added teams

internal/handlers/team_shortnames_unique.go

@@ -0,0 +1,57 @@
+package handlers
+
+import (
+	"context"
+	"net/http"
+
+	"git.haelnorr.com/h/golib/hws"
+	"git.haelnorr.com/h/oslstats/internal/db"
+	"git.haelnorr.com/h/oslstats/internal/validation"
+	"github.com/pkg/errors"
+	"github.com/uptrace/bun"
+)
+
+// IsTeamShortNamesUnique checks if the combination of short_name and alt_short_name is unique
+// and also validates that they are different from each other
+func IsTeamShortNamesUnique(
+	s *hws.Server,
+	conn *bun.DB,
+) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		getter, err := validation.ParseForm(r)
+		if err != nil {
+			w.WriteHeader(http.StatusBadRequest)
+			return
+		}
+
+		shortName := getter.String("short_name").TrimSpace().ToUpper().MaxLength(3).Value
+		altShortName := getter.String("alt_short_name").TrimSpace().ToUpper().MaxLength(3).Value
+
+		if shortName == "" || altShortName == "" {
+			w.WriteHeader(http.StatusOK)
+			return
+		}
+
+		if shortName == altShortName {
+			w.WriteHeader(http.StatusConflict)
+			return
+		}
+
+		var isUnique bool
+		if ok := db.WithReadTx(s, w, r, conn, func(ctx context.Context, tx bun.Tx) (bool, error) {
+			isUnique, err = db.TeamShortNamesUnique(ctx, tx, shortName, altShortName)
+			if err != nil {
+				return false, errors.Wrap(err, "db.TeamShortNamesUnique")
+			}
+			return true, nil
+		}); !ok {
+			return
+		}
+
+		if isUnique {
+			w.WriteHeader(http.StatusOK)
+		} else {
+			w.WriteHeader(http.StatusConflict)
+		}
+	})
+}