123 lines
3.3 KiB
Go
123 lines
3.3 KiB
Go
package entity
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import (
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"crypto/sha1"
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"encoding/base32"
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"encoding/json"
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"sync"
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"time"
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)
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var faceMutex = sync.Mutex{}
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// Faces represents a Face slice.
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type Faces []Face
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// Face represents the face of a Subject.
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type Face struct {
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ID string `gorm:"type:VARBINARY(42);primary_key;auto_increment:false;" json:"ID" yaml:"ID"`
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FaceSrc string `gorm:"type:VARBINARY(8);" json:"Src" yaml:"Src,omitempty"`
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SubjectUID string `gorm:"type:VARBINARY(42);index;" json:"SubjectUID" yaml:"SubjectUID,omitempty"`
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Collisions int `json:"Collisions" yaml:"Collisions,omitempty"`
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Samples int `json:"Samples" yaml:"Samples,omitempty"`
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Radius float64 `json:"Radius" yaml:"Radius,omitempty"`
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EmbeddingJSON json.RawMessage `gorm:"type:MEDIUMBLOB;" json:"-" yaml:"EmbeddingJSON,omitempty"`
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CreatedAt time.Time `json:"CreatedAt" yaml:"CreatedAt,omitempty"`
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UpdatedAt time.Time `json:"UpdatedAt" yaml:"UpdatedAt,omitempty"`
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embedding Embedding `gorm:"-"`
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}
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// UnknownFace can be used as a placeholder for unknown faces.
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var UnknownFace = Face{
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ID: "zz",
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FaceSrc: SrcDefault,
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SubjectUID: UnknownPerson.SubjectUID,
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EmbeddingJSON: []byte{},
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}
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// CreateUnknownFace initializes the database with a placeholder for unknown faces.
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func CreateUnknownFace() {
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_ = UnknownFace.Create()
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}
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// TableName returns the entity database table name.
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func (Face) TableName() string {
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return "faces_dev3"
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}
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// NewFace returns a new face.
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func NewFace(subjectUID string, embeddings Embeddings) *Face {
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result := &Face{
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SubjectUID: subjectUID,
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}
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if err := result.SetEmbeddings(embeddings); err != nil {
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log.Errorf("face: failed setting embeddings (%s)", err)
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}
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return result
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}
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// SetEmbeddings assigns face embeddings.
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func (m *Face) SetEmbeddings(embeddings Embeddings) (err error) {
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m.embedding, m.Radius, m.Samples = EmbeddingsMidpoint(embeddings)
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m.EmbeddingJSON, err = json.Marshal(m.embedding)
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if err != nil {
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return err
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}
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s := sha1.Sum(m.EmbeddingJSON)
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m.ID = base32.StdEncoding.EncodeToString(s[:])
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m.UpdatedAt = Timestamp()
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if m.CreatedAt.IsZero() {
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m.CreatedAt = m.UpdatedAt
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}
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return nil
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}
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// Embedding returns parsed face embedding.
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func (m *Face) Embedding() Embedding {
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if len(m.EmbeddingJSON) == 0 {
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return Embedding{}
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} else if len(m.embedding) > 0 {
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return m.embedding
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} else if err := json.Unmarshal(m.EmbeddingJSON, &m.embedding); err != nil {
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log.Errorf("failed parsing face embedding json: %s", err)
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}
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return m.embedding
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}
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// Save updates the existing or inserts a new face.
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func (m *Face) Save() error {
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faceMutex.Lock()
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defer faceMutex.Unlock()
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return Save(m, "ID")
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}
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// Create inserts the face to the database.
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func (m *Face) Create() error {
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faceMutex.Lock()
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defer faceMutex.Unlock()
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return Db().Create(m).Error
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}
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// Delete removes the face from the database.
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func (m *Face) Delete() error {
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return Db().Delete(m).Error
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}
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// Update a face property in the database.
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func (m *Face) Update(attr string, value interface{}) error {
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return UnscopedDb().Model(m).Update(attr, value).Error
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}
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// Updates face properties in the database.
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func (m *Face) Updates(values interface{}) error {
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return UnscopedDb().Model(m).Updates(values).Error
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}
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