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forgejo/modules/forgefed/repository.go

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// Copyright 2023 The Forgejo Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package forgefed
import (
"reflect"
"unsafe"
ap "github.com/go-ap/activitypub"
"github.com/valyala/fastjson"
)
const (
RepositoryType ap.ActivityVocabularyType = "Repository"
)
type Repository struct {
ap.Actor
// Team Collection of actors who have management/push access to the repository
Team ap.Item `jsonld:"team,omitempty"`
// Forks OrderedCollection of repositories that are forks of this repository
Forks ap.Item `jsonld:"forks,omitempty"`
// ForkedFrom Identifies the repository which this repository was created as a fork
ForkedFrom ap.Item `jsonld:"forkedFrom,omitempty"`
}
// RepositoryNew initializes a Repository type actor
func RepositoryNew(id ap.ID) *Repository {
a := ap.ActorNew(id, RepositoryType)
a.Type = RepositoryType
o := Repository{Actor: *a}
return &o
}
func (r Repository) MarshalJSON() ([]byte, error) {
b, err := r.Actor.MarshalJSON()
if len(b) == 0 || err != nil {
return nil, err
}
b = b[:len(b)-1]
if r.Team != nil {
ap.JSONWriteItemProp(&b, "team", r.Team)
}
if r.Forks != nil {
ap.JSONWriteItemProp(&b, "forks", r.Forks)
}
if r.ForkedFrom != nil {
ap.JSONWriteItemProp(&b, "forkedFrom", r.ForkedFrom)
}
ap.JSONWrite(&b, '}')
return b, nil
}
func JSONLoadRepository(val *fastjson.Value, r *Repository) error {
if err := ap.OnActor(&r.Actor, func(a *ap.Actor) error {
return ap.JSONLoadActor(val, a)
}); err != nil {
return err
}
r.Team = ap.JSONGetItem(val, "team")
r.Forks = ap.JSONGetItem(val, "forks")
r.ForkedFrom = ap.JSONGetItem(val, "forkedFrom")
return nil
}
func (r *Repository) UnmarshalJSON(data []byte) error {
p := fastjson.Parser{}
val, err := p.ParseBytes(data)
if err != nil {
return err
}
return JSONLoadRepository(val, r)
}
// ToRepository tries to convert the it Item to a Repository Actor.
func ToRepository(it ap.Item) (*Repository, error) {
switch i := it.(type) {
case *Repository:
return i, nil
case Repository:
return &i, nil
case *ap.Actor:
return (*Repository)(unsafe.Pointer(i)), nil
case ap.Actor:
return (*Repository)(unsafe.Pointer(&i)), nil
default:
// NOTE(marius): this is an ugly way of dealing with the interface conversion error: types from different scopes
typ := reflect.TypeOf(new(Repository))
if i, ok := reflect.ValueOf(it).Convert(typ).Interface().(*Repository); ok {
return i, nil
}
}
return nil, ap.ErrorInvalidType[ap.Actor](it)
}
type withRepositoryFn func(*Repository) error
// OnRepository calls function fn on it Item if it can be asserted to type *Repository
func OnRepository(it ap.Item, fn withRepositoryFn) error {
if it == nil {
return nil
}
ob, err := ToRepository(it)
if err != nil {
return err
}
return fn(ob)
}