feat(hub): add OAUTH_DISABLE_POPUP env var (#1900)

Co-authored-by: henrygd <hank@henrygd.me>

internal/hub/server.go

@@ -0,0 +1,42 @@
+package hub
+
+import (
+	"encoding/json"
+	"net/url"
+	"strings"
+
+	"github.com/henrygd/beszel"
+	"github.com/henrygd/beszel/internal/hub/utils"
+)
+
+// PublicAppInfo defines the structure of the public app information that will be injected into the HTML
+type PublicAppInfo struct {
+	BASE_PATH           string
+	HUB_VERSION         string
+	HUB_URL             string
+	OAUTH_DISABLE_POPUP bool `json:"OAUTH_DISABLE_POPUP,omitempty"`
+}
+
+// modifyIndexHTML injects the public app information into the index.html content
+func modifyIndexHTML(hub *Hub, html []byte) string {
+	info := getPublicAppInfo(hub)
+	content, err := json.Marshal(info)
+	if err != nil {
+		return string(html)
+	}
+	htmlContent := strings.ReplaceAll(string(html), "./", info.BASE_PATH)
+	return strings.Replace(htmlContent, "\"{info}\"", string(content), 1)
+}
+
+func getPublicAppInfo(hub *Hub) PublicAppInfo {
+	parsedURL, _ := url.Parse(hub.appURL)
+	info := PublicAppInfo{
+		BASE_PATH:   strings.TrimSuffix(parsedURL.Path, "/") + "/",
+		HUB_VERSION: beszel.Version,
+		HUB_URL:     hub.appURL,
+	}
+	if val, _ := utils.GetEnv("OAUTH_DISABLE_POPUP"); val == "true" {
+		info.OAUTH_DISABLE_POPUP = true
+	}
+	return info
+}