Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 | "use client";
import type { UIMessage } from "ai";
import { useEffect, useMemo, useRef, useState } from "react";
import { CHAT_THREAD_COPY } from "@/constants/chat";
import { CHAT_STORAGE_KEYS } from "@/constants/storage";
import type { AIProviderName } from "@/lib/ai-provider";
import type { AppRole } from "@/lib/auth/session";
import type { ChatThread, SetChatMessages } from "@/types/thread";
import { local } from "@/utils/storage";
import { getTextParts } from "@/utils/message";
export type { ChatThread } from "@/types/thread";
type RoleThreadData = {
threads: ChatThread[];
activeId: string;
};
type StoredData = Record<AppRole, RoleThreadData>;
function createThreadId() {
if (typeof crypto !== "undefined" && "randomUUID" in crypto) {
return crypto.randomUUID();
}
return `${CHAT_THREAD_COPY.idPrefix}-${Date.now()}`;
}
function truncate(text: string, maxLength: number) {
return text.length > maxLength ? `${text.slice(0, maxLength)}…` : text;
}
function deriveTitle(messages: UIMessage[]) {
const firstUserText = messages.find((m) => m.role === "user");
const text = firstUserText ? getTextParts(firstUserText).join(" ").trim() : "";
return text
? truncate(text, CHAT_THREAD_COPY.titleMaxLength)
: CHAT_THREAD_COPY.defaultTitle;
}
function derivePreview(messages: UIMessage[]) {
const lastMessage = [...messages].reverse().find((m) => {
const text = getTextParts(m).join(" ").trim();
return text.length > 0;
});
if (!lastMessage) return CHAT_THREAD_COPY.emptyPreview;
return truncate(
getTextParts(lastMessage).join(" ").trim(),
CHAT_THREAD_COPY.previewMaxLength,
);
}
function createEmptyThread(provider: AIProviderName): ChatThread {
const now = new Date().toISOString();
return {
id: createThreadId(),
title: CHAT_THREAD_COPY.defaultTitle,
preview: CHAT_THREAD_COPY.emptyPreview,
createdAt: now,
updatedAt: now,
provider,
messages: [],
};
}
function isChatThread(candidate: unknown): candidate is ChatThread {
if (!candidate || typeof candidate !== "object") return false;
const t = candidate as Partial<ChatThread>;
return (
typeof t.id === "string" &&
typeof t.title === "string" &&
typeof t.preview === "string" &&
typeof t.createdAt === "string" &&
typeof t.updatedAt === "string" &&
(t.provider === "openai" || t.provider === "ollama") &&
Array.isArray(t.messages)
);
}
function parseStoredData(raw: string | null, provider: AIProviderName): StoredData {
const defaultData = (): RoleThreadData => {
const empty = createEmptyThread(provider);
return { threads: [empty], activeId: empty.id };
};
const fallback: StoredData = {
user: defaultData(),
manager: defaultData(),
};
if (!raw) return fallback;
try {
const parsed = JSON.parse(raw) as unknown;
if (!parsed || typeof parsed !== "object") return fallback;
const candidate = parsed as Partial<Record<AppRole, unknown>>;
const extract = (role: AppRole): RoleThreadData => {
const data = candidate[role] as Partial<RoleThreadData> | undefined;
if (!data || !Array.isArray(data.threads) || typeof data.activeId !== "string") {
return defaultData();
}
const validThreads = data.threads.filter(isChatThread);
if (validThreads.length === 0) return defaultData();
const activeId = validThreads.some(t => t.id === data.activeId)
? data.activeId
: validThreads[0].id;
return { threads: validThreads, activeId };
};
return {
user: extract("user"),
manager: extract("manager"),
};
} catch {
return fallback;
}
}
function updateThreadInList(
threads: ChatThread[],
id: string,
updates: Partial<ChatThread>,
): ChatThread[] {
return threads.map((t) => (t.id === id ? { ...t, ...updates } : t));
}
export function useChatThreads({
messages,
setMessages,
provider,
role,
}: {
messages: UIMessage[];
setMessages: SetChatMessages;
provider: AIProviderName;
role: AppRole;
}) {
const [data, setData] = useState<StoredData>(() =>
parseStoredData(local.read(CHAT_STORAGE_KEYS.threadsByRole), provider),
);
const previousRoleRef = useRef(role);
const isInternalChangeRef = useRef(false);
// Sync messages from useChat to the active thread in state
useEffect(() => {
if (isInternalChangeRef.current) return;
// eslint-disable-next-line react-hooks/set-state-in-effect
setData((prev) => {
const roleData = prev[role];
const activeThread = roleData.threads.find((t) => t.id === roleData.activeId);
if (!activeThread) return prev;
const hasMessages = messages.length > 0;
const nextThread: ChatThread = {
...activeThread,
messages,
title: hasMessages ? deriveTitle(messages) : activeThread.title,
preview: hasMessages ? derivePreview(messages) : activeThread.preview,
updatedAt: hasMessages ? new Date().toISOString() : activeThread.updatedAt,
provider,
};
// Only update if something meaningful changed to avoid loops
if (JSON.stringify(activeThread.messages) === JSON.stringify(messages) && activeThread.provider === provider) {
return prev;
}
return {
...prev,
[role]: {
...roleData,
threads: updateThreadInList(roleData.threads, roleData.activeId, nextThread),
},
};
});
}, [messages, provider, role]);
// Handle role switching
useEffect(() => {
if (previousRoleRef.current === role) return;
previousRoleRef.current = role;
// Load messages for the new role's active thread
const nextRoleData = data[role];
const nextActiveThread = nextRoleData.threads.find((t) => t.id === nextRoleData.activeId);
if (nextActiveThread) {
isInternalChangeRef.current = true;
setMessages(nextActiveThread.messages);
// Reset ref after a tick to allow messages state to stabilize
setTimeout(() => {
isInternalChangeRef.current = false;
}, 0);
}
}, [role, data, setMessages]);
// Persist to storage
useEffect(() => {
local.write(CHAT_STORAGE_KEYS.threadsByRole, JSON.stringify(data));
}, [data]);
const activeThread = useMemo(() => {
const roleData = data[role];
return roleData.threads.find((t) => t.id === roleData.activeId)!;
}, [data, role]);
const allThreads = useMemo(() => data[role].threads, [data, role]);
function switchThread(id: string) {
if (id === data[role].activeId) return;
setData((prev) => ({
...prev,
[role]: { ...prev[role], activeId: id },
}));
const nextThread = data[role].threads.find((t) => t.id === id);
if (nextThread) {
isInternalChangeRef.current = true;
setMessages(nextThread.messages);
setTimeout(() => {
isInternalChangeRef.current = false;
}, 0);
}
}
function createNewThread() {
const newThread = createEmptyThread(provider);
setData((prev) => ({
...prev,
[role]: {
threads: [newThread, ...prev[role].threads],
activeId: newThread.id,
},
}));
isInternalChangeRef.current = true;
setMessages([]);
setTimeout(() => {
isInternalChangeRef.current = false;
}, 0);
}
function deleteThread(id: string) {
setData((prev) => {
const roleData = prev[role];
const nextThreads = roleData.threads.filter((t) => t.id !== id);
if (nextThreads.length === 0) {
const empty = createEmptyThread(provider);
return {
...prev,
[role]: { threads: [empty], activeId: empty.id }
};
}
let nextActiveId = roleData.activeId;
if (id === roleData.activeId) {
nextActiveId = nextThreads[0].id;
}
return {
...prev,
[role]: { threads: nextThreads, activeId: nextActiveId }
};
});
// If we deleted the active thread, we need to update messages
if (id === data[role].activeId) {
const roleData = data[role];
const nextThreads = roleData.threads.filter((t) => t.id !== id);
const nextActiveThread = nextThreads.length > 0 ? nextThreads[0] : null;
isInternalChangeRef.current = true;
setMessages(nextActiveThread ? nextActiveThread.messages : []);
setTimeout(() => {
isInternalChangeRef.current = false;
}, 0);
}
}
function clearThread() {
// This now effectively means "delete all threads for this role and start fresh"
const empty = createEmptyThread(provider);
setData((prev) => ({
...prev,
[role]: { threads: [empty], activeId: empty.id }
}));
setMessages([]);
}
return {
activeThread,
allThreads,
switchThread,
createNewThread,
deleteThread,
clearThread
};
}
|