Add option to rename character in past chats

public/script.js

@@ -119,7 +119,6 @@ import {
     end_trim_to_sentence,
     countOccurrences,
     isOdd,
-    isElementInViewport,
     sortMoments,
     timestampToMoment,
     download,
@@ -3410,7 +3409,15 @@ async function renameCharacter() {
 
                     // Also rename as a group member
                     await renameGroupMember(oldAvatar, newAvatar, newValue);
-                    callPopup('<h3>Character renamed!</h3>Sprites folder (if any) should be renamed manually.', 'text');
+                    const renamePastChatsConfirm = await callPopup(`<h3>Character renamed!</h3>
+                    <p>Past chats will still contain the old character name. Would you like to update the character name in previous chats as well?</p>
+                    <i><b>Sprites folder (if any) should be renamed manually.</b></i>`, 'confirm');
+
+                    if (renamePastChatsConfirm) {
+                        await renamePastChats(newAvatar, newValue);
+                        await reloadCurrentChat();
+                        toastr.success('Character renamed and past chats updated!');
+                    }
                 }
                 else {
                     throw new Error('Newly renamed character was lost?');
@@ -3428,6 +3435,59 @@ async function renameCharacter() {
     }
 }
 
+async function renamePastChats(newAvatar, newValue) {
+    const pastChats = await getPastCharacterChats();
+
+    for (const { file_name } of pastChats) {
+        try {
+            const fileNameWithoutExtension = file_name.replace('.jsonl', '');
+            const getChatResponse = await fetch('/getchat', {
+                method: 'POST',
+                headers: getRequestHeaders(),
+                body: JSON.stringify({
+                    ch_name: newValue,
+                    file_name: fileNameWithoutExtension,
+                    avatar_url: newAvatar,
+                }),
+                cache: 'no-cache',
+            });
+
+            if (getChatResponse.ok) {
+                const currentChat = await getChatResponse.json();
+
+                for (const message of currentChat) {
+                    if (message.is_user || message.is_system || message.extra?.type == system_message_types.NARRATOR) {
+                        continue;
+                    }
+
+                    if (message.name !== undefined) {
+                        message.name = newValue;
+                    }
+                }
+
+                const saveChatResponse = await fetch('/savechat', {
+                    method: "POST",
+                    headers: getRequestHeaders(),
+                    body: JSON.stringify({
+                        ch_name: newValue,
+                        file_name: fileNameWithoutExtension,
+                        chat: currentChat,
+                        avatar_url: newAvatar,
+                    }),
+                    cache: 'no-cache',
+                });
+
+                if (!saveChatResponse.ok) {
+                    throw new Error('Could not save chat');
+                }
+            }
+        } catch (error) {
+            toastr.error(`Past chat could not be updated: ${file_name}`);
+            console.error(error);
+        }
+    }
+}
+
 async function saveChat(chat_name, withMetadata) {
     const metadata = { ...chat_metadata, ...(withMetadata || {}) };
     let file_name = chat_name ?? characters[this_chid].chat;