frontend: Added simple 'LOOKUP <type> WHERE <expression>' query.

[sysdb.git] / src / frontend / query.c

diff --git a/src/frontend/query.c b/src/frontend/query.c
index 96c46d28db6f2b3425d90cd1079a363882779983..759b9c9795ebbe86da1c9ab4308c0c641f7e10aa 100644 (file)
--- a/src/frontend/query.c
+++ b/src/frontend/query.c
@@ -34,6 +34,19 @@
 
 #include <errno.h>
 
+/*
+ * private helper functions
+ */
+
+static int
+lookup_tojson(sdb_store_base_t *obj, void *user_data)
+{
+       sdb_strbuf_t *buf = user_data;
+       if (sdb_strbuf_len(buf) > 1)
+               sdb_strbuf_append(buf, ",");
+       return sdb_store_host_tojson(obj, buf, /* flags = */ 0);
+} /* lookup_tojson */
+
 /*
  * public API
  */
@@ -49,6 +62,8 @@ sdb_fe_exec(sdb_conn_t *conn, sdb_conn_node_t *node)
                        return sdb_fe_fetch(conn, CONN_FETCH(node)->name);
                case CONNECTION_LIST:
                        return sdb_fe_list(conn);
+               case CONNECTION_LOOKUP:
+                       return sdb_fe_lookup(conn, CONN_LOOKUP(node)->matcher->matcher);
 
                default:
                        sdb_log(SDB_LOG_ERR, "frontend: Unknown command %i", node->cmd);
@@ -132,5 +147,39 @@ sdb_fe_list(sdb_conn_t *conn)
        return 0;
 } /* sdb_fe_list */
 
+int
+sdb_fe_lookup(sdb_conn_t *conn, sdb_store_matcher_t *m)
+{
+       sdb_strbuf_t *buf;
+
+       buf = sdb_strbuf_create(1024);
+       if (! buf) {
+               char errbuf[1024];
+               sdb_log(SDB_LOG_ERR, "frontend: Failed to create "
+                               "buffer to handle LOOKUP command: %s",
+                               sdb_strerror(errno, errbuf, sizeof(errbuf)));
+
+               sdb_strbuf_sprintf(conn->errbuf, "Out of memory");
+               sdb_strbuf_destroy(buf);
+               return -1;
+       }
+
+       sdb_strbuf_append(buf, "[");
+
+       if (sdb_store_lookup(m, lookup_tojson, buf)) {
+               sdb_log(SDB_LOG_ERR, "frontend: Failed to lookup hosts");
+               sdb_strbuf_sprintf(conn->errbuf, "Failed to lookup hosts");
+               sdb_strbuf_destroy(buf);
+               return -1;
+       }
+
+       sdb_strbuf_append(buf, "]");
+
+       sdb_connection_send(conn, CONNECTION_OK,
+                       (uint32_t)sdb_strbuf_len(buf), sdb_strbuf_string(buf));
+       sdb_strbuf_destroy(buf);
+       return 0;
+} /* sdb_fe_lookup */
+
 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */