feat(ynab): delay setting

Some banks change transaction IDs after some time, use this setting to
trade real-time updates with reliability if needed.

commit-id:a747bfc4

ghstack-source-id: ad19b761beb0dd5c0fef3d2bd9a07d58dfd187a4
Pull Request resolved: #83

config.go

@@ -137,6 +137,11 @@ type YNAB struct {
 	// example: 2006-01-02
 	FromDate Date `envconfig:"YNAB_FROM_DATE"`
 
+	// Delay sending transaction to YNAB by this duration. This can be necessary
+	// if the bank changes transaction IDs after some time. Default is 0 (no
+	// delay).
+	Delay time.Duration `envconfig:"YNAB_DELAY" default:"0"`
+
 	// Set cleared status, possible values: cleared, uncleared, reconciled .
 	// Default is uncleared for historical reasons but recommend setting this
 	// to cleared because ynabber transactions are cleared by bank.

writer/ynab/ynab.go

@@ -123,12 +123,15 @@ func (w Writer) toYNAB(t ynabber.Transaction) (Ytransaction, error) {
 	}, nil
 }
 
-// validTransaction checks if date is within the limits of YNAB and w.Config.
+// validTransaction checks if date is within the limits of YNAB and
+// ynabber.Config.
 func (w Writer) validTransaction(date time.Time) bool {
-	fiveYearsAgo := time.Now().AddDate(-5, 0, 0)
-	return !date.Before(fiveYearsAgo) &&
-		!date.Before(time.Time(w.Config.YNAB.FromDate)) &&
-		!date.After(time.Now())
+	now := time.Now()
+	fiveYearsAgo := now.AddDate(-5, 0, 0)
+	fromDate := time.Time(w.Config.YNAB.FromDate)
+	delay := w.Config.YNAB.Delay
+
+	return date.After(fiveYearsAgo) && date.After(fromDate) && date.Before(now.Add(-delay))
 }
 
 func (w Writer) Bulk(t []ynabber.Transaction) error {

writer/ynab/ynab_test.go

@@ -162,46 +162,56 @@ func TestYnabberToYNAB(t *testing.T) {
 }
 
 func TestValidTransaction(t *testing.T) {
-	fromDate := time.Now().AddDate(-1, 0, 0)
-	mockFromDate := ynabber.Date(fromDate)
-	writer := Writer{
-		Config: &ynabber.Config{
-			YNAB: ynabber.YNAB{
-				FromDate: mockFromDate,
-			},
-		},
-	}
+	yesterday := time.Now().AddDate(-1, 0, 0)
+	writer := Writer{Config: &ynabber.Config{}, logger: nil}
 
 	tests := []struct {
-		name string
-		date time.Time
-		want bool
+		name     string
+		date     time.Time
+		fromDate time.Time
+		delay    time.Duration
+		want     bool
 	}{
 		{
-			name: "Yesterday",
-			date: time.Now().AddDate(0, 0, -1),
-			want: true,
+			name:     "Yesterday",
+			date:     time.Now().AddDate(0, 0, -1),
+			fromDate: yesterday,
+			delay:    0, // Default value
+			want:     true,
 		},
 		{
-			name: "Tomorrow",
-			date: time.Now().AddDate(0, 0, 1),
-			want: false,
+			name:     "Day before yesterday (25h delay)",
+			date:     time.Now().AddDate(0, 0, -2),
+			fromDate: yesterday,
+			delay:    25 * time.Hour,
+			want:     true,
 		},
 		{
-			name: "5 years ago",
-			date: time.Now().AddDate(-5, 0, 0),
-			want: false,
+			name:     "Tomorrow",
+			date:     time.Now().AddDate(0, 0, 1),
+			fromDate: yesterday,
+			want:     false,
 		},
 		{
-			name: "Before FromDate",
-			date: fromDate.AddDate(0, 0, -1),
-			want: false,
+			name:     "5 years ago",
+			date:     time.Now().AddDate(-5, 0, 0),
+			fromDate: yesterday,
+			want:     false,
+		},
+		{
+			name:     "Before FromDate",
+			date:     yesterday.AddDate(0, 0, -1),
+			fromDate: yesterday,
+			want:     false,
 		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
+			writer.Config.YNAB.FromDate = ynabber.Date(tt.fromDate)
+			writer.Config.YNAB.Delay = tt.delay
+
 			if got := writer.validTransaction(tt.date); got != tt.want {
-				t.Errorf("validTransaction() = %v, want %v", got, tt.want)
+				t.Errorf("got = %v, want %v", got, tt.want)
 			}
 		})
 	}