134 lines
3.3 KiB
Go
134 lines
3.3 KiB
Go
package entity
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import (
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"strings"
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"time"
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"github.com/gosimple/slug"
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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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"github.com/photoprism/photoprism/pkg/rnd"
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"github.com/photoprism/photoprism/pkg/txt"
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)
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// Label is used for photo, album and location categorization
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type Label struct {
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ID uint `gorm:"primary_key"`
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LabelUUID string `gorm:"type:varbinary(36);unique_index;"`
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LabelSlug string `gorm:"type:varbinary(128);unique_index;"`
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CustomSlug string `gorm:"type:varbinary(128);index;"`
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LabelName string `gorm:"type:varchar(128);"`
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LabelPriority int
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LabelFavorite bool
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LabelDescription string `gorm:"type:text;"`
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LabelNotes string `gorm:"type:text;"`
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LabelCategories []*Label `gorm:"many2many:categories;association_jointable_foreignkey:category_id"`
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Links []Link `gorm:"foreignkey:ShareUUID;association_foreignkey:LabelUUID"`
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CreatedAt time.Time
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UpdatedAt time.Time
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DeletedAt *time.Time `sql:"index"`
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New bool `gorm:"-"`
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}
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// BeforeCreate computes a random UUID when a new label is created in database
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func (m *Label) BeforeCreate(scope *gorm.Scope) error {
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if err := scope.SetColumn("LabelUUID", rnd.PPID('l')); err != nil {
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log.Errorf("label: %s", err)
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return err
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}
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return nil
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}
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// NewLabel creates a label in database with a given name and priority
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func NewLabel(labelName string, labelPriority int) *Label {
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labelName = strings.TrimSpace(labelName)
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if labelName == "" {
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labelName = "Unknown"
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}
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labelSlug := slug.Make(labelName)
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labelName = txt.Title(txt.Clip(labelName, 128))
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result := &Label{
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LabelSlug: labelSlug,
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CustomSlug: labelSlug,
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LabelName: labelName,
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LabelPriority: labelPriority,
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}
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return result
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}
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// FirstOrCreate checks if the label already exists in the database
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func (m *Label) FirstOrCreate(db *gorm.DB) *Label {
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mutex.Db.Lock()
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defer mutex.Db.Unlock()
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if err := db.FirstOrCreate(m, "label_slug = ? OR custom_slug = ?", m.LabelSlug, m.CustomSlug).Error; err != nil {
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log.Errorf("label: %s", err)
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}
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return m
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}
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// AfterCreate sets the New column used for database callback
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func (m *Label) AfterCreate(scope *gorm.Scope) error {
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return scope.SetColumn("New", true)
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}
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// Rename an existing label
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func (m *Label) Rename(name string) {
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name = strings.TrimSpace(name)
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if name == "" {
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return
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}
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name = txt.Title(txt.Clip(name, 128))
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m.LabelName = name
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m.CustomSlug = slug.Make(name)
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}
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// Updates a label if necessary
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func (m *Label) Update(label classify.Label, db *gorm.DB) error {
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save := false
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if m.LabelPriority != label.Priority {
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m.LabelPriority = label.Priority
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save = true
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}
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if m.CustomSlug == "" {
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m.CustomSlug = m.LabelSlug
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save = true
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} else if m.LabelSlug == "" {
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m.LabelSlug = m.CustomSlug
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save = true
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}
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if m.CustomSlug == m.LabelSlug && label.Title() != m.LabelName {
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m.Rename(label.Title())
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save = true
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}
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if save {
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if err := db.Save(m).Error; err != nil {
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return err
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}
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}
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// Add categories
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for _, category := range label.Categories {
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sn := NewLabel(txt.Title(category), -3).FirstOrCreate(db)
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if err := db.Model(m).Association("LabelCategories").Append(sn).Error; err != nil {
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return err
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}
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}
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return nil
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}
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