vendor tsgo

tools/tsgo/internal/packagejson/exportsorimports.go

@@ -0,0 +1,84 @@
+package packagejson
+
+import (
+	"github.com/microsoft/typescript-go/internal/collections"
+	"github.com/microsoft/typescript-go/internal/json"
+)
+
+type objectKind int8
+
+const (
+	objectKindUnknown objectKind = iota
+	objectKindSubpaths
+	objectKindConditions
+	objectKindImports
+	objectKindInvalid
+)
+
+type ExportsOrImports struct {
+	JSONValue
+	objectKind objectKind
+}
+
+var _ json.UnmarshalerFrom = (*ExportsOrImports)(nil)
+
+func (e *ExportsOrImports) UnmarshalJSONFrom(dec *json.Decoder) error {
+	return unmarshalJSONValueV2[ExportsOrImports](&e.JSONValue, dec)
+}
+
+func (e ExportsOrImports) AsObject() *collections.OrderedMap[string, ExportsOrImports] {
+	if e.Type != JSONValueTypeObject {
+		panic("expected object")
+	}
+	return e.Value.(*collections.OrderedMap[string, ExportsOrImports])
+}
+
+func (e ExportsOrImports) AsArray() []ExportsOrImports {
+	if e.Type != JSONValueTypeArray {
+		panic("expected array")
+	}
+	return e.Value.([]ExportsOrImports)
+}
+
+func (e ExportsOrImports) IsSubpaths() bool {
+	e.initObjectKind()
+	return e.objectKind == objectKindSubpaths
+}
+
+func (e ExportsOrImports) IsImports() bool {
+	e.initObjectKind()
+	return e.objectKind == objectKindImports
+}
+
+func (e ExportsOrImports) IsConditions() bool {
+	e.initObjectKind()
+	return e.objectKind == objectKindConditions
+}
+
+func (e *ExportsOrImports) initObjectKind() {
+	if e.objectKind == objectKindUnknown && e.Type == JSONValueTypeObject {
+		if obj := e.AsObject(); obj.Size() > 0 {
+			seenDot, seenHash, seenOther := false, false, false
+			for k := range obj.Keys() {
+				if len(k) > 0 {
+					seenDot = seenDot || k[0] == '.'
+					seenHash = seenHash || k[0] == '#'
+					seenOther = seenOther || (k[0] != '.' && k[0] != '#')
+					if seenOther && (seenDot || seenHash) {
+						e.objectKind = objectKindInvalid
+						return
+					}
+				}
+			}
+			if seenDot {
+				e.objectKind = objectKindSubpaths
+				return
+			}
+			if seenHash {
+				e.objectKind = objectKindImports
+				return
+			}
+		}
+		e.objectKind = objectKindConditions
+	}
+}