chore(api): reorganize handlers into webserver package

webserver/handlers/remoteFollow.go

@@ -0,0 +1,66 @@
+package handlers
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"net/url"
+	"strings"
+
+	"github.com/owncast/owncast/activitypub/webfinger"
+	"github.com/owncast/owncast/core/data"
+	webutils "github.com/owncast/owncast/webserver/utils"
+)
+
+// RemoteFollow handles a request to begin the remote follow redirect flow.
+func RemoteFollow(w http.ResponseWriter, r *http.Request) {
+	type followRequest struct {
+		Account string `json:"account"`
+	}
+
+	type followResponse struct {
+		RedirectURL string `json:"redirectUrl"`
+	}
+
+	var request followRequest
+	decoder := json.NewDecoder(r.Body)
+	if err := decoder.Decode(&request); err != nil {
+		webutils.WriteSimpleResponse(w, false, "unable to parse request")
+		return
+	}
+
+	if request.Account == "" {
+		webutils.WriteSimpleResponse(w, false, "Remote Fediverse account is required to follow.")
+		return
+	}
+
+	localActorPath, _ := url.Parse(data.GetServerURL())
+	localActorPath.Path = fmt.Sprintf("/federation/user/%s", data.GetDefaultFederationUsername())
+	var template string
+	links, err := webfinger.GetWebfingerLinks(request.Account)
+	if err != nil {
+		webutils.WriteSimpleResponse(w, false, err.Error())
+		return
+	}
+
+	// Acquire the remote follow redirect template.
+	for _, link := range links {
+		for k, v := range link {
+			if k == "rel" && v == "http://ostatus.org/schema/1.0/subscribe" && link["template"] != nil {
+				template = link["template"].(string)
+			}
+		}
+	}
+
+	if localActorPath.String() == "" || template == "" {
+		webutils.WriteSimpleResponse(w, false, "unable to determine remote follow information for "+request.Account)
+		return
+	}
+
+	redirectURL := strings.Replace(template, "{uri}", localActorPath.String(), 1)
+	response := followResponse{
+		RedirectURL: redirectURL,
+	}
+
+	webutils.WriteResponse(w, response)
+}