Consolidate JailInfo function to own connector_global.go and also remove old FetchBanEvents function

internal/fail2ban/connector_global.go

@@ -0,0 +1,125 @@
+// Fail2ban UI - A Swiss made, management interface for Fail2ban.
+//
+// Copyright (C) 2026 Swissmakers GmbH (https://swissmakers.ch)
+//
+// Licensed under the GNU General Public License, Version 3 (GPL-3.0)
+// You may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.gnu.org/licenses/gpl-3.0.en.html
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Shared types, helpers, and high-level functions used across all connectors.
+package fail2ban
+
+import (
+	"context"
+	"sort"
+	"sync"
+)
+
+// =========================================================================
+//  Types
+// =========================================================================
+
+// JailInfo holds summary data for a single Fail2ban jail.
+type JailInfo struct {
+	JailName      string   `json:"jailName"`
+	TotalBanned   int      `json:"totalBanned"`
+	NewInLastHour int      `json:"newInLastHour"`
+	BannedIPs     []string `json:"bannedIPs"`
+	Enabled       bool     `json:"enabled"`
+}
+
+// =========================================================================
+//  Service Control
+// =========================================================================
+
+// RestartFail2ban restarts (or reloads) the Fail2ban service on the given server.
+func RestartFail2ban(serverID string) (string, error) {
+	manager := GetManager()
+	var (
+		conn Connector
+		err  error
+	)
+	if serverID != "" {
+		conn, err = manager.Connector(serverID)
+	} else {
+		conn, err = manager.DefaultConnector()
+	}
+	if err != nil {
+		return "", err
+	}
+	if withMode, ok := conn.(interface {
+		RestartWithMode(ctx context.Context) (string, error)
+	}); ok {
+		return withMode.RestartWithMode(context.Background())
+	}
+	if err := conn.Restart(context.Background()); err != nil {
+		return "", err
+	}
+	return "restart", nil
+}
+
+// =========================================================================
+//  Jail Info Collection
+// =========================================================================
+
+// bannedIPsFn is the signature used by any connector's GetBannedIPs method.
+type bannedIPsFn func(ctx context.Context, jail string) ([]string, error)
+
+// collectJailInfos fans out to fetch banned IPs for each jail concurrently,
+// then returns the results sorted alphabetically. Both the local and SSH
+// connectors delegate to this function from their GetJailInfos methods.
+func collectJailInfos(ctx context.Context, jails []string, getBannedIPs bannedIPsFn) ([]JailInfo, error) {
+	type jailResult struct {
+		jail JailInfo
+		err  error
+	}
+	results := make(chan jailResult, len(jails))
+	var wg sync.WaitGroup
+
+	for _, jail := range jails {
+		wg.Add(1)
+		go func(j string) {
+			defer wg.Done()
+			ips, err := getBannedIPs(ctx, j)
+			if err != nil {
+				results <- jailResult{err: err}
+				return
+			}
+			results <- jailResult{
+				jail: JailInfo{
+					JailName:    j,
+					TotalBanned: len(ips),
+					BannedIPs:   ips,
+					Enabled:     true,
+				},
+			}
+		}(jail)
+	}
+
+	go func() {
+		wg.Wait()
+		close(results)
+	}()
+
+	var infos []JailInfo
+	for r := range results {
+		if r.err != nil {
+			continue
+		}
+		infos = append(infos, r.jail)
+	}
+
+	sort.SliceStable(infos, func(i, j int) bool {
+		return infos[i].JailName < infos[j].JailName
+	})
+
+	return infos, nil
+}