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idx.go
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idx.go
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package reflidx
import (
"reflect"
"github.com/adamcolton/luce/ds/lmap"
"github.com/adamcolton/luce/ds/slice"
"github.com/adamcolton/luce/lerr"
"github.com/adamcolton/luce/serial"
"github.com/adamcolton/luce/serial/rye"
"github.com/adamcolton/luce/store"
"github.com/adamcolton/luce/store/entity"
"github.com/adamcolton/luce/util/reflector"
)
type Namer interface {
Name() string
}
// TODO: Move this to serial
type Rounder interface {
serial.Serializer
serial.Deserializer
}
type Round struct {
serial.Serializer
serial.Deserializer
}
var (
EntsBucket = []byte("ents")
IndexesBucket = []byte("idxs")
// TODO: unexpose, make an object, add registers
Funcs lmap.Map[string, any]
)
type EntStore[E entity.Entity] struct {
*entity.EntStore[E]
}
func (es EntStore[E]) AddMethod(name string, multi bool) {
t := reflector.Type[E]()
m, found := t.MethodByName(name)
// Todo: lerr.panic on false
if !found {
panic("method not found")
}
fn := m.Func.Interface().(func(E) []byte)
es.AddIndex(name, multi, fn)
}
func New[E entity.Entity](r Rounder, f store.Factory) EntStore[E] {
t := reflector.Type[E]()
// TODO: something better
name := []byte(t.Name())
init := func() E {
return reflector.Make(t).Interface().(E)
}
str := lerr.Must(f.Store(EntsBucket))
str = lerr.Must(str.Store(name))
es := &entity.EntStore[E]{
Init: init,
Store: str,
Serializer: r,
Deserializer: r,
}
addIndexes[E](es, t, name, f)
return EntStore[E]{es}
}
func addIndexes[E entity.Entity](es *entity.EntStore[E], t reflect.Type, name []byte, f store.Factory) {
var idxs slice.Slice[entity.BaseIndexer[E]]
isPtr := t.Kind() == reflect.Pointer
if isPtr {
t = t.Elem()
}
fields := t.NumField()
for i := 0; i < fields; i++ {
f := t.Field(i)
if _, ok := f.Tag.Lookup("entityIndexSingle"); ok {
idxs = append(idxs, makeFieldIdx[E](f.Name, f.Index, isPtr))
}
}
if len(idxs) == 0 {
return
}
idx := lerr.Must(f.Store(IndexesBucket))
es.IdxStore = lerr.Must(idx.Store(name))
for _, i := range idxs {
es.AddIndexer(i)
}
}
func makeFieldIdx[E entity.Entity](fname string, fidx []int, isPtr bool) entity.BaseIndexer[E] {
var fn func(E) []byte
if isPtr {
fn = func(e E) []byte {
v := reflect.ValueOf(e).Elem().FieldByIndex(fidx)
return rye.Serialize.Any(v.Interface(), nil)
}
} else {
fn = func(e E) []byte {
v := reflect.ValueOf(e).FieldByIndex(fidx)
return rye.Serialize.Any(v.Interface(), nil)
}
}
return entity.BaseIndexer[E]{
IndexName: fname,
Fn: fn,
}
}