Webhook updates (#78)

* extracted webhook config, modernized config
* updated readme to be more beginner friendly

* added config for uuid api url

* more readme updates

Co-authored-by: destruc7i0n <destruc7i0n@users.noreply.github.com>

1 files changed, 112 insertions, 0 deletions

diff --git a/src/DiscordWebhooks.ts b/src/DiscordWebhooks.ts
new file mode 100644
index 0000000..fcdf57f
--- /dev/null
+++ b/src/DiscordWebhooks.ts
@@ -0,0 +1,112 @@
+import { WebhookClient, WebhookMessageOptions } from 'discord.js'
+
+import axios from 'axios'
+
+import type { Config } from './Config'
+
+class DiscordWebhooks {
+  private config: Config
+
+  private webhookClient: WebhookClient
+
+  private uuidCache: Map<string, string>
+
+  public id: string | null
+  private token: string | null
+
+  constructor (config: Config) {
+    this.config = config
+
+    this.id = null
+    this.token = null
+
+    this.uuidCache = new Map()
+  }
+
+  public init () {
+    const { id, token } = this.parseDiscordWebhook(this.config.WEBHOOK_URL)
+
+    if (!id || !token) {
+      process.exit(1)
+    }
+
+    this.id = id
+    this.token = token
+
+    this.webhookClient = new WebhookClient({ id, token })
+  }
+
+  private parseDiscordWebhook (url: string) {
+    const re = /discord[app]?.com\/api\/webhooks\/([^\/]+)\/([^\/]+)/
+
+    // the is of the webhook
+    let id = null
+    let token = null
+
+    if (!re.test(url)) {
+      // In case the url changes at some point, I will warn if it still works
+      console.log('[WARN] The Webhook URL may not be valid!')
+    } else {
+      const match = url.match(re)
+      id = match?.[1]
+      token = match?.[2]
+    }
+
+    return { id, token }
+  }
+
+  private async getUUIDFromUsername (username: string): Promise<string | null> {
+    username = username.toLowerCase()
+    if (this.uuidCache.has(username)) return this.uuidCache.get(username)!
+    // otherwise fetch and store
+    try {
+      const response = await (
+        await axios.get((this.config.UUID_API_URL ?? 'https://api.mojang.com/users/profiles/minecraft/%username%').replace('%username%', username))
+      ).data
+      const uuid = response.id
+      this.uuidCache.set(username, uuid)
+      if (this.config.DEBUG) console.log(`[DEBUG] Fetched UUID ${uuid} for username "${username}"`)
+      return uuid
+    } catch (e) {
+      console.log(`[ERROR] Could not fetch uuid for ${username}, falling back to Steve for the skin`)
+      return null
+    }
+  }
+
+  private getHeadUrl(uuid: string): string {
+    const url = this.config.HEAD_IMAGE_URL || 'https://mc-heads.net/avatar/%uuid%/256'
+    return url.replace(/%uuid%/, uuid)
+  }
+
+  private async makeDiscordWebhook (username: string, message: string) {
+    const defaultHead = this.getHeadUrl(this.config.DEFAULT_PLAYER_HEAD || 'c06f89064c8a49119c29ea1dbd1aab82') // MHF_Steve
+
+    const messsageOptions: WebhookMessageOptions = {
+      username,
+      content: message,
+    }
+
+    if (username === this.config.SERVER_NAME + ' - Server') { // use avatar for the server
+      if (this.config.SERVER_IMAGE) messsageOptions.avatarURL = this.config.SERVER_IMAGE
+    } else { // use avatar for player
+      const uuid = await this.getUUIDFromUsername(username)
+      messsageOptions.avatarURL = !!uuid ? this.getHeadUrl(uuid) : defaultHead
+    }
+
+    return messsageOptions
+  }
+
+  public async sendMessage (username: string, message: string) {
+    const webhookContent = await this.makeDiscordWebhook(username, message)
+    try {
+      await this.webhookClient!.send(webhookContent)
+      return true
+    } catch (e) {
+      console.log('[ERROR] Could not send Discord message through WebHook! Falling back to sending through bot.')
+      if (this.config.DEBUG) console.log(e)
+      return false
+    }
+  }
+}
+
+export default DiscordWebhooks