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images.go
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/
images.go
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package handlers
import (
"bytes"
"fmt"
"image/png"
"io/ioutil"
"net/http"
"strings"
"github.com/getfider/fider/app/pkg/img"
"github.com/getfider/fider/app/pkg/log"
"github.com/getfider/fider/app/pkg/md5"
"github.com/getfider/fider/app/pkg/web"
"github.com/goenning/letteravatar"
)
//Avatar returns a gravatar picture of fallsback to letter avatar based on name
func Avatar() web.HandlerFunc {
return func(c web.Context) error {
name := c.Param("name")
size, _ := c.ParamAsInt("size")
id, err := c.ParamAsInt("id")
if err == nil && id > 0 {
user, err := c.Services().Users.GetByID(id)
if err == nil && user.Tenant.ID == c.Tenant().ID {
if user.Email != "" {
url := fmt.Sprintf("https://www.gravatar.com/avatar/%s?s=%d&d=404", md5.Hash(user.Email), size)
c.Logger().Debugf("Requesting gravatar: @{GravatarURL}", log.Props{
"GravatarURL": url,
})
resp, err := http.Get(url)
if err == nil {
defer resp.Body.Close()
if resp.StatusCode == http.StatusOK {
bytes, err := ioutil.ReadAll(resp.Body)
if err == nil {
return c.Blob(http.StatusOK, http.DetectContentType(bytes), bytes)
}
}
}
}
}
}
img, err := letteravatar.Draw(size, strings.ToUpper(letteravatar.Extract(name)), &letteravatar.Options{
PaletteKey: fmt.Sprintf("%d:%s", id, name),
})
if err != nil {
return c.Failure(err)
}
buf := new(bytes.Buffer)
err = png.Encode(buf, img)
if err != nil {
return c.Failure(err)
}
return c.Blob(http.StatusOK, "image/png", buf.Bytes())
}
}
//Logo returns tenant logo by its ID on a given size
func Logo() web.HandlerFunc {
return func(c web.Context) error {
id, err := c.ParamAsInt("id")
if err != nil {
return c.Failure(err)
}
size, err := c.ParamAsInt("size")
if err != nil {
return c.Failure(err)
}
logo, err := c.Services().Tenants.GetLogo(id)
if err != nil {
return c.Failure(err)
}
bytes, err := img.Resize(logo.Content, size)
if err != nil {
return c.Failure(err)
}
return c.Blob(http.StatusOK, logo.ContentType, bytes)
}
}