Enhance /admin with full panel and subscription health checks

internal/remnawave/health.go

@@ -0,0 +1,168 @@
+package remnawave
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"strings"
+)
+
+type CheckItem struct {
+	Name   string
+	OK     bool
+	Status int
+	Detail string
+}
+
+type HealthReport struct {
+	PanelName string
+	PanelURL  string
+	Checks    []CheckItem
+	Users     int
+	Nodes     int
+	AllOK     bool
+}
+
+func (c *Client) FullCheck(ctx context.Context, subscriptionURL string) HealthReport {
+	report := HealthReport{
+		PanelName: "",
+		PanelURL:  c.baseURL,
+	}
+
+	probes := []struct {
+		name string
+		path string
+	}{
+		{"Панель (веб)", "/"},
+		{"API (статистика)", "/api/system/stats/recap"},
+		{"API (пользователи)", "/api/users"},
+		{"API (ноды)", "/api/nodes"},
+		{"Подписка (настройки)", "/api/subscription-settings"},
+		{"Подписка (API список)", "/api/subscriptions"},
+	}
+
+	for _, p := range probes {
+		item := c.probe(ctx, p.name, p.path)
+		report.Checks = append(report.Checks, item)
+
+		if p.path == "/api/users" && item.OK {
+			if n, err := c.countFromEndpoint(ctx, "/api/users", "users"); err == nil {
+				report.Users = n
+			}
+		}
+		if p.path == "/api/nodes" && item.OK {
+			if n, err := c.countFromEndpoint(ctx, "/api/nodes", "nodes"); err == nil {
+				report.Nodes = n
+			}
+		}
+	}
+
+	subURL := strings.TrimRight(strings.TrimSpace(subscriptionURL), "/")
+	if subURL != "" {
+		report.Checks = append(report.Checks, c.probePublic(ctx, "Страница подписки", subURL))
+	} else {
+		report.Checks = append(report.Checks, CheckItem{
+			Name:   "Страница подписки",
+			OK:     false,
+			Status: 0,
+			Detail: "не задана (REMNAWAVE_SUBSCRIPTION_URL)",
+		})
+	}
+
+	report.AllOK = true
+	for _, ch := range report.Checks {
+		if !ch.OK {
+			report.AllOK = false
+			break
+		}
+	}
+	return report
+}
+
+func (c *Client) probe(ctx context.Context, name, path string) CheckItem {
+	item := CheckItem{Name: name}
+
+	resp, body, err := c.get(ctx, path)
+	if err != nil {
+		item.Detail = err.Error()
+		return item
+	}
+	item.Status = resp.StatusCode
+
+	switch resp.StatusCode {
+	case http.StatusOK:
+		item.OK = true
+		item.Detail = "OK"
+	case http.StatusUnauthorized, http.StatusForbidden:
+		item.Detail = fmt.Sprintf("HTTP %d — неверный токен или нет прав", resp.StatusCode)
+	default:
+		item.Detail = fmt.Sprintf("HTTP %d: %s", resp.StatusCode, trimBody(body, 120))
+	}
+	return item
+}
+
+func (c *Client) probePublic(ctx context.Context, name, url string) CheckItem {
+	item := CheckItem{Name: name}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
+	if err != nil {
+		item.Detail = err.Error()
+		return item
+	}
+	req.Header.Set("Accept", "text/html,application/json,*/*")
+	if c.caddyToken != "" {
+		req.Header.Set("X-Api-Key", c.caddyToken)
+	}
+
+	resp, err := c.http.Do(req)
+	if err != nil {
+		item.Detail = fmt.Sprintf("нет связи: %v", err)
+		return item
+	}
+	defer resp.Body.Close()
+
+	item.Status = resp.StatusCode
+	if resp.StatusCode >= 200 && resp.StatusCode < 400 {
+		item.OK = true
+		item.Detail = fmt.Sprintf("OK (HTTP %d)", resp.StatusCode)
+	} else {
+		item.Detail = fmt.Sprintf("HTTP %d", resp.StatusCode)
+	}
+	return item
+}
+
+func FormatReport(r HealthReport, panelName, panelURL string) string {
+	var b strings.Builder
+	if panelName != "" {
+		b.WriteString(fmt.Sprintf("Панель: *%s*\nURL: `%s`\n\n", panelName, panelURL))
+	}
+
+	icon := func(ok bool) string {
+		if ok {
+			return "✅"
+		}
+		return "❌"
+	}
+
+	for _, ch := range r.Checks {
+		line := fmt.Sprintf("%s *%s*", icon(ch.OK), ch.Name)
+		if ch.Status > 0 {
+			line += fmt.Sprintf(" — HTTP %d", ch.Status)
+		}
+		if ch.Detail != "" {
+			line += ": " + ch.Detail
+		}
+		b.WriteString(line + "\n")
+	}
+
+	if r.Users > 0 || r.Nodes > 0 {
+		b.WriteString(fmt.Sprintf("\n👥 Пользователей: %d\n📡 Нод: %d", r.Users, r.Nodes))
+	}
+
+	if r.AllOK {
+		b.WriteString("\n\n✅ *Все проверки пройдены*")
+	} else {
+		b.WriteString("\n\n⚠️ *Есть ошибки* — проверьте токен, URL и страницу подписки")
+	}
+	return b.String()
+}