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         gchar *src;
  27         gchar *dst;
  28         gchar *user_data;
  29 } cache_file_end_t;
  30
  31 static void cache_file_cb(GObject *source_object, GAsyncResult *res, gpointer _info)
  32 {
  33         cache_file_end_t *info = _info;
  34         GError *error = NULL;
  35         g_file_copy_finish(G_FILE(source_object), res, &error);
  36         if (error) {
  37                 g_message("error copying file ([%s]->[%s]): %s",
  38                         info->src, info->dst, error->message);
  39         } else {
  40                 info->callback(info->dst, info->user_data);
  41         }
  42         g_free(info->src);
  43         g_free(info->dst);
  44         g_free(info);
  45 }
  46
  47 static goffset g_file_get_size(GFile *file)
  48 {
  49         GError *error = NULL;
  50         GFileInfo *info = g_file_query_info(file, G_FILE_ATTRIBUTE_STANDARD_SIZE, 0, NULL, &error);
  51         if (error)
  52                 g_warning("unable to get file size: %s", error->message);
  53         return g_file_info_get_size(info);
  54 }
  55
  56 /**
  57  * Cache a image from Ridge to the local disk
  58  * \param  path  Path to the Ridge file, starting after /ridge/
  59  * \return The local path to the cached image
  60  */
  61 void cache_file(char *base, char *path, AWeatherCacheDoneCallback callback, gpointer user_data)
  62 {
  63         gchar *url   = g_strconcat(base, path, NULL);
  64         gchar *local = g_build_filename(g_get_user_cache_dir(), PACKAGE, path, NULL);
  65         GFile *src = g_file_new_for_uri(url);
  66         GFile *dst = g_file_new_for_path(local);
  67
  68         if (!g_file_test(local, G_FILE_TEST_EXISTS))
  69                 g_message("Caching file: local does not exist - %s", local);
  70         else if (g_file_get_size(src) != g_file_get_size(dst))
  71                 g_message("Caching file: sizes mismatch - %lld != %lld",
  72                                 g_file_get_size(src), g_file_get_size(dst));
  73         else
  74                 return callback(local, user_data);
  75
  76         if (!g_file_test(g_path_get_dirname(local), G_FILE_TEST_IS_DIR))
  77                 g_mkdir_with_parents(g_path_get_dirname(local), 0755);
  78         cache_file_end_t *info = g_malloc0(sizeof(cache_file_end_t));
  79         info->callback  = callback;
  80         info->src       = url;
  81         info->dst       = local;
  82         info->user_data = user_data;
  83         g_file_copy_async(src, dst,
  84                 G_FILE_COPY_OVERWRITE, // GFileCopyFlags flags,
  85                 0,                     // int io_priority,
  86                 NULL,                  // GCancellable *cancellable,
  87                 NULL,                  // GFileProgressCallback progress_callback,
  88                 NULL,                  // gpointer progress_callback_data,
  89                 cache_file_cb,         // GAsyncReadyCallback callback,
  90                 info);                 // gpointer user_data
  91 }