Add more Element iOS compatibility (ref #8)

web/widget-api.js

@@ -34,14 +34,28 @@ window.onmessage = event => {
 }
 
 export function sendSticker(content) {
+	const data = {
+		content,
+		// `name` is for Element Web (and also the spec)
+		// Element Android uses content -> body as the name
+		name: content.body,
+	}
+
+	// This is for Element iOS
+	const widgetData = {
+		...data,
+		description: content.body,
+		file: `${content["net.maunium.telegram.sticker"].id}.png`,
+	}
+	// Element iOS explodes if there are extra fields present
+	delete widgetData.content["net.maunium.telegram.sticker"]
+
 	window.parent.postMessage({
 		api: "fromWidget",
 		action: "m.sticker",
 		requestId: `sticker-${Date.now()}`,
 		widgetId,
-		data: {
-			name: content.body,
-			content,
-		},
+		data,
+		widgetData,
 	}, "*")
 }