From 895d5fea41177e444c18f4fdc820fffa5f67d5bf Mon Sep 17 00:00:00 2001
From: Rasmus Dahlberg <rasmus@rgdd.se>
Date: Sat, 9 Dec 2023 17:08:45 +0100
Subject: Add drafty skeleton

---
 internal/manager/helpers.go | 52 +++++++++++++++++++++++++
 internal/manager/manager.go | 94 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 146 insertions(+)
 create mode 100644 internal/manager/helpers.go
 create mode 100644 internal/manager/manager.go

(limited to 'internal/manager')

diff --git a/internal/manager/helpers.go b/internal/manager/helpers.go
new file mode 100644
index 0000000..a9a2158
--- /dev/null
+++ b/internal/manager/helpers.go
@@ -0,0 +1,52 @@
+package manager
+
+import (
+	"crypto/sha256"
+	"encoding/base64"
+	"fmt"
+
+	ct "github.com/google/certificate-transparency-go"
+	"gitlab.torproject.org/rgdd/ct/pkg/metadata"
+	"rgdd.se/silent-ct/pkg/monitor"
+)
+
+func selectLogs(m metadata.Metadata) []monitor.MessageLogConfig {
+	var logs []monitor.MessageLogConfig
+	for _, operator := range m.Operators {
+		for _, log := range operator.Logs {
+			if log.State == nil {
+				continue // ignore logs without a state (should not happen)
+			}
+			if log.State.Name == metadata.LogStatePending {
+				continue // log is not yet relevant
+			}
+			if log.State.Name == metadata.LogStateRetired {
+				continue // log is not expected to be reachable
+			}
+			if log.State.Name == metadata.LogStateRejected {
+				continue // log is not expected to be reachable
+			}
+
+			// FIXME: remove me instead of hard coding Argon 2024
+			id, _ := log.Key.ID()
+			got := fmt.Sprintf("%s", base64.StdEncoding.EncodeToString(id[:]))
+			want := "7s3QZNXbGs7FXLedtM0TojKHRny87N7DUUhZRnEftZs="
+			if got != want {
+				continue
+			}
+
+			logs = append(logs, monitor.MessageLogConfig{
+				Metadata: log,
+				State: monitor.MonitorState{
+					LogState: monitor.LogState{ct.SignedTreeHead{
+						SHA256RootHash: [sha256.Size]byte{47, 66, 110, 15, 246, 154, 8, 100, 150, 140, 206, 208, 17, 57, 112, 116, 210, 3, 19, 55, 46, 63, 209, 12, 234, 130, 225, 124, 237, 2, 64, 228},
+						TreeSize:       610650601,
+						Timestamp:      1702108968538,
+					}},
+					NextIndex: 388452203,
+				},
+			})
+		}
+	}
+	return logs
+}
diff --git a/internal/manager/manager.go b/internal/manager/manager.go
new file mode 100644
index 0000000..2210c9b
--- /dev/null
+++ b/internal/manager/manager.go
@@ -0,0 +1,94 @@
+package manager
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"os"
+	"time"
+
+	"gitlab.torproject.org/rgdd/ct/pkg/metadata"
+	"rgdd.se/silent-ct/pkg/monitor"
+	"rgdd.se/silent-ct/pkg/server"
+)
+
+const (
+	DefaultStateDir                = "/home/rgdd/.local/share/silent-ct" // FIXME
+	DefaultMetadataRefreshInterval = 1 * time.Hour
+)
+
+type Config struct {
+	StateDir string
+	Nodes    server.Nodes
+
+	MetadataRefreshInterval time.Duration
+}
+
+type Manager struct {
+	Config
+}
+
+func New(cfg Config) (Manager, error) {
+	if cfg.StateDir == "" {
+		cfg.StateDir = DefaultStateDir
+	}
+	if cfg.MetadataRefreshInterval == 0 {
+		cfg.MetadataRefreshInterval = DefaultMetadataRefreshInterval
+	}
+	return Manager{Config: cfg}, nil
+}
+
+func (mgr *Manager) Run(ctx context.Context,
+	serverCh chan server.MessageNodeSubmission,
+	monitorCh chan monitor.MessageLogProgress,
+	configCh chan []monitor.MessageLogConfig,
+	errorCh chan error) error {
+
+	md, err := mgr.metadataRead()
+	if err != nil {
+		return fmt.Errorf("read metadata: %v\n", err)
+	}
+	configCh <- selectLogs(md)
+
+	ticker := time.NewTicker(mgr.MetadataRefreshInterval)
+	defer ticker.Stop()
+
+	for {
+		select {
+		case <-ctx.Done():
+			return nil
+		case <-ticker.C:
+			mu, err := mgr.metadataUpdate(ctx, md)
+			if err != nil {
+				continue
+			}
+			if mu.Version.Major <= md.Version.Major {
+				continue
+			}
+			md = mu
+			configCh <- selectLogs(md)
+		case ev := <-monitorCh:
+			fmt.Printf("DEBUG: received event from monitor with %d matches\n", len(ev.Matches))
+		case ev := <-serverCh:
+			fmt.Printf("DEBUG: received event from server\n: %v", ev)
+		case err := <-errorCh:
+			fmt.Printf("DEBUG: received error: %v\n", err)
+		}
+	}
+}
+
+func (mgr *Manager) metadataRead() (metadata.Metadata, error) {
+	b, err := os.ReadFile(mgr.StateDir + "/metadata.json")
+	if err != nil {
+		return metadata.Metadata{}, err
+	}
+	var md metadata.Metadata
+	if err := json.Unmarshal(b, &md); err != nil {
+		return metadata.Metadata{}, err
+	}
+	return md, nil
+}
+
+func (mgr *Manager) metadataUpdate(ctx context.Context, old metadata.Metadata) (metadata.Metadata, error) {
+	return metadata.Metadata{}, fmt.Errorf("TODO: update metadata")
+}
-- 
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