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SongFilter: make Item an interface

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Prepare to allow more complex expressions.
This commit is contained in:
Max Kellermann
2018-07-25 07:58:35 +02:00
parent 438366effc
commit 2cfccc1c34
5 changed files with 301 additions and 191 deletions
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58
src/db/plugins/ProxyDatabasePlugin.cxx
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@@ -268,49 +268,53 @@ CheckError(struct mpd_connection *connection)
}
static bool
SendConstraints(mpd_connection *connection, const SongFilter::Item &item)
SendConstraints(mpd_connection *connection, const ISongFilter &f)
{
switch (item.GetTag()) {
mpd_tag_type tag;
#if LIBMPDCLIENT_CHECK_VERSION(2,9,0)
case LOCATE_TAG_BASE_TYPE:
if (mpd_connection_cmp_server_version(connection, 0, 18, 0) < 0)
/* requires MPD 0.18 */
if (auto t = dynamic_cast<const TagSongFilter *>(&f)) {
if (t->IsNegated())
// TODO implement
return true;
return mpd_search_add_base_constraint(connection,
MPD_OPERATOR_DEFAULT,
item.GetValue());
#endif
if (t->GetTagType() == TAG_NUM_OF_ITEM_TYPES)
return mpd_search_add_any_tag_constraint(connection,
MPD_OPERATOR_DEFAULT,
t->GetValue().c_str());
case LOCATE_TAG_FILE_TYPE:
return mpd_search_add_uri_constraint(connection,
MPD_OPERATOR_DEFAULT,
item.GetValue());
case LOCATE_TAG_ANY_TYPE:
return mpd_search_add_any_tag_constraint(connection,
MPD_OPERATOR_DEFAULT,
item.GetValue());
default:
tag = Convert(TagType(item.GetTag()));
const auto tag = Convert(t->GetTagType());
if (tag == MPD_TAG_COUNT)
return true;
return mpd_search_add_tag_constraint(connection,
MPD_OPERATOR_DEFAULT,
tag,
item.GetValue());
}
t->GetValue().c_str());
} else if (auto u = dynamic_cast<const UriSongFilter *>(&f)) {
if (u->IsNegated())
// TODO implement
return true;
return mpd_search_add_uri_constraint(connection,
MPD_OPERATOR_DEFAULT,
u->GetValue().c_str());
#if LIBMPDCLIENT_CHECK_VERSION(2,9,0)
} else if (auto b = dynamic_cast<const BaseSongFilter *>(&f)) {
if (mpd_connection_cmp_server_version(connection, 0, 18, 0) < 0)
/* requires MPD 0.18 */
return true;
return mpd_search_add_base_constraint(connection,
MPD_OPERATOR_DEFAULT,
b->GetValue());
#endif
} else
return true;
}
static bool
SendConstraints(mpd_connection *connection, const SongFilter &filter)
{
for (const auto &i : filter.GetItems())
if (!SendConstraints(connection, i))
if (!SendConstraints(connection, *i))
return false;
return true;