appview/state: refactor manifest.json

incorporates changes suggested by @boltless.me

Co-authored-by: Seongmin Lee <[e-mail]>
Signed-off-by: oppiliappan <[e-mail]>

appview/state/manifest.go

···
+package state
+
+import (
+	"encoding/json"
+	"net/http"
+)
+
+// https://developer.mozilla.org/en-US/docs/Web/Progressive_web_apps/Manifest
+// https://www.w3.org/TR/appmanifest/
+var manifestData = map[string]any{
+	"name":        "tangled",
+	"description": "tightly-knit social coding.",
+	"icons": []map[string]string{
+		{
+			"src":   "/static/logos/dolly.svg",
+			"sizes": "144x144",
+		},
+	},
+	"start_url":        "/",
+	"id":               "https://tangled.org",
+	"display":          "standalone",
+	"background_color": "#111827",
+	"theme_color":      "#111827",
+}
+
+func (p *State) WebAppManifest(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Content-Type", "application/manifest+json")
+	json.NewEncoder(w).Encode(manifestData)
+}

appview/state/router.go

···
 		s.pages,
 	)
 
-	router.Get("/pwa-manifest.json", s.PWAManifest)
+	router.Get("/pwa-manifest.json", s.WebAppManifest)
 	router.Get("/robots.txt", s.RobotsTxt)
 
 	userRouter := s.UserRouter(&middleware)

appview/state/state.go

···
 	w.Write([]byte(robotsTxt))
 }
 
-// https://developer.mozilla.org/en-US/docs/Web/Progressive_web_apps/Manifest
-const manifestJson = `{
-  "name": "tangled",
-  "description": "tightly-knit social coding.",
-  "icons": [
-    {
-      "src": "/favicon.svg",
-      "sizes": "144x144"
-    }
-  ],
-  "start_url": "/",
-  "id": "org.tangled",
-
-  "display": "standalone",
-  "background_color": "#111827",
-  "theme_color": "#111827"
-}`
-
-func (p *State) PWAManifest(w http.ResponseWriter, r *http.Request) {
-	w.Header().Set("Content-Type", "application/json")
-	w.Write([]byte(manifestJson))
-}
-
 func (s *State) TermsOfService(w http.ResponseWriter, r *http.Request) {
 	user := s.oauth.GetUser(r)
 	s.pages.TermsOfService(w, pages.TermsOfServiceParams{