daw/js/ask-widget.js

/**
 * Loads "davo-bot 2000" (the floating AI launcher) site-wide.
 *
 * The widget bundle (/ask/widget.js) and its API (/ask/api/ask) are served by
 * the ralph RAG server and proxied SAME-ORIGIN under /ask/ by Apache — in
 * production on davidawindham.com and locally on daw.stu (see the vhost
 * ProxyPass directives). Same-origin means no CORS to worry about.
 *
 * We probe the widget URL first and only inject it if the response is really
 * JavaScript: when ralph is down, the request falls through to WordPress and
 * returns HTML, and injecting that would throw. The probe makes it a silent
 * no-op until the backend is actually serving the widget. The widget sets
 * window.__dawaskLoaded to guard against a double instance.
 */
( function () {
	if ( typeof document === 'undefined' || typeof fetch === 'undefined' ) {
		return;
	}

	var WIDGET_URL = '/ask/widget.js';
	var API_URL = '/ask/api/ask';

	function inject() {
		if ( document.getElementById( 'dawask-script' ) ) {
			return; // already injected
		}
		var s = document.createElement( 'script' );
		s.id = 'dawask-script';
		s.src = WIDGET_URL;
		s.setAttribute( 'data-api-url', API_URL );
		s.setAttribute( 'data-mode', 'launcher' );
		document.body.appendChild( s );
	}

	fetch( WIDGET_URL, { method: 'GET', cache: 'no-store' } )
		.then( function ( r ) {
			var ct = ( r.headers.get( 'content-type' ) || '' ).toLowerCase();
			if ( r.ok && ct.indexOf( 'javascript' ) !== -1 ) {
				inject();
			}
		} )
		.catch( function () {} ); // backend unreachable → no widget, no error
} )();