[PATCH 5/9] lib: setup user headers in query parser

These tests will need to be updated if the Xapian
query print/debug format changes.
---
 lib/database.cc          | 35 +++++++++++++++++++++++++++++++++++
 test/T730-user-header.sh | 21 +++++++++++++++++++++
 2 files changed, 56 insertions(+)

diff --git a/lib/database.cc b/lib/database.cc
index 9cf8062c..4de79f79 100644
--- a/lib/database.cc
+++ b/lib/database.cc
@@ -299,6 +299,8 @@ prefix_t prefix_table[] = {
                                                NOTMUCH_FIELD_PROCESSOR},
 };
 
+#define CONFIG_HEADER_PREFIX "index.header."
+
 static void
 _setup_query_field_default (const prefix_t *prefix, notmuch_database_t 
*notmuch)
 {
@@ -308,6 +310,38 @@ _setup_query_field_default (const prefix_t *prefix, 
notmuch_database_t *notmuch)
        notmuch->query_parser->add_boolean_prefix (prefix->name, 
prefix->prefix);
 }
 
+static notmuch_status_t
+_setup_user_query_fields (notmuch_database_t *notmuch)
+{
+    notmuch_config_list_t *list;
+    notmuch_status_t status;
+
+    status = notmuch_database_get_config_list (notmuch, CONFIG_HEADER_PREFIX, 
&list);
+    if (status)
+       return status;
+    for (; notmuch_config_list_valid (list); notmuch_config_list_move_to_next 
(list)) {
+
+       prefix_t query_field { .name = NULL, .prefix = NULL,
+               .flags = NOTMUCH_FIELD_PROBABILISTIC |
+                        NOTMUCH_FIELD_EXTERNAL
+               };
+
+       const char *key = notmuch_config_list_key (list)
+           + sizeof (CONFIG_HEADER_PREFIX) - 1;
+
+       char *prefix = talloc_asprintf(notmuch, "XU%s:", key);
+
+       query_field.name = key;
+       query_field.prefix = prefix;
+
+       _setup_query_field_default (&query_field, notmuch);
+    }
+
+    notmuch_config_list_destroy (list);
+
+    return NOTMUCH_STATUS_SUCCESS;
+}
+
 #if HAVE_XAPIAN_FIELD_PROCESSOR
 static void
 _setup_query_field (const prefix_t *prefix, notmuch_database_t *notmuch)
@@ -965,6 +999,7 @@ notmuch_database_open_verbose (const char *path,
                _setup_query_field (prefix, notmuch);
            }
        }
+       status = _setup_user_query_fields (notmuch);
     } catch (const Xapian::Error &error) {
        IGNORE_RESULT (asprintf (&message, "A Xapian exception occurred opening 
database: %s\n",
                                 error.get_msg().c_str()));
diff --git a/test/T730-user-header.sh b/test/T730-user-header.sh
index b97b00b6..2d6cc60b 100755
--- a/test/T730-user-header.sh
+++ b/test/T730-user-header.sh
@@ -70,4 +70,25 @@ index.header.Spam=X-Spam
 EOF
 test_expect_equal_file EXPECTED OUTPUT
 
+test_begin_subtest "parse user prefix"
+NOTMUCH_DEBUG_QUERY=t notmuch count 'List:"notmuch"' 2>&1 | grep Tmail >OUTPUT
+cat <<EOF > EXPECTED
+Query((Tmail AND XUList:notmuch@1))
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "parse user prefix, stemmed"
+NOTMUCH_DEBUG_QUERY=t notmuch count 'List:notmuch' 2>&1 | grep Tmail >OUTPUT
+cat <<EOF > EXPECTED
+Query((Tmail AND ZXUList:notmuch@1))
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "parse user prefix, phrase"
+NOTMUCH_DEBUG_QUERY=t notmuch count 'List:notmuchmail.org' 2>&1 | grep Tmail 
>OUTPUT
+cat <<EOF > EXPECTED
+Query((Tmail AND (XUList:notmuchmail@1 PHRASE 2 XUList:org@2)))
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
 test_done
-- 
2.20.1

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