linker

Documentation

Index

• type LinkGuard
• type LinkMapper
• type LinkRepository
• type LinkShortener
  • func Make(guard LinkGuard, mapper LinkMapper, repo LinkRepository) *LinkShortener
  • func (repo *LinkShortener) Allowed(link *url.URL) bool
  • func (repo *LinkShortener) Expand(id string) (*url.URL, error)
  • func (repo *LinkShortener) Shorten(link *url.URL) (string, error)

Types

type LinkGuard

type LinkGuard interface {
	Allowed(url *url.URL) bool
}

A LinkGuard determines if a URL is allowed to be shortened

type LinkMapper

type LinkMapper interface {
	Map(link *url.URL) (string, error)
}

LinkMapper generates IDs from URLs

type LinkRepository

type LinkRepository interface {
	Get(id string) (*url.URL, error)
	Set(id string, url *url.URL) error
}

A LinkRepository persists ID <=> URL pairs

type LinkShortener

type LinkShortener struct {
	// contains filtered or unexported fields
}

A LinkShortener turns fully-qualified URLS into shorter IDs, and back again

func Make

func Make(guard LinkGuard, mapper LinkMapper, repo LinkRepository) *LinkShortener

Make a default shortener with passed implementations

func (*LinkShortener) Allowed

func (repo *LinkShortener) Allowed(link *url.URL) bool

Allowed returns true if the link is allowed to be shortened

func (*LinkShortener) Expand

func (repo *LinkShortener) Expand(id string) (*url.URL, error)

Expand a shorter ID to a long URL

func (*LinkShortener) Shorten

func (repo *LinkShortener) Shorten(link *url.URL) (string, error)

Shorten a long URL to a shorter ID