forked from vikunja/vikunja
konrad
d56a611be7
Fix lint Add docs for keyvalue config options Use keyvalue store to cache unsplash photo results Cleanup Use keyvalue store for upload avatar Use keyvalue store for initials avatar Fix initializing metrics Use keyvalue for metrics Add IncryBy and DecrBy methods to increase or decrease a value Fix lint Return custom error if a key does not exist Init keyvalue storage Follow the keyvalue storage setting for things like cache and other Add docs Add configuration of the storage backend Add redis keyvalue storage implementation Add doc comments Add methods to use storage through the package itself Add memory implementation for keyvalue store Co-authored-by: kolaente <k@knt.li> Reviewed-on: vikunja/api#674 Co-Authored-By: konrad <konrad@kola-entertainments.de> Co-Committed-By: konrad <konrad@kola-entertainments.de>
105 lines
3.0 KiB
Go
105 lines
3.0 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/modules/keyvalue"
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e "code.vikunja.io/api/pkg/modules/keyvalue/error"
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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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"strconv"
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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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cacheKey := "avatar_upload_" + strconv.Itoa(int(u.ID))
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ai, err := keyvalue.Get(cacheKey)
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if err != nil && !e.IsErrValueNotFoundForKey(err) {
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return nil, "", err
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}
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var cached map[int64][]byte
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if ai != nil {
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cached = ai.(map[int64][]byte)
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}
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if err != nil && e.IsErrValueNotFoundForKey(err) {
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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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cached = make(map[int64][]byte)
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} else {
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a := ai.(map[int64][]byte)
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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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cached = make(map[int64][]byte)
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}
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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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if err != nil {
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return nil, "", err
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}
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cached[size] = avatar
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err = keyvalue.Put(cacheKey, cached)
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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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if err := keyvalue.Del("avatar_upload_" + strconv.Itoa(int(u.ID))); err != nil {
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log.Errorf("Could not invalidate upload avatar cache for user %d, error was %s", u.ID, err)
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}
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}
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