forked from vikunja/vikunja
konrad
dfb7730b63
Don't fail if the last avatar file does not exist when deleting it Fix lint Remove old global avatar setting and update docs Generate docs Invalidate the avatar cache when uploading a new one Add debug logs Add caching for upload avatars Add cache locks Fix encoding Resize the uploaded image to a max of 1024 pixels Remove the old uploaded avatar if one already exists Add mimetype check for images Set avatar provider to upload when uploading an avatar Add upload avatar provider Make font size smaller to let the initials still look good in smaller sizes Add debug log Add cache and resizing of initials avatars Make font size depend on avatar size Add drawing initials avatar Add initials provider Make the initials avatar provider the default Add routes Add user avatar settings handler methods Add user avatar provider field Co-authored-by: kolaente <k@knt.li> Reviewed-on: vikunja/api#622
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 2018-2020 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 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 General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package upload
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import (
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"bytes"
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"code.vikunja.io/api/pkg/files"
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"code.vikunja.io/api/pkg/log"
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"code.vikunja.io/api/pkg/user"
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"github.com/disintegration/imaging"
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"image"
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"image/png"
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"io/ioutil"
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"sync"
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)
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var (
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// This is a map with a map so we're able to clear all cached avatar (in all sizes) for one user at once
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// The first map has as key the user id, the second one has the size as key
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resizedCache = map[int64]map[int64][]byte{}
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resizedCacheLock = sync.Mutex{}
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)
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func init() {
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resizedCache = make(map[int64]map[int64][]byte)
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}
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// Provider represents the upload avatar provider
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type Provider struct {
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}
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// GetAvatar returns an uploaded user avatar
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func (p *Provider) GetAvatar(u *user.User, size int64) (avatar []byte, mimeType string, err error) {
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a, cached := resizedCache[u.ID]
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if cached {
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if a != nil && a[size] != nil {
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log.Debugf("Serving uploaded avatar for user %d and size %d from cache.", u.ID, size)
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return a[size], "", nil
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}
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// This means we have a map for the user, but nothing in it.
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if a == nil {
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resizedCache[u.ID] = make(map[int64][]byte)
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}
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} else {
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// Nothing ever cached for this user so we need to create the size map to avoid panics
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resizedCache[u.ID] = make(map[int64][]byte)
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}
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log.Debugf("Uploaded avatar for user %d and size %d not cached, resizing and caching.", u.ID, size)
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// If we get this far, the avatar is either not cached at all or not in this size
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f := &files.File{ID: u.AvatarFileID}
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if err := f.LoadFileByID(); err != nil {
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return nil, "", err
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}
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if err := f.LoadFileMetaByID(); err != nil {
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return nil, "", err
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}
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img, _, err := image.Decode(f.File)
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if err != nil {
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return nil, "", err
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}
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resizedImg := imaging.Resize(img, 0, int(size), imaging.Lanczos)
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buf := &bytes.Buffer{}
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if err := png.Encode(buf, resizedImg); err != nil {
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return nil, "", err
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}
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avatar, err = ioutil.ReadAll(buf)
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resizedCacheLock.Lock()
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resizedCache[u.ID][size] = avatar
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resizedCacheLock.Unlock()
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return avatar, f.Mime, err
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}
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// InvalidateCache invalidates the avatar cache for a user
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func InvalidateCache(u *user.User) {
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resizedCacheLock.Lock()
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delete(resizedCache, u.ID)
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resizedCacheLock.Unlock()
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}
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