vcs.maemo.org Git - maevies/blob - src/mvs-minfo-provider.c

   1 /*
   2  * mvs-minfo-provider.c
   3  *
   4  * This file is part of maevies
   5  * Copyright (C) 2010 Simón Pena <spenap@gmail.com>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  */
  18
  19 #include "mvs-minfo-provider.h"
  20
  21 #include <libxml/parser.h>
  22 #include <libxml/xpath.h>
  23 #include <json-glib/json-glib.h>
  24
  25 #include "mvs-tmdb-movie.h"
  26 #include "mvs-watc-movie.h"
  27
  28 #define TMDB_API_KEY "249e1a42df9bee09fac5e92d3a51396b"
  29 #define TMDB_LANGUAGE "en"
  30 #define TMDB_FORMAT "xml"
  31 #define TMDB_METHOD "Movie.search"
  32 #define TMDB_BASE_URL "http://api.themoviedb.org/2.1/%s/%s/%s/%s/%s"
  33 #define TMDB_MOVIE_XPATH "/OpenSearchDescription/movies/movie"
  34
  35 #define WATC_BASE_URL "http://whatsafterthecredits.com/api.php?action=%s&format=%s&search=%s"
  36 #define WATC_ACTION "opensearch"
  37 #define WATC_FORMAT "json"
  38
  39 G_DEFINE_TYPE (MvsMInfoProvider, mvs_minfo_provider, G_TYPE_OBJECT)
  40
  41 enum {
  42         PROP_0,
  43         PROP_FORMAT,
  44 };
  45
  46 #define GET_PRIVATE(o) \
  47   (G_TYPE_INSTANCE_GET_PRIVATE ((o), MVS_TYPE_MINFO_PROVIDER, MvsMInfoProviderPrivate))
  48
  49 struct _MvsMInfoProviderPrivate {
  50         gchar *format;
  51         MvsService service;
  52 };
  53
  54 enum {
  55         RESPONSE_RECEIVED,
  56         LAST_SIGNAL
  57 };
  58
  59 static guint
  60 signals[LAST_SIGNAL] = { 0 };
  61
  62
  63 static void
  64 mvs_minfo_provider_get_property (GObject *object, guint property_id,
  65                          GValue *value, GParamSpec *pspec)
  66 {
  67         MvsMInfoProvider *self = MVS_MINFO_PROVIDER (object);
  68
  69         switch (property_id) {
  70         case PROP_FORMAT:
  71                 g_value_set_string (value, self->priv->format);
  72                 break;
  73         default:
  74                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
  75         }
  76 }
  77
  78 static void
  79 mvs_minfo_provider_set_property (GObject *object, guint property_id,
  80                          const GValue *value, GParamSpec *pspec)
  81 {
  82         MvsMInfoProvider *self = MVS_MINFO_PROVIDER (object);
  83
  84         switch (property_id) {
  85         case PROP_FORMAT:
  86                 mvs_minfo_provider_set_format (self,
  87                                 g_value_get_string (value));
  88                 break;
  89         default:
  90                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
  91         }
  92 }
  93
  94 static void
  95 mvs_minfo_provider_finalize (GObject *object)
  96 {
  97         MvsMInfoProvider *self = MVS_MINFO_PROVIDER (object);
  98
  99         g_free (self->priv->format);
 100
 101         G_OBJECT_CLASS (mvs_minfo_provider_parent_class)->finalize (object);
 102 }
 103
 104 static void
 105 mvs_minfo_provider_class_init (MvsMInfoProviderClass *klass)
 106 {
 107         GObjectClass *object_class = G_OBJECT_CLASS (klass);
 108
 109         g_type_class_add_private (klass, sizeof (MvsMInfoProviderPrivate));
 110
 111         object_class->get_property = mvs_minfo_provider_get_property;
 112         object_class->set_property = mvs_minfo_provider_set_property;
 113         object_class->finalize = mvs_minfo_provider_finalize;
 114
 115         g_object_class_install_property
 116                 (object_class, PROP_FORMAT,
 117                  g_param_spec_string ("format", "The format", "The format",
 118                                       TMDB_FORMAT,
 119                                       G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
 120
 121         signals[RESPONSE_RECEIVED] = g_signal_new ("response-received", MVS_TYPE_MINFO_PROVIDER,
 122                         G_SIGNAL_RUN_LAST | G_SIGNAL_NO_RECURSE | G_SIGNAL_NO_HOOKS,
 123                         0,
 124                         NULL,
 125                         NULL,
 126                         g_cclosure_marshal_VOID__POINTER,
 127                         G_TYPE_NONE,
 128                         1,
 129                         G_TYPE_POINTER);
 130 }
 131
 132 static void
 133 mvs_minfo_provider_init (MvsMInfoProvider *self)
 134 {
 135         self->priv = GET_PRIVATE (self);
 136         self->priv->format = NULL;
 137         self->priv->service = MVS_SERVICE_TMDB;
 138 }
 139
 140 MvsMInfoProvider*
 141 mvs_minfo_provider_new (void)
 142 {
 143         return g_object_new (MVS_TYPE_MINFO_PROVIDER, NULL);
 144 }
 145
 146 static MvsTmdbMovie*
 147 create_tmdb_movie (xmlNodePtr node)
 148 {
 149         xmlNodePtr cur_node = NULL;
 150         MvsTmdbMovie *movie_info = mvs_tmdb_movie_new ();
 151
 152         /* We use the loop to append each property to the movie object */
 153         for (cur_node = node; cur_node; cur_node = cur_node->next) {
 154                 if (cur_node->type == XML_ELEMENT_NODE) {
 155                         const gchar *value = xmlNodeGetContent (cur_node);
 156
 157                         g_object_set (movie_info, cur_node->name, value, NULL);
 158                 }
 159         }
 160         return movie_info;
 161 }
 162
 163 static GList*
 164 generate_list (xmlNodeSetPtr node_set)
 165 {
 166         int i = 0;
 167         GList *list = NULL;
 168
 169         for (i = 0; i < node_set->nodeNr; i++) {
 170                 xmlNodePtr node = node_set->nodeTab[i];
 171                 if (node->type == XML_ELEMENT_NODE) {
 172                         MvsTmdbMovie *movie_info =
 173                                         create_tmdb_movie (node->children);
 174                         if (movie_info)
 175                                 list = g_list_prepend (list, movie_info);
 176                 }
 177         }
 178
 179         if (list)
 180                 list = g_list_reverse (list);
 181
 182         return list;
 183 }
 184
 185 static GList*
 186 parse_xml (const char *xml_data, goffset length)
 187 {
 188         GList *list = NULL;
 189         xmlDocPtr document = xmlReadMemory (xml_data, length,
 190                         NULL,
 191                         NULL,
 192                         XML_PARSE_NOBLANKS | XML_PARSE_RECOVER);
 193         g_return_if_fail (document);
 194
 195         xmlXPathContextPtr context_ptr = xmlXPathNewContext (document);
 196
 197         xmlXPathObjectPtr xpath_obj =
 198                         xmlXPathEvalExpression (TMDB_MOVIE_XPATH, context_ptr);
 199
 200         xmlNodeSetPtr nodeset = xpath_obj->nodesetval;
 201
 202         if (nodeset->nodeNr > 0) {
 203                 list = generate_list (nodeset);
 204         }
 205
 206         xmlXPathFreeNodeSetList (xpath_obj);
 207         xmlXPathFreeContext (context_ptr);
 208         xmlFreeDoc (document);
 209
 210         return list;
 211 }
 212
 213 static GList *
 214 parse_json (const char *json_data, goffset length)
 215 {
 216         JsonParser *parser = NULL;
 217         JsonNode *root = NULL;
 218         GError *error = NULL;
 219         GList *list = NULL;
 220
 221         parser = json_parser_new ();
 222
 223         json_parser_load_from_data (parser, json_data, length, &error);
 224         if (error)
 225         {
 226                 g_warning ("Unable to parse data '%s': %s\n",
 227                                 json_data, error->message);
 228                 g_error_free (error);
 229                 g_object_unref (parser);
 230                 return list;
 231         }
 232
 233         /* Don't free */
 234         root = json_parser_get_root (parser);
 235         JsonArray *response = json_node_get_array (root);
 236
 237         /* The response is expected with the following format:
 238          * [ SEARCH_TERM ,[ SEARCH_RESULT_1, SEARCH_RESULT_N]] */
 239
 240         if (json_array_get_length (response) != 2) {
 241
 242                 g_warning ("Wrong response format: %s\n", json_data);
 243
 244                 g_object_unref (parser);
 245                 return list;
 246         }
 247
 248         const gchar *search_term = json_array_get_string_element (response, 0);
 249         g_message ("Searched for: %s\n", search_term);
 250
 251         JsonArray *results = json_array_get_array_element (response, 1);
 252         int i;
 253         int array_length = json_array_get_length (results);
 254
 255         for (i = 0; i < array_length; i++) {
 256                 const gchar *result =
 257                                 json_array_get_string_element (results, i);
 258                 MvsWatcMovie *watc_movie = mvs_watc_movie_new (result);
 259                 list = g_list_prepend (list, watc_movie);
 260         }
 261
 262         g_object_unref (parser);
 263
 264         if (list)
 265                 list = g_list_reverse (list);
 266
 267         return list;
 268 }
 269
 270 static void
 271 process_response_cb (SoupSession *session, SoupMessage *message,
 272                     gpointer user_data)
 273 {
 274         MvsMInfoProvider *self = MVS_MINFO_PROVIDER (user_data);
 275         const gchar *mime = NULL;
 276         GList *list = NULL;
 277
 278         if (!SOUP_STATUS_IS_SUCCESSFUL (message->status_code) ||
 279                         message->response_body->length <= 0) {
 280
 281                 g_print ("%s\n", message->reason_phrase);
 282         }
 283         else {
 284
 285                 mime = soup_message_headers_get_content_type
 286                                 (message->response_headers, NULL);
 287                 g_message ("Mime type: %s\n", mime);
 288
 289                 if (g_strcmp0 (mime, "text/xml") == 0)
 290                         list = parse_xml (message->response_body->data,
 291                                         message->response_body->length);
 292                 else if (g_strcmp0 (mime, "application/json") == 0)
 293                         list = parse_json (message->response_body->data,
 294                                         message->response_body->length);
 295         }
 296
 297         g_signal_emit (self, signals[RESPONSE_RECEIVED], 0, list);
 298
 299         g_list_free (list);
 300 }
 301
 302 static gchar *
 303 get_query_uri (MvsMInfoProvider *self, const char *query)
 304 {
 305         gchar *uri = NULL;
 306
 307         if (self->priv->service == MVS_SERVICE_TMDB) {
 308                 /* METHOD/LANGUAGE/FORMAT/APIKEY/MOVIENAME */
 309                 uri = g_strdup_printf (TMDB_BASE_URL, TMDB_METHOD,
 310                                 TMDB_LANGUAGE,
 311                                 self->priv->format,
 312                                 TMDB_API_KEY,
 313                                 query);
 314
 315         }
 316         else if (self->priv->service == MVS_SERVICE_WATC) {
 317                 /* WATCBASE_URL/ACTION/FORMAT/QUERY */
 318                 uri = g_strdup_printf (WATC_BASE_URL,
 319                                 WATC_ACTION,
 320                                 WATC_FORMAT,
 321                                 query);
 322         }
 323         else {
 324                 g_warning ("Service unsupported\n");
 325         }
 326
 327         return uri;
 328 }
 329
 330 gboolean
 331 mvs_minfo_provider_query (MvsMInfoProvider *self, MvsService service,
 332                           const gchar *query)
 333 {
 334         g_return_val_if_fail (MVS_IS_MINFO_PROVIDER (self), FALSE);
 335
 336         self->priv->service = service;
 337
 338         SoupSession *session = NULL;
 339         SoupMessage *message = NULL;
 340         gboolean message_queued = FALSE;
 341
 342         gchar *uri = get_query_uri (self, query);
 343
 344         g_return_val_if_fail (uri, FALSE);
 345
 346         session = soup_session_async_new ();
 347         message = soup_message_new ("GET", uri);
 348
 349         if (message) {
 350                 soup_session_queue_message (session, message,
 351                                 process_response_cb, self);
 352                 message_queued = TRUE;
 353         }
 354
 355         g_free (uri);
 356
 357         return message_queued;
 358 }
 359
 360 gboolean
 361 mvs_minfo_provider_set_format (MvsMInfoProvider *self,
 362                                const gchar *format)
 363 {
 364         g_return_val_if_fail (MVS_IS_MINFO_PROVIDER (self), FALSE);
 365
 366         g_free (self->priv->format);
 367
 368         self->priv->format = g_strdup (format);
 369
 370         return TRUE;
 371 }