Golang Functional Constructor

constructor.go

package main

// for more information please look at:
// https://dave.cheney.net/2014/10/17/functional-options-for-friendly-apis
// https://www.reddit.com/r/golang/comments/6mtbx9/useful_constructors_in_go/

// OutputComponent struct
type OutputComponent struct {
	Title        string  `json:"title,omitempty"`
	Icon         string  `json:"icon,omitempty"`
	SubTitle     string  `json:"subTitle,omitempty"`
	Type         string  `json:"type,omitempty"`
	ResourceType string  `json:"resource_type,omitempty"`
	Action       *Action `json:"action,omitempty"`
	ActionTitle  string  `json:"actionTitle,omitempty"`
}

// OutputComponentOptionFunc function
type OutputComponentOptionFunc func(*OutputComponent) error

// NewOutputComponent return new output comment
func NewOutputComponent(options ...OutputComponentOptionFunc) (*OutputComponent, error) {
	o := &OutputComponent{}
	for _, option := range options {
		if err := option(o); err != nil {
			return o, err
		}
	}

	return o, nil
}

// OutputComponentSetTitle set title of struct
func OutputComponentSetTitle(title string) OutputComponentOptionFunc {
	return func(o *OutputComponent) error {
		o.Title = title
		return nil
	}
}

// OutputComponentSetSubTitle set subtitle of struct
func OutputComponentSetSubTitle(title string) OutputComponentOptionFunc {
	return func(o *OutputComponent) error {
		o.SubTitle = title
		return nil
	}
}

// OutputComponentSetIcon set icon of struct
func OutputComponentSetIcon(icon string) OutputComponentOptionFunc {
	return func(o *OutputComponent) error {
		o.Icon = icon
		return nil
	}
}

// OutputComponentSetActionTitle set actionTitle of struct
func OutputComponentSetActionTitle(title string) OutputComponentOptionFunc {
	return func(o *OutputComponent) error {
		o.ActionTitle = title
		return nil
	}
}

// OutputComponentSetAction set action of struct
func OutputComponentSetAction(action *Action) OutputComponentOptionFunc {
	return func(o *OutputComponent) error {
		if action.Type != "" {
			o.Action = action
		}
		return nil
	}
}

// OutputComponentSetResourceType set resource type of struct
func OutputComponentSetResourceType(t string) OutputComponentOptionFunc {
	return func(o *OutputComponent) error {
		o.ResourceType = t
		return nil
	}
}

// OutputComponentSetType set  type of struct
func OutputComponentSetType(t string) OutputComponentOptionFunc {
	return func(o *OutputComponent) error {
		o.Type = t
		return nil
	}
}