ssr systems

beszel/internal/hub/hub.go

@@ -19,6 +19,7 @@ import (
 	"time"
 
 	"github.com/google/uuid"
+	"github.com/pocketbase/dbx"
 	"github.com/pocketbase/pocketbase"
 	"github.com/pocketbase/pocketbase/apis"
 	"github.com/pocketbase/pocketbase/core"
@@ -112,6 +113,8 @@ func (h *Hub) initialize(e *core.ServeEvent) error {
 	// set URL if BASE_URL env is set
 	if h.appURL != "" {
 		settings.Meta.AppURL = h.appURL
+	} else {
+		h.appURL = settings.Meta.AppURL
 	}
 	if err := e.App.Save(settings); err != nil {
 		return err
@@ -297,3 +300,30 @@ func (h *Hub) MakeLink(parts ...string) string {
 	}
 	return base
 }
+
+type SystemInfo struct {
+	Name   string `json:"name"`
+	Id     string `json:"id"`
+	Status string `json:"status"`
+	Port   uint16 `json:"port"`
+	Host   string `json:"host"`
+	Info   string `json:"info"`
+}
+
+func (h *Hub) getUserSystemsFromRequest(req *http.Request) ([]SystemInfo, error) {
+	systems := []SystemInfo{}
+	token, err := req.Cookie("beszauth")
+	if err != nil {
+		return systems, err
+	}
+	if token.Value != "" {
+		user, err := h.FindAuthRecordByToken(token.Value)
+		if err != nil {
+			return systems, err
+		}
+		h.DB().NewQuery("SELECT s.id, s.info, s.status, s.name, s.port, s.host FROM systems s JOIN json_each(s.users) AS je WHERE je.value = {:user_id}").Bind(dbx.Params{
+			"user_id": user.Id,
+		}).All(&systems)
+	}
+	return systems, err
+}

beszel/internal/hub/server_development.go

@@ -3,18 +3,96 @@
 package hub
 
 import (
+	"beszel"
+	"encoding/json"
+	"fmt"
+	"io"
+	"log/slog"
+	"net/http"
 	"net/http/httputil"
 	"net/url"
+	"strings"
 
 	"github.com/pocketbase/pocketbase/core"
 )
 
+// responseModifier wraps an http.RoundTripper to modify HTML responses
+type responseModifier struct {
+	transport http.RoundTripper
+	hub       *Hub
+}
+
+// RoundTrip implements http.RoundTripper interface with response modification
+func (rm *responseModifier) RoundTrip(req *http.Request) (*http.Response, error) {
+	resp, err := rm.transport.RoundTrip(req)
+	if err != nil {
+		return resp, err
+	}
+
+	// Only modify HTML responses
+	contentType := resp.Header.Get("Content-Type")
+	if !strings.Contains(contentType, "text/html") {
+		return resp, nil
+	}
+
+	// Read the response body
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return resp, err
+	}
+	resp.Body.Close()
+
+	// Modify the HTML content here
+	modifiedBody := rm.modifyHTML(string(body), req)
+
+	// Create a new response with the modified body
+	resp.Body = io.NopCloser(strings.NewReader(modifiedBody))
+	resp.ContentLength = int64(len(modifiedBody))
+	resp.Header.Set("Content-Length", fmt.Sprintf("%d", len(modifiedBody)))
+
+	return resp, nil
+}
+
+// modifyHTML applies modifications to HTML content
+func (rm *responseModifier) modifyHTML(html string, req *http.Request) string {
+	parsedURL, err := url.Parse(rm.hub.appURL)
+	if err != nil {
+		return html
+	}
+	// fix base paths in html if using subpath
+	basePath := strings.TrimSuffix(parsedURL.Path, "/") + "/"
+	html = strings.ReplaceAll(html, "./", basePath)
+	html = strings.Replace(html, "{{V}}", beszel.Version, 1)
+	slog.Info("modifying HTML", "appURL", rm.hub.appURL)
+	html = strings.Replace(html, "{{HUB_URL}}", rm.hub.appURL, 1)
+
+	systems, err := rm.hub.getUserSystemsFromRequest(req)
+	if err != nil {
+		return html
+	}
+	systemsJson, err := json.Marshal(systems)
+	if err != nil {
+		return html
+	}
+	html = strings.Replace(html, "'{SYSTEMS}'", string(systemsJson), 1)
+
+	return html
+}
+
 // startServer sets up the development server for Beszel
 func (h *Hub) startServer(se *core.ServeEvent) error {
+	slog.Info("starting server", "appURL", h.appURL)
 	proxy := httputil.NewSingleHostReverseProxy(&url.URL{
 		Scheme: "http",
 		Host:   "localhost:5173",
 	})
+
+	// Set up custom transport with response modification
+	proxy.Transport = &responseModifier{
+		transport: http.DefaultTransport,
+		hub:       h,
+	}
+
 	se.Router.GET("/{path...}", func(e *core.RequestEvent) error {
 		proxy.ServeHTTP(e.Response, e.Request)
 		return nil

beszel/internal/hub/server_production.go

@@ -5,7 +5,9 @@ package hub
 import (
 	"beszel"
 	"beszel/site"
+	"encoding/json"
 	"io/fs"
+	"log/slog"
 	"net/http"
 	"net/url"
 	"strings"
@@ -24,9 +26,9 @@ func (h *Hub) startServer(se *core.ServeEvent) error {
 	// fix base paths in html if using subpath
 	basePath := strings.TrimSuffix(parsedURL.Path, "/") + "/"
 	indexFile, _ := fs.ReadFile(site.DistDirFS, "index.html")
-	indexContent := strings.ReplaceAll(string(indexFile), "./", basePath)
-	indexContent = strings.Replace(indexContent, "{{V}}", beszel.Version, 1)
-	indexContent = strings.Replace(indexContent, "{{HUB_URL}}", h.appURL, 1)
+	html := strings.ReplaceAll(string(indexFile), "./", basePath)
+	html = strings.Replace(html, "{{V}}", beszel.Version, 1)
+	html = strings.Replace(html, "{{HUB_URL}}", h.appURL, 1)
 	// set up static asset serving
 	staticPaths := [2]string{"/static/", "/assets/"}
 	serveStatic := apis.Static(site.DistDirFS, false)
@@ -45,7 +47,16 @@ func (h *Hub) startServer(se *core.ServeEvent) error {
 			e.Response.Header().Del("X-Frame-Options")
 			e.Response.Header().Set("Content-Security-Policy", csp)
 		}
-		return e.HTML(http.StatusOK, indexContent)
+		systems, err := h.getUserSystemsFromRequest(e.Request)
+		if err != nil {
+			slog.Error("error getting user systems", "error", err)
+		}
+		systemsJson, err := json.Marshal(systems)
+		if err != nil {
+			slog.Error("error marshalling user systems", "error", err)
+		}
+		html = strings.Replace(html, "'{SYSTEMS}'", string(systemsJson), 1)
+		return e.HTML(http.StatusOK, html)
 	})
 	return nil
 }