Preserve neutral chat on reloading with commands (#2848)

* Preserve neutral chat on reloading

* Restore neutral on deleting character with bulk

public/script.js

@@ -225,7 +225,7 @@ import { getBackgrounds, initBackgrounds, loadBackgroundSettings, background_set
 import { hideLoader, showLoader } from './scripts/loader.js';
 import { BulkEditOverlay, CharacterContextMenu } from './scripts/BulkEditOverlay.js';
 import { loadFeatherlessModels, loadMancerModels, loadOllamaModels, loadTogetherAIModels, loadInfermaticAIModels, loadOpenRouterModels, loadVllmModels, loadAphroditeModels, loadDreamGenModels, initTextGenModels, loadTabbyModels } from './scripts/textgen-models.js';
-import { appendFileContent, hasPendingFileAttachment, populateFileAttachment, decodeStyleTags, encodeStyleTags, isExternalMediaAllowed, getCurrentEntityId } from './scripts/chats.js';
+import { appendFileContent, hasPendingFileAttachment, populateFileAttachment, decodeStyleTags, encodeStyleTags, isExternalMediaAllowed, getCurrentEntityId, preserveNeutralChat, restoreNeutralChat } from './scripts/chats.js';
 import { initPresetManager } from './scripts/preset-manager.js';
 import { MacrosParser, evaluateMacros, getLastMessageId } from './scripts/macros.js';
 import { currentUser, setUserControls } from './scripts/user.js';
@@ -1846,6 +1846,7 @@ export async function deleteLastMessage() {
 }
 
 export async function reloadCurrentChat() {
+    preserveNeutralChat();
     await clearChat();
     chat.length = 0;
 
@@ -1857,6 +1858,7 @@ export async function reloadCurrentChat() {
     }
     else {
         resetChatState();
+        restoreNeutralChat();
         await getCharacters();
         await printMessages();
         await eventSource.emit(event_types.CHAT_CHANGED, getCurrentChatId());
@@ -5700,10 +5702,10 @@ export function deactivateSendButtons() {
 }
 
 export function resetChatState() {
+    // replaces deleted charcter name with system user since it will be displayed next.
+    name2 = (this_chid === undefined && neutralCharacterName) ? neutralCharacterName : systemUserName;
     //unsets expected chid before reloading (related to getCharacters/printCharacters from using old arrays)
     this_chid = undefined;
-    // replaces deleted charcter name with system user since it will be displayed next.
-    name2 = systemUserName;
     // sets up system user to tell user about having deleted a character
     chat.splice(0, chat.length, ...SAFETY_CHAT);
     // resets chat metadata
@@ -8947,15 +8949,12 @@ export async function deleteCharacter(characterKey, { deleteChats = true } = {})
  * It also ensures to save the settings after all the operations.
  */
 async function removeCharacterFromUI() {
+    preserveNeutralChat();
     await clearChat();
-    $('#character_cross').click();
-    this_chid = undefined;
-    characters.length = 0;
-    name2 = systemUserName;
-    chat.splice(0, chat.length, ...SAFETY_CHAT);
-    chat_metadata = {};
+    $('#character_cross').trigger('click');
+    resetChatState();
     $(document.getElementById('rm_button_selected_ch')).children('h2').text('');
-    this_chid = undefined;
+    restoreNeutralChat();
     await getCharacters();
     await printMessages();
     saveSettingsDebounced();

public/scripts/chats.js

@@ -19,6 +19,8 @@ import {
     this_chid,
     saveChatConditional,
     chat_metadata,
+    neutralCharacterName,
+    updateChatMetadata,
 } from '../script.js';
 import { selected_group } from './group-chats.js';
 import { power_user } from './power-user.js';
@@ -1352,6 +1354,32 @@ async function verifyAttachmentsForSource(source) {
     }
 }
 
+const NEUTRAL_CHAT_KEY = 'neutralChat';
+
+export function preserveNeutralChat() {
+    if (this_chid !== undefined || selected_group || name2 !== neutralCharacterName) {
+        return;
+    }
+
+    sessionStorage.setItem(NEUTRAL_CHAT_KEY, JSON.stringify({ chat, chat_metadata }));
+}
+
+export function restoreNeutralChat() {
+    if (this_chid !== undefined || selected_group || name2 !== neutralCharacterName) {
+        return;
+    }
+
+    const neutralChat = sessionStorage.getItem(NEUTRAL_CHAT_KEY);
+    if (!neutralChat) {
+        return;
+    }
+
+    const { chat: neutralChatData, chat_metadata: neutralChatMetadata } = JSON.parse(neutralChat);
+    chat.splice(0, chat.length, ...neutralChatData);
+    updateChatMetadata(neutralChatMetadata, true);
+    sessionStorage.removeItem(NEUTRAL_CHAT_KEY);
+}
+
 /**
  * Registers a file converter function.
  * @param {string} mimeType MIME type