rilltime

type EvalOptions struct {
	Now        time.Time
	MinTime    time.Time
	MaxTime    time.Time
	Watermark  time.Time
	FirstDay   int
	FirstMonth int
	// contains filtered or unexported fields
}

type Expression struct {
	Interval        *Interval      `parser:"@@"`
	AnchorOverrides []*PointInTime `parser:"(As Of @@)*"`
	Grain           *string        `parser:"(By @Grain)?"`
	TimeZone        *string        `parser:"(Tz @Whitespace @TimeZone)?"`
	Offset          *Offset        `parser:"(Offset @@)?"`
	// contains filtered or unexported fields
}

type GrainDuration struct {
	Parts []*GrainDurationPart `parser:"@@ @@*"`
}

type GrainDurationPart struct {
	Num   int    `parser:"@Number"`
	Grain string `parser:"@Grain"`
}

type GrainPointInTime struct {
	Parts []*GrainPointInTimePart `parser:"@@ @@*"`
}

type GrainPointInTimePart struct {
	Prefix   string         `parser:"@Prefix"`
	Duration *GrainDuration `parser:"@@"`
}

type ISOPointInTime struct {
	ISO string `parser:"@ISOTime"`
	// contains filtered or unexported fields
}

type Interval struct {
	Shorthand     *ShorthandInterval     `parser:"( @@"`
	PeriodToGrain *PeriodToGrainInterval `parser:"| @@"`
	StartEnd      *StartEndInterval      `parser:"| @@"`
	Ordinal       *OrdinalInterval       `parser:"| @@"`
	Iso           *IsoInterval           `parser:"| @@)"`
}

type IsoInterval struct {
	Start *ISOPointInTime `parser:"@@"`
	End   *ISOPointInTime `parser:"((To | '/' | RangeSeparator) @@)?"`
}

type LabeledPointInTime struct {
	Ref       bool `parser:"( @Ref"`
	Earliest  bool `parser:"| @Earliest"`
	Now       bool `parser:"| @Now"`
	Latest    bool `parser:"| @Latest"`
	Watermark bool `parser:"| @Watermark)"`
}

type Offset struct {
	PreviousPeriod *PreviousPeriod       `parser:"( @@"`
	Grain          *GrainPointInTimePart `parser:"| @@)"`
}

type Ordinal struct {
	Grain string `parser:"@Grain"`
	Num   int    `parser:"@Number"`
}

type OrdinalInterval struct {
	Ordinals []*Ordinal `parser:"@@ (Of @@)*"`
}

type ParseOptions struct {
	DefaultTimeZone  *time.Location
	TimeZoneOverride *time.Location
	// TODO: the correct way is perhaps add a keyword in syntax to reference smallest grain.
	SmallestGrain timeutil.TimeGrain
}

type PeriodToGrainInterval struct {
	PeriodToGrain string `parser:"@PeriodToGrain"`
}

type PointInTime struct {
	Points []*PointInTimeWithSnap `parser:"@@ @@*"`
}

type PointInTimeWithSnap struct {
	Grain   *GrainPointInTime   `parser:"( @@"`
	Labeled *LabeledPointInTime `parser:"| @@"`
	ISO     *ISOPointInTime     `parser:"| @@)"`

	Snap *string `parser:"(Snap @Grain"`
	// A secondary snap after the above snap. This allows specifying a time range bucketed by week but snapped by a higher order grain.
	// EG: `Y/Y/W` or `Y/Y/W + 1Y` snaps to the beginning of the 1st week of the year or the beginning of the 1st week of next year (to include the last week of the year)
	//     `Y/Y` or `Y/Y + 1Y` instead gives 1st day of the year or 1st day of next year.
	SecondarySnap *string `parser:"(Snap @Grain)?)?"`
}

type PreviousPeriod struct {
	Prefix string `parser:"@Prefix"`
	Num    int    `parser:"@Number PreviousPeriod"`
}

type ShorthandInterval struct {
	Parts []*GrainDurationPart `parser:"@@ @@*"`
}

type StartEndInterval struct {
	Start *PointInTime `parser:"@@"`
	End   *PointInTime `parser:"To @@"`
}