[feature] Federate interaction policies + Accepts; enforce policies (#3138)

* [feature] Federate interaction policies + Accepts; enforce policies

* use Acceptable type

* fix index

* remove appendIRIStrs

* add GetAccept federatingdb function

* lock on object IRI

1 files changed, 14 insertions, 0 deletions

diff --git a/internal/uris/uri.go b/internal/uris/uri.go
index 335461d84..159508176 100644
--- a/internal/uris/uri.go
+++ b/internal/uris/uri.go
@@ -46,6 +46,7 @@ const (
 	FileserverPath   = "fileserver"    // FileserverPath is a path component for serving attachments + media
 	EmojiPath        = "emoji"         // EmojiPath represents the activitypub emoji location
 	TagsPath         = "tags"          // TagsPath represents the activitypub tags location
+	AcceptsPath      = "accepts"       // AcceptsPath represents the activitypub accepts location
 )
 
 // UserURIs contains a bunch of UserURIs and URLs for a user, host, account, etc.
@@ -136,6 +137,14 @@ func GenerateURIForEmailConfirm(token string) string {
 	return fmt.Sprintf("%s://%s/%s?token=%s", protocol, host, ConfirmEmailPath, token)
 }
 
+// GenerateURIForAccept returns the AP URI for a new accept activity -- something like:
+// https://example.org/users/whatever_user/accepts/01F7XTH1QGBAPMGF49WJZ91XGC
+func GenerateURIForAccept(username string, thisAcceptID string) string {
+	protocol := config.GetProtocol()
+	host := config.GetHost()
+	return fmt.Sprintf("%s://%s/%s/%s/%s/%s", protocol, host, UsersPath, username, AcceptsPath, thisAcceptID)
+}
+
 // GenerateURIsForAccount throws together a bunch of URIs for the given username, with the given protocol and host.
 func GenerateURIsForAccount(username string) *UserURIs {
 	protocol := config.GetProtocol()
@@ -317,6 +326,11 @@ func IsReportPath(id *url.URL) bool {
 	return regexes.ReportPath.MatchString(id.Path)
 }
 
+// IsAcceptsPath returns true if the given URL path corresponds to eg /users/example_username/accepts/SOME_ULID_OF_AN_ACCEPT
+func IsAcceptsPath(id *url.URL) bool {
+	return regexes.AcceptsPath.MatchString(id.Path)
+}
+
 // ParseStatusesPath returns the username and ulid from a path such as /users/example_username/statuses/SOME_ULID_OF_A_STATUS
 func ParseStatusesPath(id *url.URL) (username string, ulid string, err error) {
 	matches := regexes.StatusesPath.FindStringSubmatch(id.Path)