⚗️ Play with activitypub

go.mod

@@ -36,7 +36,7 @@ require (
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/fsnotify/fsnotify v1.8.0 // indirect
 	github.com/gabriel-vasile/mimetype v1.4.3 // indirect
-	github.com/go-ap/activitypub v0.0.0-20250124194921-d52b4c694e14 // indirect
+	github.com/go-ap/activitypub v0.0.0-20250212090640-aeb6499ba581 // indirect
 	github.com/go-ap/errors v0.0.0-20250124135319-3da8adefd4a9 // indirect
 	github.com/go-ap/jsonld v0.0.0-20221030091449-f2a191312c73 // indirect
 	github.com/go-playground/locales v0.14.1 // indirect

go.sum

@@ -99,6 +99,8 @@ github.com/gabriel-vasile/mimetype v1.4.3 h1:in2uUcidCuFcDKtdcBxlR0rJ1+fsokWf+uq
 github.com/gabriel-vasile/mimetype v1.4.3/go.mod h1:d8uq/6HKRL6CGdk+aubisF/M5GcPfT7nKyLpA0lbSSk=
 github.com/go-ap/activitypub v0.0.0-20250124194921-d52b4c694e14 h1:4VkepceDBxPt9BwsHncwtwIZCCgCuxctFHfosz8aWQA=
 github.com/go-ap/activitypub v0.0.0-20250124194921-d52b4c694e14/go.mod h1:IO2PtAsxfGXN5IHrPuOslENFbq7MprYLNOyiiOELoRQ=
+github.com/go-ap/activitypub v0.0.0-20250212090640-aeb6499ba581 h1:73sFEdBsWBTBut0aDMPgt8HRuMO+ML0fd8AA/zjO8BQ=
+github.com/go-ap/activitypub v0.0.0-20250212090640-aeb6499ba581/go.mod h1:IO2PtAsxfGXN5IHrPuOslENFbq7MprYLNOyiiOELoRQ=
 github.com/go-ap/errors v0.0.0-20250124135319-3da8adefd4a9 h1:AJBGzuJVgfkKF3LoXCNQfH9yWmsVDV/oPDJE/zeXOjE=
 github.com/go-ap/errors v0.0.0-20250124135319-3da8adefd4a9/go.mod h1:Vkh+Z3f24K8nMsJKXo1FHn5ebPsXvB/WDH5JRtYqdNo=
 github.com/go-ap/jsonld v0.0.0-20221030091449-f2a191312c73 h1:GMKIYXyXPGIp+hYiWOhfqK4A023HdgisDT4YGgf99mw=

pkg/internal/http/api/activitypub_api.go

@@ -0,0 +1,92 @@
+package api
+
+import (
+	"fmt"
+	"git.solsynth.dev/hypernet/interactive/pkg/internal/database"
+	"git.solsynth.dev/hypernet/interactive/pkg/internal/models"
+	"git.solsynth.dev/hypernet/interactive/pkg/internal/services"
+	vocab "github.com/go-ap/activitypub"
+	"github.com/gofiber/fiber/v2"
+	"github.com/samber/lo"
+	"time"
+)
+
+func apGetPublisher(c *fiber.Ctx) error {
+	name := c.Params("name")
+
+	var publisher models.Publisher
+	if err := database.C.Where("name = ?", name).First(&publisher).Error; err != nil {
+		return fiber.NewError(fiber.StatusNotFound, err.Error())
+	}
+
+	url := vocab.ID("https://solsynth.dev/publishers/" + publisher.Name)
+	actor := vocab.Actor{
+		ID:   url,
+		Type: vocab.PersonType,
+		Name: vocab.DefaultNaturalLanguageValue(publisher.Nick),
+		URL:  url,
+		Icon: vocab.Image{},
+	}
+
+	return c.JSON(actor)
+}
+
+func apGetPost(c *fiber.Ctx) error {
+	take := c.QueryInt("take", 0)
+	offset := c.QueryInt("offset", 0)
+
+	tx := database.C
+
+	var err error
+	if tx, err = universalPostFilter(c, tx); err != nil {
+		return err
+	}
+
+	items, err := services.ListPost(tx, take, offset, "published_at DESC")
+	if err != nil {
+		return fiber.NewError(fiber.StatusBadRequest, err.Error())
+	}
+
+	if c.QueryBool("truncate", true) {
+		for _, item := range items {
+			if item != nil {
+				item = lo.ToPtr(services.TruncatePostContent(*item))
+			}
+		}
+	}
+
+	var acts []vocab.Activity
+	for _, item := range items {
+		pubUrl := vocab.ID("https://solsynth.dev/publishers/" + item.Publisher.Name)
+		url := fmt.Sprintf("https://solsynth.dev/posts/%d", item.ID)
+		content, ok := item.Body["content"].(string)
+		if !ok {
+			content = "Posted a post"
+		}
+		acts = append(acts, vocab.Activity{
+			ID:   vocab.ID(url),
+			Type: vocab.CreateType,
+			Actor: vocab.Actor{
+				ID:   pubUrl,
+				Type: vocab.PersonType,
+				Name: vocab.DefaultNaturalLanguageValue(item.Publisher.Nick),
+				URL:  pubUrl,
+				Icon: vocab.Image{},
+			},
+			Object: vocab.Object{
+				ID:   vocab.ID(url),
+				Type: vocab.NoteType,
+				Name: vocab.DefaultNaturalLanguageValue(content),
+				URL:  vocab.ID(url),
+				Icon: vocab.Image{},
+			},
+			Published: lo.TernaryF(item.PublishedAt != nil, func() time.Time {
+				return *item.PublishedAt
+			}, func() time.Time {
+				return item.CreatedAt
+			}),
+		})
+	}
+
+	return c.JSON(acts)
+}

pkg/internal/http/api/index.go

@@ -7,6 +7,12 @@ import (
 func MapAPIs(app *fiber.App, baseURL string) {
 	api := app.Group(baseURL).Name("API")
 	{
+		activitypub := api.Group("/activitypub").Name("ActivityPub API")
+		{
+			activitypub.Get("/publishers/:name", apGetPublisher)
+			activitypub.Get("/posts", apGetPost)
+		}
+
 		publishers := api.Group("/publishers").Name("Publisher API")
 		{
 			publishers.Get("/", listRelatedPublisher)