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 <pbd/compose.h>
  28
  29 #include <ardour/audio_library.h>
  30 #include <ardour/utils.h>
  31
  32 #include "i18n.h"
  33
  34 using namespace std;
  35 using namespace ARDOUR;
  36
  37 static const char* TAG = "http://ardour.org/ontology/Tag";
  38
  39 AudioLibrary::AudioLibrary ()
  40 {
  41         /* XXX URL - '/' is always the separator */
  42
  43         src = "file:" + get_user_ardour_path() + "/sfdb";
  44
  45         // workaround for possible bug in raptor that crashes when saving to a
  46         // non-existant file.
  47
  48         touch_file(Glib::build_filename (get_user_ardour_path(), "sfdb"));
  49
  50         lrdf_read_file(src.c_str());
  51 }
  52
  53 AudioLibrary::~AudioLibrary ()
  54 {
  55 }
  56
  57 void
  58 AudioLibrary::save_changes ()
  59 {
  60         if (lrdf_export_by_source(src.c_str(), src.substr(5).c_str())) {
  61                 PBD::warning << string_compose(_("Could not open %1.  Audio Library not saved"), src) << endmsg;
  62         }
  63 }
  64
  65 string
  66 AudioLibrary::path2uri (string path)
  67 {
  68         xmlURI temp;
  69         memset(&temp, 0, sizeof(temp));
  70
  71         xmlChar *cal = xmlCanonicPath((xmlChar*) path.c_str());
  72         temp.path = (char *) cal;
  73         xmlChar *ret = xmlSaveUri(&temp);
  74         xmlFree(cal);
  75
  76         stringstream uri;
  77         uri << "file:" << (const char*) ret;
  78
  79         xmlFree (ret);
  80
  81         return uri.str();
  82 }
  83
  84 string
  85 AudioLibrary::uri2path (string uri)
  86 {
  87         string path = xmlURIUnescapeString(uri.c_str(), 0, 0);
  88         return path.substr(5);
  89 }
  90
  91 void
  92 AudioLibrary::set_tags (string member, vector<string> tags)
  93 {
  94         sort (tags.begin(), tags.end());
  95         tags.erase (unique(tags.begin(), tags.end()), tags.end());
  96
  97         string file_uri(path2uri(member));
  98
  99         lrdf_remove_uri_matches (file_uri.c_str());
 100
 101         for (vector<string>::iterator i = tags.begin(); i != tags.end(); ++i) {
 102                 lrdf_add_triple (src.c_str(), file_uri.c_str(), TAG, (*i).c_str(), lrdf_literal);
 103         }
 104 }
 105
 106 vector<string>
 107 AudioLibrary::get_tags (string member)
 108 {
 109         vector<string> tags;
 110
 111         lrdf_statement pattern;
 112         pattern.subject = strdup(path2uri(member).c_str());
 113         pattern.predicate = (char*)TAG;
 114         pattern.object = 0;
 115         pattern.object_type = lrdf_literal;
 116
 117         lrdf_statement* matches = lrdf_matches (&pattern);
 118         free (pattern.subject);
 119
 120         lrdf_statement* current = matches;
 121         while (current != 0) {
 122                 tags.push_back (current->object);
 123
 124                 current = current->next;
 125         }
 126
 127         lrdf_free_statements (matches);
 128
 129         sort (tags.begin(), tags.end());
 130
 131         return tags;
 132 }
 133
 134 void
 135 AudioLibrary::search_members_and (vector<string>& members, const vector<string> tags)
 136 {
 137         lrdf_statement **head;
 138         lrdf_statement* pattern = 0;
 139         lrdf_statement* old = 0;
 140         head = &pattern;
 141
 142         vector<string>::const_iterator i;
 143         for (i = tags.begin(); i != tags.end(); ++i){
 144                 pattern = new lrdf_statement;
 145                 pattern->subject = (char*)"?";
 146                 pattern->predicate = (char*)TAG;
 147                 pattern->object = strdup((*i).c_str());
 148                 pattern->next = old;
 149
 150                 old = pattern;
 151         }
 152
 153         if (*head != 0) {
 154                 lrdf_uris* ulist = lrdf_match_multi(*head);
 155                 for (uint32_t j = 0; ulist && j < ulist->count; ++j) {
 156 //                      cerr << "AND: " << uri2path(ulist->items[j]) << endl;
 157                         members.push_back(uri2path(ulist->items[j]));
 158                 }
 159                 lrdf_free_uris(ulist);
 160
 161             sort(members.begin(), members.end());
 162             unique(members.begin(), members.end());
 163         }
 164
 165         // memory clean up
 166         pattern = *head;
 167         while(pattern){
 168                 free(pattern->object);
 169                 old = pattern;
 170                 pattern = pattern->next;
 171                 delete old;
 172         }
 173 }