Pull request 1817: AG-20352-imp-leases-db

Merge in DNS/adguard-home from AG-20352-imp-leases-db to master

Squashed commit of the following:

commit 2235fb4671bb3f80c933847362cd35b5704dd18d
Merge: 0c4d76d4f 76a74b271
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Tue Apr 18 15:09:34 2023 +0300

    Merge branch 'master' into AG-20352-imp-leases-db

commit 0c4d76d4f6222ae06c568864d366df866dc55a54
Merge: e586b82c7 4afd39b22
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Tue Apr 18 11:07:27 2023 +0300

    Merge branch 'master' into AG-20352-imp-leases-db

commit e586b82c700c4d432e34f36400519eb08b2653ad
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Tue Apr 18 11:06:40 2023 +0300

    dhcpd: imp docs

commit 411d4e6f6e36051bf6a66c709380ed268c161c41
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Mon Apr 17 16:56:56 2023 +0300

    dhcpd: imp code

commit e457dc2c385ab62b36df7f96c949e6b90ed2034a
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Mon Apr 17 14:29:29 2023 +0300

    all: imp code more

commit c2df20d0125d368d0155af0808af979921763e1f
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Fri Apr 14 15:07:53 2023 +0300

    all: imp code

commit a4e9ffb9ae769c828c22d62ddf231f7bcfea14db
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Wed Apr 12 19:19:35 2023 +0300

    dhcpd: fix test more

commit 138d89414f1a89558b23962acb7174dce28346d9
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Wed Apr 12 18:08:29 2023 +0300

    dhcpd: fix test

commit e07e7a23e7c913951c8ecb38c12a3345ebe473be
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Wed Apr 12 17:22:27 2023 +0300

    all: upd chlog

commit 1b6a76e79cf4beed9ca980766ce97930b375bfde
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Wed Apr 12 13:24:11 2023 +0300

    all: migrate leases db

internal/dhcpd/migrate_internal_test.go

@@ -0,0 +1,73 @@
+package dhcpd
+
+import (
+	"encoding/json"
+	"net"
+	"net/netip"
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+const testData = `[
+{"mac":"ESIzRFVm","ip":"AQIDBA==","host":"test1","exp":1},
+{"mac":"ZlVEMyIR","ip":"BAMCAQ==","host":"test2","exp":1231231231}
+]`
+
+func TestMigrateDB(t *testing.T) {
+	dir := t.TempDir()
+
+	oldLeasesPath := filepath.Join(dir, dbFilename)
+	dataDirPath := filepath.Join(dir, dataFilename)
+
+	err := os.WriteFile(oldLeasesPath, []byte(testData), 0o644)
+	require.NoError(t, err)
+
+	wantLeases := []*Lease{{
+		Expiry:   time.Time{},
+		Hostname: "test1",
+		HWAddr:   net.HardwareAddr{0x11, 0x22, 0x33, 0x44, 0x55, 0x66},
+		IP:       netip.MustParseAddr("1.2.3.4"),
+		IsStatic: true,
+	}, {
+		Expiry:   time.Unix(1231231231, 0),
+		Hostname: "test2",
+		HWAddr:   net.HardwareAddr{0x66, 0x55, 0x44, 0x33, 0x22, 0x11},
+		IP:       netip.MustParseAddr("4.3.2.1"),
+		IsStatic: false,
+	}}
+
+	conf := &ServerConfig{
+		WorkDir: dir,
+		DataDir: dir,
+	}
+
+	err = migrateDB(conf)
+	require.NoError(t, err)
+
+	_, err = os.Stat(oldLeasesPath)
+	require.ErrorIs(t, err, os.ErrNotExist)
+
+	var data []byte
+	data, err = os.ReadFile(dataDirPath)
+	require.NoError(t, err)
+
+	dl := &dataLeases{}
+	err = json.Unmarshal(data, dl)
+	require.NoError(t, err)
+
+	leases := dl.Leases
+
+	for i, wl := range wantLeases {
+		assert.Equal(t, wl.Hostname, leases[i].Hostname)
+		assert.Equal(t, wl.HWAddr, leases[i].HWAddr)
+		assert.Equal(t, wl.IP, leases[i].IP)
+		assert.Equal(t, wl.IsStatic, leases[i].IsStatic)
+
+		require.True(t, wl.Expiry.Equal(leases[i].Expiry))
+	}
+}