[libgdata] demos: Add freebase demo

[Carlos Garnacho <carlosg src gnome org>]

commit 59a8370f5b210cb4df96f5ef788239b7fd4493f6
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Mar 17 02:48:30 2014 +0100

    demos: Add freebase demo
    
    This is a simple command line app that puts some of the api to work.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=726486

 Makefile.am                   |   31 ++++++-
 demos/freebase/freebase-cli.c |  203 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 233 insertions(+), 1 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 0a472d4..0576e9e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -611,7 +611,9 @@ CODE_COVERAGE_LCOV_OPTIONS = --base-directory $(abs_top_srcdir)
 noinst_PROGRAMS =
 
 if HAVE_GTK
-noinst_PROGRAMS += demos/scrapbook/scrapbook
+noinst_PROGRAMS +=                     \
+       demos/scrapbook/scrapbook       \
+       demos/freebase/freebase-cli
 endif
 
 demos_scrapbook_scrapbook_SOURCES = \
@@ -644,6 +646,33 @@ demos_scrapbook_scrapbook_LDADD = \
        $(AM_LDADD) \
        $(NULL)
 
+demos_freebase_freebase_cli_SOURCES = \
+        demos/freebase/freebase-cli.c  \
+        $(NULL)
+
+demos_freebase_freebase_cli_CPPFLAGS = \
+        -I$(top_srcdir)/ \
+        -I$(top_srcdir)/gdata \
+        -DG_LOG_DOMAIN=\"freebase\" \
+        -DLIBGDATA_DISABLE_DEPRECATED \
+        $(DISABLE_DEPRECATED) \
+        $(AM_CPPFLAGS) \
+        $(NULL)
+
+demos_freebase_freebase_cli_CFLAGS = \
+        $(WARN_CFLAGS) \
+        $(GDATA_CFLAGS) \
+        $(GNOME_CFLAGS) \
+        $(AM_CFLAGS) \
+        $(NULL)
+
+demos_freebase_freebase_cli_LDADD = \
+        $(top_builddir)/gdata/libgdata.la \
+        $(GDATA_LIBS) \
+        $(GNOME_LIBS) \
+        $(AM_LDADD) \
+        $(NULL)
+
 # Cleaning
 EXTRA_DIST += \
        autogen.sh              \
diff --git a/demos/freebase/freebase-cli.c b/demos/freebase/freebase-cli.c
new file mode 100644
index 0000000..9deb534
--- /dev/null
+++ b/demos/freebase/freebase-cli.c
@@ -0,0 +1,203 @@
+/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
+/*
+ * GData Client
+ * Copyright (C) 2014 Carlos Garnacho <carlosg gnome org>
+ *
+ * GData Client is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * GData Client is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with GData Client.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <gdata/gdata.h>
+#include <locale.h>
+#include <string.h>
+
+#define MAX_RESULTS 10
+
+static int
+print_usage (char *argv[])
+{
+       g_printerr ("usage -- %s [search <term>|topic <ID> [<filter>]|query <mql>]\n\n"
+                   "query examples (more info at https://developers.google.com/freebase/v1/mql-overview):\n"
+                   " '{\"id\":\"/en/linux\",\"/computer/software/license\":[]}'\n"
+                   " 
'[{\"name\":null,\"/geography/river/length\":null,\"type\":\"/geography/river\",\"/location/location/containedby\":{\"id\":\"/en/england\"}}]'\n"
+                   " 
'[{\"type\":\"/location/citytown\",\"name\":null,\"/location/location/time_zones\":{\"id\":\"/en/central_european_time\"},\"limit\":200}]'\n"
+                   "topic examples:\n"
+                   " '/en/gnome'\n"
+                   " '/m/0fpzzp'\n"
+                   " '/computer/software'\n"
+                   "search examples:\n"
+                   " 'gnome'\n"
+                   " 'linux'\n"
+                   " 'operating system'\n",
+                   argv[0]);
+       return -1;
+}
+
+int
+main (int argc, char *argv[])
+{
+       GDataFreebaseService *service;
+       GError *error = NULL;
+       gint retval = 0;
+
+       if (argc < 3)
+               return print_usage (argv);
+
+       setlocale (LC_ALL, "");
+       service = gdata_freebase_service_new (NULL, NULL);
+
+       if (strcmp (argv[1], "query") == 0) {
+               GDataFreebaseResult *result;
+               GDataFreebaseQuery *query;
+
+               query = gdata_freebase_query_new (argv[2]);
+               result = gdata_freebase_service_query (service, query, NULL, &error);
+
+               if (error) {
+                       g_critical ("Error querying Freebase: %s", error->message);
+                       g_error_free (error);
+               } else {
+                       GVariant *variant;
+                       gchar *str;
+
+                       variant = gdata_freebase_result_dup_variant (result);
+                       g_object_unref (result);
+
+                       str = g_variant_print (variant, FALSE);
+                       g_print ("%s\n", str);
+                       g_variant_unref (variant);
+                       g_free (str);
+               }
+
+               g_object_unref (query);
+       } else if (strcmp (argv[1], "search") == 0) {
+               GDataFreebaseSearchResult *result;
+               GDataFreebaseSearchQuery *query;
+
+               query = gdata_freebase_search_query_new (argv[2]);
+               result = gdata_freebase_service_search (service, query, NULL, &error);
+
+               if (error) {
+                       g_critical ("Error querying Freebase: %s", error->message);
+                       g_error_free (error);
+               } else {
+                       const GDataFreebaseSearchResultItem *item;
+                       guint count, i;
+
+                       count = gdata_freebase_search_result_get_num_items (result);
+
+                       g_print ("Showing %d of %d items:\n", count,
+                                gdata_freebase_search_result_get_total_hits (result));
+
+                       for (i = 0; i < count; i++) {
+                               item = gdata_freebase_search_result_get_item (result, i);
+
+                               g_print ("%2d: %s (%s), score: %f\n", i,
+                                        gdata_freebase_search_result_item_get_name (item),
+                                        gdata_freebase_search_result_item_get_id (item),
+                                        gdata_freebase_search_result_item_get_score (item));
+
+                               if (gdata_freebase_search_result_item_get_notable_id (item)) {
+                                       g_print ("    pertains to domain: %s(%s)",
+                                                gdata_freebase_search_result_item_get_notable_name (item),
+                                                gdata_freebase_search_result_item_get_notable_id (item));
+                               }
+
+                               g_print ("\n");
+                       }
+
+                       g_object_unref (result);
+               }
+
+               g_object_unref (query);
+       } else if (strcmp (argv[1], "topic") == 0) {
+               GDataFreebaseTopicResult *result;
+               GDataFreebaseTopicQuery *query;
+
+               query = gdata_freebase_topic_query_new (argv[2]);
+
+               if (argc > 3) {
+                       const gchar *filter[] = { argv[3], NULL };
+                       gdata_freebase_topic_query_set_filter (query, filter);
+               }
+
+               result = gdata_freebase_service_get_topic (service, query, NULL, &error);
+
+               if (error) {
+                       g_critical ("Error querying Freebase: %s", error->message);
+                       g_error_free (error);
+               } else {
+                       GDataFreebaseTopicObject *object;
+                       GPtrArray *properties;
+                       guint i;
+
+                       object = gdata_freebase_topic_result_dup_object (result);
+                       g_object_unref (result);
+
+                       properties = gdata_freebase_topic_object_list_properties (object);
+
+                       for (i = 0; i < properties->len; i++) {
+                               const gchar *property;
+                               gint64 hits, count, j;
+
+                               property = g_ptr_array_index (properties, i);
+                               count = gdata_freebase_topic_object_get_property_count (object, property);
+                               hits = gdata_freebase_topic_object_get_property_hits (object, property);
+
+                               if (count == hits)
+                                       g_print ("%s: (%" G_GINT64_FORMAT " values)\n", property, hits);
+                               else
+                                       g_print ("%s: (%" G_GINT64_FORMAT " of %" G_GINT64_FORMAT " 
values)\n", property, count, hits);
+
+                               for (j = 0; j < count; j++) {
+                                       GDataFreebaseTopicValue *value;
+                                       GType gtype;
+
+                                       value = gdata_freebase_topic_object_get_property_value (object, 
property, j);
+                                       g_print ("  %s", gdata_freebase_topic_value_get_text (value));
+
+                                       if (gdata_freebase_topic_value_is_image (value)) {
+                                               GInputStream *stream;
+
+                                               stream = gdata_freebase_service_get_image (service, value, 
NULL, 0, 0, NULL);
+                                               g_print (" (URI: '%s')",
+                                                        gdata_download_stream_get_download_uri 
(GDATA_DOWNLOAD_STREAM (stream)));
+                                               g_object_unref (stream);
+                                       }
+
+                                       gtype = gdata_freebase_topic_value_get_value_type (value);
+
+                                       if (gtype == GDATA_TYPE_FREEBASE_TOPIC_OBJECT) {
+                                               const GDataFreebaseTopicObject *value_object;
+
+                                               value_object = gdata_freebase_topic_value_get_object (value);
+                                               g_print (" (ID: '%s')", gdata_freebase_topic_object_get_id 
(value_object));
+                                       }
+
+                                       g_print ("\n");
+                               }
+                       }
+
+                       gdata_freebase_topic_object_unref (object);
+                       g_ptr_array_unref (properties);
+               }
+
+               g_object_unref (query);
+       } else {
+               retval = print_usage (argv);
+       }
+
+       g_object_unref (service);
+
+       return retval;
+}