package models

// PageInfo carries pagination state for templates.
type PageInfo struct {
	CurrentPage  int
	TotalPages   int
	PostsPerPage int
}

// HasPrevious returns true if there is a previous page.
func (p PageInfo) HasPrevious() bool {
	return p.CurrentPage > 1
}

// HasNext returns true if there is a next page.
func (p PageInfo) HasNext() bool {
	return p.CurrentPage < p.TotalPages
}

// PreviousPage returns the previous page number.
func (p PageInfo) PreviousPage() int {
	return p.CurrentPage - 1
}

// NextPage returns the next page number.
func (p PageInfo) NextPage() int {
	return p.CurrentPage + 1
}

// Pages returns a slice of page numbers for rendering numbered pagination.
func (p PageInfo) Pages() []int {
	pages := make([]int, p.TotalPages)
	for i := range pages {
		pages[i] = i + 1
	}
	return pages
}