feat: add OAuth2 authentication (Google/GitHub/Discord)

src/services/users/oauth2/github/__utils__/utils.ts

@@ -0,0 +1,57 @@
+import querystring from 'node:querystring'
+
+import axios from 'axios'
+
+import { OAuthStrategy } from '../../../../../tools/utils/OAuthStrategy.js'
+
+export const GITHUB_PROVIDER = 'github'
+export const GITHUB_BASE_URL = 'https://github.com'
+export const GITHUB_API_BASE_URL = 'https://api.github.com'
+export const GITHUB_CLIENT_ID =
+  process.env.GITHUB_CLIENT_ID ?? 'GITHUB_CLIENT_ID'
+export const GITHUB_CLIENT_SECRET =
+  process.env.GITHUB_CLIENT_SECRET ?? 'GITHUB_CLIENT_SECRET'
+export const githubStrategy = new OAuthStrategy(GITHUB_PROVIDER)
+
+export interface GitHubUser {
+  login: string
+  id: number
+  name: string
+  avatar_url: string
+}
+
+export interface GitHubTokens {
+  access_token: string
+  scope: string
+  token_type: string
+}
+
+export const getGitHubUserData = async (
+  code: string,
+  redirectURI: string
+): Promise<GitHubUser> => {
+  const { data: token } = await axios.post<GitHubTokens>(
+    `${GITHUB_BASE_URL}/login/oauth/access_token`,
+    querystring.stringify({
+      client_id: GITHUB_CLIENT_ID,
+      client_secret: GITHUB_CLIENT_SECRET,
+      code,
+      redirect_uri: redirectURI
+    }),
+    {
+      headers: {
+        'Content-Type': 'application/x-www-form-urlencoded',
+        Accept: 'application/json'
+      }
+    }
+  )
+  const { data: githubUser } = await axios.get<GitHubUser>(
+    `${GITHUB_API_BASE_URL}/user`,
+    {
+      headers: {
+        Authorization: `token ${token.access_token}`
+      }
+    }
+  )
+  return githubUser
+}