owl-blogs/web/activity_pub_handler.go

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package web
import (
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"net/url"
"owl-blogs/app"
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"owl-blogs/app/repository"
"owl-blogs/config"
"owl-blogs/domain/model"
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vocab "github.com/go-ap/activitypub"
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"github.com/gofiber/fiber/v2"
)
const ACT_PUB_CONF_NAME = "activity_pub"
type ActivityPubServer struct {
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configRepo repository.ConfigRepository
entryService *app.EntryService
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}
type ActivityPubConfig struct {
PreferredUsername string `owl:"inputType=text"`
PublicKeyPem string `owl:"inputType=text widget=textarea"`
PrivateKeyPem string `owl:"inputType=text widget=textarea"`
}
type WebfingerResponse struct {
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Subject string `json:"subject"`
Links []WebfingerLink `json:"links"`
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}
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type WebfingerLink struct {
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Rel string `json:"rel"`
Type string `json:"type"`
Href string `json:"href"`
}
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func NewActivityPubServer(configRepo repository.ConfigRepository, entryService *app.EntryService) *ActivityPubServer {
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return &ActivityPubServer{
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configRepo: configRepo,
entryService: entryService,
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}
}
func (s *ActivityPubServer) HandleWebfinger(ctx *fiber.Ctx) error {
siteConfig := model.SiteConfig{}
apConfig := ActivityPubConfig{}
s.configRepo.Get(ACT_PUB_CONF_NAME, &apConfig)
s.configRepo.Get(config.SITE_CONFIG, &siteConfig)
webfinger := WebfingerResponse{
Subject: ctx.Query("resource"),
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Links: []WebfingerLink{
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{
Rel: "self",
Type: "application/activity+json",
Href: siteConfig.FullUrl + "/activitypub/actor",
},
},
}
return ctx.JSON(webfinger)
}
func (s *ActivityPubServer) Router(router fiber.Router) {
router.Get("/actor", s.HandleActor)
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router.Get("/outbox", s.HandleOutbox)
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}
func (s *ActivityPubServer) HandleActor(ctx *fiber.Ctx) error {
siteConfig := model.SiteConfig{}
apConfig := ActivityPubConfig{}
s.configRepo.Get(ACT_PUB_CONF_NAME, &apConfig)
s.configRepo.Get(config.SITE_CONFIG, &siteConfig)
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actor := vocab.PersonNew(vocab.IRI(siteConfig.FullUrl + "/activitypub/actor"))
actor.PreferredUsername = vocab.NaturalLanguageValues{{Value: vocab.Content(apConfig.PreferredUsername)}}
actor.Inbox = vocab.IRI(siteConfig.FullUrl + "/activitypub/inbox")
actor.Outbox = vocab.IRI(siteConfig.FullUrl + "/activitypub/outbox")
actor.Followers = vocab.IRI(siteConfig.FullUrl + "/activitypub/followers")
actor.PublicKey = vocab.PublicKey{
ID: vocab.ID(siteConfig.FullUrl + "/activitypub/actor#main-key"),
Owner: vocab.IRI(siteConfig.FullUrl + "/activitypub/actor"),
PublicKeyPem: apConfig.PublicKeyPem,
}
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data, err := actor.MarshalJSON()
if err != nil {
return err
}
ctx.Set("Content-Type", "application/activity+json")
return ctx.Send(data)
}
func (s *ActivityPubServer) HandleOutbox(ctx *fiber.Ctx) error {
siteConfig := model.SiteConfig{}
apConfig := ActivityPubConfig{}
s.configRepo.Get(ACT_PUB_CONF_NAME, &apConfig)
s.configRepo.Get(config.SITE_CONFIG, &siteConfig)
entries, err := s.entryService.FindAllByType(nil, true, false)
if err != nil {
return err
}
items := make([]vocab.Item, len(entries))
for i, entry := range entries {
url, _ := url.JoinPath(siteConfig.FullUrl, "/posts/"+entry.ID()+"/")
items[i] = *vocab.ActivityNew(vocab.IRI(url), vocab.CreateType, vocab.Object{
ID: vocab.ID(url),
Type: vocab.ArticleType,
Content: vocab.NaturalLanguageValues{
{Value: vocab.Content(entry.Content())},
},
})
}
outbox := vocab.OrderedCollectionNew(vocab.IRI(siteConfig.FullUrl + "/activitypub/outbox"))
outbox.TotalItems = uint(len(items))
outbox.OrderedItems = items
data, err := outbox.MarshalJSON()
if err != nil {
return err
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}
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ctx.Set("Content-Type", "application/activity+json")
return ctx.Send(data)
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}