105 lines
2.4 KiB
Go
105 lines
2.4 KiB
Go
package types
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import (
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"database/sql/driver"
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"encoding/json"
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"time"
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"github.com/spf13/cast"
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)
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// DefaultDateLayout specifies the default app date strings layout.
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const DefaultDateLayout = "2006-01-02 15:04:05.000Z"
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// NowDateTime returns new DateTime instance with the current local time.
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func NowDateTime() DateTime {
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return DateTime{t: time.Now()}
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}
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// ParseDateTime creates a new DateTime from the provided value
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// (could be [cast.ToTime] supported string, [time.Time], etc.).
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func ParseDateTime(value any) (DateTime, error) {
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d := DateTime{}
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err := d.Scan(value)
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return d, err
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}
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// DateTime represents a [time.Time] instance in UTC that is wrapped
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// and serialized using the app default date layout.
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type DateTime struct {
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t time.Time
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}
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// Time returns the internal [time.Time] instance.
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func (d DateTime) Time() time.Time {
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return d.t
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}
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// IsZero checks whether the current DateTime instance has zero time value.
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func (d DateTime) IsZero() bool {
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return d.Time().IsZero()
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}
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// String serializes the current DateTime instance into a formatted
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// UTC date string.
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//
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// The zero value is serialized to an empty string.
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func (d DateTime) String() string {
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if d.IsZero() {
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return ""
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}
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return d.Time().UTC().Format(DefaultDateLayout)
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}
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// MarshalJSON implements the [json.Marshaler] interface.
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func (d DateTime) MarshalJSON() ([]byte, error) {
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return []byte(`"` + d.String() + `"`), nil
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}
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// UnmarshalJSON implements the [json.Unmarshaler] interface.
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func (d *DateTime) UnmarshalJSON(b []byte) error {
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var raw string
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if err := json.Unmarshal(b, &raw); err != nil {
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return err
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}
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return d.Scan(raw)
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}
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// Value implements the [driver.Valuer] interface.
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func (d DateTime) Value() (driver.Value, error) {
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return d.String(), nil
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}
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// Scan implements [sql.Scanner] interface to scan the provided value
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// into the current DateTime instance.
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func (d *DateTime) Scan(value any) error {
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switch v := value.(type) {
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case DateTime:
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d.t = v.Time()
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case time.Time:
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d.t = v
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case int, int64, int32, uint, uint64, uint32:
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d.t = cast.ToTime(v)
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case string:
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if v == "" {
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d.t = time.Time{}
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} else {
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t, err := time.Parse(DefaultDateLayout, v)
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if err != nil {
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// check for other common date layouts
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t = cast.ToTime(v)
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}
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d.t = t
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}
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default:
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str := cast.ToString(v)
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if str == "" {
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d.t = time.Time{}
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} else {
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d.t = cast.ToTime(str)
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}
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}
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return nil
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}
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