Files

108 lines
2.5 KiB
Go

package preset
import (
"slices"
"strings"
"aego/asset"
"aego/asset/pipeline"
"aego/core/errs"
"aego/core/ids"
"aego/core/log"
"aego/format/aetext"
)
const (
Ext = ".aepreset"
scriptHead = "engine.Script"
)
type Importer struct{}
func New() *Importer {
return &Importer{}
}
func (*Importer) ID() string { return "preset" }
func (*Importer) Version() int { return 1 }
func (*Importer) Extensions() []string { return []string{Ext} }
func (*Importer) Defaults() pipeline.Settings { return pipeline.Settings{} }
func Type(doc *aetext.Node) (string, bool, bool) {
for _, n := range doc.Blocks {
if n.Head != "node" {
continue
}
for _, c := range n.Blocks {
if c.Head != "component" {
continue
}
if c.Label != scriptHead {
return c.Label, false, true
}
for _, s := range c.Blocks {
if s.Head == "script" {
return s.Label, true, true
}
}
}
return "", false, false
}
return "", false, false
}
func (*Importer) Import(ctx *pipeline.ImportContext) (*pipeline.Result, error) {
doc, err := aetext.Parse(ctx.Source, ctx.Path)
if err != nil {
return nil, errs.Wrap(err, errs.AssetImportFailed, "cannot parse the preset")
}
if doc.Head != "prefab" {
return nil, errs.New(errs.AssetImportFailed, "unexpected preset root", log.F("path", ctx.Path), log.F("head", doc.Head))
}
if _, _, ok := Type(doc); !ok {
return nil, errs.New(errs.AssetImportFailed, "the preset holds no component", log.F("path", ctx.Path))
}
deps := map[ids.AssetID]bool{}
collect(doc, deps)
delete(deps, ctx.ID)
list := make([]ids.AssetID, 0, len(deps))
for id := range deps {
list = append(list, id)
}
slices.SortFunc(list, func(a, b ids.AssetID) int { return strings.Compare(a.String(), b.String()) })
return &pipeline.Result{
Kind: asset.ArtPreset,
Deps: list,
Artifacts: []pipeline.Produced{{Kind: asset.ArtPreset, Data: aetext.Write(doc)}},
}, nil
}
func collect(n *aetext.Node, out map[ids.AssetID]bool) {
for _, f := range n.Attrs {
value(f.Value, out)
}
for _, f := range n.Fields {
value(f.Value, out)
}
for _, b := range n.Blocks {
collect(b, out)
}
}
func value(v aetext.Value, out map[ids.AssetID]bool) {
switch v.Kind {
case aetext.VAsset:
if id, err := ids.ParseAssetID(v.Str); err == nil && !id.IsZero() {
out[id] = true
}
case aetext.VList:
for _, item := range v.List {
value(item, out)
}
case aetext.VStruct:
for _, f := range v.Obj {
value(f.Value, out)
}
}
}