Dynamize manifest.json with configurable options

internal/glance/config.go

@@ -55,6 +55,9 @@ type config struct {
 		LogoText     string        `yaml:"logo-text"`
 		LogoURL      string        `yaml:"logo-url"`
 		FaviconURL   string        `yaml:"favicon-url"`
+		AppName      string        `yaml:"app-name"`
+		AppIconURL   string        `yaml:"app-icon-url"`
+		AppBgColor   string        `yaml:"app-bg-color"`
 	} `yaml:"branding"`
 
 	Pages []page `yaml:"pages"`

internal/glance/glance.go

@@ -96,6 +96,18 @@ func newApplication(config *config) (*application, error) {
 		config.Branding.FaviconURL = app.transformUserDefinedAssetPath(config.Branding.FaviconURL)
 	}
 
+	if config.Branding.AppName == "" {
+		config.Branding.AppName = "Glance"
+	}
+
+	if config.Branding.AppIconURL == "" {
+		config.Branding.AppIconURL = app.AssetPath("app-icon.png")
+	}
+
+	if config.Branding.AppBgColor == "" {
+		config.Branding.AppBgColor = "#151519"
+	}
+
 	config.Branding.LogoURL = app.transformUserDefinedAssetPath(config.Branding.LogoURL)
 
 	return app, nil
@@ -257,6 +269,26 @@ func (a *application) server() (func() error, func() error) {
 		w.Write(bundledCSSContents)
 	})
 
+	mux.HandleFunc(fmt.Sprintf("GET /static/%s/manifest.json", staticFSHash), func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Add("Cache-Control", cssBundleCacheControlValue)
+		w.Header().Add("Content-Type", "application/json")
+
+		template, err := template.New("manifest.json").
+			Funcs(globalTemplateFunctions).
+			ParseFS(templateFS, "manifest.json")
+		if err != nil {
+			w.WriteHeader(http.StatusInternalServerError)
+			w.Write([]byte(fmt.Sprintf("Error parsing manifest.json template: %v", err)))
+			return
+		}
+
+		if err := template.Execute(w, pageTemplateData{App: a}); err != nil {
+			w.WriteHeader(http.StatusInternalServerError)
+			w.Write([]byte(fmt.Sprintf("Error executing manifest.json template: %v", err)))
+			return
+		}
+	})
+
 	var absAssetsPath string
 	if a.Config.Server.AssetsPath != "" {
 		absAssetsPath, _ = filepath.Abs(a.Config.Server.AssetsPath)

internal/glance/static/manifest.json

@@ -1,14 +0,0 @@
-{
-    "name": "Glance",
-    "display": "standalone",
-    "background_color": "#151519",
-    "scope": "/",
-    "start_url": "/",
-    "icons": [
-        {
-            "src": "app-icon.png",
-            "type": "image/png",
-            "sizes": "512x512"
-        }
-    ]
-}

internal/glance/templates/manifest.json

@@ -0,0 +1,14 @@
+{
+    "name": "{{ .App.Config.Branding.AppName }}",
+    "display": "standalone",
+    "background_color": "{{ .App.Config.Branding.AppBgColor }}",
+    "scope": "/",
+    "start_url": "/",
+    "icons": [
+        {
+            "src": "{{ .App.Config.Branding.AppIconURL }}",
+            "type": "image/png",
+            "sizes": "512x512"
+        }
+    ]
+}