Add guild notifications (#13)

* Create server notification helper

* Create guildCreate event

* Create guild delete event

Author: vexuas

src/events/guildCreate/index.ts

@@ -0,0 +1,26 @@
+import { Guild, WebhookClient } from 'discord.js';
+import { isEmpty } from 'lodash';
+import { GUILD_NOTIFICATION_WEBHOOK_URL, USE_DATABASE } from '../../config/environment';
+import { insertNewGuild } from '../../services/database';
+import { serverNotificationEmbed } from '../../utils/helpers';
+import { EventModule } from '../events';
+
+export default function ({ app }: EventModule) {
+  app.on('guildCreate', async (guild: Guild) => {
+    try {
+      USE_DATABASE && (await insertNewGuild(guild));
+      if (GUILD_NOTIFICATION_WEBHOOK_URL && !isEmpty(GUILD_NOTIFICATION_WEBHOOK_URL)) {
+        const embed = await serverNotificationEmbed({ app, guild, type: 'join' });
+        const notificationWebhook = new WebhookClient({ url: GUILD_NOTIFICATION_WEBHOOK_URL });
+        await notificationWebhook.send({
+          embeds: [embed],
+          username: 'My App Server Notification',
+          avatarURL: '',
+        });
+      }
+    } catch (error) {
+      //TODO: Add error handling
+      console.log(error);
+    }
+  });
+}

src/events/guildDelete/index.ts

@@ -0,0 +1,26 @@
+import { Guild, WebhookClient } from 'discord.js';
+import { isEmpty } from 'lodash';
+import { GUILD_NOTIFICATION_WEBHOOK_URL, USE_DATABASE } from '../../config/environment';
+import { deleteGuild } from '../../services/database';
+import { serverNotificationEmbed } from '../../utils/helpers';
+import { EventModule } from '../events';
+
+export default function ({ app }: EventModule) {
+  app.on('guildDelete', async (guild: Guild) => {
+    try {
+      USE_DATABASE && (await deleteGuild(guild));
+      if (GUILD_NOTIFICATION_WEBHOOK_URL && !isEmpty(GUILD_NOTIFICATION_WEBHOOK_URL)) {
+        const embed = await serverNotificationEmbed({ app, guild, type: 'leave' });
+        const notificationWebhook = new WebhookClient({ url: GUILD_NOTIFICATION_WEBHOOK_URL });
+        await notificationWebhook.send({
+          embeds: [embed],
+          username: 'My App Server Notification',
+          avatarURL: '',
+        });
+      }
+    } catch (error) {
+      //TODO: Add error handling
+      console.log(error);
+    }
+  });
+}

src/utils/helpers.ts

@@ -0,0 +1,46 @@
+import { APIEmbed, Client, Guild } from 'discord.js';
+
+export const serverNotificationEmbed = async ({
+  app,
+  guild,
+  type,
+}: {
+  app: Client;
+  guild: Guild;
+  type: 'join' | 'leave';
+}): Promise<APIEmbed> => {
+  const defaultIcon =
+    'https://cdn.discordapp.com/attachments/248430185463021569/614789995596742656/Wallpaper2.png';
+  const guildIcon = guild.icon && guild.iconURL();
+  const guildOwner =
+    type === 'join'
+      ? await guild.members.fetch(guild.ownerId).then((guildMember) => guildMember.user.tag)
+      : '-';
+
+  const embed = {
+    title: type === 'join' ? 'Joined a new server' : 'Left a server',
+    description: `I'm now in **${app.guilds.cache.size}** servers!`,
+    color: type === 'join' ? 55296 : 16711680,
+    thumbnail: {
+      url: guildIcon ? guildIcon.replace(/jpeg|jpg/gi, 'png') : defaultIcon,
+    },
+    fields: [
+      {
+        name: 'Name',
+        value: guild.name,
+        inline: true,
+      },
+      {
+        name: 'Owner',
+        value: guildOwner,
+        inline: true,
+      },
+      {
+        name: 'Members',
+        value: guild.memberCount.toString(),
+        inline: true,
+      },
+    ],
+  };
+  return embed;
+};