Module MountainWebviewPostMessageFromGuest 

MountainWebviewPostMessageFromGuest (Track)

RESPONSIBILITIES

This module provides a Tauri command handler for a Webview guest to post a message back to the extension host.

Core Functions:

• Get IPC provider from runtime
• Forward message to main Cocoon sidecar
• Handle IPC errors gracefully

ARCHITECTURAL ROLE

MountainWebviewPostMessageFromGuest acts as the webview message forwarder in Track’s dispatch layer:

Webview (Guest) ──► MountainWebviewPostMessageFromGuest ──► IPC Provider ──► Cocoon (Sidecar)

KEY COMPONENTS

• Fn: Main webview message forwarding function (public async fn Fn)

ERROR HANDLING

• IPC communication errors are logged and propagated to caller
• Provider requirement failures are propagated

LOGGING

• Message forwarding failures are logged at error level
• Log format: “[Track/Webview] Forwarding webview message to Cocoon”

PERFORMANCE CONSIDERATIONS

• Direct IPC provider access without intermediate overhead
• Async IPC operations to avoid blocking

TODO

• Add message validation before forwarding
• Implement message rate limiting
• Add message metrics and telemetry

Functions

MountainWebviewPostMessageFromGuest

A specific Tauri command handler for a Webview guest to post a message back to the extension host.