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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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28
src/db/plugins/upnp/UpnpDatabasePlugin.cxx
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@@ -254,9 +254,9 @@ UpnpDatabase::SearchSongs(const ContentDirectoryService &server,
std::string cond;
for (const auto &item : filter->GetItems()) {
switch (auto tag = item.GetTag()) {
case LOCATE_TAG_ANY_TYPE:
{
if (auto t = dynamic_cast<const TagSongFilter *>(item.get())) {
auto tag = t->GetTagType();
if (tag == TAG_NUM_OF_ITEM_TYPES) {
if (!cond.empty()) {
cond += " and ";
}
@@ -268,29 +268,21 @@ UpnpDatabase::SearchSongs(const ContentDirectoryService &server,
else
cond += " or ";
cond += cap;
if (item.GetFoldCase()) {
if (t->GetFoldCase()) {
cond += " contains ";
} else {
cond += " = ";
}
dquote(cond, item.GetValue());
dquote(cond, t->GetValue().c_str());
}
cond += ')';
continue;
}
break;
default:
/* Unhandled conditions like
LOCATE_TAG_BASE_TYPE or
LOCATE_TAG_FILE_TYPE won't have a
corresponding upnp prop, so they will be
skipped */
if (tag == TAG_ALBUM_ARTIST)
tag = TAG_ARTIST;
// TODO: support LOCATE_TAG_ANY_TYPE etc.
const char *name = tag_table_lookup(upnp_tags,
TagType(tag));
const char *name = tag_table_lookup(upnp_tags, tag);
if (name == nullptr)
continue;
@@ -304,13 +296,15 @@ UpnpDatabase::SearchSongs(const ContentDirectoryService &server,
case-insensitive, but at least some servers
have the same convention as mpd (e.g.:
minidlna) */
if (item.GetFoldCase()) {
if (t->GetFoldCase()) {
cond += " contains ";
} else {
cond += " = ";
}
dquote(cond, item.GetValue());
dquote(cond, t->GetValue().c_str());
}
// TODO: support other ISongFilter implementations
}
return server.search(handle, objid, cond.c_str());