wechaty/go-wechaty

package factory

import (
    "errors"
    "github.com/otiai10/opengraph"
    "github.com/wechaty/go-wechaty/wechaty-puppet/schemas"
    _interface "github.com/wechaty/go-wechaty/wechaty/interface"
    "github.com/wechaty/go-wechaty/wechaty/user"
)

var (
    ErrImageUrlOrDescNotFound = errors.New("imgUrl.or.desc.not.found")
)

type UrlLinkFactory struct{}

func (u *UrlLinkFactory) Create(url string) (_interface.IUrlLink, error) {
    var og, err = opengraph.Fetch(url)
    if err != nil {
        return nil, err
    }
    var payload = &schemas.UrlLinkPayload{
        Url:         url,
        Title:       og.Title,
        Description: og.Description,
    }

    if len(og.Image) != 0 {
        payload.ThumbnailUrl = og.Image[0].URL
    }

    if payload.ThumbnailUrl == "" || payload.Description == "" {
        return nil, ErrImageUrlOrDescNotFound
    }

    return user.NewUrlLink(payload), nil
}