Jakub Zych
ee474401cb
- AvatarURL returns the avatar thumbnail, the file path when the thumbnail fails, or the gravatar URL, the rule of the user payload - applyAvatar takes avatar_url from it; the payload is unchanged
66 lines
2.0 KiB
Go
66 lines
2.0 KiB
Go
package classes
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import (
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"context"
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"crypto/md5"
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"errors"
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"fmt"
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"log/slog"
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"strconv"
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"strings"
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"git.golem15.com/golem15/sm-user-plugin/models"
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"git.golem15.com/golem15/summercms/modules/backpack"
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"git.golem15.com/golem15/summercms/modules/lagoon/attach"
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"gocloud.dev/blob"
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"gorm.io/gorm"
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)
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// AvatarURL returns the display picture URL of user at size pixels, the
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// rule the user API payload follows: the thumbnail (size by size, mode
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// auto) of the user's avatar attachment when there is one and a file
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// bucket is published, the attachment's file path when the thumbnail
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// fails (logged), and otherwise the gravatar URL
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// //www.gravatar.com/avatar/{md5 of the email}?s={size}&d=mm. The URL may
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// be protocol-relative or relative; a caller that needs an absolute URL
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// resolves it. Only a failing database lookup is an error.
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func AvatarURL(ctx context.Context, app *backpack.App, user *models.User, size int) (string, error) {
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if user == nil {
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return "", errors.New("golem15.user: avatar needs a user")
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}
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fallback := gravatar(user.Email, size)
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if app == nil || user.ID == 0 {
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return fallback, nil
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}
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gdb, ok := app.Lookup[*gorm.DB]()
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if !ok || gdb == nil {
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return fallback, nil
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}
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var f attach.File
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err := gdb.WithContext(ctx).
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Where("attachment_type = ? AND attachment_id = ? AND field = ?", user.MorphName(), strconv.FormatUint(uint64(user.ID), 10), models.AvatarField).
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Take(&f).Error
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if errors.Is(err, gorm.ErrRecordNotFound) {
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return fallback, nil
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}
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if err != nil {
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return "", err
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}
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bucket, ok := app.Lookup[*blob.Bucket]()
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if !ok || bucket == nil {
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return fallback, nil
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}
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url, err := f.Thumb(ctx, bucket, size, size, "auto")
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if err != nil {
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slog.Default().Error("golem15.user: avatar thumb", "err", err)
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return "/" + attach.BlobKey(f.DiskName), nil
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}
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return url, nil
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}
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// gravatar is the gravatar URL of an email at size pixels.
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func gravatar(email string, size int) string {
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sum := md5.Sum([]byte(strings.ToLower(strings.TrimSpace(email))))
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return fmt.Sprintf("//www.gravatar.com/avatar/%x?s=%d&d=mm", sum, size)
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}
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