feature (manifest): generate application manifest server side

the app manifest used to be statically generated meaning it would show
Filestash whenever user tries to install as an app. Now admin can
change that to show something else

client/index.html

@@ -6,7 +6,7 @@
     <meta name="author" content="Mickael Kerjean <mickael@kerjean.me>">
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
     <meta content="width=device-width, initial-scale=1" name="viewport">
-    <link rel="manifest" href="/assets/manifest.json">
+    <link rel="manifest" href="/manifest.json">
     <link rel="apple-touch-icon" href="/assets/logo/apple-touch-icon.png">
     <link rel="stylesheet" href="/custom.css">
     <link rel="preload" href="/api/config" as="script">

client/manifest.json

@@ -1,21 +0,0 @@
-{
-    "name": "Filestash",
-    "short_name": "Filestash",
-    "icons": [
-        {
-            "src": "/assets/logo/android-chrome-192x192.png",
-            "type": "image/png",
-            "sizes": "192x192"
-        },
-        {
-            "src": "/assets/logo/android-chrome-512x512.png",
-            "type": "image/png",
-            "sizes": "512x512"
-        }
-    ],
-    "theme_color": "#f2f3f5",
-    "background_color": "#f2f3f5",
-    "orientation": "any",
-    "display": "standalone",
-    "start_url": "/"
-}

server/ctrl/static.go

@@ -121,6 +121,35 @@ func AboutHandler(ctx App, res http.ResponseWriter, req *http.Request) {
 	}})
 }
 
+func ManifestHandler(ctx App, res http.ResponseWriter, req *http.Request) {
+	res.WriteHeader(http.StatusFound)
+	res.Write([]byte(fmt.Sprintf(`{
+    "name": "%s",
+    "short_name": "%s",
+    "icons": [
+        {
+            "src": "/assets/logo/android-chrome-192x192.png",
+            "type": "image/png",
+            "sizes": "192x192"
+        },
+        {
+            "src": "/assets/logo/android-chrome-512x512.png",
+             "type": "image/png",
+             "sizes": "512x512"
+        }
+    ],
+    "theme_color": "#f2f3f5",
+    "background_color": "#f2f3f5",
+    "orientation": "any",
+    "display": "standalone",
+    "start_url": "/"
+}`, Config.Get("general.name"), Config.Get("general.name"))))
+}
+
+func RobotsHandler(ctx App, res http.ResponseWriter, req *http.Request) {
+	res.Write([]byte(""))
+}
+
 func InitPluginList(code []byte) {
 	listOfPackages := regexp.MustCompile(`github.com/mickael-kerjean/([^\"]+)`).FindAllString(string(code), -1)
 	for _, packageName := range listOfPackages {

server/main.go

@@ -104,9 +104,8 @@ func Init(a *App) {
 	r.HandleFunc("/report", NewMiddlewareChain(ReportHandler, middlewares, *a)).Methods("POST")
 	middlewares = []Middleware{IndexHeaders}
 	r.HandleFunc("/about", NewMiddlewareChain(AboutHandler, middlewares, *a)).Methods("GET")
-	r.HandleFunc("/robots.txt", func(res http.ResponseWriter, req *http.Request) {
-		res.Write([]byte(""))
-	})
+	r.HandleFunc("/robots.txt", NewMiddlewareChain(RobotsHandler, []Middleware{}, *a))
+	r.HandleFunc("/manifest.json", NewMiddlewareChain(ManifestHandler, []Middleware{}, *a)).Methods("GET")
 	r.HandleFunc("/.well-known/security.txt", NewMiddlewareChain(WellKnownSecurityHandler, []Middleware{}, *a)).Methods("GET")
 	r.HandleFunc("/healthz", NewMiddlewareChain(HealthHandler, []Middleware{}, *a)).Methods("GET")
 	r.HandleFunc("/custom.css", NewMiddlewareChain(CustomCssHandler, []Middleware{}, *a)).Methods("GET")

webpack.config.js

@@ -67,7 +67,6 @@ const config = {
         }),
         new CopyWebpackPlugin([
             { from: "locales/*.json", to: "assets/" },
-            { from: "manifest.json", to: "assets/" },
             { from: "worker/*.js", to: "assets/" },
             { from: "assets/logo/*" },
             { from: "assets/icons/*" },