db

type Article struct {
	gorm.Model

	Title   string `json:"title"`
	Remote  string `json:"remote"`
	Content []byte

	ParentRefer uint
	Children    []Article `json:"children" gorm:"foreignKey:ParentRefer"`
}

type Artifact interface {
	FetchContent(bool) error
	Exists(*gorm.DB) bool
	Write(*gorm.DB) error
	Read(*gorm.DB) error
}

type DB struct {
	Refer       *gorm.DB
	RootArticle *Article
	Exercises   []Exercise
	Sessions    []Session
}

type Exercise struct {
	gorm.Model

	Content          string `json:"content"`
	ChecksWithScript bool   `json:"checks_with_script"`
	Expects          string `json:"expects"`

	ParentArticleRefer uint
	ParentArticle      Article `gorm:"foreignKey:ParentArticleRefer"`
}

type ExerciseRoot struct {
	ArticleTitle string     `json:"article_title"`
	Exercises    []Exercise `json:"exercises"`
}

type Session struct {
	gorm.Model

	Username string

	ArticleID uint
	Article   Article

	ExerciseID uint
	Exercise   Exercise
}