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computed,
reactive,
shallowRef,
} from "vue";
import { defineStore } from "pinia";
import {
createChatWorkspaceApi,
createChatWorkspaceController,
createChatWorkspaceState,
type BusinessId,
type ChatApi,
type ChatConversation,
type ChatMessage,
type ChatMessagePage,
type ChatWebSocketTicket,
type ChatWorkspaceController,
type ChatWorkspaceState,
type PendingChatConversation,
type PendingChatSend,
} from "@plain-journal/foundation";
const apiBaseUrl = import.meta.env.VITE_API_BASE_URL?.trim() ?? "";
const PENDING_SEND_KEY = "plain-journal:customer-chat-pending-send:v1";
const PENDING_CONVERSATION_KEY = "plain-journal:customer-chat-pending-conversation:v1";
export interface ChatAccessContext {
authenticated: boolean;
ownerId: BusinessId | null;
accessToken: string | null;
}
interface CustomerChatWorkspace {
ownerId: BusinessId;
accessToken: string;
state: ChatWorkspaceState;
controller: ChatWorkspaceController;
}
export class ChatAccessChangedError extends Error {
constructor() {
super("账户或会话已切换，旧的 Chat 请求结果不会写入当前页面。");
this.name = "ChatAccessChangedError";
}
}
export class ChatOwnershipMismatchError extends Error {
constructor() {
super("Chat 响应包含不属于当前账户的会话，页面已拒绝展示。");
this.name = "ChatOwnershipMismatchError";
}
}
export class ChatContractError extends Error {
constructor(message: string) {
super(message);
this.name = "ChatContractError";
}
}
function isActiveContext(context: ChatAccessContext): context is {
authenticated: true;
ownerId: BusinessId;
accessToken: string;
} {
return context.authenticated
&& typeof context.ownerId === "string"
&& context.ownerId.length > 0
&& typeof context.accessToken === "string"
&& context.accessToken.length > 0;
}
function validateConversation(
value: ChatConversation,
ownerId: BusinessId,
): ChatConversation {
if (
typeof value.id !== "string"
|| typeof value.customerId !== "string"
|| value.customerId !== ownerId
) {
throw new ChatOwnershipMismatchError();
}
Iif (!["OPEN", "CLOSED"].includes(value.status)) {
throw new ChatContractError(
`Chat 返回了未识别会话状态 ${value.status}，页面不会猜测可写性。`,
);
}
return value;
}
function validateMessage(
value: ChatMessage,
conversationId: BusinessId,
): ChatMessage {
if (
typeof value.id !== "string"
|| typeof value.conversationId !== "string"
|| value.conversationId !== conversationId
|| typeof value.senderId !== "string"
|| typeof value.clientMessageId !== "string"
) {
throw new ChatContractError("Chat 返回了无法安全归属的消息事实。");
}
if (value.attachments.some((attachment) => typeof attachment.id !== "string")) {
throw new ChatContractError("Chat 附件响应包含非字符串业务 ID，页面已拒绝展示。");
}
return value;
}
function validateMessagePage(
page: ChatMessagePage,
conversationId: BusinessId,
): ChatMessagePage {
return {
...page,
items: page.items.map((item) => validateMessage(item, conversationId)),
};
}
function validateTicket(ticket: ChatWebSocketTicket): ChatWebSocketTicket {
if (
!ticket.ticket
|| ticket.targetPath !== "/ws/chat"
|| ticket.queryParameter !== "ticket"
) {
throw new ChatContractError(
"Chat 实时票据的目标路径或查询参数不符合浏览器握手契约。",
);
}
return ticket;
}
function ownedCustomerApi(
ownerId: BusinessId,
accessToken: string,
): ChatApi {
const api = createChatWorkspaceApi(() => accessToken, apiBaseUrl);
return {
async createConversation(input) {
return validateConversation(await api.createConversation(input), ownerId);
},
async conversations(limit) {
return (await api.conversations(limit))
.map((value) => validateConversation(value, ownerId));
},
async conversation(conversationId) {
return validateConversation(
await api.conversation(conversationId),
ownerId,
);
},
async claimConversation(conversationId) {
return validateConversation(
await api.claimConversation(conversationId),
ownerId,
);
},
async closeConversation(conversationId) {
return validateConversation(
await api.closeConversation(conversationId),
ownerId,
);
},
async messages(conversationId, beforeSequence, size) {
return validateMessagePage(
await api.messages(conversationId, beforeSequence, size),
conversationId,
);
},
async sendMessage(conversationId, input) {
const message = validateMessage(
await api.sendMessage(conversationId, input),
conversationId,
);
if (message.senderId !== ownerId) {
throw new ChatOwnershipMismatchError();
}
return message;
},
async markRead(conversationId, lastReadMessageId) {
const fact = await api.markRead(conversationId, lastReadMessageId);
if (
fact.conversationId !== conversationId
|| typeof fact.lastReadMessageId !== "string"
) {
throw new ChatContractError("Chat 已读回执无法归属到当前会话。");
}
return fact;
},
async createWebSocketTicket() {
return validateTicket(await api.createWebSocketTicket());
},
};
}
export const useCustomerChatStore = defineStore("customer-chat", () => {
const workspace = shallowRef<CustomerChatWorkspace | null>(null);
function createWorkspace(
ownerId: BusinessId,
accessToken: string,
): CustomerChatWorkspace {
const state = reactive(createChatWorkspaceState({
pendingSendStorageKey: PENDING_SEND_KEY,
pendingConversationStorageKey: PENDING_CONVERSATION_KEY,
})) as ChatWorkspaceState;
const controller = createChatWorkspaceController({
state,
api: ownedCustomerApi(ownerId, accessToken),
currentUserId: () => ownerId,
pendingSendStorageKey: PENDING_SEND_KEY,
pendingConversationStorageKey: PENDING_CONVERSATION_KEY,
apiBaseUrl,
});
return {
ownerId,
accessToken,
state,
controller,
};
}
function synchronizeAccess(
context: ChatAccessContext,
): CustomerChatWorkspace | null {
Iif (!isActiveContext(context)) {
workspace.value?.controller.disconnectRealtime();
workspace.value = null;
return null;
}
const current = workspace.value;
Iif (
current?.ownerId === context.ownerId
&& current.accessToken === context.accessToken
) {
return current;
}
current?.controller.disconnectRealtime();
workspace.value = createWorkspace(context.ownerId, context.accessToken);
return workspace.value;
}
function requireWorkspace(
context: ChatAccessContext,
): CustomerChatWorkspace {
const current = synchronizeAccess(context);
Iif (!current) {
throw new ChatAccessChangedError();
}
return current;
}
function requireCurrent(current: CustomerChatWorkspace) {
if (workspace.value !== current) {
throw new ChatAccessChangedError();
}
}
async function run<T>(
context: ChatAccessContext,
action: (controller: ChatWorkspaceController) => Promise<T>,
): Promise<T> {
const current = requireWorkspace(context);
const result = await action(current.controller);
requireCurrent(current);
return result;
}
const state = computed(() => workspace.value?.state ?? null);
const ownerId = computed(() => workspace.value?.ownerId ?? null);
const conversations = computed(() => state.value?.conversations ?? []);
const activeConversationId = computed(() =>
state.value?.activeConversationId ?? null);
const messages = computed(() => state.value?.messages ?? []);
const hasMore = computed(() => state.value?.hasMore ?? false);
const loadingConversations = computed(() =>
state.value?.loadingConversations ?? false);
const loadingMessages = computed(() => state.value?.loadingMessages ?? false);
const loadingOlder = computed(() => state.value?.loadingOlder ?? false);
const sending = computed(() => state.value?.sending ?? false);
const closingConversationId = computed(() =>
state.value?.closingConversationId ?? null);
const creatingConversation = computed(() =>
state.value?.creatingConversation ?? false);
const error = computed(() => state.value?.error ?? null);
const sendError = computed(() => state.value?.sendError ?? null);
const sendUnknown = computed(() => state.value?.sendUnknown ?? false);
const readError = computed(() => state.value?.readError ?? null);
const conversationCreationError = computed(() =>
state.value?.conversationCreationError ?? null);
const conversationCreationUnknown = computed(() =>
state.value?.conversationCreationUnknown ?? false);
const realtimeStatus = computed(() => state.value?.realtimeStatus ?? "idle");
const realtimeMessage = computed(() =>
state.value?.realtimeMessage ?? "实时连接尚未启动。");
const pendingSend = computed<PendingChatSend | null>(() => {
const pending = state.value?.pendingSend ?? null;
return pending?.userId === ownerId.value ? pending : null;
});
const pendingConversation = computed<PendingChatConversation | null>(() => {
const pending = state.value?.pendingConversation ?? null;
return pending?.userId === ownerId.value ? pending : null;
});
const hasForeignPendingSend = computed(() => Boolean(
state.value?.pendingSend
&& state.value.pendingSend.userId !== ownerId.value,
));
const hasForeignPendingConversation = computed(() => Boolean(
state.value?.pendingConversation
&& state.value.pendingConversation.userId !== ownerId.value,
));
const activeConversation = computed(() =>
workspace.value?.controller.activeConversation() ?? null);
function setActiveConversation(
context: ChatAccessContext,
conversationId: BusinessId | null,
) {
requireWorkspace(context).controller.setActiveConversation(conversationId);
}
function loadConversations(context: ChatAccessContext) {
return run(context, (controller) => controller.loadConversations());
}
function loadActiveConversation(context: ChatAccessContext) {
return run(context, (controller) => controller.loadActiveConversation());
}
function loadMessages(
context: ChatAccessContext,
conversationId?: BusinessId,
) {
return run(context, (controller) => controller.loadMessages(conversationId));
}
function loadOlder(context: ChatAccessContext) {
return run(context, (controller) => controller.loadOlder());
}
function refreshActive(context: ChatAccessContext) {
return run(context, (controller) => controller.refreshActive());
}
function createConversation(context: ChatAccessContext, subject: string) {
return run(context, (controller) => controller.createConversation(subject));
}
function retryPendingConversation(context: ChatAccessContext) {
return run(context, (controller) => controller.retryPendingConversation());
}
function closeConversation(context: ChatAccessContext) {
return run(context, (controller) => controller.closeConversation());
}
function sendText(context: ChatAccessContext, content: string) {
return run(context, (controller) => controller.sendText(content));
}
function retryPendingSend(context: ChatAccessContext) {
return run(context, (controller) => controller.retryPendingSend());
}
function markLatestRead(context: ChatAccessContext) {
return run(context, (controller) => controller.markLatestRead());
}
function connectRealtime(context: ChatAccessContext) {
requireWorkspace(context).controller.connectRealtime();
}
function disconnectRealtime() {
workspace.value?.controller.disconnectRealtime();
}
function restartRealtime(context: ChatAccessContext) {
requireWorkspace(context).controller.restartRealtime();
}
return {
ownerId,
conversations,
activeConversationId,
activeConversation,
messages,
hasMore,
loadingConversations,
loadingMessages,
loadingOlder,
sending,
closingConversationId,
creatingConversation,
error,
sendError,
sendUnknown,
readError,
conversationCreationError,
conversationCreationUnknown,
realtimeStatus,
realtimeMessage,
pendingSend,
pendingConversation,
hasForeignPendingSend,
hasForeignPendingConversation,
synchronizeAccess,
setActiveConversation,
loadConversations,
loadActiveConversation,
loadMessages,
loadOlder,
refreshActive,
createConversation,
retryPendingConversation,
closeConversation,
sendText,
retryPendingSend,
markLatestRead,
connectRealtime,
disconnectRealtime,
restartRealtime,
};
});
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