exception)})},{init:function(){return new l}}});

admin/tool/dataprivacy/amd/src/defaultsactions.js

@@ -0,0 +1,315 @@
+// 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/>.
+
+/**
+ * AMD module for data registry defaults actions.
+ *
+ * @module     tool_dataprivacy/defaultsactions
+ * @package    tool_dataprivacy
+ * @copyright  2018 Jun Pataleta
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+define([
+    'jquery',
+    'core/ajax',
+    'core/notification',
+    'core/str',
+    'core/modal_factory',
+    'core/modal_events',
+    'core/templates'],
+function($, Ajax, Notification, Str, ModalFactory, ModalEvents, Templates) {
+
+    /**
+     * List of action selectors.
+     *
+     * @type {{EDIT_LEVEL_DEFAULTS: string}}
+     * @type {{NEW_ACTIVITY_DEFAULTS: string}}
+     * @type {{EDIT_ACTIVITY_DEFAULTS: string}}
+     * @type {{DELETE_ACTIVITY_DEFAULTS: string}}
+     */
+    var ACTIONS = {
+        EDIT_LEVEL_DEFAULTS: '[data-action="edit-level-defaults"]',
+        NEW_ACTIVITY_DEFAULTS: '[data-action="new-activity-defaults"]',
+        EDIT_ACTIVITY_DEFAULTS: '[data-action="edit-activity-defaults"]',
+        DELETE_ACTIVITY_DEFAULTS: '[data-action="delete-activity-defaults"]'
+    };
+
+    /** @type {{INHERIT: Number}} **/
+    var INHERIT = -1;
+
+    /**
+     * DefaultsActions class.
+     */
+    var DefaultsActions = function() {
+        this.registerEvents();
+    };
+
+    /**
+     * Register event listeners.
+     */
+    DefaultsActions.prototype.registerEvents = function() {
+        $(ACTIONS.EDIT_LEVEL_DEFAULTS).click(function(e) {
+            e.preventDefault();
+
+            var button = $(this);
+            var contextLevel = button.data('contextlevel');
+            var category = button.data('category');
+            var purpose = button.data('purpose');
+
+            // Get options.
+            var requests = [
+                {methodname: 'tool_dataprivacy_get_category_options', args: {}},
+                {methodname: 'tool_dataprivacy_get_purpose_options', args: {}}
+            ];
+
+            var promises = Ajax.call(requests);
+            var titlePromise = Str.get_string('editdefaults', 'tool_dataprivacy', $('#defaults-header').text());
+            $.when(promises[0], promises[1], titlePromise).then(function(categoryResponse, purposeResponse, title) {
+                var categories = categoryResponse.options;
+                var purposes = purposeResponse.options;
+                showDefaultsFormModal(title, contextLevel, category, purpose, null, categories, purposes, null);
+
+                return true;
+            }).catch(Notification.exception);
+        });
+
+        $(ACTIONS.NEW_ACTIVITY_DEFAULTS).click(function(e) {
+            e.preventDefault();
+
+            var button = $(this);
+            var contextLevel = button.data('contextlevel');
+
+            // Get options.
+            var requests = [
+                {methodname: 'tool_dataprivacy_get_category_options', args: {}},
+                {methodname: 'tool_dataprivacy_get_purpose_options', args: {}},
+                {methodname: 'tool_dataprivacy_get_activity_options', args: {'nodefaults': true}}
+            ];
+
+            var promises = Ajax.call(requests);
+            var titlePromise = Str.get_string('addnewdefaults', 'tool_dataprivacy');
+
+            $.when(promises[0], promises[1], promises[2], titlePromise).then(
+                function(categoryResponse, purposeResponse, activityResponse, title) {
+                    var categories = categoryResponse.options;
+                    var purposes = purposeResponse.options;
+                    var activities = activityResponse.options;
+
+                    showDefaultsFormModal(title, contextLevel, null, null, null, categories, purposes, activities);
+
+                    return true;
+
+                }).catch(Notification.exception);
+            }
+        );
+
+        $(ACTIONS.EDIT_ACTIVITY_DEFAULTS).click(function(e) {
+            e.preventDefault();
+
+            var button = $(this);
+            var contextLevel = button.data('contextlevel');
+            var category = button.data('category');
+            var purpose = button.data('purpose');
+            var activity = button.data('activityname');
+
+            // Get options.
+            var requests = [
+                {methodname: 'tool_dataprivacy_get_category_options', args: {}},
+                {methodname: 'tool_dataprivacy_get_purpose_options', args: {}},
+                {methodname: 'tool_dataprivacy_get_activity_options', args: {}}
+            ];
+
+            var promises = Ajax.call(requests);
+            var titlePromise = Str.get_string('editmoduledefaults', 'tool_dataprivacy');
+
+            $.when(promises[0], promises[1], promises[2], titlePromise).then(
+                function(categoryResponse, purposeResponse, activityResponse, title) {
+                    var categories = categoryResponse.options;
+                    var purposes = purposeResponse.options;
+                    var activities = activityResponse.options;
+
+                    showDefaultsFormModal(title, contextLevel, category, purpose, activity, categories, purposes, activities);
+
+                    return true;
+
+                }).catch(Notification.exception);
+            }
+        );
+
+        $(ACTIONS.DELETE_ACTIVITY_DEFAULTS).click(function(e) {
+            e.preventDefault();
+
+            var button = $(this);
+            var contextLevel = button.data('contextlevel');
+            var activity = button.data('activityname');
+            var activityDisplayName = button.data('activitydisplayname');
+            // Set category and purpose to inherit (-1).
+            var category = INHERIT;
+            var purpose = INHERIT;
+
+            ModalFactory.create({
+                title: Str.get_string('deletedefaults', 'tool_dataprivacy', activityDisplayName),
+                body: Templates.render('tool_dataprivacy/delete_activity_defaults', {"activityname": activityDisplayName}),
+                type: ModalFactory.types.SAVE_CANCEL,
+                large: true
+            }).then(function(modal) {
+                modal.setSaveButtonText(Str.get_string('delete'));
+
+                // Handle save event.
+                modal.getRoot().on(ModalEvents.save, function() {
+                    setContextDefaults(contextLevel, category, purpose, activity, false);
+                });
+
+                // Handle hidden event.
+                modal.getRoot().on(ModalEvents.hidden, function() {
+                    // Destroy when hidden.
+                    modal.destroy();
+                });
+
+                modal.show();
+
+                return true;
+            }).catch(Notification.exception);
+        });
+    };
+
+    /**
+     * Prepares and renders the modal for setting the defaults for the given context level/plugin.
+     *
+     * @param {String} title The modal's title.
+     * @param {Number} contextLevel The context level to set defaults for.
+     * @param {Number} category The current category ID.
+     * @param {Number} purpose The current purpose ID.
+     * @param {String} activity The plugin name of the activity. Optional.
+     * @param {Array} categoryOptions The list of category options.
+     * @param {Array} purposeOptions The list of purpose options.
+     * @param {Array} activityOptions The list of activity options. Optional.
+     */
+    function showDefaultsFormModal(title, contextLevel, category, purpose, activity,
+                                   categoryOptions, purposeOptions, activityOptions) {
+
+        if (category !== null) {
+            categoryOptions.forEach(function(currentValue) {
+                if (currentValue.id === category) {
+                    currentValue.selected = true;
+                }
+            });
+        }
+
+        if (purpose !== null) {
+            purposeOptions.forEach(function(currentValue) {
+                if (currentValue.id === purpose) {
+                    currentValue.selected = true;
+                }
+            });
+        }
+
+        var templateContext = {
+            "contextlevel": contextLevel,
+            "categoryoptions": categoryOptions,
+            "purposeoptions": purposeOptions
+        };
+
+        // Check the activityOptions parameter that was passed.
+        if (activityOptions !== null && activityOptions.length) {
+            // Check the activity parameter that was passed.
+            if (activity === null) {
+                // We're setting a new defaults for a module.
+                templateContext.newactivitydefaults = true;
+
+            } else {
+                // Edit mode. Set selection.
+                activityOptions.forEach(function(currentValue) {
+                    if (activity === currentValue.name) {
+                        currentValue.selected = true;
+                    }
+                });
+            }
+
+            templateContext.modemodule = true;
+            templateContext.activityoptions = activityOptions;
+        }
+
+        ModalFactory.create({
+            title: title,
+            body: Templates.render('tool_dataprivacy/category_purpose_form', templateContext),
+            type: ModalFactory.types.SAVE_CANCEL,
+            large: true
+        }).then(function(modal) {
+
+            // Handle save event.
+            modal.getRoot().on(ModalEvents.save, function() {
+                var activity = $('#activity');
+                var activityVal = typeof activity !== 'undefined' ? activity.val() : null;
+                var override = $('#override');
+                var overrideVal = typeof override !== 'undefined' ? override.is(':checked') : false;
+
+                setContextDefaults($('#contextlevel').val(), $('#category').val(), $('#purpose').val(), activityVal, overrideVal);
+            });
+
+            // Handle hidden event.
+            modal.getRoot().on(ModalEvents.hidden, function() {
+                // Destroy when hidden.
+                modal.destroy();
+            });
+
+            modal.show();
+
+            return modal;
+        }).catch(Notification.exception);
+    }
+
+    /**
+     * Calls a the tool_dataprivacy_set_context_defaults WS function.
+     *
+     * @param {Number} contextLevel The context level.
+     * @param {Number} category The category ID.
+     * @param {Number} purpose The purpose ID.
+     * @param {String} activity The plugin name of the activity module.
+     * @param {Boolean} override Whether to override custom instances.
+     */
+    function setContextDefaults(contextLevel, category, purpose, activity, override) {
+        var request = {
+            methodname: 'tool_dataprivacy_set_context_defaults',
+            args: {
+                'contextlevel': contextLevel,
+                'category': category,
+                'purpose': purpose,
+                'override': override,
+                'activity': activity
+            }
+        };
+
+        Ajax.call([request])[0].done(function(data) {
+            if (data.result) {
+                window.location.reload();
+            }
+        });
+    }
+
+    return /** @alias module:tool_dataprivacy/defaultsactions */ {
+        // Public variables and functions.
+
+        /**
+         * Initialise the module.
+         *
+         * @method init
+         * @return {DefaultsActions}
+         */
+        'init': function() {
+            return new DefaultsActions();
+        }
+    };
+});

admin/tool/dataprivacy/classes/api.php

@@ -24,7 +24,7 @@
 namespace tool_dataprivacy;
 
 use coding_exception;
-use context_course;
+use context_helper;
 use context_system;
 use core\invalid_persistent_exception;
 use core\message\message;
@@ -1141,4 +1141,89 @@ class api {
 
         return $approvedcollection;
     }
+
+    /**
+     * Updates the default category and purpose for a given context level (and optionally, a plugin).
+     *
+     * @param int $contextlevel The context level.
+     * @param int $categoryid The ID matching the category.
+     * @param int $purposeid The ID matching the purpose record.
+     * @param int $activity The name of the activity that we're making a defaults configuration for.
+     * @param bool $override Whether to override the purpose/categories of existing instances to these defaults.
+     * @return boolean True if set/unset config succeeds. Otherwise, it throws an exception.
+     */
+    public static function set_context_defaults($contextlevel, $categoryid, $purposeid, $activity = null, $override = false) {
+        global $DB;
+
+        self::check_can_manage_data_registry();
+
+        // Get the class name associated with this context level.
+        $classname = context_helper::get_class_for_level($contextlevel);
+        list($purposevar, $categoryvar) = data_registry::var_names_from_context($classname, $activity);
+
+        // Check the default category to be set.
+        if ($categoryid == context_instance::INHERIT) {
+            unset_config($categoryvar, 'tool_dataprivacy');
+
+        } else {
+            // Make sure the given category ID exists first.
+            $categorypersistent = new category($categoryid);
+            $categorypersistent->read();
+
+            // Then set the new default value.
+            set_config($categoryvar, $categoryid, 'tool_dataprivacy');
+        }
+
+        // Check the default purpose to be set.
+        if ($purposeid == context_instance::INHERIT) {
+            // If the defaults is set to inherit, just unset the config value.
+            unset_config($purposevar, 'tool_dataprivacy');
+
+        } else {
+            // Make sure the given purpose ID exists first.
+            $purposepersistent = new purpose($purposeid);
+            $purposepersistent->read();
+
+            // Then set the new default value.
+            set_config($purposevar, $purposeid, 'tool_dataprivacy');
+        }
+
+        // Unset instances that have been assigned with custom purpose and category, if override was specified.
+        if ($override) {
+            // We'd like to find context IDs that we want to unset.
+            $statements = ["SELECT c.id as contextid FROM {context} c"];
+            // Based on this context level.
+            $params = ['contextlevel' => $contextlevel];
+
+            if ($contextlevel == CONTEXT_MODULE) {
+                // If we're deleting module context instances, we need to make sure the instance ID is in the course modules table.
+                $statements[] = "JOIN {course_modules} cm ON cm.id = c.instanceid";
+                // And that the module is listed on the modules table.
+                $statements[] = "JOIN {modules} m ON m.id = cm.module";
+
+                if ($activity) {
+                    // If we're overriding for an activity module, make sure that the context instance matches that activity.
+                    $statements[] = "AND m.name = :modname";
+                    $params['modname'] = $activity;
+                }
+            }
+            // Make sure this context instance exists in the tool_dataprivacy_ctxinstance table.
+            $statements[] = "JOIN {tool_dataprivacy_ctxinstance} tdc ON tdc.contextid = c.id";
+            // And that the context level of this instance matches the given context level.
+            $statements[] = "WHERE c.contextlevel = :contextlevel";
+
+            // Build our SQL query by gluing the statements.
+            $sql = implode("\n", $statements);
+
+            // Get the context records matching our query.
+            $contextinstances = $DB->get_records_sql($sql, $params);
+
+            // Delete the matching context instances by passing an instance record without the purpose and instance.
+            foreach ($contextinstances as $instance) {
+                self::set_context_instance($instance);
+            }
+        }
+
+        return true;
+    }
 }

admin/tool/dataprivacy/classes/data_registry.php

@@ -57,13 +57,22 @@ class data_registry {
     /**
      * Returns purpose and category var names from a context class name
      *
-     * @param string $classname
+     * @param string $classname The context level's class.
+     * @param string $pluginname The name of the plugin associated with the context level.
      * @return string[]
      */
-    public static function var_names_from_context($classname) {
+    public static function var_names_from_context($classname, $pluginname = '') {
+        $pluginname = trim($pluginname);
+        if (!empty($pluginname)) {
+            $categoryvar = $classname . '_' . $pluginname . '_category';
+            $purposevar = $classname . '_' . $pluginname . '_purpose';
+        } else {
+            $categoryvar = $classname . '_category';
+            $purposevar = $classname . '_purpose';
+        }
         return [
-            $classname . '_purpose',
-            $classname . '_category',
+            $purposevar,
+            $categoryvar
         ];
     }
 
@@ -72,13 +81,14 @@ class data_registry {
      *
      * The caller code is responsible of checking that $contextlevel is an integer.
      *
-     * @param int $contextlevel
-     * @return int|false[]
+     * @param int $contextlevel The context level.
+     * @param string $pluginname The name of the plugin associated with the context level.
+     * @return int[]|false[]
      */
-    public static function get_defaults($contextlevel) {
+    public static function get_defaults($contextlevel, $pluginname = '') {
 
         $classname = \context_helper::get_class_for_level($contextlevel);
-        list($purposevar, $categoryvar) = self::var_names_from_context($classname);
+        list($purposevar, $categoryvar) = self::var_names_from_context($classname, $pluginname);
 
         $purposeid = get_config('tool_dataprivacy', $purposevar);
         $categoryid = get_config('tool_dataprivacy', $categoryvar);

admin/tool/dataprivacy/classes/external.php

@@ -1110,6 +1110,304 @@ class external extends external_api {
         ]);
     }
 
+    /**
+     * Parameters for set_context_defaults().
+     *
+     * @return external_function_parameters
+     */
+    public static function set_context_defaults_parameters() {
+        return new external_function_parameters([
+            'contextlevel' => new external_value(PARAM_INT, 'Expired context record ID', VALUE_REQUIRED),
+            'category' => new external_value(PARAM_INT, 'The default category for the given context level', VALUE_REQUIRED),
+            'purpose' => new external_value(PARAM_INT, 'The default purpose for the given context level', VALUE_REQUIRED),
+            'activity' => new external_value(PARAM_PLUGIN, 'The plugin name of the activity', VALUE_DEFAULT, null),
+            'override' => new external_value(PARAM_BOOL, 'Whether to override existing instances with the defaults', VALUE_DEFAULT,
+                false),
+        ]);
+    }
+
+    /**
+     * Updates the default category and purpose for a given context level (and optionally, a plugin).
+     *
+     * @param int $contextlevel The context level.
+     * @param int $category The ID matching the category.
+     * @param int $purpose The ID matching the purpose record.
+     * @param int $activity The name of the activity that we're making a defaults configuration for.
+     * @param bool $override Whether to override the purpose/categories of existing instances to these defaults.
+     * @return array
+     */
+    public static function set_context_defaults($contextlevel, $category, $purpose, $activity, $override) {
+        $warnings = [];
+
+        $params = external_api::validate_parameters(self::set_context_defaults_parameters(), [
+            'contextlevel' => $contextlevel,
+            'category' => $category,
+            'purpose' => $purpose,
+            'activity' => $activity,
+            'override' => $override,
+        ]);
+        $contextlevel = $params['contextlevel'];
+        $category = $params['category'];
+        $purpose = $params['purpose'];
+        $activity = $params['activity'];
+        $override = $params['override'];
+
+        // Validate context.
+        $context = context_system::instance();
+        self::validate_context($context);
+
+        // Set the context defaults.
+        $result = api::set_context_defaults($contextlevel, $category, $purpose, $activity, $override);
+
+        return [
+            'result' => $result,
+            'warnings' => $warnings
+        ];
+    }
+
+    /**
+     * Returns for set_context_defaults().
+     *
+     * @return external_single_structure
+     */
+    public static function set_context_defaults_returns() {
+        return new external_single_structure([
+            'result' => new external_value(PARAM_BOOL, 'Whether the context defaults were successfully set or not'),
+            'warnings' => new external_warnings()
+        ]);
+    }
+
+    /**
+     * Parameters for get_category_options().
+     *
+     * @return external_function_parameters
+     */
+    public static function get_category_options_parameters() {
+        return new external_function_parameters([
+            'includeinherit' => new external_value(PARAM_BOOL, 'Include option "Inherit"', VALUE_DEFAULT, true),
+            'includenotset' => new external_value(PARAM_BOOL, 'Include option "Not set"', VALUE_DEFAULT, false),
+        ]);
+    }
+
+    /**
+     * Fetches a list of data category options containing category IDs as keys and the category name for the value.
+     *
+     * @param bool $includeinherit Whether to include the "Inherit" option.
+     * @param bool $includenotset Whether to include the "Not set" option.
+     * @return array
+     */
+    public static function get_category_options($includeinherit, $includenotset) {
+        $warnings = [];
+
+        $params = self::validate_parameters(self::get_category_options_parameters(), [
+            'includeinherit' => $includeinherit,
+            'includenotset' => $includenotset
+        ]);
+        $includeinherit = $params['includeinherit'];
+        $includenotset = $params['includenotset'];
+
+        $context = context_system::instance();
+        self::validate_context($context);
+
+        $categories = api::get_categories();
+        $categoryoptions = [];
+        if ($includeinherit) {
+            $categoryoptions[] = [
+                'id' => context_instance::INHERIT,
+                'name' => get_string('inherit', 'tool_dataprivacy'),
+            ];
+        }
+        if ($includenotset) {
+            $categoryoptions[] = [
+                'id' => context_instance::NOTSET,
+                'name' => get_string('notset', 'tool_dataprivacy'),
+            ];
+        }
+        foreach ($categories as $category) {
+            $categoryoptions[] = [
+                'id' => $category->get('id'),
+                'name' => $category->get('name'),
+            ];
+        }
+
+        return [
+            'options' => $categoryoptions,
+            'warnings' => $warnings
+        ];
+    }
+
+    /**
+     * Returns for get_category_options().
+     *
+     * @return external_single_structure
+     */
+    public static function get_category_options_returns() {
+        $optiondefinition = new external_single_structure(
+            [
+                'id' => new external_value(PARAM_INT, 'The category ID'),
+                'name' => new external_value(PARAM_TEXT, 'The category name'),
+            ]
+        );
+
+        return new external_single_structure([
+            'options' => new external_multiple_structure($optiondefinition),
+            'warnings' => new external_warnings()
+        ]);
+    }
+
+    /**
+     * Parameters for get_purpose_options().
+     *
+     * @return external_function_parameters
+     */
+    public static function get_purpose_options_parameters() {
+        return new external_function_parameters([
+            'includeinherit' => new external_value(PARAM_BOOL, 'Include option "Inherit"', VALUE_DEFAULT, true),
+            'includenotset' => new external_value(PARAM_BOOL, 'Include option "Not set"', VALUE_DEFAULT, false),
+        ]);
+    }
+
+    /**
+     * Fetches a list of data storage purposes containing purpose IDs as keys and the purpose name for the value.
+     *
+     * @param bool $includeinherit Whether to include the "Inherit" option.
+     * @param bool $includenotset Whether to include the "Not set" option.
+     * @return array
+     */
+    public static function get_purpose_options($includeinherit, $includenotset) {
+        $warnings = [];
+
+        $params = self::validate_parameters(self::get_category_options_parameters(), [
+            'includeinherit' => $includeinherit,
+            'includenotset' => $includenotset
+        ]);
+        $includeinherit = $params['includeinherit'];
+        $includenotset = $params['includenotset'];
+
+        $context = context_system::instance();
+        self::validate_context($context);
+
+        $purposes = api::get_purposes();
+        $purposeoptions = [];
+        if ($includeinherit) {
+            $purposeoptions[] = [
+                'id' => context_instance::INHERIT,
+                'name' => get_string('inherit', 'tool_dataprivacy'),
+            ];
+        }
+        if ($includenotset) {
+            $purposeoptions[] = [
+                'id' => context_instance::NOTSET,
+                'name' => get_string('notset', 'tool_dataprivacy'),
+            ];
+        }
+        foreach ($purposes as $purpose) {
+            $purposeoptions[] = [
+                'id' => $purpose->get('id'),
+                'name' => $purpose->get('name'),
+            ];
+        }
+
+        return [
+            'options' => $purposeoptions,
+            'warnings' => $warnings
+        ];
+    }
+
+    /**
+     * Returns for get_purpose_options().
+     *
+     * @return external_single_structure
+     */
+    public static function get_purpose_options_returns() {
+        $optiondefinition = new external_single_structure(
+            [
+                'id' => new external_value(PARAM_INT, 'The purpose ID'),
+                'name' => new external_value(PARAM_TEXT, 'The purpose name'),
+            ]
+        );
+
+        return new external_single_structure([
+            'options' => new external_multiple_structure($optiondefinition),
+            'warnings' => new external_warnings()
+        ]);
+    }
+
+    /**
+     * Parameters for get_activity_options().
+     *
+     * @return external_function_parameters
+     */
+    public static function get_activity_options_parameters() {
+        return new external_function_parameters([
+            'nodefaults' => new external_value(PARAM_BOOL, 'Whether to fetch all activities or only those without defaults',
+                VALUE_DEFAULT, false),
+        ]);
+    }
+
+    /**
+     * Fetches a list of activity options for setting data registry defaults.
+     *
+     * @param boolean $nodefaults If false, it will fetch all of the activities. Otherwise, it will only fetch the activities
+     *                            that don't have defaults yet (e.g. when adding a new activity module defaults).
+     * @return array
+     */
+    public static function get_activity_options($nodefaults) {
+        $warnings = [];
+
+        $params = self::validate_parameters(self::get_activity_options_parameters(), [
+            'nodefaults' => $nodefaults,
+        ]);
+        $nodefaults = $params['nodefaults'];
+
+        $context = context_system::instance();
+        self::validate_context($context);
+
+        // Get activity module plugin info.
+        $pluginmanager = \core_plugin_manager::instance();
+        $modplugins = $pluginmanager->get_plugins_of_type('mod');
+        $modoptions = [];
+        foreach ($modplugins as $plugin) {
+            // Check if we have default purpose and category for this module if we want don't want to fetch everything.
+            if ($nodefaults) {
+                list($purpose, $category) = data_registry::get_defaults(CONTEXT_MODULE, $plugin->name);
+                if ($purpose !== false || $category !== false) {
+                    // If so, skip it.
+                    continue;
+                }
+            }
+
+            $modoptions[] = (object)[
+                'name' => $plugin->name,
+                'displayname' => $plugin->displayname
+            ];
+        }
+
+        return [
+            'options' => $modoptions,
+            'warnings' => $warnings
+        ];
+    }
+
+    /**
+     * Returns for get_category_options().
+     *
+     * @return external_single_structure
+     */
+    public static function get_activity_options_returns() {
+        $optionsdefinition = new external_single_structure(
+            [
+                'name' => new external_value(PARAM_TEXT, 'The plugin name of the activity'),
+                'displayname' => new external_value(PARAM_TEXT, 'The display name of the activity'),
+            ]
+        );
+
+        return new external_single_structure([
+            'options' => new external_multiple_structure($optionsdefinition),
+            'warnings' => new external_warnings()
+        ]);
+    }
+
     /**
      * Gets the structure of a tree node (link + child branches).
      *

admin/tool/dataprivacy/classes/local/helper.php

@@ -27,6 +27,9 @@ defined('MOODLE_INTERNAL') || die();
 use coding_exception;
 use moodle_exception;
 use tool_dataprivacy\api;
+use tool_dataprivacy\category;
+use tool_dataprivacy\context_instance;
+use tool_dataprivacy\purpose;
 
 /**
  * Class containing helper functions for the data privacy tool.
@@ -209,4 +212,38 @@ class helper {
         }
         return $options;
     }
+
+    /**
+     * Fetches a category name from the given ID.
+     *
+     * @param int $category The category ID. Could be INHERIT (false, -1), NOT_SET (0), or the actual ID.
+     * @return string The category name.
+     */
+    public static function get_category_name($category) {
+        if ($category === false || $category == context_instance::INHERIT) {
+            return get_string('inherit', 'tool_dataprivacy');
+        } else if ($category == context_instance::NOTSET) {
+            return get_string('notset', 'tool_dataprivacy');
+        } else {
+            $category = new category($category);
+            return format_string($category->get('name'));
+        }
+    }
+
+    /**
+     * Fetches a purpose name from the given ID.
+     *
+     * @param int $purpose The purpose ID. Could be INHERIT (false, -1), NOT_SET (0), or the actual ID.
+     * @return string The purpose name.
+     */
+    public static function get_purpose_name($purpose) {
+        if ($purpose === false || $purpose == context_instance::INHERIT) {
+            return get_string('inherit', 'tool_dataprivacy');
+        } else if ($purpose == context_instance::NOTSET) {
+            return get_string('notset', 'tool_dataprivacy');
+        } else {
+            $purpose = new purpose($purpose);
+            return format_string($purpose->get('name'));
+        }
+    }
 }

admin/tool/dataprivacy/classes/output/defaults_page.php

@@ -0,0 +1,151 @@
+<?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/>.
+
+/**
+ * Class containing data for the data registry defaults.
+ *
+ * @package    tool_dataprivacy
+ * @copyright  2018 Jun Pataleta
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+namespace tool_dataprivacy\output;
+defined('MOODLE_INTERNAL') || die();
+
+use coding_exception;
+use moodle_exception;
+use moodle_url;
+use renderable;
+use renderer_base;
+use stdClass;
+use templatable;
+use tool_dataprivacy\data_registry;
+use tool_dataprivacy\local\helper;
+
+/**
+ * Class containing data for the data registry defaults.
+ *
+ * @copyright  2018 Jun Pataleta
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class defaults_page implements renderable, templatable {
+
+    /** @var int $mode The display mode. */
+    protected $mode = null;
+
+    /** @var int $category The default category for the given mode. */
+    protected $category = null;
+
+    /** @var int $purpose The default purpose for the given mode. */
+    protected $purpose = null;
+
+    /** @var stdClass[] $otherdefaults Other defaults for the given mode. */
+    protected $otherdefaults = [];
+
+    /** @var bool $canedit Whether editing is allowed. */
+    protected $canedit = false;
+
+    /**
+     * Construct this renderable.
+     *
+     * @param int $mode The display mode.
+     * @param int $category The default category for the given mode.
+     * @param int $purpose The default purpose for the given mode.
+     * @param stdClass[] $otherdefaults Other defaults for the given mode.
+     * @param bool $canedit Whether editing is allowed.
+     */
+    public function __construct($mode, $category, $purpose, $otherdefaults = [], $canedit = false) {
+        $this->mode = $mode;
+        $this->category = $category;
+        $this->purpose = $purpose;
+        $this->otherdefaults = $otherdefaults;
+        $this->canedit = $canedit;
+    }
+
+    /**
+     * Export this data so it can be used as the context for a mustache template.
+     *
+     * @param renderer_base $output
+     * @return stdClass
+     * @throws coding_exception
+     * @throws moodle_exception
+     */
+    public function export_for_template(renderer_base $output) {
+        $data = new stdClass();
+
+        // Set tab URLs.
+        $coursecaturl = new moodle_url('/admin/tool/dataprivacy/defaults.php', ['mode' => CONTEXT_COURSECAT]);
+        $courseurl = new moodle_url('/admin/tool/dataprivacy/defaults.php', ['mode' => CONTEXT_COURSE]);
+        $moduleurl = new moodle_url('/admin/tool/dataprivacy/defaults.php', ['mode' => CONTEXT_MODULE]);
+        $blockurl = new moodle_url('/admin/tool/dataprivacy/defaults.php', ['mode' => CONTEXT_BLOCK]);
+        $data->coursecaturl = $coursecaturl;
+        $data->courseurl = $courseurl;
+        $data->moduleurl = $moduleurl;
+        $data->blockurl = $blockurl;
+
+        // Set display mode.
+        switch ($this->mode) {
+            case CONTEXT_COURSECAT:
+                $data->modecoursecat = true;
+                break;
+            case CONTEXT_COURSE:
+                $data->modecourse = true;
+                break;
+            case CONTEXT_MODULE:
+                $data->modemodule = true;
+                break;
+            case CONTEXT_BLOCK:
+                $data->modeblock = true;
+                break;
+            default:
+                $data->modecoursecat = true;
+                break;
+        }
+
+        // Set config variables.
+        $configname = \context_helper::get_class_for_level($this->mode);
+        list($purposevar, $categoryvar) = data_registry::var_names_from_context($configname);
+        $data->categoryvar = $categoryvar;
+        $data->purposevar = $purposevar;
+
+        // Set default category.
+        $data->categoryid = $this->category;
+        $data->category = helper::get_category_name($this->category);
+
+        // Set default purpose.
+        $data->purposeid = $this->purpose;
+        $data->purpose = helper::get_purpose_name($this->purpose);
+
+        // Set other defaults.
+        $otherdefaults = [];
+        foreach ($this->otherdefaults as $pluginname => $values) {
+            $defaults = [
+                'activityname' => $pluginname,
+                'name' => $values->name,
+                'categoryid' => $values->category,
+                'category' => helper::get_category_name($values->category),
+                'purposeid' => $values->purpose,
+                'purpose' => helper::get_purpose_name($values->purpose),
+            ];
+            $otherdefaults[] = (object)$defaults;
+        }
+        $data->otherdefaults = $otherdefaults;
+
+        $data->canedit = $this->canedit;
+        $data->contextlevel = $this->mode;
+
+        return $data;
+    }
+}

admin/tool/dataprivacy/db/services.php

@@ -173,4 +173,44 @@ $functions = [
         'ajax'          => true,
         'loginrequired' => true,
     ],
+    'tool_dataprivacy_set_context_defaults' => [
+        'classname'     => 'tool_dataprivacy\external',
+        'methodname'    => 'set_context_defaults',
+        'classpath'     => '',
+        'description'   => 'Updates the default category and purpose for a given context level (and optionally, a plugin)',
+        'type'          => 'write',
+        'capabilities'  => 'tool/dataprivacy:managedataregistry',
+        'ajax'          => true,
+        'loginrequired' => true,
+    ],
+    'tool_dataprivacy_get_category_options' => [
+        'classname'     => 'tool_dataprivacy\external',
+        'methodname'    => 'get_category_options',
+        'classpath'     => '',
+        'description'   => 'Fetches a list of data category options',
+        'type'          => 'read',
+        'capabilities'  => 'tool/dataprivacy:managedataregistry',
+        'ajax'          => true,
+        'loginrequired' => true,
+    ],
+    'tool_dataprivacy_get_purpose_options' => [
+        'classname'     => 'tool_dataprivacy\external',
+        'methodname'    => 'get_purpose_options',
+        'classpath'     => '',
+        'description'   => 'Fetches a list of data storage purpose options',
+        'type'          => 'read',
+        'capabilities'  => 'tool/dataprivacy:managedataregistry',
+        'ajax'          => true,
+        'loginrequired' => true,
+    ],
+    'tool_dataprivacy_get_activity_options' => [
+        'classname'     => 'tool_dataprivacy\external',
+        'methodname'    => 'get_activity_options',
+        'classpath'     => '',
+        'description'   => 'Fetches a list of activity options',
+        'type'          => 'read',
+        'capabilities'  => 'tool/dataprivacy:managedataregistry',
+        'ajax'          => true,
+        'loginrequired' => true,
+    ],
 ];

admin/tool/dataprivacy/defaults.php

@@ -32,47 +32,37 @@ $title = get_string('setdefaults', 'tool_dataprivacy');
 
 \tool_dataprivacy\page_helper::setup($url, $title, 'dataregistry');
 
-$levels = \context_helper::get_all_levels();
-// They are set through the context level site and user.
-unset($levels[CONTEXT_SYSTEM]);
-unset($levels[CONTEXT_USER]);
+$mode = optional_param('mode', CONTEXT_COURSECAT, PARAM_INT);
+$classname = context_helper::get_class_for_level($mode);
+list($purposevar, $categoryvar) = \tool_dataprivacy\data_registry::var_names_from_context($classname);
+$purpose = get_config('tool_dataprivacy', $purposevar);
+$category = get_config('tool_dataprivacy', $categoryvar);
 
-$customdata = [
-    'levels' => $levels,
-    'purposes' => \tool_dataprivacy\api::get_purposes(),
-    'categories' => \tool_dataprivacy\api::get_categories(),
-];
-$form = new \tool_dataprivacy\form\defaults($PAGE->url->out(false), $customdata);
+$otherdefaults = [];
+if ($mode == CONTEXT_MODULE) {
+    // Get activity module plugin info.
+    $pluginmanager = core_plugin_manager::instance();
+    $modplugins = $pluginmanager->get_plugins_of_type('mod');
 
-$toform = new stdClass();
-foreach ($levels as $level => $classname) {
-    list($purposevar, $categoryvar) = \tool_dataprivacy\data_registry::var_names_from_context($classname);
-    $toform->{$purposevar} = get_config('tool_dataprivacy', $purposevar);
-    $toform->{$categoryvar} = get_config('tool_dataprivacy', $categoryvar);
-}
-$form->set_data($toform);
-
-$returnurl = new \moodle_url('/admin/tool/dataprivacy/dataregistry.php');
-if ($form->is_cancelled()) {
-    redirect($returnurl);
-} else if ($data = $form->get_data()) {
-
-    foreach ($levels as $level => $classname) {
-
-        list($purposevar, $categoryvar) = \tool_dataprivacy\data_registry::var_names_from_context($classname);
-
-        if (isset($data->{$purposevar})) {
-            set_config($purposevar, $data->{$purposevar}, 'tool_dataprivacy');
-        }
-        if (isset($data->{$categoryvar})) {
-            set_config($categoryvar, $data->{$categoryvar}, 'tool_dataprivacy');
+    foreach ($modplugins as $plugin) {
+        list($purposevar, $categoryvar) = \tool_dataprivacy\data_registry::var_names_from_context($classname, $plugin->name);
+        $plugincategory = get_config('tool_dataprivacy', $categoryvar);
+        $pluginpurpose = get_config('tool_dataprivacy', $purposevar);
+        if ($plugincategory === false && $pluginpurpose === false) {
+            // If no purpose and category has been set for this plugin, then there's no need to show this on the list.
+            continue;
         }
+        $otherdefaults[$plugin->name] = (object)[
+            'name' => $plugin->displayname,
+            'category' => $plugincategory,
+            'purpose' => $pluginpurpose,
+        ];
     }
-    redirect($returnurl, get_string('defaultssaved', 'tool_dataprivacy'),
-        0, \core\output\notification::NOTIFY_SUCCESS);
 }
 
+$defaultspage = new \tool_dataprivacy\output\defaults_page($mode, $category, $purpose, $otherdefaults, true);
+
 $output = $PAGE->get_renderer('tool_dataprivacy');
 echo $output->header();
-$form->display();
+echo $output->render_from_template('tool_dataprivacy/defaults_page', $defaultspage->export_for_template($output));
 echo $output->footer();

admin/tool/dataprivacy/lang/en/tool_dataprivacy.php

@@ -28,6 +28,7 @@ $string['pluginname'] = 'Data privacy';
 $string['pluginname_help'] = 'Data privacy plugin';
 $string['activitiesandresources'] = 'Activities and resources';
 $string['addcategory'] = 'Add category';
+$string['addnewdefaults'] = 'Add a new module default';
 $string['addpurpose'] = 'Add purpose';
 $string['approve'] = 'Approve';
 $string['approverequest'] = 'Approve request';
@@ -76,9 +77,12 @@ $string['datarequests'] = 'Data requests';
 $string['datecomment'] = '[{$a->date}]: ' . PHP_EOL . ' {$a->comment}';
 $string['daterequested'] = 'Date requested';
 $string['daterequesteddetail'] = 'Date requested:';
-$string['defaultsinfo'] = 'Default categories and purposes are applied to all newly created instances.';
+$string['defaultsinfo'] = 'Default categories and purposes are applied to all new and existing instances where a value is not set.';
+$string['defaultswarninginfo'] = 'Warning: Changing these defaults may affect the retention period of existing instances.';
 $string['deletecategory'] = 'Delete category';
 $string['deletecategorytext'] = 'Are you sure you want to delete the category \'{$a}\'?';
+$string['deletedefaults'] = 'Delete defaults: {$a}';
+$string['deletedefaultsconfirmation'] = 'Are you sure you want to delete the default category and purpose for {$a} modules?';
 $string['deleteexpiredcontextstask'] = 'Delete expired contexts';
 $string['deleteexpireddatarequeststask'] = 'Delete files from completed data requests that have expired';
 $string['deletepurpose'] = 'Delete purpose';
@@ -95,6 +99,8 @@ $string['dporolemapping_desc'] = 'The privacy officer can manage data requests.
 $string['editcategories'] = 'Edit categories';
 $string['editcategory'] = 'Edit category';
 $string['editcategories'] = 'Edit categories';
+$string['editdefaults'] = 'Edit defaults: {$a}';
+$string['editmoduledefaults'] = 'Edit module defaults';
 $string['editpurpose'] = 'Edit purpose';
 $string['editpurposes'] = 'Edit purposes';
 $string['effectiveretentionperiodcourse'] = '{$a} (after the course end date)';
@@ -185,6 +191,7 @@ $string['nopurposes'] = 'There are no purposes yet';
 $string['nosubjectaccessrequests'] = 'There are no data requests that you need to act on';
 $string['nosystemdefaults'] = 'Site purpose and category have not yet been defined.';
 $string['notset'] = 'Not set (use the default value)';
+$string['overrideinstances'] = 'Reset instances with custom values';
 $string['pluginregistry'] = 'Plugin privacy registry';
 $string['pluginregistrytitle'] = 'Plugin privacy compliance registry';
 $string['privacy'] = 'Privacy';

admin/tool/dataprivacy/templates/category_purpose_form.mustache

@@ -0,0 +1,99 @@
+{{!
+    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 tool_dataprivacy/category_purpose_form
+
+    Manage data registry defaults.
+
+    Classes required for JS:
+
+    Data attributes required for JS:
+
+    Context variables required for this template:
+    * actionurl String The action URL.
+    * contextlevel Number - The context level.
+    * modemodule Boolean - Whether to display the activity select element.
+    * activityoptions Array - An array of objects for the activity select element.
+    * categoryoptions Array - An array of objects for the category select element.
+    * purposeoptions Array - An array of objects for the purpose select element.
+
+    Example context (json):
+    {
+        "actionurl": "#",
+        "contextlevel": 70,
+        "newactivitydefaults": true,
+        "modemodule": true,
+        "activityoptions": [
+            { "name": "assign", "displayname": "Assignment" },
+            { "name": "forum", "displayname": "Forum", "selected": true },
+            { "name": "lesson", "displayname": "Lesson" },
+            { "name": "quiz", "displayname": "Quiz" }
+        ],
+        "categoryoptions": [
+            { "id": 1, "name": "Category 1" },
+            { "id": 2, "name": "Category 2", "selected": true },
+            { "id": 3, "name": "Category 3" }
+        ],
+        "purposeoptions": [
+            { "id": 1, "name": "Purpose 1" },
+            { "id": 2, "name": "Purpose 2" },
+            { "id": 3, "name": "Purpose 3", "selected": true }
+        ]
+    }
+}}
+
+<div class="alert alert-warning" role="alert">
+    {{#str}}defaultswarninginfo, tool_dataprivacy{{/str}}
+</div>
+<form method="post" action="{{actionurl}}" id="category_purpose_form">
+    <input type="hidden" value="{{contextlevel}}" id="contextlevel" />
+    {{#modemodule}}
+    <div class="form-group">
+        <label for="activity">{{#str}}activitymodule{{/str}}</label>
+        {{^newactivitydefaults}}
+            <input type="hidden" id="activity" value="{{#activityoptions}}{{#selected}}{{name}}{{/selected}}{{/activityoptions}}" />
+        {{/newactivitydefaults}}
+        <select class="form-control" {{#newactivitydefaults}}id="activity" {{/newactivitydefaults}}{{^newactivitydefaults}}disabled{{/newactivitydefaults}}>
+            {{#activityoptions}}
+                <option value="{{name}}" {{#selected}}selected{{/selected}}>{{displayname}}</option>
+            {{/activityoptions}}
+        </select>
+    </div>
+    {{/modemodule}}
+    <div class="form-group">
+        <label for="category">{{#str}}category, tool_dataprivacy{{/str}}</label>
+        <select class="form-control" id="category">
+        {{#categoryoptions}}
+            <option value="{{id}}" {{#selected}}selected{{/selected}}>{{name}}</option>
+        {{/categoryoptions}}
+        </select>
+    </div>
+    <div class="form-group">
+        <label for="purpose">{{#str}}purpose, tool_dataprivacy{{/str}}</label>
+        <select class="form-control" id="purpose">
+        {{#purposeoptions}}
+            <option value="{{id}}" {{#selected}}selected{{/selected}}>{{name}}</option>
+        {{/purposeoptions}}
+        </select>
+    </div>
+    <div class="form-check">
+        <input class="form-check-input" type="checkbox" value="1" id="override">
+        <label class="form-check-label" for="override">
+            {{#str}}overrideinstances, tool_dataprivacy{{/str}}
+        </label>
+    </div>
+</form>

admin/tool/dataprivacy/templates/defaults_display.mustache

@@ -0,0 +1,74 @@
+{{!
+    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 tool_dataprivacy/defaults_display
+
+    Renders the current default category and purpose.
+
+    Classes required for JS:
+
+    Data attributes required for JS:
+
+    Context variables required for this template:
+    * contextlevel Number - The context level.
+    * categoryid Number - The category ID.
+    * purposeid Number - The purpose ID.
+    * category String - The category name.
+    * purpose String - The purpose name.
+    * canedit Boolean - Whether this is being rendered for editing purposes.
+
+    Example context (json):
+    {
+        "category": "Awesome default category",
+        "categoryid": 1,
+        "purpose": "Awesome default purpose",
+        "purposeid": 2,
+        "canedit": true,
+        "contextlevel": 70
+    }
+}}
+<div class="row m-t-1 m-b-1">
+    <div class="col-md-9">
+        <div class="row m-t-1 m-b-1">
+            <div class="col-md-3">
+                <strong>{{#str}}category, tool_dataprivacy{{/str}}</strong>
+            </div>
+            <div class="col-md-9">
+                {{category}}
+            </div>
+        </div>
+        <div class="row m-t-1 m-b-1">
+            <div class="col-md-3">
+                <strong>{{#str}}purpose, tool_dataprivacy{{/str}}</strong>
+            </div>
+            <div class="col-md-9">
+                {{purpose}}
+            </div>
+        </div>
+    </div>
+    <div class="col-md-3 align-self-center">
+    {{#canedit}}
+        <button class="btn btn-default" {{!
+            }}data-action="edit-level-defaults" {{!
+            }}data-contextlevel="{{contextlevel}}" {{!
+            }}data-category="{{categoryid}}" {{!
+            }}data-purpose="{{purposeid}}">
+            {{#str}}edit{{/str}}
+        </button>
+    {{/canedit}}
+    </div>
+</div>

admin/tool/dataprivacy/templates/defaults_page.mustache

@@ -0,0 +1,152 @@
+{{!
+    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 tool_dataprivacy/defaults_page
+
+    Manage data registry defaults.
+
+    Classes required for JS:
+
+    Data attributes required for JS:
+
+    Context variables required for this template:
+    * contextlevel Number - The context level.
+    * modecoursecat Boolean - Whether we're displaying defaults for course categories.
+    * modecourse Boolean - Whether we're displaying defaults for courses.
+    * modemodule Boolean - Whether we're displaying defaults for activity modules.
+    * modeblock Boolean - Whether we're displaying defaults for blocks.
+    * coursecaturl String - The URL for the course category defaults tab.
+    * courseurl String - The URL for the course defaults tab.
+    * moduleurl String - The URL for the activity module defaults tab.
+    * blockurl String - The URL for the block defaults tab.
+    * purposeid Number - The purpose ID for this context level.
+    * canedit Boolean - Whether this is being rendered for editing purposes.
+    * categoryid Number - The ID of the default category for this context level.
+    * purposeid Number - The ID of the default purpose for this context level.
+    * category String - The category name.
+    * purpose String - The purpose name.
+    * otherdefaults Array - An array containing the defaults for the activity modules.
+
+    Example context (json):
+    {
+        "contextlevel": 70,
+        "modecoursecat": false,
+        "modecourse": false,
+        "modemodule": true,
+        "modeblock": false,
+        "coursecaturl": "#",
+        "courseurl": "#",
+        "moduleurl": "#",
+        "blockurl": "#",
+        "category": "Awesome default category",
+        "purpose": "Awesome default purpose",
+        "canedit": true,
+        "otherdefaults": [
+            {
+                "name": "Assignment",
+                "category": "Category for activity modules",
+                "purpose": "Assessments"
+            },
+            {
+                "name": "Forum",
+                "category": "Category for activity modules",
+                "purpose": "Social interactions"
+            }
+        ]
+    }
+}}
+
+
+<div class="card">
+    <div class="card-header">
+        <ul class="nav nav-tabs card-header-tabs">
+            <li class="nav-item">
+                <a class="nav-link {{#modecoursecat}}active{{/modecoursecat}}" href="{{coursecaturl}}">{{#str}}categories{{/str}}</a>
+            </li>
+            <li class="nav-item">
+                <a class="nav-link {{#modecourse}}active{{/modecourse}}" href="{{courseurl}}">{{#str}}courses{{/str}}</a>
+            </li>
+            <li class="nav-item">
+                <a class="nav-link {{#modemodule}}active{{/modemodule}}" href="{{moduleurl}}">{{#str}}activitymodules{{/str}}</a>
+            </li>
+            <li class="nav-item">
+                <a class="nav-link {{#modeblock}}active{{/modeblock}}" href="{{blockurl}}">{{#str}}blocks{{/str}}</a>
+            </li>
+        </ul>
+    </div>
+    <div class="card-body">
+        <div class="alert alert-primary" role="alert">
+            {{#str}}defaultsinfo, tool_dataprivacy{{/str}}
+        </div>
+        <h4 class="card-title" id="defaults-header">
+            {{#modecoursecat}}{{#str}}categories{{/str}}{{/modecoursecat}}
+            {{#modecourse}}{{#str}}courses{{/str}}{{/modecourse}}
+            {{#modemodule}}{{#str}}activitymodules{{/str}}{{/modemodule}}
+            {{#modeblock}}{{#str}}blocks{{/str}}{{/modeblock}}
+        </h4>
+        <div>
+            {{> tool_dataprivacy/defaults_display}}
+            {{#canedit}}
+                {{#modemodule}}
+                <button class="btn btn-primary" data-action="new-activity-defaults" data-contextlevel="{{contextlevel}}">
+                    {{#str}}addnewdefaults, tool_dataprivacy{{/str}}
+                </button>
+                {{/modemodule}}
+            {{/canedit}}
+            {{#modemodule}}
+            <table class="m-t-1 table table-striped">
+                <thead>
+                    <tr>
+                        <th>&nbsp;</th>
+                        <th scope="col">{{#str}}category, tool_dataprivacy{{/str}}</th>
+                        <th scope="col">{{#str}}purpose, tool_dataprivacy{{/str}}</th>
+                        {{#canedit}}
+                            <th scope="col">{{#str}}actions{{/str}}</th>
+                        {{/canedit}}
+                    </tr>
+                </thead>
+                <tbody>
+                    {{#otherdefaults}}
+                    <tr>
+                        <th scope="row">{{name}}</th>
+                        <td>{{category}}</td>
+                        <td>{{purpose}}</td>
+                        {{#canedit}}
+                            <td>
+                                <a href="#" role="button" data-action="edit-activity-defaults" data-contextlevel="{{contextlevel}}" data-activityname="{{activityname}}" data-category="{{categoryid}}" data-purpose="{{purposeid}}">
+                                    {{#pix}}t/edit, core, {{#str}}edit{{/str}}{{/pix}}
+                                </a>
+                                <a href="#" role="button" data-action="delete-activity-defaults" data-contextlevel="{{contextlevel}}" data-activityname="{{activityname}}" data-activitydisplayname="{{name}}">
+                                    {{#pix}}t/delete, core, {{#str}}delete{{/str}}{{/pix}}
+                                </a>
+                            </td>
+                        {{/canedit}}
+                    </tr>
+                    {{/otherdefaults}}
+                </tbody>
+            </table>
+            {{/modemodule}}
+        </div>
+    </div>
+</div>
+
+{{#js}}
+// Initialise the JS.
+require(['tool_dataprivacy/defaultsactions'], function(ActionsMod) {
+    ActionsMod.init();
+});
+{{/js}}

admin/tool/dataprivacy/templates/delete_activity_defaults.mustache

@@ -0,0 +1,41 @@
+{{!
+    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 tool_dataprivacy/delete_activity_defaults
+
+    Renders the confirmation.
+
+    Classes required for JS:
+
+    Data attributes required for JS:
+    * none
+
+    Context variables required for this template:
+    * activityname String - The activity name.
+
+    Example context (json):
+    {
+        "activityname": "Assignment"
+    }
+}}
+
+<div class="alert alert-warning" role="alert">
+    {{#str}}defaultswarninginfo, tool_dataprivacy{{/str}}
+</div>
+<div>
+    {{#str}}deletedefaultsconfirmation, tool_dataprivacy, {{activityname}}{{/str}}
+</div>