V2 alpha - initial version (#172)

Initial alpha codebase for version 2 of WireGuard Portal.
This version is considered unstable and incomplete (for example, no public REST API)! 
Use with care!


Fixes/Implements the following issues:
 - OAuth support #154, #1 
 - New Web UI with internationalisation support #98, #107, #89, #62
 - Postgres Support #49 
 - Improved Email handling #47, #119 
 - DNS Search Domain support #46 
 - Bugfixes #94, #48 

---------

Co-authored-by: Fabian Wechselberger <wechselbergerf@hotmail.com>

internal/app/wireguard/statistics_test.go

@@ -0,0 +1,134 @@
+package wireguard
+
+import (
+	"github.com/h44z/wg-portal/internal/domain"
+	"reflect"
+	"testing"
+	"time"
+)
+
+func Test_getSessionStartTime(t *testing.T) {
+	now := time.Now()
+	nowMinus1 := now.Add(-1 * time.Minute)
+	nowMinus3 := now.Add(-3 * time.Minute)
+	nowMinus5 := now.Add(-5 * time.Minute)
+
+	type args struct {
+		oldStats       domain.PeerStatus
+		newReceived    uint64
+		newTransmitted uint64
+		lastHandshake  *time.Time
+	}
+	tests := []struct {
+		name string
+		args args
+		want *time.Time
+	}{
+		{
+			name: "not connected",
+			args: args{
+				newReceived:    0,
+				newTransmitted: 0,
+				lastHandshake:  nil,
+			},
+			want: nil,
+		},
+		{
+			name: "freshly connected",
+			args: args{
+				oldStats:       domain.PeerStatus{LastSessionStart: &nowMinus1},
+				newReceived:    100,
+				newTransmitted: 100,
+				lastHandshake:  &now,
+			},
+			want: &now,
+		},
+		{
+			name: "freshly connected (no prev session)",
+			args: args{
+				oldStats:       domain.PeerStatus{LastSessionStart: nil},
+				newReceived:    100,
+				newTransmitted: 100,
+				lastHandshake:  &now,
+			},
+			want: &now,
+		},
+		{
+			name: "freshly connected (no prev session but bytes)",
+			args: args{
+				oldStats:       domain.PeerStatus{LastSessionStart: nil, BytesReceived: 10, BytesTransmitted: 20},
+				newReceived:    100,
+				newTransmitted: 100,
+				lastHandshake:  &now,
+			},
+			want: &now,
+		},
+		{
+			name: "still connected",
+			args: args{
+				oldStats:       domain.PeerStatus{LastSessionStart: &nowMinus1, BytesReceived: 10, BytesTransmitted: 10},
+				newReceived:    100,
+				newTransmitted: 100,
+				lastHandshake:  &now,
+			},
+			want: &nowMinus1,
+		},
+		{
+			name: "no longer connected",
+			args: args{
+				oldStats:       domain.PeerStatus{LastSessionStart: &nowMinus5, BytesReceived: 100, BytesTransmitted: 100},
+				newReceived:    100,
+				newTransmitted: 100,
+				lastHandshake:  &nowMinus3,
+			},
+			want: &nowMinus5,
+		},
+		{
+			name: "reconnect (recv, hs outdated)",
+			args: args{
+				oldStats:       domain.PeerStatus{LastHandshake: &nowMinus5, BytesReceived: 100, BytesTransmitted: 100},
+				newReceived:    10,
+				newTransmitted: 100,
+				lastHandshake:  &nowMinus1,
+			},
+			want: &nowMinus1,
+		},
+		{
+			name: "reconnect (recv)",
+			args: args{
+				oldStats:       domain.PeerStatus{LastHandshake: &nowMinus1, BytesReceived: 100, BytesTransmitted: 100},
+				newReceived:    10,
+				newTransmitted: 100,
+				lastHandshake:  &now,
+			},
+			want: &now,
+		},
+		{
+			name: "reconnect (sent, hs outdated)",
+			args: args{
+				oldStats:       domain.PeerStatus{LastHandshake: &nowMinus5, BytesReceived: 100, BytesTransmitted: 100},
+				newReceived:    100,
+				newTransmitted: 10,
+				lastHandshake:  &nowMinus1,
+			},
+			want: &nowMinus1,
+		},
+		{
+			name: "reconnect (sent)",
+			args: args{
+				oldStats:       domain.PeerStatus{LastSessionStart: &nowMinus1, BytesReceived: 100, BytesTransmitted: 100},
+				newReceived:    100,
+				newTransmitted: 10,
+				lastHandshake:  &now,
+			},
+			want: &now,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := getSessionStartTime(tt.args.oldStats, tt.args.newReceived, tt.args.newTransmitted, tt.args.lastHandshake); !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("getSessionStartTime() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}