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db/proxy: forward filter as expression to server

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This adds support for the full set of MPD 0.21 filter types.
This commit is contained in:
Max Kellermann 2018-09-02 22:39:45 +02:00
parent a8e70f0901
commit 0701333ec1
1 changed files with 23 additions and 4 deletions
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27
src/db/plugins/ProxyDatabasePlugin.cxx
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@ -347,6 +347,14 @@ SendConstraints(mpd_connection *connection, const ISongFilter &f)
static bool
SendConstraints(mpd_connection *connection, const SongFilter &filter)
{
#if LIBMPDCLIENT_CHECK_VERSION(2, 15, 0)
if (mpd_connection_cmp_server_version(connection, 0, 21, 0) >= 0)
/* with MPD 0.21 (and libmpdclient 2.15), we can pass
arbitrary filters as expression */
return mpd_search_add_expression(connection,
filter.ToExpression().c_str());
#endif
for (const auto &i : filter.GetItems())
if (!SendConstraints(connection, *i))
return false;
@ -870,8 +878,18 @@ IsFilterSupported(const ISongFilter &f) noexcept
gcc_pure
static bool
IsFilterFullySupported(const SongFilter &filter) noexcept
IsFilterFullySupported(const SongFilter &filter,
const struct mpd_connection *connection) noexcept
{
#if LIBMPDCLIENT_CHECK_VERSION(2, 15, 0)
if (mpd_connection_cmp_server_version(connection, 0, 21, 0) >= 0)
/* with MPD 0.21 (and libmpdclient 2.15), we can pass
arbitrary filters as expression */
return true;
#else
(void)connection;
#endif
for (const auto &i : filter.GetItems())
if (!IsFilterSupported(*i))
return false;
@ -881,10 +899,11 @@ IsFilterFullySupported(const SongFilter &filter) noexcept
gcc_pure
static bool
IsFilterFullySupported(const SongFilter *filter) noexcept
IsFilterFullySupported(const SongFilter *filter,
const struct mpd_connection *connection) noexcept
{
return filter == nullptr ||
IsFilterFullySupported(*filter);
IsFilterFullySupported(*filter, connection);
}
#endif
@ -933,7 +952,7 @@ CheckSelection(DatabaseSelection selection,
#if LIBMPDCLIENT_CHECK_VERSION(2, 10, 0)
if (selection.window != RangeArg::All() &&
IsFilterFullySupported(selection.filter))
IsFilterFullySupported(selection.filter, connection))
/* we can forward the "window" parameter to the other
MPD */
selection.window = RangeArg::All();