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
|
import {
Channel,
Embed,
emitEvent,
Guild,
Message,
MessageCreateEvent,
MessageUpdateEvent,
getPermission,
getRights,
CHANNEL_MENTION,
Snowflake,
USER_MENTION,
ROLE_MENTION,
Role,
EVERYONE_MENTION,
HERE_MENTION,
MessageType,
User,
Application,
Webhook,
Attachment,
Config,
MessageCreateSchema,
} from "@fosscord/util";
import { HTTPError } from "@fosscord/util";
import fetch from "node-fetch";
import cheerio from "cheerio";
import { OrmUtils } from "@fosscord/util";
const allow_empty = false;
// TODO: check webhook, application, system author, stickers
// TODO: embed gifs/videos/images
const LINK_REGEX = /https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)/g;
const DEFAULT_FETCH_OPTIONS: any = {
redirect: "follow",
follow: 1,
headers: {
"user-agent": "Mozilla/5.0 (compatible; Fosscord/1.0; +https://github.com/fosscord/fosscord)"
},
// size: 1024 * 1024 * 5, // grabbed from config later
compress: true,
method: "GET"
};
export async function handleMessage(opts: MessageOptions): Promise<Message> {
const channel = await Channel.findOneOrFail({ where: { id: opts.channel_id }, relations: ["recipients"] });
if (!channel || !opts.channel_id) throw new HTTPError("Channel not found", 404);
const message = OrmUtils.mergeDeep(new Message(), {
...opts,
sticker_items: opts.sticker_ids?.map((x) => ({ id: x })),
guild_id: channel.guild_id,
channel_id: opts.channel_id,
attachments: opts.attachments || [],
embeds: opts.embeds || [],
reactions: /*opts.reactions ||*/ [],
type: opts.type ?? 0
});
if (message.content && message.content.length > Config.get().limits.message.maxCharacters) {
throw new HTTPError("Content length over max character limit")
}
if (opts.author_id) {
message.author = await User.getPublicUser(opts.author_id);
const rights = await getRights(opts.author_id);
rights.hasThrow("SEND_MESSAGES");
}
if (opts.application_id) {
message.application = await Application.findOneOrFail({ where: { id: opts.application_id } });
}
if (opts.webhook_id) {
message.webhook = await Webhook.findOneOrFail({ where: { id: opts.webhook_id } });
}
const permission = await getPermission(opts.author_id, channel.guild_id, opts.channel_id);
permission.hasThrow("SEND_MESSAGES");
if (permission.cache.member) {
message.member = permission.cache.member;
}
if (opts.tts) permission.hasThrow("SEND_TTS_MESSAGES");
if (opts.message_reference) {
permission.hasThrow("READ_MESSAGE_HISTORY");
// code below has to be redone when we add custom message routing
if (message.guild_id !== null) {
const guild = await Guild.findOneOrFail({ where: { id: channel.guild_id } });
if (!guild.features.includes("CROSS_CHANNEL_REPLIES")) {
if (opts.message_reference.guild_id !== channel.guild_id) throw new HTTPError("You can only reference messages from this guild");
if (opts.message_reference.channel_id !== opts.channel_id) throw new HTTPError("You can only reference messages from this channel");
}
}
/** Q: should be checked if the referenced message exists? ANSWER: NO
otherwise backfilling won't work **/
// @ts-ignore
message.type = MessageType.REPLY;
}
// TODO: stickers/activity
if (!allow_empty && (!opts.content && !opts.embeds?.length && !opts.attachments?.length && !opts.sticker_ids?.length)) {
throw new HTTPError("Empty messages are not allowed", 50006);
}
let content = opts.content;
let mention_channel_ids = [] as string[];
let mention_role_ids = [] as string[];
let mention_user_ids = [] as string[];
let mention_everyone = false;
if (content) { // TODO: explicit-only mentions
message.content = content.trim();
for (const [_, mention] of content.matchAll(CHANNEL_MENTION)) {
if (!mention_channel_ids.includes(mention)) mention_channel_ids.push(mention);
}
for (const [_, mention] of content.matchAll(USER_MENTION)) {
if (!mention_user_ids.includes(mention)) mention_user_ids.push(mention);
}
await Promise.all(
Array.from(content.matchAll(ROLE_MENTION)).map(async ([_, mention]) => {
const role = await Role.findOneOrFail({ where: { id: mention, guild_id: channel.guild_id } });
if (role.mentionable || permission.has("MANAGE_ROLES")) {
mention_role_ids.push(mention);
}
})
);
if (permission.has("MENTION_EVERYONE")) {
mention_everyone = !!content.match(EVERYONE_MENTION) || !!content.match(HERE_MENTION);
}
}
message.mention_channels = mention_channel_ids.map((x) => OrmUtils.mergeDeep(new Channel(), { id: x }));
message.mention_roles = mention_role_ids.map((x) => OrmUtils.mergeDeep(new Role(), { id: x }));
message.mentions = mention_user_ids.map((x) => OrmUtils.mergeDeep(new User(), { id: x }));
message.mention_everyone = mention_everyone;
// TODO: check and put it all in the body
return message;
}
// TODO: cache link result in db
export async function postHandleMessage(message: Message) {
let links = message.content?.match(LINK_REGEX);
if (!links) return;
const data = { ...message };
data.embeds = data.embeds.filter((x) => x.type !== "link");
links = links.slice(0, 20); // embed max 20 links — TODO: make this configurable with instance policies
for (const link of links) {
try {
const request = await fetch(link, {
...DEFAULT_FETCH_OPTIONS,
size: Config.get().limits.message.maxEmbedDownloadSize,
});
const text = await request.text();
const $ = cheerio.load(text);
const title = $('meta[property="og:title"]').attr("content");
const provider_name = $('meta[property="og:site_name"]').text();
const author_name = $('meta[property="article:author"]').attr("content");
const description = $('meta[property="og:description"]').attr("content") || $('meta[property="description"]').attr("content");
const image = $('meta[property="og:image"]').attr("content");
const url = $('meta[property="og:url"]').attr("content");
// TODO: color
const embed: Embed = {
provider: {
url: link,
name: provider_name
}
};
if (author_name) embed.author = { name: author_name };
if (image) embed.thumbnail = { proxy_url: image, url: image };
if (title) embed.title = title;
if (url) embed.url = url;
if (description) embed.description = description;
if (title || description) {
data.embeds.push(embed);
}
} catch (error) {}
}
await Promise.all([
emitEvent({
event: "MESSAGE_UPDATE",
channel_id: message.channel_id,
data
} as MessageUpdateEvent),
Message.update({ id: message.id, channel_id: message.channel_id }, { embeds: data.embeds })
]);
}
export async function sendMessage(opts: MessageOptions) {
const message = await handleMessage({ ...opts, timestamp: new Date() });
//TODO: check this, removed toJSON call
await Promise.all([
Message.insert(message),
emitEvent({ event: "MESSAGE_CREATE", channel_id: opts.channel_id, data: message } as MessageCreateEvent)
]);
postHandleMessage(message).catch((e) => {}); // no await as it should catch error non-blockingly
return message;
}
interface MessageOptions extends MessageCreateSchema {
id?: string;
type?: MessageType;
pinned?: boolean;
author_id?: string;
webhook_id?: string;
application_id?: string;
embeds?: Embed[];
channel_id?: string;
attachments?: Attachment[];
edited_timestamp?: Date;
timestamp?: Date;
}
|
