From 315c80eb4004fa13e496e70316827a3bd84f96bd Mon Sep 17 00:00:00 2001
From: Julien Oculi <xdrz.jot.sr@gmail.com>
Date: Mon, 5 Feb 2024 17:35:19 +0100
Subject: [PATCH] ci: cache remote url in css files

---
 plugins/css_bundler/src/builder.ts    | 18 +++++++++++++++++-
 plugins/css_bundler/src/middleware.ts | 21 ++++++++++++++++++++-
 2 files changed, 37 insertions(+), 2 deletions(-)

diff --git a/plugins/css_bundler/src/builder.ts b/plugins/css_bundler/src/builder.ts
index b7150d2..7a9c902 100644
--- a/plugins/css_bundler/src/builder.ts
+++ b/plugins/css_bundler/src/builder.ts
@@ -1,6 +1,6 @@
 import { join, parse, resolve, toFileUrl } from '$std/path/mod.ts'
 import { bundleAsync } from 'lightningcss'
-import { cssImports, Logger, uInt8ArrayConcat } from './helpers.ts'
+import { Logger, cssImports, uInt8ArrayConcat } from './helpers.ts'
 
 export async function builder(
 	{ filename, dev, assetDir, remote }: {
@@ -85,7 +85,23 @@ export async function builder(
 				return url.toString()
 			},
 		},
+		visitor: {
+			Url({ loc, url }) {
+				if (remote && !url.startsWith('data:')) {
+					cache(url, remote, assetDir)
+				}
+				return { loc, url }
+			}
+		}
 	})
 
 	return { code, map }
 }
+
+async function cache(url: string, base: string, assetDir: string) {
+	const fullUrl = new URL(url, base)
+	const response = await fetch(fullUrl)
+	const file = await response.arrayBuffer()
+	const filepath = join(assetDir, url.split('?')[0])
+	await Deno.writeFile(filepath, new Uint8Array(file))
+}
\ No newline at end of file
diff --git a/plugins/css_bundler/src/middleware.ts b/plugins/css_bundler/src/middleware.ts
index f1d34c5..cb23944 100644
--- a/plugins/css_bundler/src/middleware.ts
+++ b/plugins/css_bundler/src/middleware.ts
@@ -1,6 +1,7 @@
 import { MiddlewareHandler } from '$fresh/server.ts'
+import { contentType } from '$fresh/src/server/deps.ts'
 import { ensureDir } from '$std/fs/ensure_dir.ts'
-import { join } from '$std/path/mod.ts'
+import { join, parse } from '$std/path/mod.ts'
 import { bundleCss } from './bundler.ts'
 
 export function cssHandler(sourceDir: string): MiddlewareHandler {
@@ -32,7 +33,25 @@ export function cssHandler(sourceDir: string): MiddlewareHandler {
 				})
 			}
 		}
+
 		const resp = await ctx.next()
+
+		if (resp.status === 404) {
+			try {
+				const file = await Deno.readFile(join(assetDir, ctx.url.pathname))
+				const { ext } = parse(ctx.url.pathname)
+
+				return new Response(file, {
+					headers: {
+						'Content-Type': contentType(ext) ?? 'text/plain; charset=utf-8'
+					}
+				})
+			} catch {
+				return resp
+			}
+		}
+
+		//anyway
 		return resp
 	}
 }