feat: change email, export my data, delete account (with data anonymization)

internal/domain/author/authorDeleted.go

@@ -0,0 +1,29 @@
+package author
+
+import "strconv"
+
+const DeletedName = "Deleted user"
+
+const DeletedSlugPrefix = "deleted-user-"
+
+func DeletedSlug(id uint32) string {
+	return DeletedSlugPrefix + strconv.FormatUint(uint64(id), 10)
+}
+
+func DeletedSlugAttempt(id uint32, attempt int) string {
+	if attempt <= 1 {
+		return DeletedSlug(id)
+	}
+	return DeletedSlug(id) + "-" + strconv.Itoa(attempt)
+}
+
+func IsReservedSlug(candidate string) bool {
+	return len(candidate) >= len(DeletedSlugPrefix) && candidate[:len(DeletedSlugPrefix)] == DeletedSlugPrefix
+}
+
+func avoidReserved(candidate string) string {
+	if IsReservedSlug(candidate) {
+		return FallbackSlug + "-" + candidate
+	}
+	return candidate
+}