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                         gchar *value = xmlNodeGetContent (cur_node);
 156
 157                         g_object_set (movie_info, cur_node->name, value, NULL);
 158                         g_free (value);
 159                 }
 160         }
 161         return movie_info;
 162 }
 163
 164 static GList*
 165 generate_list (xmlNodeSetPtr node_set)
 166 {
 167         int i = 0;
 168         GList *list = NULL;
 169
 170         for (i = 0; i < node_set->nodeNr; i++) {
 171                 xmlNodePtr node = node_set->nodeTab[i];
 172                 if (node->type == XML_ELEMENT_NODE) {
 173                         MvsTmdbMovie *movie_info =
 174                                         create_tmdb_movie (node->children);
 175                         if (movie_info)
 176                                 list = g_list_prepend (list, movie_info);
 177                 }
 178         }
 179
 180         if (list)
 181                 list = g_list_reverse (list);
 182
 183         return list;
 184 }
 185
 186 static GList*
 187 parse_xml (const char *xml_data, goffset length)
 188 {
 189         GList *list = NULL;
 190         xmlDocPtr document = xmlReadMemory (xml_data, length,
 191                         NULL,
 192                         NULL,
 193                         XML_PARSE_NOBLANKS | XML_PARSE_RECOVER);
 194         g_return_if_fail (document);
 195
 196         xmlXPathContextPtr context_ptr = xmlXPathNewContext (document);
 197
 198         xmlXPathObjectPtr xpath_obj =
 199                         xmlXPathEvalExpression (TMDB_MOVIE_XPATH, context_ptr);
 200
 201         xmlNodeSetPtr nodeset = xpath_obj->nodesetval;
 202
 203         if (nodeset->nodeNr > 0) {
 204                 list = generate_list (nodeset);
 205         }
 206
 207         xmlXPathFreeObject (xpath_obj);
 208         xmlXPathFreeContext (context_ptr);
 209         xmlFreeDoc (document);
 210
 211         return list;
 212 }
 213
 214 static GList *
 215 parse_json (const char *json_data, goffset length)
 216 {
 217         JsonParser *parser = NULL;
 218         JsonNode *root = NULL;
 219         GError *error = NULL;
 220         GList *list = NULL;
 221
 222         parser = json_parser_new ();
 223
 224         json_parser_load_from_data (parser, json_data, length, &error);
 225         if (error)
 226         {
 227                 g_warning ("Unable to parse data '%s': %s\n",
 228                                 json_data, error->message);
 229                 g_error_free (error);
 230                 g_object_unref (parser);
 231                 return list;
 232         }
 233
 234         /* Don't free */
 235         root = json_parser_get_root (parser);
 236         JsonArray *response = json_node_get_array (root);
 237
 238         /* The response is expected with the following format:
 239          * [ SEARCH_TERM ,[ SEARCH_RESULT_1, SEARCH_RESULT_N]] */
 240
 241         if (json_array_get_length (response) != 2) {
 242
 243                 g_warning ("Wrong response format: %s\n", json_data);
 244
 245                 g_object_unref (parser);
 246                 return list;
 247         }
 248
 249         const gchar *search_term = json_array_get_string_element (response, 0);
 250         g_message ("Searched for: %s\n", search_term);
 251
 252         JsonArray *results = json_array_get_array_element (response, 1);
 253         int i;
 254         int array_length = json_array_get_length (results);
 255
 256         for (i = 0; i < array_length; i++) {
 257                 const gchar *result =
 258                                 json_array_get_string_element (results, i);
 259                 MvsWatcMovie *watc_movie = mvs_watc_movie_new (result);
 260                 list = g_list_prepend (list, watc_movie);
 261         }
 262
 263         g_object_unref (parser);
 264
 265         if (list)
 266                 list = g_list_reverse (list);
 267
 268         return list;
 269 }
 270
 271 static void
 272 process_response_cb (SoupSession *session, SoupMessage *message,
 273                     gpointer user_data)
 274 {
 275         MvsMInfoProvider *self = MVS_MINFO_PROVIDER (user_data);
 276         const gchar *mime = NULL;
 277         GList *list = NULL;
 278
 279         if (!SOUP_STATUS_IS_SUCCESSFUL (message->status_code) ||
 280                         message->response_body->length <= 0) {
 281
 282                 g_print ("%s\n", message->reason_phrase);
 283         }
 284         else {
 285
 286                 mime = soup_message_headers_get_content_type
 287                                 (message->response_headers, NULL);
 288                 g_message ("Mime type: %s\n", mime);
 289
 290                 if (g_strcmp0 (mime, "text/xml") == 0)
 291                         list = parse_xml (message->response_body->data,
 292                                         message->response_body->length);
 293                 else if (g_strcmp0 (mime, "application/json") == 0)
 294                         list = parse_json (message->response_body->data,
 295                                         message->response_body->length);
 296         }
 297
 298         g_signal_emit (self, signals[RESPONSE_RECEIVED], 0, list);
 299 }
 300
 301 static gchar *
 302 get_query_uri (MvsMInfoProvider *self, const char *query)
 303 {
 304         gchar *uri = NULL;
 305
 306         if (self->priv->service == MVS_SERVICE_TMDB) {
 307                 /* METHOD/LANGUAGE/FORMAT/APIKEY/MOVIENAME */
 308                 uri = g_strdup_printf (TMDB_BASE_URL, TMDB_METHOD,
 309                                 TMDB_LANGUAGE,
 310                                 self->priv->format,
 311                                 TMDB_API_KEY,
 312                                 query);
 313
 314         }
 315         else if (self->priv->service == MVS_SERVICE_WATC) {
 316                 /* WATCBASE_URL/ACTION/FORMAT/QUERY */
 317                 uri = g_strdup_printf (WATC_BASE_URL,
 318                                 WATC_ACTION,
 319                                 WATC_FORMAT,
 320                                 query);
 321         }
 322         else {
 323                 g_warning ("Service unsupported\n");
 324         }
 325
 326         return uri;
 327 }
 328
 329 gboolean
 330 mvs_minfo_provider_query (MvsMInfoProvider *self, MvsService service,
 331                           const gchar *query)
 332 {
 333         g_return_val_if_fail (MVS_IS_MINFO_PROVIDER (self), FALSE);
 334
 335         self->priv->service = service;
 336
 337         SoupSession *session = NULL;
 338         SoupMessage *message = NULL;
 339         gboolean message_queued = FALSE;
 340
 341         gchar *uri = get_query_uri (self, query);
 342
 343         g_return_val_if_fail (uri, FALSE);
 344
 345         session = soup_session_async_new ();
 346         message = soup_message_new ("GET", uri);
 347
 348         if (message) {
 349                 soup_session_queue_message (session, message,
 350                                 process_response_cb, self);
 351                 message_queued = TRUE;
 352         }
 353
 354         g_free (uri);
 355
 356         return message_queued;
 357 }
 358
 359 gboolean
 360 mvs_minfo_provider_set_format (MvsMInfoProvider *self,
 361                                const gchar *format)
 362 {
 363         g_return_val_if_fail (MVS_IS_MINFO_PROVIDER (self), FALSE);
 364
 365         g_free (self->priv->format);
 366
 367         self->priv->format = g_strdup (format);
 368
 369         return TRUE;
 370 }