1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
/*
* Copyright 2003-2017 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "Count.hxx"
#include "Selection.hxx"
#include "Interface.hxx"
#include "Partition.hxx"
#include "client/Response.hxx"
#include "song/LightSong.hxx"
#include "tag/Tag.hxx"
#include "tag/VisitFallback.hxx"
#include "TagPrint.hxx"
#include <functional>
#include <map>
struct SearchStats {
unsigned n_songs;
std::chrono::duration<std::uint64_t, SongTime::period> total_duration;
constexpr SearchStats()
:n_songs(0), total_duration(0) {}
};
class TagCountMap : public std::map<std::string, SearchStats> {
};
static void
PrintSearchStats(Response &r, const SearchStats &stats) noexcept
{
unsigned total_duration_s =
std::chrono::duration_cast<std::chrono::seconds>(stats.total_duration).count();
r.Format("songs: %u\n"
"playtime: %u\n",
stats.n_songs, total_duration_s);
}
static void
Print(Response &r, TagType group, const TagCountMap &m) noexcept
{
assert(unsigned(group) < TAG_NUM_OF_ITEM_TYPES);
for (const auto &i : m) {
tag_print(r, group, i.first.c_str());
PrintSearchStats(r, i.second);
}
}
static void
stats_visitor_song(SearchStats &stats, const LightSong &song) noexcept
{
stats.n_songs++;
const auto duration = song.GetDuration();
if (!duration.IsNegative())
stats.total_duration += duration;
}
static void
CollectGroupCounts(TagCountMap &map, const Tag &tag,
const char *value) noexcept
{
auto r = map.insert(std::make_pair(value, SearchStats()));
SearchStats &s = r.first->second;
++s.n_songs;
if (!tag.duration.IsNegative())
s.total_duration += tag.duration;
}
static void
GroupCountVisitor(TagCountMap &map, TagType group,
const LightSong &song) noexcept
{
const Tag &tag = song.tag;
VisitTagWithFallbackOrEmpty(tag, group,
std::bind(CollectGroupCounts, std::ref(map),
std::cref(tag),
std::placeholders::_1));
}
void
PrintSongCount(Response &r, const Partition &partition, const char *name,
const SongFilter *filter,
TagType group)
{
const Database &db = partition.GetDatabaseOrThrow();
const DatabaseSelection selection(name, true, filter);
if (group == TAG_NUM_OF_ITEM_TYPES) {
/* no grouping */
SearchStats stats;
using namespace std::placeholders;
const auto f = std::bind(stats_visitor_song, std::ref(stats),
_1);
db.Visit(selection, f);
PrintSearchStats(r, stats);
} else {
/* group by the specified tag: store counts in a
std::map */
TagCountMap map;
using namespace std::placeholders;
const auto f = std::bind(GroupCountVisitor, std::ref(map),
group, _1);
db.Visit(selection, f);
Print(r, group, map);
}
}
|
