Spaces:
Running
Running
File size: 3,968 Bytes
2a8cee5 | 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 | // coversations is stored in localStorage
// format: { [convId]: { id: string, lastModified: number, messages: [...] } }
import { CONFIG_DEFAULT } from '../Config';
import { Conversation, Message } from './types';
const event = new EventTarget();
type CallbackConversationChanged = (convId: string) => void;
let onConversationChangedHandlers: [
CallbackConversationChanged,
EventListener,
][] = [];
const dispatchConversationChange = (convId: string) => {
event.dispatchEvent(
new CustomEvent('conversationChange', { detail: { convId } })
);
};
// convId is a string prefixed with 'conv-'
const StorageUtils = {
/**
* manage conversations
*/
getAllConversations(): Conversation[] {
const res = [];
for (const key in localStorage) {
if (key.startsWith('conv-')) {
res.push(JSON.parse(localStorage.getItem(key) ?? '{}'));
}
}
res.sort((a, b) => b.lastModified - a.lastModified);
return res;
},
/**
* can return null if convId does not exist
*/
getOneConversation(convId: string): Conversation | null {
return JSON.parse(localStorage.getItem(convId) || 'null');
},
/**
* if convId does not exist, create one
*/
appendMsg(convId: string, msg: Message): void {
if (msg.content === null) return;
const conv = StorageUtils.getOneConversation(convId) || {
id: convId,
lastModified: Date.now(),
messages: [],
};
conv.messages.push(msg);
conv.lastModified = Date.now();
localStorage.setItem(convId, JSON.stringify(conv));
dispatchConversationChange(convId);
},
/**
* Get new conversation id
*/
getNewConvId(): string {
return `conv-${Date.now()}`;
},
/**
* remove conversation by id
*/
remove(convId: string): void {
localStorage.removeItem(convId);
dispatchConversationChange(convId);
},
/**
* remove all conversations
*/
filterAndKeepMsgs(
convId: string,
predicate: (msg: Message) => boolean
): void {
const conv = StorageUtils.getOneConversation(convId);
if (!conv) return;
conv.messages = conv.messages.filter(predicate);
conv.lastModified = Date.now();
localStorage.setItem(convId, JSON.stringify(conv));
dispatchConversationChange(convId);
},
/**
* remove last message from conversation
*/
popMsg(convId: string): Message | undefined {
const conv = StorageUtils.getOneConversation(convId);
if (!conv) return;
const msg = conv.messages.pop();
conv.lastModified = Date.now();
if (conv.messages.length === 0) {
StorageUtils.remove(convId);
} else {
localStorage.setItem(convId, JSON.stringify(conv));
}
dispatchConversationChange(convId);
return msg;
},
// event listeners
onConversationChanged(callback: CallbackConversationChanged) {
const fn = (e: Event) => callback((e as CustomEvent).detail.convId);
onConversationChangedHandlers.push([callback, fn]);
event.addEventListener('conversationChange', fn);
},
offConversationChanged(callback: CallbackConversationChanged) {
const fn = onConversationChangedHandlers.find(([cb, _]) => cb === callback);
if (fn) {
event.removeEventListener('conversationChange', fn[1]);
}
onConversationChangedHandlers = [];
},
// manage config
getConfig(): typeof CONFIG_DEFAULT {
const savedVal = JSON.parse(localStorage.getItem('config') || '{}');
// to prevent breaking changes in the future, we always provide default value for missing keys
return {
...CONFIG_DEFAULT,
...savedVal,
};
},
setConfig(config: typeof CONFIG_DEFAULT) {
localStorage.setItem('config', JSON.stringify(config));
},
getTheme(): string {
return localStorage.getItem('theme') || 'auto';
},
setTheme(theme: string) {
if (theme === 'auto') {
localStorage.removeItem('theme');
} else {
localStorage.setItem('theme', theme);
}
},
};
export default StorageUtils;
|