Require authentication to participate in chat (#4762)

* feat(chat): require authentication to participate in chat

* fix: it's pretty much impossible to bypass the auth requirement, addressing review feedback anyway

* feat(chat): render chat text input as disabled if chat auth is required

* Commit updated API documentation

---------

Co-authored-by: Owncast <owncast@owncast.online>

web/pages/admin/config-chat.tsx

@@ -19,6 +19,7 @@ import {
   FIELD_PROPS_ENABLE_CHAT_SLUR_FILTER,
   CHAT_ESTABLISHED_USER_MODE,
   FIELD_PROPS_DISABLE_CHAT,
+  FIELD_PROPS_CHAT_REQUIRE_AUTHENTICATION,
   postConfigUpdateToAPI,
   RESET_TIMEOUT,
   TEXTFIELD_PROPS_CHAT_FORBIDDEN_USERNAMES,
@@ -47,6 +48,7 @@ export default function ConfigChat() {
     chatEstablishedUserMode,
     chatSpamProtectionEnabled,
     chatSlurFilterEnabled,
+    chatRequireAuthentication,
   } = serverConfig;
   const { welcomeMessage } = instanceDetails;
 
@@ -77,6 +79,10 @@ export default function ConfigChat() {
     handleFieldChange({ fieldName: 'chatSlurFilterEnabled', value: enabled });
   }
 
+  function handleChatRequireAuthenticationChange(enabled: boolean) {
+    handleFieldChange({ fieldName: 'chatRequireAuthentication', value: enabled });
+  }
+
   function resetForbiddenUsernameState() {
     setForbiddenUsernameSaveState(null);
   }
@@ -169,6 +175,7 @@ export default function ConfigChat() {
       chatEstablishedUserMode,
       chatSpamProtectionEnabled,
       chatSlurFilterEnabled,
+      chatRequireAuthentication,
     });
   }, [serverConfig]);
 
@@ -250,6 +257,12 @@ export default function ConfigChat() {
               checked={formDataValues.chatSlurFilterEnabled}
               onChange={handleChatSlurFilterChange}
             />
+            <ToggleSwitch
+              fieldName="chatRequireAuthentication"
+              {...FIELD_PROPS_CHAT_REQUIRE_AUTHENTICATION}
+              checked={formDataValues.chatRequireAuthentication}
+              onChange={handleChatRequireAuthenticationChange}
+            />
           </div>
         </Col>
       </Row>