feat: add label 'state' to metric 'gitea_users' (#34326)

This PR adds the label _state_ to the metric _gitea_users_. With the
change, _gitea_users_ would be reported like this:

```
...
# HELP gitea_users Number of Users
# TYPE gitea_users gauge
gitea_users{state="active"} 20
gitea_users{state="inactive"} 10
...
```

The metrics above would be from a Gitea instance with 30 user accounts.
20 of the accounts are active and 10 of the accounts are not active.

Resolve #34325

models/activities/statistic.go

@@ -17,13 +17,15 @@ import (
 	repo_model "code.gitea.io/gitea/models/repo"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/models/webhook"
+	"code.gitea.io/gitea/modules/optional"
 	"code.gitea.io/gitea/modules/setting"
 )
 
 // Statistic contains the database statistics
 type Statistic struct {
 	Counter struct {
-		User, Org, PublicKey,
+		UsersActive, UsersNotActive,
+		Org, PublicKey,
 		Repo, Watch, Star, Access,
 		Issue, IssueClosed, IssueOpen,
 		Comment, Oauth, Follow,
@@ -53,7 +55,19 @@ type IssueByRepositoryCount struct {
 // GetStatistic returns the database statistics
 func GetStatistic(ctx context.Context) (stats Statistic) {
 	e := db.GetEngine(ctx)
-	stats.Counter.User = user_model.CountUsers(ctx, nil)
+
+	// Number of active users
+	usersActiveOpts := user_model.CountUserFilter{
+		IsActive: optional.Some(true),
+	}
+	stats.Counter.UsersActive = user_model.CountUsers(ctx, &usersActiveOpts)
+
+	// Number of inactive users
+	usersNotActiveOpts := user_model.CountUserFilter{
+		IsActive: optional.Some(false),
+	}
+	stats.Counter.UsersNotActive = user_model.CountUsers(ctx, &usersNotActiveOpts)
+
 	stats.Counter.Org, _ = db.Count[organization.Organization](ctx, organization.FindOrgOptions{IncludePrivate: true})
 	stats.Counter.PublicKey, _ = e.Count(new(asymkey_model.PublicKey))
 	stats.Counter.Repo, _ = repo_model.CountRepositories(ctx, repo_model.CountRepositoryOptions{})

models/user/user.go

@@ -828,6 +828,7 @@ func IsLastAdminUser(ctx context.Context, user *User) bool {
 type CountUserFilter struct {
 	LastLoginSince *int64
 	IsAdmin        optional.Option[bool]
+	IsActive       optional.Option[bool]
 }
 
 // CountUsers returns number of users.
@@ -848,6 +849,10 @@ func countUsers(ctx context.Context, opts *CountUserFilter) int64 {
 		if opts.IsAdmin.Has() {
 			cond = cond.And(builder.Eq{"is_admin": opts.IsAdmin.Value()})
 		}
+
+		if opts.IsActive.Has() {
+			cond = cond.And(builder.Eq{"is_active": opts.IsActive.Value()})
+		}
 	}
 
 	count, err := sess.Where(cond).Count(new(User))

modules/metrics/collector.go

@@ -184,7 +184,7 @@ func NewCollector() Collector {
 		Users: prometheus.NewDesc(
 			namespace+"users",
 			"Number of Users",
-			nil, nil,
+			[]string{"state"}, nil,
 		),
 		Watches: prometheus.NewDesc(
 			namespace+"watches",
@@ -373,7 +373,14 @@ func (c Collector) Collect(ch chan<- prometheus.Metric) {
 	ch <- prometheus.MustNewConstMetric(
 		c.Users,
 		prometheus.GaugeValue,
-		float64(stats.Counter.User),
+		float64(stats.Counter.UsersActive),
+		"active", // state label
+	)
+	ch <- prometheus.MustNewConstMetric(
+		c.Users,
+		prometheus.GaugeValue,
+		float64(stats.Counter.UsersNotActive),
+		"inactive", // state label
 	)
 	ch <- prometheus.MustNewConstMetric(
 		c.Watches,