fix orphans

internal/backend/db.go

@@ -102,7 +102,7 @@ func (b *DBBackend) initSchema(ctx context.Context) error {
 		)`,
 		`CREATE TABLE IF NOT EXISTS calendar_objects (
 		    id SERIAL PRIMARY KEY,
-		    calendar_id INTEGER REFERENCES calendars(id) ON DELETE CASCADE,
+		    calendar_id INTEGER NOT NULL REFERENCES calendars(id) ON DELETE CASCADE,
 		    path TEXT NOT NULL,
 		    data TEXT NOT NULL,
 		    etag TEXT NOT NULL,
@@ -110,20 +110,20 @@ func (b *DBBackend) initSchema(ctx context.Context) error {
 		)`,
 		`CREATE TABLE IF NOT EXISTS addressbooks (
 		    id SERIAL PRIMARY KEY,
-		    owner_id INTEGER REFERENCES users(id) ON DELETE CASCADE,
+		    owner_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
 		    path TEXT UNIQUE NOT NULL,
 		    name TEXT,
 		    description TEXT
 		)`,
 		`CREATE TABLE IF NOT EXISTS addressbook_access (
-		    addressbook_id INTEGER REFERENCES addressbooks(id) ON DELETE CASCADE,
-		    user_id INTEGER REFERENCES users(id) ON DELETE CASCADE,
+		    addressbook_id INTEGER NOT NULL REFERENCES addressbooks(id) ON DELETE CASCADE,
+		    user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
 		    mode TEXT NOT NULL,
 		    PRIMARY KEY (addressbook_id, user_id)
 		)`,
 		`CREATE TABLE IF NOT EXISTS addressbook_objects (
 		    id SERIAL PRIMARY KEY,
-		    addressbook_id INTEGER REFERENCES addressbooks(id) ON DELETE CASCADE,
+		    addressbook_id INTEGER NOT NULL REFERENCES addressbooks(id) ON DELETE CASCADE,
 		    path TEXT NOT NULL,
 		    data TEXT NOT NULL,
 		    etag TEXT NOT NULL,

internal/extra/injector.go

@@ -39,9 +39,19 @@ func InjectColor(r *http.Request, ctx context.Context, handler http.Handler, w h
 	body := buf.Bytes()
 	
 	// this models after the Radicale Response, largely AI code
-	// 1. Add namespaces to the root multistatus tag
-	reMultistatus := regexp.MustCompile(`(<[a-zA-Z0-9]*:?multistatus)`)
-	body = reMultistatus.ReplaceAll(body, []byte(`$1 xmlns:ICAL="http://apple.com/ns/ical/" xmlns:C="urn:ietf:params:xml:ns:caldav" xmlns:CS="http://calendarserver.org/ns/"`))
+	// 1. Add namespaces to the root multistatus tag only if they are missing
+	if !bytes.Contains(body, []byte("xmlns:ICAL=")) {
+		reMultistatus := regexp.MustCompile(`(<[a-zA-Z0-9]*:?multistatus)`)
+		body = reMultistatus.ReplaceAll(body, []byte(`$1 xmlns:ICAL="http://apple.com/ns/ical/"`))
+	}
+	if !bytes.Contains(body, []byte("xmlns:C=")) && !bytes.Contains(body, []byte("xmlns:c=")) {
+		reMultistatus := regexp.MustCompile(`(<[a-zA-Z0-9]*:?multistatus)`)
+		body = reMultistatus.ReplaceAll(body, []byte(`$1 xmlns:C="urn:ietf:params:xml:ns:caldav"`))
+	}
+	if !bytes.Contains(body, []byte("xmlns:CS=")) {
+		reMultistatus := regexp.MustCompile(`(<[a-zA-Z0-9]*:?multistatus)`)
+		body = reMultistatus.ReplaceAll(body, []byte(`$1 xmlns:CS="http://calendarserver.org/ns/"`))
+	}
 
 	// 2. Response processing
 	reResponse :=  regexp.MustCompile(`(?s)<[a-zA-Z0-9]*:?response.*?>.*?</[a-zA-Z0-9]*:?response>`)
@@ -62,7 +72,7 @@ func InjectColor(r *http.Request, ctx context.Context, handler http.Handler, w h
 			return resp
 		}
 
-		// 1. Strip any existing conflicting tags that might be in 404 blocks
+		// 1. Strip any existing conflicting tags that might be in 404 blocks (non-greedy)
 		reStrip := regexp.MustCompile(`(?s)<[a-zA-Z0-9]*:?(calendar-color|getctag|calendar-order).*?/>|<[a-zA-Z0-9]*:?(calendar-color|getctag|calendar-order).*?>.*?</[a-zA-Z0-9]*:?(calendar-color|getctag|calendar-order)>`)
 		resp = reStrip.ReplaceAll(resp, []byte(""))