Use sql database instead of bolt

metrics.go

@@ -5,12 +5,11 @@ import (
 	"net/http"
 	"time"
 
-	"gitea.hashru.nl/dsprenkels/rushlink/internal/boltdb"
+	"gitea.hashru.nl/dsprenkels/rushlink/internal/db"
 	"github.com/gorilla/mux"
 	"github.com/pkg/errors"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
-	bolt "go.etcd.io/bbolt"
 )
 
 const metricNamespace = "rushlink"
@@ -22,14 +21,14 @@ var metricRequestsTotalCounter = prometheus.NewCounterVec(prometheus.CounterOpts
 	Help:      "How many HTTP requests processed, partitioned by status code and HTTP method.",
 }, []string{"code", "method"})
 
-func metricURLsTotal(database *boltdb.Database) float64 {
+func metricURLsTotal(database *db.Database) float64 {
 	var metric float64
-	if err := database.Bolt.View(func(tx *bolt.Tx) error {
-		bucket := tx.Bucket([]byte("pastes"))
-		if bucket == nil {
-			return errors.New("bucket 'pastes' could not be found")
+	if err := database.Transaction(func(tx *db.Database) error {
+		var count int64
+		if err := database.Model(&db.Paste{}).Count(&count).Error; err != nil {
+			return err
 		}
-		metric = float64(bucket.Stats().KeyN)
+		metric = float64(count)
 		return nil
 	}); err != nil {
 		log.Printf("error: %v", errors.Wrap(err, "fetching pastes_total metric"))
@@ -39,7 +38,7 @@ func metricURLsTotal(database *boltdb.Database) float64 {
 }
 
 // StartMetricsServer starts sering Prometheus metrics exports on addr
-func StartMetricsServer(addr string, database *boltdb.Database, fs *boltdb.FileStore) {
+func StartMetricsServer(addr string, database *db.Database, fs *db.FileStore) {
 	prometheus.MustRegister(metricRequestsTotalCounter)
 
 	prometheus.MustRegister(prometheus.NewGaugeFunc(prometheus.GaugeOpts{