119 lines
2.5 KiB
Go
119 lines
2.5 KiB
Go
package activitypub
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// Item struct
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type Item = ObjectOrLink
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const (
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EmptyIRI IRI = ""
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NilIRI IRI = "-"
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EmptyID = EmptyIRI
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NilID = NilIRI
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)
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// ItemsEqual checks if it and with Items are equal
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func ItemsEqual(it, with Item) bool {
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if IsNil(it) || IsNil(with) {
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return with == it
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}
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result := false
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if it.IsCollection() {
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if it.GetType() == CollectionOfItems {
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OnItemCollection(it, func(c *ItemCollection) error {
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result = c.Equals(with)
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return nil
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})
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}
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if it.GetType() == CollectionType {
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OnCollection(it, func(c *Collection) error {
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result = c.Equals(with)
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return nil
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})
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}
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if it.GetType() == OrderedCollectionType {
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OnOrderedCollection(it, func(c *OrderedCollection) error {
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result = c.Equals(with)
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return nil
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})
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}
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if it.GetType() == CollectionPageType {
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OnCollectionPage(it, func(c *CollectionPage) error {
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result = c.Equals(with)
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return nil
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})
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}
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if it.GetType() == OrderedCollectionPageType {
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OnOrderedCollectionPage(it, func(c *OrderedCollectionPage) error {
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result = c.Equals(with)
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return nil
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})
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}
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}
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if it.IsObject() {
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if ActivityTypes.Contains(with.GetType()) {
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OnActivity(it, func(i *Activity) error {
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result = i.Equals(with)
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return nil
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})
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} else if ActorTypes.Contains(with.GetType()) {
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OnActor(it, func(i *Actor) error {
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result = i.Equals(with)
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return nil
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})
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} else {
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OnObject(it, func(i *Object) error {
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result = i.Equals(with)
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return nil
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})
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}
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}
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if with.IsLink() {
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result = with.GetLink().Equals(it.GetLink(), false)
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}
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return result
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}
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// IsItemCollection returns if the current Item interface holds a Collection
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func IsItemCollection(it Item) bool {
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_, ok := it.(ItemCollection)
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_, okP := it.(*ItemCollection)
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return ok || okP
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}
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// IsIRI returns if the current Item interface holds an IRI
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func IsIRI(it Item) bool {
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_, ok := it.(IRI)
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return ok
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}
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// IsObject returns if the current Item interface holds an IRI
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func IsObject(it Item) bool {
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ok := it.IsObject()
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if it.IsLink() {
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_, ok = it.(IRI)
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return !ok
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}
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return ok
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}
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// IsNil checks if the object matching an ObjectOrLink interface is nil
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func IsNil(it Item) bool {
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if it == nil {
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return true
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}
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// This is the default if the argument can't be casted to Object, as is the case for an ItemCollection
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isNil := false
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if IsItemCollection(it) {
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OnItemCollection(it, func(c *ItemCollection) error {
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isNil = c == nil
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return nil
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})
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} else {
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OnObject(it, func(o *Object) error {
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isNil = o == nil
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return nil
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})
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}
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return isNil
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}
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