settings: Add functions to discard complete subsection.

This commit adds new functions which will be used to discard
changes for all the settings in a subsection when clicking
on discard button. This change will help in avoiding code
duplication when they will be used to discard changes in
a subsection if some other user changed a setting in the
same subsection.

web/src/settings_org.js

@@ -639,6 +639,38 @@ export function discard_realm_default_property_element_changes(elem) {
     update_dependent_subsettings(property_name);
 }
 
+function discard_realm_settings_subsection_changes($subsection) {
+    for (const elem of settings_components.get_subsection_property_elements($subsection)) {
+        discard_realm_property_element_changes(elem);
+    }
+    const $save_btn_controls = $subsection.find(".save-button-controls");
+    settings_components.change_save_button_state($save_btn_controls, "discarded");
+}
+
+export function discard_stream_settings_subsection_changes($subsection, sub) {
+    for (const elem of settings_components.get_subsection_property_elements($subsection)) {
+        discard_stream_property_element_changes(elem, sub);
+    }
+    const $save_btn_controls = $subsection.find(".save-button-controls");
+    settings_components.change_save_button_state($save_btn_controls, "discarded");
+}
+
+export function discard_group_settings_subsection_changes($subsection, group) {
+    for (const elem of settings_components.get_subsection_property_elements($subsection)) {
+        discard_group_property_element_changes(elem, group);
+    }
+    const $save_btn_controls = $subsection.find(".save-button-controls");
+    settings_components.change_save_button_state($save_btn_controls, "discarded");
+}
+
+function discard_realm_default_settings_subsection_changes($subsection) {
+    for (const elem of settings_components.get_subsection_property_elements($subsection)) {
+        discard_realm_default_property_element_changes(elem);
+    }
+    const $save_btn_controls = $subsection.find(".save-button-controls");
+    settings_components.change_save_button_state($save_btn_controls, "discarded");
+}
+
 export function deactivate_organization(e) {
     e.preventDefault();
     e.stopPropagation();
@@ -872,15 +904,11 @@ export function register_save_discard_widget_handlers(
         e.preventDefault();
         e.stopPropagation();
         const $subsection = $(e.target).closest(".settings-subsection-parent");
-        for (const elem of settings_components.get_subsection_property_elements($subsection)) {
         if (for_realm_default_settings) {
-                discard_realm_default_property_element_changes(elem);
+            discard_realm_default_settings_subsection_changes($subsection);
         } else {
-                discard_realm_property_element_changes(elem);
+            discard_realm_settings_subsection_changes($subsection);
         }
-        }
-        const $save_btn_controls = $(e.target).closest(".save-button-controls");
-        settings_components.change_save_button_state($save_btn_controls, "discarded");
     });
 
     $container.on("click", ".subsection-header .subsection-changes-save button", (e) => {

web/src/stream_edit.js

@@ -756,12 +756,8 @@ export function initialize() {
             const sub = sub_store.get(stream_id);
 
             const $subsection = $(e.target).closest(".settings-subsection-parent");
-            for (const elem of settings_components.get_subsection_property_elements($subsection)) {
+            settings_org.discard_stream_settings_subsection_changes($subsection, sub);
-                settings_org.discard_stream_property_element_changes(elem, sub);
-            }
             stream_ui_updates.update_default_stream_and_stream_privacy_state($subsection);
-            const $save_btn_controls = $(e.target).closest(".save-button-controls");
-            settings_components.change_save_button_state($save_btn_controls, "discarded");
         },
     );
 }

web/src/user_group_edit.js

@@ -916,11 +916,7 @@ export function initialize() {
             const group = user_groups.get_user_group_from_id(group_id);
 
             const $subsection = $(e.target).closest(".settings-subsection-parent");
-            for (const elem of settings_components.get_subsection_property_elements($subsection)) {
+            settings_org.discard_group_settings_subsection_changes($subsection, group);
-                settings_org.discard_group_property_element_changes(elem, group);
-            }
-            const $save_btn_controls = $(e.target).closest(".save-button-controls");
-            settings_components.change_save_button_state($save_btn_controls, "discarded");
         },
     );
 }

web/tests/settings_org.test.js

@@ -444,15 +444,20 @@ function test_discard_changes_button(discard_changes) {
     );
 
     const $discard_button_parent = $(".settings-subsection-parent");
-    $discard_button_parent.find = () => [
+    $discard_button_parent.set_find_results(".prop-element", [
         $allow_edit_history,
         $msg_edit_limit_setting,
         $msg_delete_limit_setting,
         $edit_topic_policy,
-    ];
+    ]);
 
-    const {$discard_button, props} = createSaveButtons("msg-editing");
+    const {$discard_button, $save_button_controls, props} = createSaveButtons("msg-editing");
-    $discard_button.closest = (selector) => $(selector);
+    $discard_button.closest = (selector) => {
+        assert.equal(selector, ".settings-subsection-parent");
+        return $discard_button_parent;
+    };
+
+    $discard_button_parent.set_find_results(".save-button-controls", $save_button_controls);
 
     discard_changes(ev);