Add UnmarshalYAML function to SerializableDate

go.mod

@@ -9,6 +9,7 @@ require (
 	github.com/sanity-io/litter v1.5.5
 	github.com/spf13/cobra v1.8.0
 	golang.org/x/exp v0.0.0-20240103183307-be819d1f06fc
+	gopkg.in/yaml.v3 v3.0.1
 )
 
 require (

go.sum

@@ -50,5 +50,7 @@ golang.org/x/sys v0.14.0 h1:Vz7Qs629MkJkGyHxUlRHizWJRG2j8fbQKjELVSNhy7Q=
 golang.org/x/sys v0.14.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

pkg/types/date.go

@@ -5,6 +5,8 @@ import (
 	"fmt"
 	"strings"
 	"time"
+
+	"gopkg.in/yaml.v3"
 )
 
 var ErrDateNotJSONString = errors.New("cannot parse non-string value as a date")
@@ -13,12 +15,24 @@ type SerializableDate struct {
 	time.Time
 }
 
-func (date SerializableDate) MarshalJSON() ([]byte, error) {
-	return []byte("\"" + date.Format(time.DateOnly) + "\""), nil
+func (d *SerializableDate) MarshalJSON() ([]byte, error) {
+	return []byte("\"" + d.Format(time.DateOnly) + "\""), nil
+}
+
+func (d *SerializableDate) parse(date string) error {
+	parsedDate, err := time.Parse(time.DateOnly, date)
+	if err != nil {
+		return fmt.Errorf("unable to parse date from JSON: %w", err)
+	}
+
+	d.Time = parsedDate
+
+	return nil
 }
 
-func (date *SerializableDate) UnmarshalJSON(data []byte) error {
+func (d *SerializableDate) UnmarshalJSON(data []byte) error {
 	stringifiedData := string(data)
+
 	if stringifiedData == "null" {
 		return nil
 	}
@@ -29,12 +43,9 @@ func (date *SerializableDate) UnmarshalJSON(data []byte) error {
 
 	dataWithoutQuotes := stringifiedData[1 : len(stringifiedData)-1]
 
-	parsedDate, err := time.Parse(time.DateOnly, dataWithoutQuotes)
-	if err != nil {
-		return fmt.Errorf("unable to parse date from JSON: %w", err)
-	}
-
-	date.Time = parsedDate
+	return d.parse(dataWithoutQuotes)
+}
 
-	return nil
+func (d *SerializableDate) UnmarshalYAML(value *yaml.Node) error {
+	return d.parse(value.Value)
 }