Simplify handling with custom JSON time

.golangci.yml

@@ -137,6 +137,6 @@ issues:
       linters:
         - funlen
         - dupl
-    - path: pkg/apis/team_types.go
+    - path: pkg/apis/team_methods.go
       linters:
         - wrapcheck

internal/shiftplan/default_rules.go

@@ -21,7 +21,7 @@ func (d *DefaultRule) Match(employee apis.Employee, shifts []apis.Shift, start t
 func VacationConflict() *DefaultRule {
 	return &DefaultRule{
 		fn: func(e apis.Employee, _ []apis.Shift, start time.Time, end time.Time) bool {
-			days := e.Vacations()
+			days := e.VacationDays
 			for vIdx := range days {
 				day := days[vIdx]
 				if (day.After(start) && day.Before(end)) || day.Equal(start) || day.Equal(end) {

internal/shiftplan/default_rules_test.go

@@ -21,7 +21,7 @@ func TestVacationConflict(t *testing.T) {
 		{
 			name: "Should detect conflict if employee has holiday between scheduled shift",
 			args: args{
-				employee: apis.Employee{ID: "a", Name: "a", VacationDays: []string{"2024-01-01"}},
+				employee: apis.Employee{ID: "a", Name: "a", VacationDays: vacationDays("2024-01-01")},
 				start:    date("2024-01-01"),
 				end:      date("2024-01-02"),
 			},
@@ -39,7 +39,7 @@ func TestVacationConflict(t *testing.T) {
 		{
 			name: "Should not detect conflict if employee has holiday outside scheduled shift",
 			args: args{
-				employee: apis.Employee{ID: "a", Name: "a", VacationDays: []string{"2024-01-03"}},
+				employee: apis.Employee{ID: "a", Name: "a", VacationDays: vacationDays("2024-01-03")},
 				start:    date("2024-01-01"),
 				end:      date("2024-01-02"),
 			},

internal/shiftplan/planner_test.go

@@ -57,7 +57,7 @@ func TestPlanner_Plan(t *testing.T) {
 		{
 			name: "Should not schedule Primary on holiday days",
 			employees: []apis.Employee{
-				{ID: "a@test.ch", Name: "a", VacationDays: []string{"2020-04-01"}},
+				{ID: "a@test.ch", Name: "a", VacationDays: vacationDays("2020-04-01")},
 				{ID: "b@test.ch", Name: "b", VacationDays: nil},
 				{ID: "c@test.ch", Name: "c", VacationDays: nil},
 				{ID: "d@test.ch", Name: "d", VacationDays: nil},
@@ -99,7 +99,7 @@ func TestPlanner_Plan(t *testing.T) {
 			name: "Should not schedule Secondary on holiday days",
 			employees: []apis.Employee{
 				{ID: "a@test.ch", Name: "a", VacationDays: nil},
-				{ID: "b@test.ch", Name: "b", VacationDays: []string{"2020-04-01"}},
+				{ID: "b@test.ch", Name: "b", VacationDays: vacationDays("2020-04-01")},
 				{ID: "c@test.ch", Name: "c", VacationDays: nil},
 				{ID: "d@test.ch", Name: "d", VacationDays: nil},
 			},
@@ -139,10 +139,10 @@ func TestPlanner_Plan(t *testing.T) {
 		{
 			name: "Should return an error if can not find next available duty",
 			employees: []apis.Employee{
-				{ID: "a@test.ch", Name: "a", VacationDays: []string{"2020-04-01"}},
-				{ID: "b@test.ch", Name: "b", VacationDays: []string{"2020-04-01"}},
-				{ID: "c@test.ch", Name: "c", VacationDays: []string{"2020-04-01"}},
-				{ID: "d@test.ch", Name: "d", VacationDays: []string{"2020-04-01"}},
+				{ID: "a@test.ch", Name: "a", VacationDays: vacationDays("2020-04-01")},
+				{ID: "b@test.ch", Name: "b", VacationDays: vacationDays("2020-04-01")},
+				{ID: "c@test.ch", Name: "c", VacationDays: vacationDays("2020-04-01")},
+				{ID: "d@test.ch", Name: "d", VacationDays: vacationDays("2020-04-01")},
 			},
 			args: args{
 				start:    date("2020-04-01"),
@@ -156,9 +156,9 @@ func TestPlanner_Plan(t *testing.T) {
 			name: "Should return an error if can not find next secondary",
 			employees: []apis.Employee{
 				{ID: "a@test.ch", Name: "a", VacationDays: nil},
-				{ID: "b@test.ch", Name: "b", VacationDays: []string{"2020-04-01"}},
-				{ID: "c@test.ch", Name: "c", VacationDays: []string{"2020-04-01"}},
-				{ID: "d@test.ch", Name: "d", VacationDays: []string{"2020-04-01"}},
+				{ID: "b@test.ch", Name: "b", VacationDays: vacationDays("2020-04-01")},
+				{ID: "c@test.ch", Name: "c", VacationDays: vacationDays("2020-04-01")},
+				{ID: "d@test.ch", Name: "d", VacationDays: vacationDays("2020-04-01")},
 			},
 			args: args{
 				start:    date("2020-04-01"),
@@ -191,3 +191,12 @@ func date(s string) time.Time {
 
 	return t
 }
+
+func vacationDays(days ...string) []apis.VacationDay {
+	var tmp = make([]apis.VacationDay, len(days))
+	for _, day := range days {
+		tmp = append(tmp, apis.VacationDay{Time: date(day)})
+	}
+
+	return tmp
+}

pkg/apis/team_methods.go

@@ -0,0 +1,18 @@
+package apis
+
+import (
+	"time"
+)
+
+func (v *VacationDay) UnmarshalJSON(data []byte) error {
+	if string(data) == "null" || string(data) == `""` {
+		return nil
+	}
+
+	t, err := time.Parse(time.DateOnly, string(data))
+	if err != nil {
+		return err
+	}
+	*v = VacationDay{t}
+	return nil
+}

pkg/apis/team_types.go

@@ -1,8 +1,6 @@
 package apis
 
 import (
-	"encoding/json"
-	"fmt"
 	"time"
 )
 
@@ -12,49 +10,12 @@ type Team struct {
 	Employees []Employee `json:"employees"`
 }
 
-type Employee struct {
-	ID              EmployeeID `json:"id"`
-	Name            string     `json:"name"`
-	VacationDays    []string   `json:"vacationDays,omitempty"`
-	parsedVacations []time.Time
+type VacationDay struct {
+	time.Time
 }
 
-func (e *Employee) UnmarshalJSON(data []byte) error {
-	type Alias Employee
-	temp := &struct {
-		*Alias
-	}{
-		Alias: (*Alias)(e),
-	}
-
-	if err := json.Unmarshal(data, &temp); err != nil {
-		return err
-	}
-
-	parsedDay, err := parseDateOnly(e.VacationDays)
-	if err != nil {
-		return err
-	}
-	e.parsedVacations = parsedDay
-
-	return nil
-}
-
-func (e *Employee) Vacations() []time.Time {
-	if len(e.VacationDays) != len(e.parsedVacations) {
-		e.parsedVacations, _ = parseDateOnly(e.VacationDays)
-	}
-	return e.parsedVacations
-}
-
-func parseDateOnly(dateStr []string) ([]time.Time, error) {
-	days := make([]time.Time, len(dateStr))
-	for idx, day := range dateStr {
-		t, err := time.Parse(time.DateOnly, day)
-		if err != nil {
-			return nil, fmt.Errorf("failed to parse date '%s'", day)
-		}
-		days[idx] = t
-	}
-	return days, nil
+type Employee struct {
+	ID           EmployeeID    `json:"id"`
+	Name         string        `json:"name"`
+	VacationDays []VacationDay `json:"vacationDays,omitempty"`
 }