2019-12-03 16:23:59 +00:00
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package activitypub
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2017-09-11 20:45:57 +00:00
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2018-07-24 21:11:08 +00:00
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import (
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2022-01-12 17:57:45 +00:00
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"bytes"
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"encoding/gob"
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2022-05-25 11:36:56 +00:00
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"fmt"
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2022-05-25 11:46:03 +00:00
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"io"
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2020-07-16 19:54:46 +00:00
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"reflect"
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2019-12-03 15:05:39 +00:00
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"time"
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2019-12-04 18:33:15 +00:00
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"unsafe"
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2021-08-15 11:41:01 +00:00
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"github.com/valyala/fastjson"
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2018-07-24 21:11:08 +00:00
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)
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2018-06-09 12:05:46 +00:00
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2019-12-01 18:27:45 +00:00
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const CollectionOfItems ActivityVocabularyType = "ItemCollection"
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2019-05-16 09:08:27 +00:00
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var CollectionTypes = ActivityVocabularyTypes{
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CollectionOfItems,
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CollectionType,
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OrderedCollectionType,
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CollectionPageType,
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OrderedCollectionPageType,
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}
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2021-11-07 13:39:30 +00:00
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type Collections interface {
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Collection | CollectionPage | OrderedCollection | OrderedCollectionPage | ItemCollection
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}
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2018-04-09 11:10:27 +00:00
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type CollectionInterface interface {
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ObjectOrLink
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Collection() ItemCollection
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Append(ob Item) error
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Count() uint
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Contains(Item) bool
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}
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2018-07-18 15:39:27 +00:00
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// Collection is a subtype of Activity Pub Object that represents ordered or unordered sets of Activity Pub Object or Link instances.
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type Collection struct {
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// ID provides the globally unique identifier for anActivity Pub Object or Link.
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ID ID `jsonld:"id,omitempty"`
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// Type identifies the Activity Pub Object or Link type. Multiple values may be specified.
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Type ActivityVocabularyType `jsonld:"type,omitempty"`
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// Name a simple, human-readable, plain-text name for the object.
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// HTML markup MUST NOT be included. The name MAY be expressed using multiple language-tagged values.
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Name NaturalLanguageValues `jsonld:"name,omitempty,collapsible"`
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// Attachment identifies a resource attached or related to an object that potentially requires special handling.
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// The intent is to provide a model that is at least semantically similar to attachments in email.
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Attachment Item `jsonld:"attachment,omitempty"`
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// AttributedTo identifies one or more entities to which this object is attributed. The attributed entities might not be Actors.
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// For instance, an object might be attributed to the completion of another activity.
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AttributedTo Item `jsonld:"attributedTo,omitempty"`
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// Audience identifies one or more entities that represent the total population of entities
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// for which the object can considered to be relevant.
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Audience ItemCollection `jsonld:"audience,omitempty"`
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// Content or textual representation of the Activity Pub Object encoded as a JSON string.
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// By default, the value of content is HTML.
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// The mediaType property can be used in the object to indicate a different content type.
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// (The content MAY be expressed using multiple language-tagged values.)
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Content NaturalLanguageValues `jsonld:"content,omitempty,collapsible"`
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// Context identifies the context within which the object exists or an activity was performed.
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// The notion of "context" used is intentionally vague.
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// The intended function is to serve as a means of grouping objects and activities that share a
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// common originating context or purpose. An example could be all activities relating to a common project or event.
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Context Item `jsonld:"context,omitempty"`
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// MediaType when used on an Object, identifies the MIME media type of the value of the content property.
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// If not specified, the content property is assumed to contain text/html content.
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MediaType MimeType `jsonld:"mediaType,omitempty"`
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// EndTime the date and time describing the actual or expected ending time of the object.
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// When used with an Activity object, for instance, the endTime property specifies the moment
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// the activity concluded or is expected to conclude.
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EndTime time.Time `jsonld:"endTime,omitempty"`
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// Generator identifies the entity (e.g. an application) that generated the object.
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Generator Item `jsonld:"generator,omitempty"`
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// Icon indicates an entity that describes an icon for this object.
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// The image should have an aspect ratio of one (horizontal) to one (vertical)
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// and should be suitable for presentation at a small size.
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Icon Item `jsonld:"icon,omitempty"`
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// Image indicates an entity that describes an image for this object.
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// Unlike the icon property, there are no aspect ratio or display size limitations assumed.
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Image Item `jsonld:"image,omitempty"`
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// InReplyTo indicates one or more entities for which this object is considered a response.
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InReplyTo Item `jsonld:"inReplyTo,omitempty"`
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// Location indicates one or more physical or logical locations associated with the object.
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Location Item `jsonld:"location,omitempty"`
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// Preview identifies an entity that provides a preview of this object.
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Preview Item `jsonld:"preview,omitempty"`
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// Published the date and time at which the object was published
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Published time.Time `jsonld:"published,omitempty"`
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// Replies identifies a Collection containing objects considered to be responses to this object.
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Replies Item `jsonld:"replies,omitempty"`
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// StartTime the date and time describing the actual or expected starting time of the object.
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// When used with an Activity object, for instance, the startTime property specifies
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// the moment the activity began or is scheduled to begin.
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StartTime time.Time `jsonld:"startTime,omitempty"`
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// Summary a natural language summarization of the object encoded as HTML.
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// *Multiple language tagged summaries may be provided.)
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Summary NaturalLanguageValues `jsonld:"summary,omitempty,collapsible"`
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// Tag one or more "tags" that have been associated with an objects. A tag can be any kind of Activity Pub Object.
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// The key difference between attachment and tag is that the former implies association by inclusion,
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// while the latter implies associated by reference.
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Tag ItemCollection `jsonld:"tag,omitempty"`
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// Updated the date and time at which the object was updated
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Updated time.Time `jsonld:"updated,omitempty"`
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// URL identifies one or more links to representations of the object
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URL Item `jsonld:"url,omitempty"`
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// To identifies an entity considered to be part of the public primary audience of an Activity Pub Object
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To ItemCollection `jsonld:"to,omitempty"`
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// Bto identifies anActivity Pub Object that is part of the private primary audience of this Activity Pub Object.
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Bto ItemCollection `jsonld:"bto,omitempty"`
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// CC identifies anActivity Pub Object that is part of the public secondary audience of this Activity Pub Object.
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CC ItemCollection `jsonld:"cc,omitempty"`
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// BCC identifies one or more Objects that are part of the private secondary audience of this Activity Pub Object.
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BCC ItemCollection `jsonld:"bcc,omitempty"`
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// Duration when the object describes a time-bound resource, such as an audio or video, a meeting, etc,
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// the duration property indicates the object's approximate duration.
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// The value must be expressed as an xsd:duration as defined by [ xmlschema11-2],
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// section 3.3.6 (e.g. a period of 5 seconds is represented as "PT5S").
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Duration time.Duration `jsonld:"duration,omitempty"`
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// This is a list of all Like activities with this object as the object property, added as a side effect.
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// The likes collection MUST be either an OrderedCollection or a Collection and MAY be filtered on privileges
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// of an authenticated user or as appropriate when no authentication is given.
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Likes Item `jsonld:"likes,omitempty"`
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// This is a list of all Announce activities with this object as the object property, added as a side effect.
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// The shares collection MUST be either an OrderedCollection or a Collection and MAY be filtered on privileges
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// of an authenticated user or as appropriate when no authentication is given.
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Shares Item `jsonld:"shares,omitempty"`
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// Source property is intended to convey some sort of source from which the content markup was derived,
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// as a form of provenance, or to support future editing by clients.
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// In general, clients do the conversion from source to content, not the other way around.
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Source Source `jsonld:"source,omitempty"`
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// In a paged Collection, indicates the page that contains the most recently updated member items.
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Current ObjectOrLink `jsonld:"current,omitempty"`
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// In a paged Collection, indicates the furthest preceding page of items in the collection.
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First ObjectOrLink `jsonld:"first,omitempty"`
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// In a paged Collection, indicates the furthest proceeding page of the collection.
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Last ObjectOrLink `jsonld:"last,omitempty"`
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// A non-negative integer specifying the total number of objects contained by the logical view of the collection.
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// This number might not reflect the actual number of items serialized within the Collection object instance.
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TotalItems uint `jsonld:"totalItems"`
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// Identifies the items contained in a collection. The items might be ordered or unordered.
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Items ItemCollection `jsonld:"items,omitempty"`
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}
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type (
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// FollowersCollection is a collection of followers
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FollowersCollection = Collection
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// FollowingCollection is a list of everybody that the actor has followed, added as a side effect.
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// The following collection MUST be either an OrderedCollection or a Collection and MAY
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// be filtered on privileges of an authenticated user or as appropriate when no authentication is given.
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FollowingCollection = Collection
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)
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// CollectionNew initializes a new Collection
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func CollectionNew(id ID) *Collection {
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c := Collection{ID: id, Type: CollectionType}
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c.Name = NaturalLanguageValuesNew()
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c.Content = NaturalLanguageValuesNew()
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c.Summary = NaturalLanguageValuesNew()
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return &c
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}
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2018-10-24 09:28:55 +00:00
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// OrderedCollectionNew initializes a new OrderedCollection
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func OrderedCollectionNew(id ID) *OrderedCollection {
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o := OrderedCollection{ID: id, Type: OrderedCollectionType}
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o.Name = NaturalLanguageValuesNew()
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o.Content = NaturalLanguageValuesNew()
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2018-06-09 12:05:46 +00:00
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return &o
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2017-09-11 21:16:43 +00:00
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}
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// GetID returns the ID corresponding to the Collection object
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func (c Collection) GetID() ID {
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return c.ID
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}
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2018-07-16 13:58:36 +00:00
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// GetType returns the Collection's type
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func (c Collection) GetType() ActivityVocabularyType {
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return c.Type
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}
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// IsLink returns false for a Collection object
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func (c Collection) IsLink() bool {
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return false
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}
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// IsObject returns true for a Collection object
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func (c Collection) IsObject() bool {
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return true
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}
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// IsCollection returns true for Collection objects
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func (c Collection) IsCollection() bool {
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return true
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}
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// GetLink returns the IRI corresponding to the Collection object
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func (c Collection) GetLink() IRI {
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return IRI(c.ID)
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}
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// Collection returns the Collection's items
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func (c Collection) Collection() ItemCollection {
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return c.Items
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}
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2018-07-16 13:58:36 +00:00
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// Append adds an element to a Collection
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func (c *Collection) Append(ob Item) error {
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c.Items = append(c.Items, ob)
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return nil
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}
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// Count returns the maximum between the length of Items in collection and its TotalItems property
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func (c *Collection) Count() uint {
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if c == nil {
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return 0
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}
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return uint(len(c.Items))
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}
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2018-07-07 19:27:34 +00:00
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// Contains verifies if Collection array contains the received one
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func (c Collection) Contains(r Item) bool {
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if len(c.Items) == 0 {
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return false
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}
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2020-05-07 14:44:17 +00:00
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for _, it := range c.Items {
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if ItemsEqual(it, r) {
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return true
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}
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}
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return false
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2018-07-24 21:11:08 +00:00
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}
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2021-11-12 18:10:31 +00:00
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// UnmarshalJSON decodes an incoming JSON document into the receiver object.
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func (c *Collection) UnmarshalJSON(data []byte) error {
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par := fastjson.Parser{}
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val, err := par.ParseBytes(data)
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if err != nil {
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return err
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}
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return JSONLoadCollection(val, c)
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}
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// MarshalJSON encodes the receiver object to a JSON document.
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func (c Collection) MarshalJSON() ([]byte, error) {
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b := make([]byte, 0)
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notEmpty := false
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write(&b, '{')
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OnObject(c, func(o *Object) error {
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notEmpty = writeObjectJSONValue(&b, *o)
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return nil
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})
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if c.Current != nil {
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notEmpty = writeItemJSONProp(&b, "current", c.Current) || notEmpty
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}
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if c.First != nil {
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notEmpty = writeItemJSONProp(&b, "first", c.First) || notEmpty
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}
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if c.Last != nil {
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notEmpty = writeItemJSONProp(&b, "last", c.Last) || notEmpty
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}
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notEmpty = writeIntJSONProp(&b, "totalItems", int64(c.TotalItems)) || notEmpty
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if c.Items != nil {
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notEmpty = writeItemCollectionJSONProp(&b, "items", c.Items) || notEmpty
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}
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if notEmpty {
|
2019-12-19 16:05:12 +00:00
|
|
|
write(&b, '}')
|
|
|
|
return b, nil
|
2019-12-19 12:35:05 +00:00
|
|
|
}
|
|
|
|
return nil, nil
|
|
|
|
}
|
|
|
|
|
2021-03-14 18:36:32 +00:00
|
|
|
// UnmarshalBinary implements the encoding.BinaryUnmarshaler interface.
|
|
|
|
func (c *Collection) UnmarshalBinary(data []byte) error {
|
2022-01-12 17:57:45 +00:00
|
|
|
return c.GobDecode(data)
|
2021-03-14 18:36:32 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
// MarshalBinary implements the encoding.BinaryMarshaler interface.
|
|
|
|
func (c Collection) MarshalBinary() ([]byte, error) {
|
2022-01-12 17:57:45 +00:00
|
|
|
return c.GobEncode()
|
2021-03-14 18:36:32 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
func (c Collection) GobEncode() ([]byte, error) {
|
2022-01-12 17:57:45 +00:00
|
|
|
var mm = make(map[string][]byte)
|
|
|
|
hasData, err := mapCollectionProperties(mm, c)
|
|
|
|
if err != nil {
|
|
|
|
return nil, err
|
|
|
|
}
|
|
|
|
if !hasData {
|
|
|
|
return []byte{}, nil
|
|
|
|
}
|
|
|
|
bb := bytes.Buffer{}
|
|
|
|
g := gob.NewEncoder(&bb)
|
|
|
|
if err := g.Encode(mm); err != nil {
|
|
|
|
return nil, err
|
|
|
|
}
|
|
|
|
return bb.Bytes(), nil
|
2021-03-14 18:36:32 +00:00
|
|
|
}
|
|
|
|
|
2022-01-12 17:57:45 +00:00
|
|
|
func (c *Collection) GobDecode(data []byte) error {
|
|
|
|
if len(data) == 0 {
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
mm, err := gobDecodeObjectAsMap(data)
|
|
|
|
if err != nil {
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
return unmapCollectionProperties(mm, c)
|
2021-03-14 18:36:32 +00:00
|
|
|
}
|
|
|
|
|
2022-05-25 11:46:03 +00:00
|
|
|
func (c Collection) Format(s fmt.State, verb rune) {
|
|
|
|
switch verb {
|
|
|
|
case 's', 'v':
|
|
|
|
io.WriteString(s, fmt.Sprintf("%T[%s] { totalItems: %d }", c, c.Type, c.TotalItems))
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-08-21 20:21:32 +00:00
|
|
|
// ToCollection
|
|
|
|
func ToCollection(it Item) (*Collection, error) {
|
|
|
|
switch i := it.(type) {
|
|
|
|
case *Collection:
|
|
|
|
return i, nil
|
|
|
|
case Collection:
|
|
|
|
return &i, nil
|
2019-12-04 18:33:15 +00:00
|
|
|
case *CollectionPage:
|
|
|
|
return (*Collection)(unsafe.Pointer(i)), nil
|
|
|
|
case CollectionPage:
|
|
|
|
return (*Collection)(unsafe.Pointer(&i)), nil
|
2020-07-16 19:54:46 +00:00
|
|
|
default:
|
|
|
|
// NOTE(marius): this is an ugly way of dealing with the interface conversion error: types from different scopes
|
|
|
|
typ := reflect.TypeOf(new(Collection))
|
2020-08-30 12:50:04 +00:00
|
|
|
val := reflect.ValueOf(it)
|
|
|
|
if val.IsValid() && typ.Elem().Name() == val.Type().Elem().Name() {
|
|
|
|
conv := val.Convert(typ)
|
|
|
|
if i, ok := conv.Interface().(*Collection); ok {
|
2020-07-16 19:54:46 +00:00
|
|
|
return i, nil
|
|
|
|
}
|
|
|
|
}
|
2019-08-21 20:21:32 +00:00
|
|
|
}
|
2022-05-25 11:55:18 +00:00
|
|
|
return nil, ErrorInvalidType[Collection](it)
|
2019-08-21 20:21:32 +00:00
|
|
|
}
|
2019-12-19 12:30:18 +00:00
|
|
|
|
2020-12-28 16:53:47 +00:00
|
|
|
// ItemsMatch
|
|
|
|
func (c Collection) ItemsMatch(col ...Item) bool {
|
|
|
|
for _, it := range col {
|
|
|
|
if match := c.Items.Contains(it); !match {
|
|
|
|
return false
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return true
|
2020-05-07 14:44:17 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
// Equals
|
|
|
|
func (c Collection) Equals(with Item) bool {
|
2021-02-02 13:18:16 +00:00
|
|
|
if IsNil(with) {
|
2020-05-07 14:44:17 +00:00
|
|
|
return false
|
|
|
|
}
|
|
|
|
if !with.IsCollection() {
|
|
|
|
return false
|
|
|
|
}
|
|
|
|
result := true
|
|
|
|
OnCollection(with, func(w *Collection) error {
|
|
|
|
OnObject(w, func(wo *Object) error {
|
|
|
|
if !wo.Equals(c) {
|
|
|
|
result = false
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
return nil
|
|
|
|
})
|
|
|
|
if w.TotalItems > 0 {
|
|
|
|
if w.TotalItems != c.TotalItems {
|
|
|
|
result = false
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if w.Current != nil {
|
|
|
|
if !ItemsEqual(c.Current, w.Current) {
|
|
|
|
result = false
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if w.First != nil {
|
|
|
|
if !ItemsEqual(c.First, w.First) {
|
|
|
|
result = false
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if w.Last != nil {
|
|
|
|
if !ItemsEqual(c.Last, w.Last) {
|
|
|
|
result = false
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if w.Items != nil {
|
|
|
|
if !c.Items.Equals(w.Items) {
|
|
|
|
result = false
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return nil
|
|
|
|
})
|
|
|
|
return result
|
2020-03-29 16:26:30 +00:00
|
|
|
}
|