ProxyCheckEnabled detection draft

assets/views/settings.jet.html

@@ -81,6 +81,23 @@
                                     proxy or one of the provided external proxy servers. If you prefer, you can
                                     also specify a custom proxy server by entering its URL and clicking 'Save Changes'.
                                 </p>
+                                {{ if .ProxyCheckEnabled == false }}
+                                <div class="alert alert-warning" role="alert">
+                                    <p>
+                                        <i class="bi bi-exclamation-triangle-fill"></i> This PixivFE instance has been configured to <span class="fw-bold">not</span> check the list of built-in image proxies (<a href="https://pixivfe-docs.pages.dev/hosting/environment-variables/#pixivfe_proxy_check_enabled" class="text-decoration-none"><code class="bg-dark-subtle rounded p-1">PIXIVFE_PROXY_CHECK_ENABLED=false</code></a> has been set).
+                                    </p>
+                                    <p class="mb-0">
+                                        All image proxies will be shown by default, regardless of their actual state.
+                                    </p>
+                                </div>
+                                {{- else -}}
+                                <p>
+                                    This PixivFE instance has been configured to check the list of built-in image proxies every {{ .ProxyCheckInterval }}.
+                                </p>
+                                <p>
+                                    Image proxies that fail this check will not be shown unless "Show all proxy servers" is enabled.
+                                </p>
+                                {{- end -}}
                                 <form action="/settings/imageServer" method="post">
                                     <div class="mb-3 form-check form-switch">
                                         <input class="form-check-input" type="checkbox" role="switch" id="show-all-proxies">

server/routes/settings.go

@@ -169,7 +169,12 @@ func resetAll(w http.ResponseWriter, _ *http.Request) error {
 }
 
 func SettingsPage(w http.ResponseWriter, r *http.Request) error {
-	return RenderHTML(w, r, Data_settings{WorkingProxyList: proxy_checker.GetWorkingProxies(), ProxyList: config.BuiltinProxyList})
+	return RenderHTML(w, r, Data_settings{
+		WorkingProxyList:   proxy_checker.GetWorkingProxies(),
+		ProxyList:          config.BuiltinProxyList,
+		ProxyCheckEnabled:  config.GlobalConfig.ProxyCheckEnabled,  // Used to check whether proxy_checker is enabled on the instance
+		ProxyCheckInterval: config.GlobalConfig.ProxyCheckInterval, // Used to display the ProxyCheckInterval configured on the instance
+	})
 }
 
 func SettingsPost(w http.ResponseWriter, r *http.Request) error {

server/routes/types.go

@@ -6,6 +6,7 @@ import (
 	"codeberg.org/vnpower/pixivfe/v2/core"
 	"codeberg.org/vnpower/pixivfe/v2/server/request_context"
 	"codeberg.org/vnpower/pixivfe/v2/server/template"
+	"time"
 )
 
 func RenderHTML[T any](w http.ResponseWriter, r *http.Request, data T) error {
@@ -129,8 +130,10 @@ type Data_rankingCalendar struct {
 	ThisMonth   DateWrap
 }
 type Data_settings struct {
-	ProxyList        []string
-	WorkingProxyList []string
+	ProxyList          []string
+	WorkingProxyList   []string
+	ProxyCheckEnabled  bool
+	ProxyCheckInterval time.Duration
 }
 type Data_tag struct {
 	Title            string