activity

package
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 Go to latest Published: Aug 3, 2018 License: AGPL-3.0 Imports: 20 Imported by: 0

README

Activity Service

Description

Boxes

This service listen for various platform events and "fan-out" and denormalize them to various boxes to build events feeds for entities: nodes (files/folders activities) and users. Boxes can be "inbox" and "outbox" : inbox gather all events from other entities that the entitiy has subscribed to, whereas outbox gather all activities of the current entity. Typically, user outbox shows all activity a user ( = my activity ), user inbox is the feed of what happened on the platform that a user wants to see ( = my wall ).

Subscriptions

The service also stores the subscription between entities, basically the user "watches" on other entities. Watches are currently implemented for users watching on nodes, but it could also be used e.g. to subscribe to another user activies, or other types of events (to be defined).

Relative paths and nodes filtering

Activities are stored "absolute" : nodes have their UUID and their path is absolute referring to the inner Tree Service. It's the "client" mission to filter nodes and display their correct path depending on the user context, typically to show the node pathes inside the allowed workspaces of the user. An activity object can thus contains more than one workspace Path if a user accesses the same node from multiple workspaces. See example below and the "partOf" attribute of the first activity.

Activity Streams 2.0 (AS2)

Activities are produced in JSON format using the the W3C Activity Streams 2.0 format. This is an open specification for all events generally produced in a social network platform, each activity is mainly described by a Type, an Actor (itself an activity object of type "Person") and an Object (itself an activity object of a certain type, e.g. Document, Folder, etc...).

Types are listed under https://www.w3.org/TR/activitystreams-vocabulary/, and Pydio extends the Types list with the following types: Folder, Workspace, Digest.

AS2 datamodel also describes various types of Collections to send back a list of Activities, which Pydio uses for responses. Here is a sample output of rest call to activity service:

{
    "@context": "https://www.w3.org/ns/activitystreams",
    "type": "Collection",
    "items": [
        {
            "@context": "https://www.w3.org/ns/activitystreams",
            "type": "Read",
            "id": "/activity-14",
            "name": "File Event",
            "summary": "Folder [Répertoire](http://localhost/docs/charlie/PENDING/Répertoire) was accessed by [admin](http://localhost/users/admin)",
            "updated": "2017-10-30T08:07:46.000Z",
            "actor": {
                "type": "Person",
                "id": "admin",
                "name": "admin"
            },
            "object": {
                "type": "Folder",
                "id": "AiXrqq8KTBEKnEJ4Vqj6iaZ0nJ34uNsoPiq7",
                "name": "charlie/PENDING/Répertoire",
                "partOf": {
                    "type": "Collection",
                    "items": [
                        {
                            "type": "Workspace",
                            "id": "21f31459698c74ec1e0f022c8eaadc62",
                            "name": "Charlie",
                            "rel": "charlie/PENDING/Répertoire"
                        },
                        {
                            "type": "Workspace",
                            "id": "7765fd1d105c8382f49a692ebc2bd8dc",
                            "name": "Pending",
                            "rel": "pending/Répertoire"
                        }
                    ]
                }
            }
        },
        {
            "@context": "https://www.w3.org/ns/activitystreams",
            "type": "Read",
            "id": "/activity-9",
            "name": "File Event",
            "summary": "Folder [New Folder](http://localhost/docs/charlie/PENDING/Répertoire/New Folder) was accessed by [admin](http://localhost/users/admin)",
            "updated": "2017-10-27T10:43:47.000Z",
            "actor": {
                "type": "Person",
                "id": "admin",
                "name": "admin"
            },
            "object": {
                "type": "Folder",
                "id": "g0nznpi9dj9JNxHPbxnxoULiJ5kgF9uoKMGb",
                "name": "charlie/PENDING/Répertoire/New Folder",
                "partOf": {
                    "type": "Collection",
                    "items": [
                        {
                            "type": "Workspace",
                            "id": "21f31459698c74ec1e0f022c8eaadc62",
                            "name": "Charlie",
                            "rel": "charlie/PENDING/Répertoire/New Folder"
                        },
                        {
                            "type": "Workspace",
                            "id": "7765fd1d105c8382f49a692ebc2bd8dc",
                            "name": "Pending",
                            "rel": "pending/Répertoire/New Folder"
                        }
                    ]
                }
            }
        }
    ],
    "totalItems": 2
}

Activity Service also generates a Markdown summary of activities, to be used for display by various clients.

Interfaces

GRPC

Grpc service implements the activity.ActivityService (see common/proto/activity) in GRPC, to set/get subscriptions, post activities, list activities from a given Box.

REST

Rest service exposes the activities in REST format. Rest endpoints are described in common/proto/rest.proto file :

  • POST /subscriptions : post a query to list subscriptions
  • POST /stream : post a query to list activities
  • POST /subscribe : post a subscription from a given entity to another one
Subscriber

Subscriber listens to NodeChangeEvent and produces activities for nodes.

Digests

Activity service provides a scheduler-compatible "action" to generate digests from activity streams, starting at a given offest (.e.g. last activity sent in previous digest). Digest is filtering activities and grouping them by Workspace into activity collections of specific type Digest. As user can eventually access to a given node from many workspaces, events may appear multiple times under different workspaces.

Here is an example:

{
    "@context": "https://www.w3.org/ns/activitystreams",
    "type": "Digest",
    "items": [
        {
            "@context": "https://www.w3.org/ns/activitystreams",
            "type": "Workspace",
            "id": "7765fd1d105c8382f49a692ebc2bd8dc",
            "name": "Pending",
            "items": [
                {
                    "@context": "https://www.w3.org/ns/activitystreams",
                    "type": "Read",
                    "id": "/activity-17",
                    "name": "File Event",
                    "summary": "Folder [New Folder](http://localhost/docs/g0nznpi9dj9JNxHPbxnxoULiJ5kgF9uoKMGb) was accessed by [admin](http://localhost/users/admin)",
                    "updated": "2017-10-30T09:07:15.000Z",
                    "actor": {
                        "type": "Person",
                        "id": "admin",
                        "name": "admin"
                    },
                    "object": {
                        "type": "Folder",
                        "id": "g0nznpi9dj9JNxHPbxnxoULiJ5kgF9uoKMGb",
                        "name": "pending/Répertoire/New Folder"
                    }
                },
                {
                    "@context": "https://www.w3.org/ns/activitystreams",
                    "type": "Read",
                    "id": "/activity-15",
                    "name": "File Event",
                    "summary": "Folder [Répertoire](http://localhost/docs/AiXrqq8KTBEKnEJ4Vqj6iaZ0nJ34uNsoPiq7) was accessed by [admin](http://localhost/users/admin)",
                    "updated": "2017-10-30T08:29:14.000Z",
                    "actor": {
                        "type": "Person",
                        "id": "admin",
                        "name": "admin"
                    },
                    "object": {
                        "type": "Folder",
                        "id": "AiXrqq8KTBEKnEJ4Vqj6iaZ0nJ34uNsoPiq7",
                        "name": "pending/Répertoire"
                    }
                },
                {
                    "@context": "https://www.w3.org/ns/activitystreams",
                    "type": "Create",
                    "id": "/activity-6",
                    "name": "File Event",
                    "summary": "Folder [New Folder](http://localhost/docs/g0nznpi9dj9JNxHPbxnxoULiJ5kgF9uoKMGb) was created by [user](http://localhost/users/user)",
                    "updated": "2017-10-27T10:43:32.000Z",
                    "actor": {
                        "type": "Person",
                        "id": "user",
                        "name": "user"
                    },
                    "object": {
                        "type": "Folder",
                        "id": "g0nznpi9dj9JNxHPbxnxoULiJ5kgF9uoKMGb",
                        "name": "pending/Répertoire/New Folder"
                    }
                },
                {
                    "@context": "https://www.w3.org/ns/activitystreams",
                    "type": "Read",
                    "id": "/activity-5",
                    "name": "File Event",
                    "summary": "Folder [Numériser.jpeg](http://localhost/docs/3bf5ba64-b968-11e7-9496-28cfe919ca6f) was accessed by [user](http://localhost/users/user)",
                    "updated": "2017-10-27T10:43:15.000Z",
                    "actor": {
                        "type": "Person",
                        "id": "user",
                        "name": "user"
                    },
                    "object": {
                        "type": "Folder",
                        "id": "3bf5ba64-b968-11e7-9496-28cfe919ca6f",
                        "name": "pending/Répertoire/Numériser.jpeg"
                    }
                },
                {
                    "@context": "https://www.w3.org/ns/activitystreams",
                    "type": "Move",
                    "id": "/activity-4",
                    "name": "File Event",
                    "summary": "Document [Numériser.jpeg](http://localhost/docs/3bf5ba64-b968-11e7-9496-28cfe919ca6f) was moved by [user](http://localhost/users/user)",
                    "updated": "2017-10-27T10:43:14.000Z",
                    "actor": {
                        "type": "Person",
                        "id": "user",
                        "name": "user"
                    },
                    "object": {
                        "type": "Document",
                        "id": "3bf5ba64-b968-11e7-9496-28cfe919ca6f",
                        "name": "pending/Répertoire/Numériser.jpeg"
                    },
                    "target": {
                        "type": "Document",
                        "id": "3bf5ba64-b968-11e7-9496-28cfe919ca6f",
                        "name": "pending/Répertoire/Numériser.jpeg"
                    },
                    "origin": {
                        "type": "Document",
                        "name": "pending/Répertoire/Numériser 1.jpeg"
                    }
                }
            ]
        },
        {
            "@context": "https://www.w3.org/ns/activitystreams",
            "type": "Workspace",
            "id": "21f31459698c74ec1e0f022c8eaadc62",
            "name": "Charlie",
            "items": [
                {
                    "@context": "https://www.w3.org/ns/activitystreams",
                    "type": "Read",
                    "id": "/activity-17",
                    "name": "File Event",
                    "summary": "Folder [New Folder](http://localhost/docs/g0nznpi9dj9JNxHPbxnxoULiJ5kgF9uoKMGb) was accessed by [admin](http://localhost/users/admin)",
                    "updated": "2017-10-30T09:07:15.000Z",
                    "actor": {
                        "type": "Person",
                        "id": "admin",
                        "name": "admin"
                    },
                    "object": {
                        "type": "Folder",
                        "id": "g0nznpi9dj9JNxHPbxnxoULiJ5kgF9uoKMGb",
                        "name": "charlie/PENDING/Répertoire/New Folder"
                    }
                }
            ]
        }
    ],
    "totalItems": 2
}

Documentation

Overview

Package activity stores and distributes events to users in a social-feed manner.

It is composed of two services, one GRPC for persistence layer and one REST for logic. Persistence is currently only implemented using a BoltDB store.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func Collection 

func Collection(items []*activity.Object) (c *activity.Object)

Collection groups activities into a collection.

func CountCollection 

func CountCollection(count int32) (c *activity.Object)

CountCollection is a simple container for N activities.

func Digest 

func Digest(ctx context.Context, items []*activity.Object) (*activity.Object, error)

Digest builds a digest based on user Claims that are retrieved from the context.

func DocumentActivity 

func DocumentActivity(author string, event *tree.NodeChangeEvent) (ac *activity.Object, detectedNode *tree.Node)

func NewDAO 

func NewDAO(o dao.DAO) dao.DAO

Types

type BoxName 

type BoxName string
const (
	BoxInbox         BoxName = "inbox"
	BoxOutbox        BoxName = "outbox"
	BoxSubscriptions BoxName = "subscriptions"
	BoxLastRead      BoxName = "lastread"
	BoxLastSent      BoxName = "lastsent"
)

type DAO 

type DAO interface {
	dao.DAO

	// Post an activity to target inbox
	PostActivity(ownerType activity.OwnerType, ownerId string, boxName BoxName, object *activity.Object) error

	// Update Subscription status
	UpdateSubscription(subscription *activity.Subscription) error

	// List subscriptions on a given object
	// Returns a map of userId => status (true/false, required to disable default subscriptions like workspaces)
	ListSubscriptions(objectType activity.OwnerType, objectIds []string) ([]*activity.Subscription, error)

	// Count the number of unread activities in user "Inbox" box
	CountUnreadForUser(userId string) int

	// Load activities for a given owner. Targets "outbox" by default
	ActivitiesFor(ownerType activity.OwnerType, ownerId string, boxName BoxName, refBoxOffset BoxName, reverseOffset int64, limit int64, result chan *activity.Object, done chan bool) error

	// Store the last read uint ID for a given box
	StoreLastUserInbox(userId string, boxName BoxName, last []byte, activityId string) error

	// Should be wired to "USER_DELETE" and "NODE_DELETE" events
	// to remove (or archive?) deprecated queues
	Delete(ownerType activity.OwnerType, ownerId string) error
}

Source Files

View all Source files

Directories

Path Synopsis
Package actions provides a scheduler action for generating mail digests
 Package actions provides a scheduler action for generating mail digests
Package grpc is the persistence service for all activities.
 Package grpc is the persistence service for all activities.
Package lang provides i18n strings related to activities
 Package lang provides i18n strings related to activities
Package render provides helper for rendering activies into various formats (currently markdown).
 Package render provides helper for rendering activies into various formats (currently markdown).
Package rest exposes a Rest service for querying activities feed
 Package rest exposes a Rest service for querying activities feed

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