feat(server): implemented login via ARL

server/src/routes/api/post/index.ts

@@ -1,3 +1,3 @@
-import { ApiHandler } from '../../../types'
+import loginArl from './login-arl'
 
-export default [] as ApiHandler[]
+export default [loginArl]

server/src/routes/api/post/login-arl.ts

@@ -0,0 +1,39 @@
+import { RequestHandler } from 'express'
+import { ApiHandler } from '../../../types'
+import { dz } from '../../../main'
+
+export interface RawLoginArlQuery {
+	arl: string
+	child?: number
+}
+
+const path: ApiHandler['path'] = '/login-arl/'
+
+const handler: RequestHandler<{}, {}, {}, RawLoginArlQuery> = async (req, res, next) => {
+	if (!req.query) {
+		res.status(400).send()
+		return next()
+	}
+
+	if (!req.query.arl) {
+		res.status(400).send()
+		return next()
+	}
+
+	const loginParams: (string | number)[] = [req.query.arl]
+
+	// TODO Handle the child === 0 case, don't want to rely on the login_via_arl default param (it may change in the
+	//  future)
+	if (req.query.child) {
+		loginParams.push(req.query.child)
+	}
+
+	const response = await dz.login_via_arl(...loginParams)
+
+	res.status(200).send(response)
+	next()
+}
+
+const apiHandler = { path, handler }
+
+export default apiHandler