feat: implement WebAssembly chat functionality with message sending and announcing capabilities, including tests for function registration

examples/wasm/main.go

@@ -0,0 +1,78 @@
+//go:build js && wasm
+// +build js,wasm
+
+package main
+
+import (
+	"encoding/hex"
+	"fmt"
+	"syscall/js"
+
+	"git.quad4.io/Networks/Reticulum-Go/pkg/wasm"
+	"git.quad4.io/RNS-Things/reticulum-go-mf/pkg/mf"
+)
+
+var messenger *mf.Messenger
+
+func main() {
+	// Register the generic WASM bridge functions first
+	wasm.RegisterJSFunctions()
+
+	// Add chat-specific functions to the "reticulum" JS object
+	reticulum := js.Global().Get("reticulum")
+	reticulum.Set("sendMessage", js.FuncOf(SendMessage))
+	reticulum.Set("sendAnnounce", js.FuncOf(SendAnnounce))
+
+	// Keep the Go program running
+	select {}
+}
+
+func SendMessage(this js.Value, args []js.Value) interface{} {
+	if len(args) < 2 {
+		return js.ValueOf(map[string]interface{}{
+			"error": "Destination hash and message required",
+		})
+	}
+
+	destHashHex := args[0].String()
+	message := args[1].String()
+
+	destHash, err := hex.DecodeString(destHashHex)
+	if err != nil {
+		return js.ValueOf(map[string]interface{}{
+			"error": fmt.Sprintf("Invalid destination hash: %v", err),
+		})
+	}
+
+	// Initialize messenger if not already done
+	if messenger == nil {
+		t := wasm.GetTransport()
+		d := wasm.GetDestinationPointer()
+		if t == nil || d == nil {
+			return js.ValueOf(map[string]interface{}{
+				"error": "Reticulum not initialized",
+			})
+		}
+		messenger = mf.NewMessenger(t, d)
+	}
+
+	// Use the high-level Messenger from mf package
+	if err := messenger.SendMessage(destHash, message); err != nil {
+		return js.ValueOf(map[string]interface{}{
+			"error": fmt.Sprintf("Send failed: %v", err),
+		})
+	}
+
+	return js.ValueOf(map[string]interface{}{
+		"success": true,
+	})
+}
+
+func SendAnnounce(this js.Value, args []js.Value) interface{} {
+	var appData []byte
+	if len(args) >= 1 && args[0].String() != "" {
+		appData = []byte(args[0].String())
+	}
+
+	return wasm.SendAnnounce(appData)
+}