refac: debt on role backend

internal/infrastructure/useCases/contentCaller.go

@@ -0,0 +1,34 @@
+package useCases
+
+import (
+	"RenewCMS/internal/domain/article"
+	"RenewCMS/internal/domain/builtintype"
+	"RenewCMS/internal/domain/role"
+)
+
+type ContentCaller struct {
+	UserID uint32
+	Grants role.GrantSet
+}
+
+func (c ContentCaller) requireHolding(key string, typeKey string) error {
+	if !c.Grants.HoldsFor(key, typeKey) {
+		return role.MissingPermissionError{Key: key}
+	}
+	return nil
+}
+
+func (c ContentCaller) authorize(key string, typeKey string, createdBy uint32) error {
+	if !c.Grants.Permits(key, typeKey, c.UserID, createdBy) {
+		return role.MissingPermissionError{Key: key}
+	}
+	return nil
+}
+
+func (c ContentCaller) reads(typeKey string, createdBy uint32) bool {
+	return c.Grants.Permits(role.KeyContentRead, typeKey, c.UserID, createdBy)
+}
+
+func (c ContentCaller) seesArticle(art article.Article) bool {
+	return art.IsOnline || c.reads(builtintype.KeyArticle, art.CreatedBy)
+}