libs/ardour/audio_library.cc

   1 /*
   2     Copyright (C) 2003-2006 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include <sstream>
  21
  22 #include <libxml/uri.h>
  23
  24 #include <lrdf.h>
  25 #include <glibmm/miscutils.h>
  26
  27 #include <glibmm/convert.h>
  28
  29 #include "pbd/compose.h"
  30
  31 #include "ardour/audio_library.h"
  32 #include "ardour/utils.h"
  33 #include "ardour/filesystem_paths.h"
  34
  35 #include "i18n.h"
  36
  37 using namespace std;
  38 using namespace PBD;
  39 using namespace ARDOUR;
  40
  41 namespace {
  42         const char* const sfdb_file_name = "sfdb";
  43 } // anonymous namespace
  44
  45 static const char* TAG = "http://ardour.org/ontology/Tag";
  46
  47 AudioLibrary::AudioLibrary ()
  48 {
  49         sys::path sfdb_file_path(user_config_directory ());
  50
  51         sfdb_file_path /= sfdb_file_name;
  52
  53         src = Glib::filename_to_uri (sfdb_file_path.to_string ());
  54
  55         // workaround for possible bug in raptor that crashes when saving to a
  56         // non-existant file.
  57
  58         touch_file(sfdb_file_path.to_string());
  59
  60         lrdf_read_file(src.c_str());
  61 }
  62
  63 AudioLibrary::~AudioLibrary ()
  64 {
  65 }
  66
  67 void
  68 AudioLibrary::save_changes ()
  69 {
  70         if (lrdf_export_by_source(src.c_str(), src.substr(5).c_str())) {
  71                 PBD::warning << string_compose(_("Could not open %1.  Audio Library not saved"), src) << endmsg;
  72         }
  73 }
  74
  75 void
  76 AudioLibrary::set_tags (string member, vector<string> tags)
  77 {
  78         sort (tags.begin(), tags.end());
  79         tags.erase (unique(tags.begin(), tags.end()), tags.end());
  80
  81         const string file_uri(Glib::filename_to_uri (member));
  82
  83         lrdf_remove_uri_matches (file_uri.c_str());
  84
  85         for (vector<string>::iterator i = tags.begin(); i != tags.end(); ++i) {
  86                 lrdf_add_triple (src.c_str(), file_uri.c_str(), TAG, (*i).c_str(), lrdf_literal);
  87         }
  88 }
  89
  90 vector<string>
  91 AudioLibrary::get_tags (string member)
  92 {
  93         vector<string> tags;
  94
  95         lrdf_statement pattern;
  96         pattern.subject = strdup(Glib::filename_to_uri(member).c_str());
  97         pattern.predicate = (char*)TAG;
  98         pattern.object = 0;
  99         pattern.object_type = lrdf_literal;
 100
 101         lrdf_statement* matches = lrdf_matches (&pattern);
 102         free (pattern.subject);
 103
 104         lrdf_statement* current = matches;
 105         while (current != 0) {
 106                 tags.push_back (current->object);
 107
 108                 current = current->next;
 109         }
 110
 111         lrdf_free_statements (matches);
 112
 113         sort (tags.begin(), tags.end());
 114
 115         return tags;
 116 }
 117
 118 void
 119 AudioLibrary::search_members_and (vector<string>& members, const vector<string>& tags)
 120 {
 121         lrdf_statement **head;
 122         lrdf_statement* pattern = 0;
 123         lrdf_statement* old = 0;
 124         head = &pattern;
 125
 126         vector<string>::const_iterator i;
 127         for (i = tags.begin(); i != tags.end(); ++i){
 128                 pattern = new lrdf_statement;
 129                 pattern->subject = (char*)"?";
 130                 pattern->predicate = (char*)TAG;
 131                 pattern->object = strdup((*i).c_str());
 132                 pattern->next = old;
 133
 134                 old = pattern;
 135         }
 136
 137         if (*head != 0) {
 138                 lrdf_uris* ulist = lrdf_match_multi(*head);
 139                 for (uint32_t j = 0; ulist && j < ulist->count; ++j) {
 140                         members.push_back(Glib::filename_from_uri(ulist->items[j]));
 141                 }
 142                 lrdf_free_uris(ulist);
 143
 144             sort(members.begin(), members.end());
 145             unique(members.begin(), members.end());
 146         }
 147
 148         // memory clean up
 149         pattern = *head;
 150         while(pattern){
 151                 free(pattern->object);
 152                 old = pattern;
 153                 pattern = pattern->next;
 154                 delete old;
 155         }
 156 }