preview

Documentation

Overview

Package preview implements business logic.

Index

• type Preview
  • func NewPreview(prevImpl preview.Previewer, encImpl encode.Hasher, cacheImpl cache.Cacher, ...) (*Preview, error)
  • func (p Preview) AddItemIntoCache(item entities.CacheItem) (bool, error)
  • func (p Preview) CalcHash(url string) (string, error)
  • func (p Preview) Close() error
  • func (p Preview) IsItemInCache(hash string) (entities.CacheItem, bool, error)
  • func (p Preview) Preview(width, height int, img image.Image, opts entities.ResizeOptions) image.Image

Types

type Preview

type Preview struct {
	Previewer       preview.Previewer
	ImageURLEncoder encode.Hasher
	Cacher          cache.Cacher
	Storager        storage.Storager
}

Preview is the main Preview struct.

func NewPreview

func NewPreview(prevImpl preview.Previewer, encImpl encode.Hasher, cacheImpl cache.Cacher, storImpl storage.Storager,
) (*Preview, error)

NewPreview inits main Preview fields.

func (Preview) AddItemIntoCache

func (p Preview) AddItemIntoCache(item entities.CacheItem) (bool, error)

AddItemIntoCache adds image into cache.

func (Preview) CalcHash

func (p Preview) CalcHash(url string) (string, error)

CalcHash calculates hash for url.

func (Preview) Close

func (p Preview) Close() error

Close closes any open handlers.

func (Preview) IsItemInCache

func (p Preview) IsItemInCache(hash string) (entities.CacheItem, bool, error)

IsItemInCache returns image if it in the cache.

func (Preview) Preview

func (p Preview) Preview(width, height int, img image.Image, opts entities.ResizeOptions) image.Image

Preview returns preview result image.