Fix instance-wide actor lookup

This skips the silenced-user check.

Ref T820

activitypub.go

@@ -17,7 +17,6 @@ import (
 	"encoding/base64"
 	"encoding/json"
 	"fmt"
-	"github.com/writeas/writefreely/config"
 	"io/ioutil"
 	"net/http"
 	"net/http/httputil"
@@ -109,16 +108,19 @@ func handleFetchCollectionActivities(app *App, w http.ResponseWriter, r *http.Re
 	if err != nil {
 		return err
 	}
-	silenced, err := app.db.IsUserSilenced(c.OwnerID)
-	if err != nil {
-		log.Error("fetch collection activities: %v", err)
-		return ErrInternalGeneral
-	}
-	if silenced {
-		return ErrCollectionNotFound
-	}
 	c.hostName = app.cfg.App.Host
 
+	if !c.IsInstanceColl() {
+		silenced, err := app.db.IsUserSilenced(c.OwnerID)
+		if err != nil {
+			log.Error("fetch collection activities: %v", err)
+			return ErrInternalGeneral
+		}
+		if silenced {
+			return ErrCollectionNotFound
+		}
+	}
+
 	p := c.PersonObject()
 
 	setCacheControl(w, apCacheTime)

collections.go

@@ -1,5 +1,5 @@
 /*
- * Copyright © 2018-2020 A Bunch Tell LLC.
+ * Copyright © 2018-2021 A Bunch Tell LLC.
  *
  * This file is part of WriteFreely.
  *
@@ -180,6 +180,11 @@ func (c *Collection) NewFormat() *CollectionFormat {
 	return cf
 }
 
+func (c *Collection) IsInstanceColl() bool {
+	ur, _ := url.Parse(c.hostName)
+	return c.Alias == ur.Host
+}
+
 func (c *Collection) IsUnlisted() bool {
 	return c.Visibility == 0
 }