photoprism/internal/entity/lens.go

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package entity
import (
"strings"
"sync"
"time"
"github.com/gosimple/slug"
"github.com/photoprism/photoprism/internal/event"
"github.com/photoprism/photoprism/pkg/txt"
)
var lensMutex = sync.Mutex{}
// Lens represents camera lens (as extracted from UpdateExif metadata)
type Lens struct {
ID uint `gorm:"primary_key" json:"ID" yaml:"ID"`
LensSlug string `gorm:"type:VARBINARY(255);unique_index;" json:"Slug" yaml:"Slug,omitempty"`
LensName string `gorm:"type:VARCHAR(255);" json:"Name" yaml:"Name"`
LensMake string `gorm:"type:VARCHAR(255);" json:"Make" yaml:"Make,omitempty"`
LensModel string `gorm:"type:VARCHAR(255);" json:"Model" yaml:"Model,omitempty"`
LensType string `gorm:"type:VARCHAR(255);" json:"Type" yaml:"Type,omitempty"`
LensDescription string `gorm:"type:TEXT;" json:"Description,omitempty" yaml:"Description,omitempty"`
LensNotes string `gorm:"type:TEXT;" json:"Notes,omitempty" yaml:"Notes,omitempty"`
CreatedAt time.Time `json:"-" yaml:"-"`
UpdatedAt time.Time `json:"-" yaml:"-"`
DeletedAt *time.Time `sql:"index" json:"-" yaml:"-"`
}
var UnknownLens = Lens{
LensSlug: "zz",
LensName: "Unknown",
LensMake: "",
LensModel: "Unknown",
}
// CreateUnknownLens initializes the database with an unknown lens if not exists
func CreateUnknownLens() {
FirstOrCreateLens(&UnknownLens)
}
// TableName returns Lens table identifier "lens"
func (Lens) TableName() string {
return "lenses"
}
// NewLens creates a new lens in database
func NewLens(modelName string, makeName string) *Lens {
modelName = txt.Clip(modelName, txt.ClipDefault)
makeName = txt.Clip(makeName, txt.ClipDefault)
if modelName == "" && makeName == "" {
return &UnknownLens
} else if strings.HasPrefix(modelName, makeName) {
modelName = strings.TrimSpace(modelName[len(makeName):])
}
if n, ok := CameraMakes[makeName]; ok {
makeName = n
}
var name []string
if makeName != "" {
name = append(name, makeName)
}
if modelName != "" {
name = append(name, modelName)
}
lensName := strings.Join(name, " ")
lensSlug := slug.Make(txt.Clip(lensName, txt.ClipSlug))
result := &Lens{
LensSlug: lensSlug,
LensName: lensName,
LensMake: makeName,
LensModel: modelName,
}
return result
}
// Create inserts a new row to the database.
func (m *Lens) Create() error {
lensMutex.Lock()
defer lensMutex.Unlock()
return Db().Create(m).Error
}
// FirstOrCreateLens returns the existing row, inserts a new row or nil in case of errors.
func FirstOrCreateLens(m *Lens) *Lens {
if m.LensSlug == "" {
return &UnknownLens
}
if cacheData, ok := lensCache.Get(m.LensSlug); ok {
log.Debugf("lens: cache hit for %s", m.LensSlug)
return cacheData.(*Lens)
}
result := Lens{}
if res := Db().Where("lens_slug = ?", m.LensSlug).First(&result); res.Error == nil {
lensCache.SetDefault(m.LensSlug, &result)
return &result
} else if err := m.Create(); err == nil {
if !m.Unknown() {
event.EntitiesCreated("lenses", []*Lens{m})
event.Publish("count.lenses", event.Data{
"count": 1,
})
}
lensCache.SetDefault(m.LensSlug, m)
return m
} else if res := Db().Where("lens_slug = ?", m.LensSlug).First(&result); res.Error == nil {
lensCache.SetDefault(m.LensSlug, &result)
return &result
} else {
log.Errorf("lens: %s (create %s)", err.Error(), txt.Quote(m.String()))
}
return &UnknownLens
}
// String returns an identifier that can be used in logs.
func (m *Lens) String() string {
return m.LensName
}
// Unknown returns true if the lens is not a known make or model.
func (m *Lens) Unknown() bool {
return m.LensSlug == "" || m.LensSlug == UnknownLens.LensSlug
}