82 lines
1.7 KiB
Go
82 lines
1.7 KiB
Go
package activitystreams
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// ItemCollection represents an array of items
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type ItemCollection []Item
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// Item struct
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type Item ObjectOrLink
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// GetID returns the ObjectID corresponding to ItemCollection
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func (i ItemCollection) GetID() *ObjectID {
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return nil
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}
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// GetLink returns the empty IRI
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func (i ItemCollection) GetLink() IRI {
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return IRI("")
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}
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// GetType returns the ItemCollection's type
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func (i ItemCollection) GetType() ActivityVocabularyType {
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return CollectionOfItems
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}
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// IsLink returns false for an ItemCollection object
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func (i ItemCollection) IsLink() bool {
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return false
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}
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// IsObject returns true for a ItemCollection object
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func (i ItemCollection) IsObject() bool {
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return false
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}
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// Append facilitates adding elements to Item arrays
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// and ensures ItemCollection implements the Collection interface
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func (i *ItemCollection) Append(o Item) error {
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oldLen := len(*i)
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d := make(ItemCollection, oldLen+1)
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for k, it := range *i {
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d[k] = it
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}
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d[oldLen] = o
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*i = d
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return nil
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}
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// Count returns the length of Items in the item collection
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func (i *ItemCollection) Count() uint {
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return uint(len(*i))
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}
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// First returns the ObjectID corresponding to ItemCollection
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func (i ItemCollection) First() Item {
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if len(i) == 0 {
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return nil
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}
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return i[0]
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}
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// Collection returns the current object as collection interface
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func (i *ItemCollection) Collection() ItemCollection {
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return *i
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}
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// IsCollection returns true for ItemCollection arrays
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func (i ItemCollection) IsCollection() bool {
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return true
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}
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// Contains verifies if IRIs array contains the received one
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func (i ItemCollection) Contains(r IRI) bool {
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if len(i) == 0 {
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return false
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}
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for _, iri := range i {
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if r.Equals(iri.GetLink(), false) {
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return true
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}
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}
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return false
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}
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