78 lines
1.8 KiB
Go
78 lines
1.8 KiB
Go
package manifest
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import (
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"errors"
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"sort"
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"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
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)
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// Event is a description of a single event.
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type Event struct {
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Name string `json:"name"`
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Parameters []Parameter `json:"parameters"`
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}
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// IsValid checks Event consistency and correctness.
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func (e *Event) IsValid() error {
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if e.Name == "" {
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return errors.New("empty or absent name")
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}
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if len(e.Parameters) > 1 {
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paramNames := make([]string, len(e.Parameters))
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for i := range e.Parameters {
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paramNames[i] = e.Parameters[i].Name
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}
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sort.Strings(paramNames)
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for i := range paramNames {
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if i == 0 {
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continue
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}
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if paramNames[i] == paramNames[i-1] {
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return errors.New("duplicate parameter name")
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}
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}
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}
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return nil
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}
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// ToStackItem converts Event to stackitem.Item.
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func (e *Event) ToStackItem() stackitem.Item {
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params := make([]stackitem.Item, len(e.Parameters))
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for i := range e.Parameters {
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params[i] = e.Parameters[i].ToStackItem()
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}
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return stackitem.NewStruct([]stackitem.Item{
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stackitem.Make(e.Name),
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stackitem.Make(params),
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})
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}
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// FromStackItem converts stackitem.Item to Event.
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func (e *Event) FromStackItem(item stackitem.Item) error {
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var err error
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if item.Type() != stackitem.StructT {
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return errors.New("invalid Event stackitem type")
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}
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event := item.Value().([]stackitem.Item)
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if len(event) != 2 {
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return errors.New("invalid Event stackitem length")
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}
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e.Name, err = stackitem.ToString(event[0])
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if err != nil {
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return err
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}
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if event[1].Type() != stackitem.ArrayT {
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return errors.New("invalid Params stackitem type")
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}
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params := event[1].Value().([]stackitem.Item)
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e.Parameters = make([]Parameter, len(params))
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for i := range params {
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p := new(Parameter)
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if err := p.FromStackItem(params[i]); err != nil {
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return err
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}
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e.Parameters[i] = *p
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}
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return nil
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}
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