From 15e38a9bafde76247aa5e8fa0a0d0f8b8b71711b Mon Sep 17 00:00:00 2001
From: LittleSheep <littlesheep.code@hotmail.com>
Date: Tue, 11 Mar 2025 21:51:14 +0800
Subject: [PATCH] :sparkles: Support webfinger

---
 pkg/internal/http/api/index.go         |  1 +
 pkg/internal/http/api/webfinger_api.go | 59 ++++++++++++++++++++++++++
 2 files changed, 60 insertions(+)
 create mode 100644 pkg/internal/http/api/webfinger_api.go

diff --git a/pkg/internal/http/api/index.go b/pkg/internal/http/api/index.go
index 3f347ab..bca4e90 100644
--- a/pkg/internal/http/api/index.go
+++ b/pkg/internal/http/api/index.go
@@ -7,6 +7,7 @@ import (
 func MapAPIs(app *fiber.App, baseURL string) {
 	api := app.Group(baseURL).Name("API")
 	{
+		api.Get("/webfinger", getWebfinger)
 		activitypub := api.Group("/activitypub").Name("ActivityPub API")
 		{
 			activitypub.Post("/users/:name/inbox", apUserInbox)
diff --git a/pkg/internal/http/api/webfinger_api.go b/pkg/internal/http/api/webfinger_api.go
new file mode 100644
index 0000000..d72dbf8
--- /dev/null
+++ b/pkg/internal/http/api/webfinger_api.go
@@ -0,0 +1,59 @@
+package api
+
+import (
+	"git.solsynth.dev/hypernet/interactive/pkg/internal/database"
+	"git.solsynth.dev/hypernet/interactive/pkg/internal/models"
+	"git.solsynth.dev/hypernet/interactive/pkg/internal/services"
+	"github.com/gofiber/fiber/v2"
+)
+
+type WebFingerResponse struct {
+	Subject string   `json:"subject"`
+	Aliases []string `json:"aliases"`
+	Links   []struct {
+		Rel  string `json:"rel"`
+		Type string `json:"type,omitempty"`
+		Href string `json:"href"`
+	} `json:"links"`
+}
+
+// Although this webfinger is desgined for users
+// But in this case we will provide publisher for them
+func getWebfinger(c *fiber.Ctx) error {
+	resource := c.Query("resource")
+
+	if len(resource) < 6 || resource[:5] != "acct:" {
+		return c.Status(400).JSON(fiber.Map{"error": "Invalid resource format"})
+	}
+
+	username := resource[5:]
+	if username == "" {
+		return c.Status(400).JSON(fiber.Map{"error": "Invalid username"})
+	}
+
+	var publisher models.Publisher
+	if err := database.C.Where("name = ?", username).First(&publisher).Error; err != nil {
+		return fiber.NewError(fiber.StatusNotFound, err.Error())
+	}
+
+	response := WebFingerResponse{
+		Subject: "acct:" + username,
+		Aliases: []string{
+			services.GetActivityID("/users/" + publisher.Name).String(),
+		},
+		Links: []struct {
+			Rel  string `json:"rel"`
+			Type string `json:"type,omitempty"`
+			Href string `json:"href"`
+		}{
+			{
+				Rel:  "self",
+				Type: "application/activity+json",
+				Href: services.GetActivityID("/users/" + publisher.Name).String(),
+			},
+			// TODO Add avatar here
+		},
+	}
+
+	return c.JSON(response)
+}