103 lines
2.8 KiB
Go
103 lines
2.8 KiB
Go
package entity
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import (
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"github.com/photoprism/photoprism/internal/classify"
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)
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type PhotoLabels []PhotoLabel
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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 the entity table name.
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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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// Updates multiple columns in the database.
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func (m *PhotoLabel) Updates(values interface{}) error {
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return UnscopedDb().Model(m).UpdateColumns(values).Error
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}
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// Update a column in the database.
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func (m *PhotoLabel) Update(attr string, value interface{}) error {
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return UnscopedDb().Model(m).UpdateColumn(attr, value).Error
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}
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// Save updates the record in the database or inserts a new record if it does not already exist.
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func (m *PhotoLabel) Save() 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.SetName(m.Label.LabelName)
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}
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return Db().Save(m).Error
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}
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// Create inserts a new row to the database.
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func (m *PhotoLabel) Create() error {
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return Db().Create(m).Error
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}
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// Delete deletes the label reference.
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func (m *PhotoLabel) Delete() error {
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return Db().Delete(m).Error
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}
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// FirstOrCreatePhotoLabel returns the existing row, inserts a new row or nil in case of errors.
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func FirstOrCreatePhotoLabel(m *PhotoLabel) *PhotoLabel {
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result := PhotoLabel{}
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if err := Db().Where("photo_id = ? AND label_id = ?", m.PhotoID, m.LabelID).First(&result).Error; err == nil {
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return &result
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} else if createErr := m.Create(); createErr == nil {
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return m
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} else if err := Db().Where("photo_id = ? AND label_id = ?", m.PhotoID, m.LabelID).First(&result).Error; err == nil {
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return &result
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} else {
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log.Errorf("photo-label: %s (find or create)", createErr)
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}
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return nil
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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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log.Errorf("photo-label: classify label is nil (photo id %d, label id %d) - possible bug", m.PhotoID, m.LabelID)
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return classify.Label{}
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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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