src/lib/kdm.cc

   1 /*
   2     Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
   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 <list>
  21 #include <boost/shared_ptr.hpp>
  22 #include <quickmail.h>
  23 #include <zip.h>
  24 #include <dcp/encrypted_kdm.h>
  25 #include "kdm.h"
  26 #include "cinema.h"
  27 #include "exceptions.h"
  28 #include "util.h"
  29 #include "film.h"
  30 #include "config.h"
  31
  32 using std::list;
  33 using std::string;
  34 using std::stringstream;
  35 using boost::shared_ptr;
  36
  37 struct ScreenKDM
  38 {
  39         ScreenKDM (shared_ptr<Screen> s, dcp::EncryptedKDM k)
  40                 : screen (s)
  41                 , kdm (k)
  42         {}
  43
  44         shared_ptr<Screen> screen;
  45         dcp::EncryptedKDM kdm;
  46 };
  47
  48 static string
  49 kdm_filename (shared_ptr<const Film> film, ScreenKDM kdm)
  50 {
  51         return tidy_for_filename (film->name()) + "_" + tidy_for_filename (kdm.screen->cinema->name) + "_" + tidy_for_filename (kdm.screen->name) + ".kdm.xml";
  52 }
  53
  54 struct CinemaKDMs
  55 {
  56         shared_ptr<Cinema> cinema;
  57         list<ScreenKDM> screen_kdms;
  58
  59         void make_zip_file (shared_ptr<const Film> film, boost::filesystem::path zip_file) const
  60         {
  61                 int error;
  62                 struct zip* zip = zip_open (zip_file.string().c_str(), ZIP_CREATE | ZIP_EXCL, &error);
  63                 if (!zip) {
  64                         if (error == ZIP_ER_EXISTS) {
  65                                 throw FileError ("ZIP file already exists", zip_file);
  66                         }
  67                         throw FileError ("could not create ZIP file", zip_file);
  68                 }
  69
  70                 list<shared_ptr<string> > kdm_strings;
  71
  72                 for (list<ScreenKDM>::const_iterator i = screen_kdms.begin(); i != screen_kdms.end(); ++i) {
  73                         shared_ptr<string> kdm (new string (i->kdm.as_xml ()));
  74                         kdm_strings.push_back (kdm);
  75
  76                         struct zip_source* source = zip_source_buffer (zip, kdm->c_str(), kdm->length(), 0);
  77                         if (!source) {
  78                                 throw StringError ("could not create ZIP source");
  79                         }
  80
  81                         if (zip_add (zip, kdm_filename (film, *i).c_str(), source) == -1) {
  82                                 throw StringError ("failed to add KDM to ZIP archive");
  83                         }
  84                 }
  85
  86                 if (zip_close (zip) == -1) {
  87                         throw StringError ("failed to close ZIP archive");
  88                 }
  89         }
  90 };
  91
  92 /* Not complete but sufficient for our purposes (we're using
  93    ScreenKDM in a list where all the screens will be unique).
  94 */
  95 bool
  96 operator== (ScreenKDM const & a, ScreenKDM const & b)
  97 {
  98         return a.screen == b.screen;
  99 }
 100
 101 static list<ScreenKDM>
 102 make_screen_kdms (
 103         shared_ptr<const Film> film,
 104         list<shared_ptr<Screen> > screens,
 105         boost::filesystem::path dcp,
 106         dcp::LocalTime from,
 107         dcp::LocalTime to
 108         )
 109 {
 110         list<dcp::EncryptedKDM> kdms = film->make_kdms (screens, dcp, from, to);
 111
 112         list<ScreenKDM> screen_kdms;
 113
 114         list<shared_ptr<Screen> >::iterator i = screens.begin ();
 115         list<dcp::EncryptedKDM>::iterator j = kdms.begin ();
 116         while (i != screens.end() && j != kdms.end ()) {
 117                 screen_kdms.push_back (ScreenKDM (*i, *j));
 118                 ++i;
 119                 ++j;
 120         }
 121
 122         return screen_kdms;
 123 }
 124
 125 static list<CinemaKDMs>
 126 make_cinema_kdms (
 127         shared_ptr<const Film> film,
 128         list<shared_ptr<Screen> > screens,
 129         boost::filesystem::path dcp,
 130         dcp::LocalTime from,
 131         dcp::LocalTime to
 132         )
 133 {
 134         list<ScreenKDM> screen_kdms = make_screen_kdms (film, screens, dcp, from, to);
 135         list<CinemaKDMs> cinema_kdms;
 136
 137         while (!screen_kdms.empty ()) {
 138
 139                 /* Get all the screens from a single cinema */
 140
 141                 CinemaKDMs ck;
 142
 143                 list<ScreenKDM>::iterator i = screen_kdms.begin ();
 144                 ck.cinema = i->screen->cinema;
 145                 ck.screen_kdms.push_back (*i);
 146                 list<ScreenKDM>::iterator j = i;
 147                 ++i;
 148                 screen_kdms.remove (*j);
 149
 150                 while (i != screen_kdms.end ()) {
 151                         if (i->screen->cinema == ck.cinema) {
 152                                 ck.screen_kdms.push_back (*i);
 153                                 list<ScreenKDM>::iterator j = i;
 154                                 ++i;
 155                                 screen_kdms.remove (*j);
 156                         } else {
 157                                 ++i;
 158                         }
 159                 }
 160
 161                 cinema_kdms.push_back (ck);
 162         }
 163
 164         return cinema_kdms;
 165 }
 166
 167 void
 168 write_kdm_files (
 169         shared_ptr<const Film> film,
 170         list<shared_ptr<Screen> > screens,
 171         boost::filesystem::path dcp,
 172         dcp::LocalTime from,
 173         dcp::LocalTime to,
 174         boost::filesystem::path directory
 175         )
 176 {
 177         list<ScreenKDM> screen_kdms = make_screen_kdms (film, screens, dcp, from, to);
 178
 179         /* Write KDMs to the specified directory */
 180         for (list<ScreenKDM>::iterator i = screen_kdms.begin(); i != screen_kdms.end(); ++i) {
 181                 boost::filesystem::path out = directory;
 182                 out /= kdm_filename (film, *i);
 183                 i->kdm.as_xml (out);
 184         }
 185 }
 186
 187 void
 188 write_kdm_zip_files (
 189         shared_ptr<const Film> film,
 190         list<shared_ptr<Screen> > screens,
 191         boost::filesystem::path dcp,
 192         dcp::LocalTime from,
 193         dcp::LocalTime to,
 194         boost::filesystem::path directory
 195         )
 196 {
 197         list<CinemaKDMs> cinema_kdms = make_cinema_kdms (film, screens, dcp, from, to);
 198
 199         for (list<CinemaKDMs>::const_iterator i = cinema_kdms.begin(); i != cinema_kdms.end(); ++i) {
 200                 boost::filesystem::path path = directory;
 201                 path /= tidy_for_filename (i->cinema->name) + ".zip";
 202                 i->make_zip_file (film, path);
 203         }
 204 }
 205
 206 void
 207 email_kdms (
 208         shared_ptr<const Film> film,
 209         list<shared_ptr<Screen> > screens,
 210         boost::filesystem::path dcp,
 211         dcp::LocalTime from,
 212         dcp::LocalTime to
 213         )
 214 {
 215         list<CinemaKDMs> cinema_kdms = make_cinema_kdms (film, screens, dcp, from, to);
 216
 217         for (list<CinemaKDMs>::const_iterator i = cinema_kdms.begin(); i != cinema_kdms.end(); ++i) {
 218
 219                 boost::filesystem::path zip_file = boost::filesystem::temp_directory_path ();
 220                 zip_file /= boost::filesystem::unique_path().string() + ".zip";
 221                 i->make_zip_file (film, zip_file);
 222
 223                 /* Send email */
 224
 225                 quickmail_initialize ();
 226                 quickmail mail = quickmail_create (Config::instance()->kdm_from().c_str(), "KDM delivery");
 227                 quickmail_add_to (mail, i->cinema->email.c_str ());
 228
 229                 string body = Config::instance()->kdm_email().c_str();
 230                 boost::algorithm::replace_all (body, "$CPL_NAME", film->dcp_name ());
 231                 stringstream start;
 232                 start << from.date() << " " << from.time_of_day();
 233                 boost::algorithm::replace_all (body, "$START_TIME", start.str ());
 234                 stringstream end;
 235                 end << to.date() << " " << to.time_of_day();
 236                 boost::algorithm::replace_all (body, "$END_TIME", end.str ());
 237
 238                 quickmail_set_body (mail, body.c_str());
 239                 quickmail_add_attachment_file (mail, zip_file.string().c_str(), "application/zip");
 240
 241                 int const port = Config::instance()->mail_user().empty() ? 25 : 587;
 242
 243                 char const* error = quickmail_send (
 244                         mail,
 245                         Config::instance()->mail_server().c_str(),
 246                         port,
 247                         Config::instance()->mail_user().c_str(),
 248                         Config::instance()->mail_password().c_str()
 249                         );
 250
 251                 if (error) {
 252                         quickmail_destroy (mail);
 253                         throw KDMError (String::compose ("Failed to send KDM email (%1)", error));
 254                 }
 255                 quickmail_destroy (mail);
 256         }
 257 }