support payee uuid directive

The semantics of this are a little bit tricky: we want, if we come
across a transaction with exactly the given UUID, to set the
transaction's payee to be the specified one.

We need to set that payee before the first post in the transaction is
parsed, otherwise that post will inherit the wrong payee; however, we
need to do it after the transaction's tags have been parsed.  The
implementation as it is in this commit is potentially a little
wasteful, if there are post-like (non-comment non-assertion) entries
in the transaction that don't successfully parse as posts.

1 files changed, 21 insertions, 0 deletions

diff --git a/src/textual.cc b/src/textual.cc
index 0a590e08..60250007 100644
--- a/src/textual.cc
+++ b/src/textual.cc
@@ -155,6 +155,7 @@ namespace {
 
     void payee_directive(char * line);
     void payee_alias_directive(const string& payee, string alias);
+    void payee_uuid_directive(const string& payee, string uuid);
 
     void commodity_directive(char * line);
     void commodity_alias_directive(commodity_t& comm, string alias);
@@ -1035,6 +1036,8 @@ void instance_t::payee_directive(char * line)
     string keyword(p);
     if (keyword == "alias")
       payee_alias_directive(payee, b);
+    if (keyword == "uuid")
+      payee_uuid_directive(payee, b);
   }
 }
 
@@ -1045,6 +1048,13 @@ void instance_t::payee_alias_directive(const string& payee, string alias)
     .push_back(payee_alias_mapping_t(mask_t(alias), payee));
 }
 
+void instance_t::payee_uuid_directive(const string& payee, string uuid)
+{
+  trim(uuid);
+  context.journal->payee_uuid_mappings
+    .push_back(payee_uuid_mapping_t(uuid, payee));
+}
+
 void instance_t::commodity_directive(char * line)
 {
   char * p = skip_ws(line);
@@ -1862,6 +1872,17 @@ xact_t * instance_t::parse_xact(char *          line,
     else {
       reveal_context = false;
 
+      if (!last_post) {
+        if (xact->has_tag(_("UUID"))) {
+          string uuid = xact->get_tag(_("UUID"))->to_string();
+          foreach (payee_uuid_mapping_t value, context.journal->payee_uuid_mappings) {
+            if (value.first.compare(uuid) == 0) {
+              xact->payee = value.second;
+            }
+          }
+        }
+      }
+
       if (post_t * post =
           parse_post(p, len - (p - line), account, xact.get())) {
         reveal_context = true;