Pileus Git - grits/blob - src/data.c

   1 /*
   2  * Copyright (C) 2009 Andy Spencer <spenceal@rose-hulman.edu>
   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 3 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, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include <config.h>
  19 #include <glib.h>
  20 #include <gio/gio.h>
  21
  22 #include "data.h"
  23
  24 typedef struct {
  25         AWeatherCacheDoneCallback callback;
  26         GFile *src;
  27         GFile *dst;
  28         gchar *user_data;
  29 } cache_file_end_t;
  30
  31 static goffset g_file_get_size(GFile *file)
  32 {
  33         GError *error = NULL;
  34         GFileInfo *info = g_file_query_info(file,
  35                         G_FILE_ATTRIBUTE_STANDARD_SIZE, 0, NULL, &error);
  36         if (error){
  37                 g_warning("unable to get file size: %s", error->message);
  38                 g_error_free(error);
  39         }
  40         goffset size = g_file_info_get_size(info);
  41         g_file_info_remove_attribute(info, G_FILE_ATTRIBUTE_STANDARD_SIZE);
  42         g_object_unref(info);
  43         return size;
  44 }
  45
  46 static void cache_file_cb(GObject *source_object, GAsyncResult *res, gpointer _info)
  47 {
  48         g_debug("data: cache_file_cb");
  49         cache_file_end_t *info = _info;
  50         char   *url   = g_file_get_path(info->src);
  51         char   *local = g_file_get_path(info->dst);
  52         GError *error = NULL;
  53         g_file_copy_finish(G_FILE(source_object), res, &error);
  54         if (error) {
  55                 g_warning("data: error copying file ([%s]->[%s]): %s",
  56                         url, local, error->message);
  57                 g_error_free(error);
  58         } else {
  59                 info->callback(local, TRUE, info->user_data);
  60         }
  61         g_object_unref(info->src);
  62         g_object_unref(info->dst);
  63         g_free(info);
  64         g_free(url);
  65         g_free(local);
  66 }
  67
  68 static void do_cache(GFile *src, GFile *dst, char *reason,
  69                 AWeatherCacheDoneCallback callback, gpointer user_data)
  70 {
  71         char *name = g_file_get_basename(dst);
  72         g_debug("data: do_cache - Caching file %s: %s", name, reason);
  73         g_free(name);
  74
  75         GFile *parent = g_file_get_parent(dst);
  76         if (!g_file_query_exists(parent, NULL)) {
  77                 char *path = g_file_get_path(parent);
  78                 g_mkdir_with_parents(path, 0755);
  79                 g_free(path);
  80         }
  81         g_object_unref(parent);
  82
  83         cache_file_end_t *info = g_malloc0(sizeof(cache_file_end_t));
  84         info->callback  = callback;
  85         info->src       = src;
  86         info->dst       = dst;
  87         info->user_data = user_data;
  88         g_file_copy_async(src, dst,
  89                 G_FILE_COPY_OVERWRITE,   // GFileCopyFlags flags,
  90                 G_PRIORITY_DEFAULT_IDLE, // int io_priority,
  91                 NULL,                    // GCancellable *cancellable,
  92                 NULL,                    // GFileProgressCallback progress_callback,
  93                 NULL,                    // gpointer progress_callback_data,
  94                 cache_file_cb,           // GAsyncReadyCallback callback,
  95                 info);                   // gpointer user_data
  96         return;
  97 }
  98
  99 /*
 100  * Cache a image from Ridge to the local disk
 101  * \param  path  Path to the Ridge file, starting after /ridge/
 102  * \return The local path to the cached image
 103  */
 104 void cache_file(char *base, char *path, AWeatherPolicyType update,
 105                 AWeatherCacheDoneCallback callback, gpointer user_data)
 106 {
 107         gchar *url   = g_strconcat(base, path, NULL);
 108         gchar *local = g_build_filename(g_get_user_cache_dir(), PACKAGE, path, NULL);
 109         GFile *src   = g_file_new_for_uri(url);
 110         GFile *dst   = g_file_new_for_path(local);
 111
 112         if (update == AWEATHER_ALWAYS)
 113                 return do_cache(src, dst, "cache forced", callback, user_data);
 114
 115         if (!g_file_test(local, G_FILE_TEST_EXISTS))
 116                 return do_cache(src, dst, "local does not exist", callback, user_data);
 117
 118         if (update == AWEATHER_AUTOMATIC && g_file_get_size(src) != g_file_get_size(dst))
 119                 return do_cache(src, dst, "size mismatch", callback, user_data);
 120
 121         /* No nead to cache, run the callback now and clean up */
 122         callback(local, FALSE, user_data);
 123         g_object_unref(src);
 124         g_object_unref(dst);
 125         g_free(local);
 126         g_free(url);
 127         return;
 128 }