diff -r e77dad242f4c -r 2a9ec03fe5a1 vendor/github.com/McKael/madon/v2/media.go
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/github.com/McKael/madon/v2/media.go	Sat Sep 29 18:09:54 2018 +0200
@@ -0,0 +1,108 @@
+/*
+Copyright 2017-2018 Mikael Berthe
+
+Licensed under the MIT license.  Please see the LICENSE file is this directory.
+*/
+
+package madon
+
+import (
+	"bytes"
+	"encoding/json"
+	"io"
+	"mime/multipart"
+	"os"
+	"path/filepath"
+	"strconv"
+
+	"github.com/pkg/errors"
+	"github.com/sendgrid/rest"
+)
+
+// UploadMedia uploads the given file and returns an attachment
+// The description and focus arguments can be empty strings.
+// 'focus' is the "focal point", written as two comma-delimited floating points.
+func (mc *Client) UploadMedia(filePath, description, focus string) (*Attachment, error) {
+	var b bytes.Buffer
+
+	if filePath == "" {
+		return nil, ErrInvalidParameter
+	}
+
+	f, err := os.Open(filePath)
+	if err != nil {
+		return nil, errors.Wrap(err, "cannot read file")
+	}
+	defer f.Close()
+
+	w := multipart.NewWriter(&b)
+	formWriter, err := w.CreateFormFile("file", filepath.Base(filePath))
+	if err != nil {
+		return nil, errors.Wrap(err, "media upload")
+	}
+	if _, err = io.Copy(formWriter, f); err != nil {
+		return nil, errors.Wrap(err, "media upload")
+	}
+
+	w.Close()
+
+	var params apiCallParams
+	if description != "" || focus != "" {
+		params = make(apiCallParams)
+		if description != "" {
+			params["description"] = description
+		}
+		if focus != "" {
+			params["focus"] = focus
+		}
+	}
+
+	req, err := mc.prepareRequest("media", rest.Post, params)
+	if err != nil {
+		return nil, errors.Wrap(err, "media prepareRequest failed")
+	}
+	req.Headers["Content-Type"] = w.FormDataContentType()
+	req.Body = b.Bytes()
+
+	// Make API call
+	r, err := restAPI(req)
+	if err != nil {
+		return nil, errors.Wrap(err, "media upload failed")
+	}
+
+	// Check for error reply
+	var errorResult Error
+	if err := json.Unmarshal([]byte(r.Body), &errorResult); err == nil {
+		// The empty object is not an error
+		if errorResult.Text != "" {
+			return nil, errors.New(errorResult.Text)
+		}
+	}
+
+	// Not an error reply; let's unmarshal the data
+	var attachment Attachment
+	err = json.Unmarshal([]byte(r.Body), &attachment)
+	if err != nil {
+		return nil, errors.Wrap(err, "cannot decode API response (media)")
+	}
+	return &attachment, nil
+}
+
+// UpdateMedia updates the description and focal point of a media
+// One of the description and focus arguments can be nil to not be updated.
+func (mc *Client) UpdateMedia(mediaID int64, description, focus *string) (*Attachment, error) {
+	params := make(apiCallParams)
+	if description != nil {
+		params["description"] = *description
+	}
+	if focus != nil {
+		params["focus"] = *focus
+	}
+
+	endPoint := "media/" + strconv.FormatInt(mediaID, 10)
+	var attachment Attachment
+	if err := mc.apiCall("v1/"+endPoint, rest.Put, params, nil, nil, &attachment); err != nil {
+		return nil, err
+	}
+	return &attachment, nil
+}