usecases

Documentation

Overview

Package usecases is the bridge between the domain and the interfaces

Index

• type HashDecoder
• type ImageDescription
• type ImageFetcher
• type ImageResizer
• type Logger
• type ThumbnailInteractor
  • func (ti *ThumbnailInteractor) Add(hash string) (image.Image, error)
  • func (ti *ThumbnailInteractor) Get(hash string) (image.Image, error)

Types

type HashDecoder

type HashDecoder interface {
	Decode(string) (ImageDescription, error)
}

HashDecoder decodes a hash to an ImageDescription

type ImageDescription

type ImageDescription struct {
	Path   string
	Width  int
	Height int
}

ImageDescription describes an image extracted from the hash

type ImageFetcher

type ImageFetcher interface {
	Fetch(path string) (image.Image, error)
}

ImageFetcher fetches an image from the given url.URL

type ImageResizer

type ImageResizer interface {
	Resize(image image.Image, w, h int) (image.Image, error)
}

ImageResizer resizes an image based on w and h

type Logger

type Logger interface {
	Log(format string, args ...interface{})
}

Logger abstracts away the loggin

type ThumbnailInteractor

type ThumbnailInteractor struct {
	ThumbnailRepository domain.ThumbnailRepository
	ImageResizer        ImageResizer
	ImageFetcher        ImageFetcher
	HashDecoder         HashDecoder
	Logger              Logger
}

ThumbnailInteractor contains all players involved in creating thumbnails

func (*ThumbnailInteractor) Add

func (ti *ThumbnailInteractor) Add(hash string) (image.Image, error)

Add adds a new thumbnail based on the hash to the thumbnail repository

func (*ThumbnailInteractor) Get

func (ti *ThumbnailInteractor) Get(hash string) (image.Image, error)

Get returns an thumbnail image generated from the given hash, error otherwise