first commit

engine/engine_case.go

@@ -0,0 +1,19 @@
+package engine
+
+import (
+	"git.fsdpf.net/go/contracts"
+	"git.fsdpf.net/go/db"
+)
+
+type EngineCase[T any] struct {
+	predicate contracts.Condition
+	cb        func(data T, g contracts.GlobalParams) error
+}
+
+func (this EngineCase[T]) ToSql(param contracts.ModelParam) db.Expression {
+	return this.predicate.ToSql(param)
+}
+
+func (this EngineCase[T]) Execute(data T, g contracts.GlobalParams) error {
+	return this.cb(data, g)
+}