Unleash/unleash-client-go

package constraints

import (
    "github.com/Unleash/unleash-client-go/v3/api"
    "github.com/Unleash/unleash-client-go/v3/context"
    "time"
)

func operatorDateBefore(ctx *context.Context, constraint api.Constraint) (bool, error) {
    return operatorDate(ctx, constraint, func(context time.Time, constraint time.Time) bool {
        return context.Before(constraint)
    })
}

func operatorDateAfter(ctx *context.Context, constraint api.Constraint) (bool, error) {
    return operatorDate(ctx, constraint, func(context time.Time, constraint time.Time) bool {
        return context.After(constraint)
    })
}

func operatorDate(
    ctx *context.Context,
    constraint api.Constraint,
    check func(context time.Time, constraint time.Time) bool,
) (bool, error) {
    contextParsed, contextErr := contextDateValueOrNow(ctx, constraint)
    constraintParsed, constraintErr := time.Parse(time.RFC3339, constraint.Value)

    if contextErr != nil {
        return false, contextErr
    }

    if constraintErr != nil {
        return false, constraintErr
    }

    return check(contextParsed, constraintParsed), nil
}

func contextDateValueOrNow(ctx *context.Context, constraint api.Constraint) (time.Time, error) {
    contextValue := ctx.Field(constraint.ContextName)

    if contextValue != "" {
        return time.Parse(time.RFC3339, contextValue)
    }

    return time.Now(), nil
}