77 lines
2.0 KiB
Go
77 lines
2.0 KiB
Go
package entity
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import (
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"github.com/jinzhu/gorm"
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"github.com/photoprism/photoprism/internal/classify"
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"github.com/photoprism/photoprism/internal/mutex"
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)
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// PhotoLabel represents the many-to-many relation between Photo and label.
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// Labels are weighted by uncertainty (100 - confidence)
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type PhotoLabel struct {
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PhotoID uint `gorm:"primary_key;auto_increment:false"`
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LabelID uint `gorm:"primary_key;auto_increment:false;index"`
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LabelSrc string `gorm:"type:varbinary(8);"`
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Uncertainty int `gorm:"type:SMALLINT"`
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Photo *Photo `gorm:"PRELOAD:false"`
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Label *Label `gorm:"PRELOAD:true"`
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}
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// TableName returns PhotoLabel table identifier "photos_labels"
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func (PhotoLabel) TableName() string {
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return "photos_labels"
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}
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// NewPhotoLabel registers a new PhotoLabel relation with an uncertainty and a source of label
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func NewPhotoLabel(photoID, labelID uint, uncertainty int, source string) *PhotoLabel {
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result := &PhotoLabel{
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PhotoID: photoID,
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LabelID: labelID,
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Uncertainty: uncertainty,
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LabelSrc: source,
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}
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return result
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}
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// FirstOrCreate checks if the PhotoLabel relation already exist in the database before the creation
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func (m *PhotoLabel) FirstOrCreate(db *gorm.DB) *PhotoLabel {
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mutex.Db.Lock()
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defer mutex.Db.Unlock()
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if err := db.FirstOrCreate(m, "photo_id = ? AND label_id = ?", m.PhotoID, m.LabelID).Error; err != nil {
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log.Errorf("photo label: %s", err)
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}
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return m
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}
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// ClassifyLabel returns the label as classify.Label
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func (m *PhotoLabel) ClassifyLabel() classify.Label {
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if m.Label == nil {
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panic("photo label: label is nil")
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}
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result := classify.Label{
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Name: m.Label.LabelName,
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Source: m.LabelSrc,
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Uncertainty: m.Uncertainty,
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Priority: m.Label.LabelPriority,
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}
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return result
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}
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// Save saves the entity in the database and returns an error.
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func (m *PhotoLabel) Save(db *gorm.DB) error {
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if m.Photo != nil {
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m.Photo = nil
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}
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if m.Label != nil {
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m.Label.Rename(m.Label.LabelName)
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}
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return db.Save(m).Error
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}
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