From da2fb46c5ad827cfe6f4eae74e7a2daf9960cac4 Mon Sep 17 00:00:00 2001
From: Balte de Wit <contact@balte.nl>
Date: Mon, 4 Dec 2023 13:09:50 +0100
Subject: [PATCH] feat: fetch versions of external components

---
 src/controllers/serverVersions.ts |  7 +++++++
 src/lib/lib.ts                    | 26 ++++++++++++++++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/src/controllers/serverVersions.ts b/src/controllers/serverVersions.ts
index 920bf80..7110b2d 100644
--- a/src/controllers/serverVersions.ts
+++ b/src/controllers/serverVersions.ts
@@ -23,6 +23,13 @@ function compileVersions(component: any, prefix = ''): Versions {
 			Object.keys(compiledVersions).forEach((key) => (versions[key] = compiledVersions[key]))
 		})
 	}
+	if (component._extVersions) {
+		component._extVersions.forEach((child: PromiseSettledResult<any>) => {
+			if (child.status === 'rejected' || child.value.error) return
+			const compiledVersions = compileVersions(child.value, '~' + child.value.name + '.')
+			Object.keys(compiledVersions).forEach((key) => (versions[key] = compiledVersions[key]))
+		})
+	}
 	return versions
 }
 
diff --git a/src/lib/lib.ts b/src/lib/lib.ts
index 1e77b7d..3140adc 100644
--- a/src/lib/lib.ts
+++ b/src/lib/lib.ts
@@ -3,6 +3,7 @@ import fetch from 'node-fetch'
 import { URL, URLSearchParams } from 'url'
 
 const HEALTH_PATH = 'health'
+const EXT_VERSIONS = ['external/sisyfos/health']
 
 export async function getServerHealth(serverHost: string): Promise<any> {
 	if (serverHost !== '') {
@@ -26,6 +27,30 @@ export async function getServerHealth(serverHost: string): Promise<any> {
 	}
 }
 
+export async function getExternalVersions(serverHost: string): Promise<PromiseSettledResult<any>[]> {
+	const result: any[] = []
+	if (serverHost !== '') {
+		const serverLocation = /^https?:\/\//.test(serverHost) ? new URL(serverHost) : new URL(`http://${serverHost}`)
+
+		return Promise.allSettled(
+			EXT_VERSIONS.map(async (extUrl) => {
+				const url = `${serverLocation.href}${extUrl}`
+
+				try {
+					const response = await fetch(url, { method: 'GET' })
+					return await response.json()
+				} catch (error) {
+					return {
+						error: new Error(`Unable to fetch resource ${url}: ${error}`),
+					}
+				}
+			})
+		)
+	}
+
+	return result
+}
+
 /**
  * Accepts a list of server hosts and returns the responses from a query to
  * each server's /health service.
@@ -41,6 +66,7 @@ export async function getServerData(serverHosts: Array<string>): Promise<Array<a
 	return Promise.all(
 		serverHosts.map(async (host) => {
 			const serverHealth = await getServerHealth(host)
+			serverHealth._extVersions = await getExternalVersions(host)
 			serverHealth._host = host
 			return serverHealth
 		})