vikunja-api/pkg/modules/avatar/marble/marble.go

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// Vikunja is a to-do list application to facilitate your life.
// Copyright 2018-2021 Vikunja and contributors. All rights reserved.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public Licensee as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public Licensee for more details.
//
// You should have received a copy of the GNU Affero General Public Licensee
// along with this program. If not, see <https://www.gnu.org/licenses/>.
package marble
import (
"math"
"strconv"
"code.vikunja.io/api/pkg/user"
)
// Provider generates a random avatar based on https://github.com/boringdesigners/boring-avatars
type Provider struct {
}
const avatarSize = 80
var colors = []string{
"#A3A948",
"#EDB92E",
"#F85931",
"#CE1836",
"#009989",
}
type props struct {
Color string
TranslateX int
TranslateY int
Rotate int
Scale float64
}
func getUnit(number int, rang, index int) int {
value := number % rang
digit := math.Floor(math.Mod(float64(number)/math.Pow(10, float64(index)), 10))
if index > 0 && (math.Mod(digit, 2) == 0) {
return -value
}
return value
}
func getPropsForUser(u *user.User) []*props {
ps := []*props{}
for i := 0; i < 3; i++ {
f := float64(getUnit(int(u.ID)*(i+1), avatarSize/10, 0))
ps = append(ps, &props{
Color: colors[(int(u.ID)+i)%(len(colors)-1)],
TranslateX: getUnit(int(u.ID)*(i+1), avatarSize/10, 1),
TranslateY: getUnit(int(u.ID)*(i+1), avatarSize/10, 2),
Scale: 1.2 + f/10,
Rotate: getUnit(int(u.ID)*(i+1), 360, 1),
})
}
return ps
}
func (p *Provider) GetAvatar(u *user.User, size int64) (avatar []byte, mimeType string, err error) {
s := strconv.FormatInt(size, 10)
avatarSizeStr := strconv.Itoa(avatarSize)
avatarSizeHalf := strconv.Itoa(avatarSize / 2)
ps := getPropsForUser(u)
return []byte(`<svg
viewBox="0 0 ` + avatarSizeStr + ` ` + avatarSizeStr + `"
fill="none"
xmlns="http://www.w3.org/2000/svg"
width="` + s + `"
height="` + s + `"
>
<mask id="mask__marble" maskUnits="userSpaceOnUse" x="0" y="0" width="` + avatarSizeStr + `" height="` + avatarSizeStr + `">
<rect width="` + avatarSizeStr + `" height="` + avatarSizeStr + `" rx="` + strconv.Itoa(avatarSize*2) + `" fill="white" />
</mask>
<g mask="url(#mask__marble)">
<rect width="` + avatarSizeStr + `" height="` + avatarSizeStr + `" rx="2" fill="` + ps[0].Color + `" />
<path
filter="url(#prefix__filter0_f)"
d="M32.414 59.35L50.376 70.5H72.5v-71H33.728L26.5 13.381l19.057 27.08L32.414 59.35z"
fill="` + ps[1].Color + `"
transform="translate(` + strconv.Itoa(ps[1].TranslateX) + ` ` + strconv.Itoa(ps[1].TranslateY) + `) rotate(` + strconv.Itoa(ps[1].Rotate) + ` ` + avatarSizeHalf + ` ` + avatarSizeHalf + `) scale(` + strconv.FormatFloat(ps[2].Scale, 'f', 2, 64) + `)"
/>
<path
filter="url(#prefix__filter0_f)"
style="mix-blend-mode: overlay;"
d="M22.216 24L0 46.75l14.108 38.129L78 86l-3.081-59.276-22.378 4.005 12.972 20.186-23.35 27.395L22.215 24z"
fill="` + ps[2].Color + `"
transform="translate(` + strconv.Itoa(ps[2].TranslateX) + ` ` + strconv.Itoa(ps[2].TranslateY) + `) rotate(` + strconv.Itoa(ps[2].Rotate) + ` ` + avatarSizeHalf + ` ` + avatarSizeHalf + `) scale(` + strconv.FormatFloat(ps[2].Scale, 'f', 2, 64) + `)"
/>
</g>
<defs>
<filter
id="prefix__filter0_f"
filterUnits="userSpaceOnUse"
colorInterpolationFilters="sRGB"
>
<feFlood flood-opacity="0" result="BackgroundImageFix" />
<feBlend in="SourceGraphic" in2="BackgroundImageFix" result="shape" />
<feGaussianBlur stdDeviation="7" result="effect1_foregroundBlur" />
</filter>
</defs>
</svg>`), "image/svg+xml", nil
}