settings: Fix updating realm join restrictions setting.

This commit fixes the bug when updating
"Restrict email domains of new users?" setting by
adding data-setting-widget-type attribute to the select
element as get_input_element_value now expects every
element to have that attribute after 64c8262.

Due to this change, we also need to update the code in
populate_data_for_request function to not send invalid
parameter in the request. This change resulted in some
refactoring which now helps in not passing in the
"disallow_disposable_email_addresses" and
"email_restricted_to_domains" when these fields are
not changed.

web/src/settings_components.ts

@@ -901,6 +901,32 @@ export function check_property_changed(
     return current_val !== proposed_val;
 }
 
+function get_request_data_for_org_join_restrictions(selected_val: string): {
+    disallow_disposable_email_addresses: boolean;
+    emails_restricted_to_domains: boolean;
+} {
+    switch (selected_val) {
+        case "only_selected_domain": {
+            return {
+                emails_restricted_to_domains: true,
+                disallow_disposable_email_addresses: false,
+            };
+        }
+        case "no_disposable_email": {
+            return {
+                emails_restricted_to_domains: false,
+                disallow_disposable_email_addresses: true,
+            };
+        }
+        default: {
+            return {
+                disallow_disposable_email_addresses: false,
+                emails_restricted_to_domains: false,
+            };
+        }
+    }
+}
+
 export function populate_data_for_request(
     $subsection_elem: JQuery,
     for_realm_default_settings: boolean,
@@ -966,6 +992,14 @@ export function populate_data_for_request(
                     });
                     continue;
                 }
+
+                if (property_name === "org_join_restrictions") {
+                    data = {
+                        ...data,
+                        ...get_request_data_for_org_join_restrictions(input_value.toString()),
+                    };
+                    continue;
+                }
                 data[property_name] = input_value;
             }
         }

web/src/settings_org.js

@@ -880,24 +880,6 @@ export function register_save_discard_widget_handlers(
         let data = {};
 
         switch (subsection) {
-            case "join_settings": {
-                const org_join_restrictions = $("#id_realm_org_join_restrictions").val();
-                switch (org_join_restrictions) {
-                    case "only_selected_domain":
-                        data.emails_restricted_to_domains = true;
-                        data.disallow_disposable_email_addresses = false;
-                        break;
-                    case "no_disposable_email":
-                        data.emails_restricted_to_domains = false;
-                        data.disallow_disposable_email_addresses = true;
-                        break;
-                    case "no_restriction":
-                        data.disallow_disposable_email_addresses = false;
-                        data.emails_restricted_to_domains = false;
-                        break;
-                }
-                break;
-            }
             case "auth_settings":
                 data = {};
                 data.authentication_methods = JSON.stringify(

web/templates/settings/organization_permissions_admin.hbs

@@ -30,7 +30,7 @@
 
                 <div class="input-group">
                     <label for="realm_org_join_restrictions" class="settings-field-label">{{t "Restrict email domains of new users?" }}</label>
-                    <select name="realm_org_join_restrictions" id="id_realm_org_join_restrictions" class="prop-element settings_select bootstrap-focus-style">
+                    <select name="realm_org_join_restrictions" id="id_realm_org_join_restrictions" class="prop-element settings_select bootstrap-focus-style" data-setting-widget-type="string">
                         <option value="no_restriction">{{t "No restrictions" }}</option>
                         <option value="no_disposable_email">{{t "Don’t allow disposable email addresses" }}</option>
                         <option value="only_selected_domain">{{t "Restrict to a list of domains" }}</option>