mirror of
https://github.com/go-vikunja/vikunja.git
synced 2026-04-24 22:25:15 +00:00
fb7764d9f1
Email notifications now display user mentions with inline avatar images for improved visual recognition and easier identification. Mentions gracefully fall back to display names if avatars are unavailable.
99 lines
2.9 KiB
Go
99 lines
2.9 KiB
Go
// Vikunja is a to-do list application to facilitate your life.
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// Copyright 2018-present Vikunja and contributors. All rights reserved.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package initials
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import (
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"encoding/base64"
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"fmt"
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"html"
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"strconv"
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"strings"
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"code.vikunja.io/api/pkg/user"
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)
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// Provider represents the provider implementation of the initials provider
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type Provider struct {
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}
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// FlushCache is a no-op for the initials provider since SVG generation is lightweight
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func (p *Provider) FlushCache(_ *user.User) error { return nil }
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var avatarBgColors = []string{
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"#e0f8d9",
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"#e3f5f8",
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"#faeefb",
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"#f1efff",
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"#ffecf0",
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"#ffefe4",
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}
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var avatarTextColors = []string{
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"#005f00",
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"#00548c",
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"#822198",
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"#5d26cd",
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"#9f0850",
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"#9b2200",
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}
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// GetAvatar returns an initials avatar for a user as SVG
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func (p *Provider) GetAvatar(u *user.User, size int64) (avatar []byte, mimeType string, err error) {
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// Get the text to display
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avatarText := u.Name
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if avatarText == "" {
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avatarText = u.Username
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}
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if avatarText == "" {
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return nil, "", fmt.Errorf("user has no name or username")
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}
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// Get the first character and convert to uppercase
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firstRune := []rune(strings.ToUpper(avatarText))[0]
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initial := html.EscapeString(string(firstRune))
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// Select background and text colors based on user ID
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colorIndex := int(u.ID) % len(avatarBgColors)
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bgColor := avatarBgColors[colorIndex]
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textColor := avatarTextColors[colorIndex]
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// Convert size to string
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sizeStr := strconv.FormatInt(size, 10)
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// Generate SVG
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svg := fmt.Sprintf(`<svg viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg" width="%s" height="%s">
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<rect width="100" height="100" fill="%s"/>
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<text x="50" y="50" font-family="sans-serif" font-size="50" fill="%s" text-anchor="middle" dominant-baseline="central">%s</text>
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</svg>`, sizeStr, sizeStr, bgColor, textColor, initial)
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return []byte(svg), "image/svg+xml", nil
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}
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// AsDataURI returns a data URI for the SVG avatar
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func (p *Provider) AsDataURI(u *user.User, size int64) (string, error) {
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avatarData, mimeType, err := p.GetAvatar(u, size)
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if err != nil {
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return "", err
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}
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// Encode the SVG as base64 and create a data URI
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base64Data := base64.StdEncoding.EncodeToString(avatarData)
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dataURI := fmt.Sprintf("data:%s;base64,%s", mimeType, base64Data)
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return dataURI, nil
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}
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