refactor(characters): drive shared UI from active character

src/stores/chat/chat-history-sync.ts

@@ -30,12 +30,9 @@ export type LocalHistorySnapshotOutput = {
 
 export type NetworkHistorySyncOutput = ReadAndSyncHistoryOutput;
 
-export function createGreetingMessage(): UiMessage {
+export function createGreetingMessage(content: string): UiMessage {
   return {
-    content:
-      "You're here! Facebook is so restrictive, " +
-      "there were things I couldn't say there. " +
-      "Finally I can relax. How was your day out?",
+    content,
     isFromAI: true,
     date: todayString(),
     isSynthetic: true,
@@ -51,9 +48,10 @@ export async function resolveHistoryCacheIdentity(
 
 export async function readLocalHistorySnapshot(
   cacheIdentity: string | null,
+  emptyChatGreeting: string,
 ): Promise<LocalHistorySnapshotOutput> {
   const chatRepo = await loadChatRepository();
-  const greetingMessage = createGreetingMessage();
+  const greetingMessage = createGreetingMessage(emptyChatGreeting);
 
   const localResult = cacheIdentity
     ? await chatRepo.getLocalMessages(cacheIdentity)
@@ -82,10 +80,11 @@ export async function syncNetworkHistory(
   characterId: string,
   localCount: number,
   cacheIdentity: string | null,
+  emptyChatGreeting: string,
   signal?: AbortSignal,
 ): Promise<NetworkHistorySyncOutput | null> {
   const chatRepo = await loadChatRepository();
-  const greetingMessage = createGreetingMessage();
+  const greetingMessage = createGreetingMessage(emptyChatGreeting);
 
   const networkResult = await chatRepo.getHistory(
     characterId,
@@ -149,14 +148,19 @@ export async function syncNetworkHistory(
  */
 export async function readAndSyncHistory(
   characterId: string,
+  emptyChatGreeting: string,
   signal?: AbortSignal,
 ): Promise<ReadAndSyncHistoryOutput> {
   const cacheIdentity = await resolveHistoryCacheIdentity(characterId);
-  const localSnapshot = await readLocalHistorySnapshot(cacheIdentity);
+  const localSnapshot = await readLocalHistorySnapshot(
+    cacheIdentity,
+    emptyChatGreeting,
+  );
   const networkSnapshot = await syncNetworkHistory(
     characterId,
     localSnapshot.localCount,
     cacheIdentity,
+    emptyChatGreeting,
     signal,
   );
   if (networkSnapshot) return networkSnapshot;