slideshare

type Converter ¶

type Converter interface {
	Reset()
	AddImage(r io.Reader, name string) error
	Save(w io.Writer) error
}

Converter is the interface that wraps image conversion methods.

Reset resets the internal state of the parser. It may be empty based on the implementation.

AddImage append new image to the pdf. It returns any error encountered that caused save to fail.

Save writes pdf content to an io.Writer. It returns any error encountered that caused save to fail.

type Downloader ¶

type Downloader interface {
	Fetch(w io.Writer, url string) error
}

Downloader is the interface that wraps the basic Download method.

Download downloads html of slideshare page and writes it to a given writer. It returns any error encountered that caused download or write to fail.

type PDFDownloader ¶

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

PDFDownloader manages the process of pdf creation. It uses downloader to download slideshare pages html and slide images parser to extract images urls from slideshare pages and converter to convert images into a pdf.

func NewSlideshareDownloader(downloader Downloader, parser Parser, converter Converter) *PDFDownloader

func (pd *PDFDownloader) Download(url string, quality Quality, w io.Writer) error

type Parser ¶

type Parser interface {
	Images(r io.Reader, q Quality) ([]string, error)
}

Parser is the interface that wraps the basic Images method.

Images extracts image urls from the given html. It returns a slice of strings and any error encountered that caused the parser to fail.

type Quality ¶

type Quality int

Quality represents image quality

const (
	// QualityFull best quality.
	QualityFull Quality = iota + 1

	// QualityNormal normal quality.
	QualityNormal

	// QualitySmall worst quality.
	QualitySmall
)