settings: Add moderators and members option to msg-delete dropdown.

This commit adds moderators, full members and members options to
the delete_own_message_policy dropdown.

frontend_tests/node_tests/message_edit.js

@@ -122,10 +122,9 @@ run_test("get_editability", ({override}) => {
     assert.equal(message_edit.is_topic_editable(message), false);
 });
 
-run_test("get_deletability", () => {
+run_test("get_deletability", ({override}) => {
     page_params.is_admin = true;
-    page_params.realm_delete_own_message_policy =
-        settings_config.delete_own_message_policy_values.by_admins_only.code;
+    override(settings_data, "user_can_delete_own_message", () => false);
     page_params.realm_message_content_delete_limit_seconds = null;
     const message = {
         sent_by_me: false,
@@ -146,8 +145,7 @@ run_test("get_deletability", () => {
     message.locally_echoed = false;
     assert.equal(message_edit.get_deletability(message), false);
 
-    page_params.realm_delete_own_message_policy =
-        settings_config.delete_own_message_policy_values.by_everyone.code;
+    override(settings_data, "user_can_delete_own_message", () => true);
     assert.equal(message_edit.get_deletability(message), true);
 
     const now = new Date();

frontend_tests/node_tests/settings_data.js

@@ -243,6 +243,12 @@ test_message_policy(
     settings_data.user_can_edit_topic_of_any_message,
 );
 
+test_message_policy(
+    "user_can_delete_own_message",
+    "realm_delete_own_message_policy",
+    settings_data.user_can_delete_own_message,
+);
+
 run_test("using_dark_theme", () => {
     user_settings.color_scheme = settings_config.color_scheme_values.night.code;
     assert.equal(settings_data.using_dark_theme(), true);

frontend_tests/node_tests/settings_org.js

@@ -576,7 +576,7 @@ function test_discard_changes_button(discard_changes) {
     page_params.realm_allow_message_editing = true;
     page_params.realm_message_content_edit_limit_seconds = 3600;
     page_params.realm_delete_own_message_policy =
-        settings_config.delete_own_message_policy_values.by_everyone.code;
+        settings_config.common_message_policy_values.by_everyone.code;
     page_params.realm_message_content_delete_limit_seconds = 120;
 
     const allow_edit_history = $("#id_realm_allow_edit_history").prop("checked", false);

static/js/admin.js

@@ -137,6 +137,9 @@ export function build_page() {
         realm_invite_required: page_params.realm_invite_required,
         can_edit_user_groups: settings_data.user_can_edit_user_groups(),
         policy_values: settings_config.common_policy_values,
+        realm_delete_own_message_policy: page_params.realm_delete_own_message_policy,
+        DELETE_OWN_MESSAGE_POLICY_ADMINS_ONLY:
+            settings_config.common_message_policy_values.by_admins_only.code,
         ...settings_org.get_organization_settings_options(),
         demote_inactive_streams_values: settings_config.demote_inactive_streams_values,
         color_scheme_values: settings_config.color_scheme_values,

static/js/message_edit.js

@@ -28,7 +28,6 @@ import * as overlays from "./overlays";
 import {page_params} from "./page_params";
 import * as resize from "./resize";
 import * as rows from "./rows";
-import * as settings_config from "./settings_config";
 import * as settings_data from "./settings_data";
 import * as stream_bar from "./stream_bar";
 import * as stream_data from "./stream_data";
@@ -168,10 +167,7 @@ export function get_deletability(message) {
     if (message.locally_echoed) {
         return false;
     }
-    if (
-        page_params.realm_delete_own_message_policy ===
-        settings_config.delete_own_message_policy_values.by_admins_only.code
-    ) {
+    if (!settings_data.user_can_delete_own_message()) {
         return false;
     }
 

static/js/page_params.ts

@@ -16,6 +16,7 @@ export const page_params: {
     realm_add_custom_emoji_policy: number;
     realm_avatar_changes_disabled: boolean;
     realm_create_stream_policy: number;
+    realm_delete_own_message_policy: number;
     realm_edit_topic_policy: number;
     realm_email_address_visibility: number;
     realm_invite_to_realm_policy: number;

static/js/settings_config.ts

@@ -255,19 +255,6 @@ export const common_message_policy_values = {
     },
 };
 
-export const delete_own_message_policy_values = {
-    by_everyone: {
-        order: 1,
-        code: 5,
-        description: $t({defaultMessage: "Admins, members and guests"}),
-    },
-    by_admins_only: {
-        order: 2,
-        code: 2,
-        description: $t({defaultMessage: "Admins only"}),
-    },
-};
-
 const time_limit_dropdown_values = new Map([
     [
         "any_time",

static/js/settings_data.ts

@@ -121,6 +121,13 @@ function user_has_permission(policy_value: number): boolean {
         return false;
     }
 
+    /* At present, by_everyone is not present in common_policy_values,
+     * but we include a check for it here, so that code using
+     * common_message_policy_values or other supersets can use this function. */
+    if (policy_value === settings_config.common_message_policy_values.by_everyone.code) {
+        return true;
+    }
+
     if (page_params.is_guest) {
         return false;
     }
@@ -192,6 +199,10 @@ export function user_can_edit_topic_of_any_message(): boolean {
     return user_has_permission(page_params.realm_edit_topic_policy);
 }
 
+export function user_can_delete_own_message(): boolean {
+    return user_has_permission(page_params.realm_delete_own_message_policy);
+}
+
 export function using_dark_theme(): boolean {
     if (user_settings.color_scheme === settings_config.color_scheme_values.night.code) {
         return true;

static/js/settings_org.js

@@ -109,9 +109,6 @@ export function get_organization_settings_options() {
     options.invite_to_realm_policy_values = get_sorted_options_list(
         settings_config.invite_to_realm_policy_values,
     );
-    options.delete_own_message_policy_values = get_sorted_options_list(
-        settings_config.delete_own_message_policy_values,
-    );
     return options;
 }
 
@@ -249,18 +246,32 @@ function set_msg_edit_limit_dropdown() {
     settings_ui.disable_sub_setting_onchange(value !== "never", "id_realm_edit_topic_policy", true);
 }
 
+function message_delete_limit_setting_enabled() {
+    // This function is used to check whether the time-limit setting
+    // should be enabled. The setting is disabled when delete_own_message_policy
+    // is set to 'admins only' as admins can delete messages irrespective of
+    // time limit.
+    if (
+        page_params.realm_delete_own_message_policy ===
+        settings_config.common_message_policy_values.by_admins_only.code
+    ) {
+        return false;
+    }
+    return true;
+}
+
 function set_delete_own_message_policy_dropdown() {
     const value = get_property_value("realm_delete_own_message_policy");
     $("#id_realm_delete_own_message_policy").val(value);
     settings_ui.disable_sub_setting_onchange(
-        value !== settings_config.delete_own_message_policy_values.by_admins_only.code,
+        message_delete_limit_setting_enabled(),
         "id_realm_msg_delete_limit_setting",
         true,
     );
     const limit_value = get_property_value("realm_msg_delete_limit_setting");
     if (limit_value === "custom_limit") {
         settings_ui.disable_sub_setting_onchange(
-            value !== settings_config.delete_own_message_policy_values.by_admins_only.code,
+            message_delete_limit_setting_enabled(),
             "id_realm_message_content_delete_limit_minutes",
             true,
         );

static/templates/settings/organization_permissions_admin.hbs

@@ -164,7 +164,7 @@
                           aria-hidden="true" data-tippy-content="{{t 'Administrators can delete any message.' }}"></i>
                     </label>
                     <select name="realm_delete_own_message_policy" id="id_realm_delete_own_message_policy" class="prop-element" data-setting-widget-type="number">
-                        {{> dropdown_options_widget option_values=delete_own_message_policy_values}}
+                        {{> dropdown_options_widget option_values=common_message_policy_values}}
                     </select>
                 </div>