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import { DataProxy } from 'apollo-cache';
import { defaultDataIdFromObject } from 'apollo-cache-inmemory';
import * as fragments from '../graphql/fragments';
import * as queries from '../graphql/queries';
import {
MessageFragment,
useMessageAddedSubscription,
ChatsQuery,
ChatFragment,
useChatAddedSubscription,
useChatRemovedSubscription,
} from '../graphql/types';
type Client = Pick<
DataProxy,
'readFragment' | 'writeFragment' | 'readQuery' | 'writeQuery'
>;
export const useCacheService = () => {
useMessageAddedSubscription({
onSubscriptionData: ({ client, subscriptionData: { data } }) => {
if (data) {
writeMessage(client, data.messageAdded);
}
},
});
useChatAddedSubscription({
onSubscriptionData: ({ client, subscriptionData: { data } }) => {
if (data) {
writeChat(client, data.chatAdded);
}
},
});
useChatRemovedSubscription({
onSubscriptionData: ({ client, subscriptionData: { data } }) => {
if (data) {
eraseChat(client, data.chatRemoved);
}
},
});
};
export const writeMessage = (client: Client, message: MessageFragment) => {
type FullChat = { [key: string]: any };
let fullChat;
const chatIdFromStore = defaultDataIdFromObject(message.chat);
if (chatIdFromStore === null) {
return;
}
try {
fullChat = client.readFragment<FullChat>({
id: chatIdFromStore,
fragment: fragments.fullChat,
fragmentName: 'FullChat',
});
} catch (e) {
return;
}
if (fullChat === null || fullChat.messages === null) {
return;
}
if (fullChat.messages.messages.some((m: any) => m.id === message.id)) return;
fullChat.messages.messages.push(message);
fullChat.lastMessage = message;
client.writeFragment({
id: chatIdFromStore,
fragment: fragments.fullChat,
fragmentName: 'FullChat',
data: fullChat,
});
let data;
try {
data = client.readQuery<ChatsQuery>({
query: queries.chats,
});
} catch (e) {
return;
}
if (!data || data === null) {
return null;
}
if (!data.chats || data.chats === undefined) {
return null;
}
const chats = data.chats;
const chatIndex = chats.findIndex((c: any) => {
if (message === null || message.chat === null) return -1;
return c.id === message?.chat?.id;
});
if (chatIndex === -1) return;
const chatWhereAdded = chats[chatIndex];
// The chat will appear at the top of the ChatsList component
chats.splice(chatIndex, 1);
chats.unshift(chatWhereAdded);
client.writeQuery({
query: queries.chats,
data: { chats: chats },
});
};
export const writeChat = (client: Client, chat: ChatFragment) => {
const chatId = defaultDataIdFromObject(chat);
if (chatId === null) {
return;
}
client.writeFragment({
id: chatId,
fragment: fragments.chat,
fragmentName: 'Chat',
data: chat,
});
let data;
try {
data = client.readQuery<ChatsQuery>({
query: queries.chats,
});
} catch (e) {
return;
}
if (!data) return;
const chats = data.chats;
if (!chats) return;
if (chats.some((c: any) => c.id === chat.id)) return;
chats.unshift(chat);
client.writeQuery({
query: queries.chats,
data: { chats },
});
};
export const eraseChat = (client: Client, chatId: string) => {
const chatType = {
__typename: 'Chat',
id: chatId,
};
const chatIdFromObject = defaultDataIdFromObject(chatType);
if (chatIdFromObject === null) {
return;
}
client.writeFragment({
id: chatIdFromObject,
fragment: fragments.fullChat,
fragmentName: 'FullChat',
data: null,
});
let data: ChatsQuery | null;
try {
data = client.readQuery<ChatsQuery>({
query: queries.chats,
});
} catch (e) {
return;
}
if (!data || !data.chats) return;
const chats = data.chats;
if (!chats) return;
const chatIndex = chats.findIndex((c: any) => c.id === chatId);
if (chatIndex === -1) return;
// The chat will appear at the top of the ChatsList component
chats.splice(chatIndex, 1);
client.writeQuery({
query: queries.chats,
data: { chats: chats },
});
};
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