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 *url;
  27         gchar *local;
  28         GFile *src;
  29         GFile *dst;
  30         gchar *user_data;
  31 } cache_file_end_t;
  32
  33 static void cache_file_cb(GObject *source_object, GAsyncResult *res, gpointer _info)
  34 {
  35         cache_file_end_t *info = _info;
  36         GError *error = NULL;
  37         g_file_copy_finish(G_FILE(source_object), res, &error);
  38         if (error) {
  39                 g_message("error copying file ([%s]->[%s]): %s",
  40                         info->url, info->local, error->message);
  41                 g_error_free(error);
  42         } else {
  43                 info->callback(info->local, info->user_data);
  44         }
  45         g_object_unref(info->src);
  46         g_object_unref(info->dst);
  47         g_free(info->url);
  48         g_free(info->local);
  49         g_free(info);
  50 }
  51
  52 static goffset g_file_get_size(GFile *file)
  53 {
  54         GError *error = NULL;
  55         GFileInfo *info = g_file_query_info(file,
  56                         G_FILE_ATTRIBUTE_STANDARD_SIZE, 0, NULL, &error);
  57         if (error){
  58                 g_warning("unable to get file size: %s", error->message);
  59                 g_error_free(error);
  60         }
  61         goffset size = g_file_info_get_size(info);
  62         g_file_info_remove_attribute(info, G_FILE_ATTRIBUTE_STANDARD_SIZE);
  63         g_object_unref(info);
  64         return size;
  65 }
  66
  67 /**
  68  * Cache a image from Ridge to the local disk
  69  * \param  path  Path to the Ridge file, starting after /ridge/
  70  * \return The local path to the cached image
  71  */
  72 void cache_file(char *base, char *path, AWeatherCacheDoneCallback callback, gpointer user_data)
  73 {
  74         gchar *url   = g_strconcat(base, path, NULL);
  75         gchar *local = g_build_filename(g_get_user_cache_dir(), PACKAGE, path, NULL);
  76         GFile *src   = g_file_new_for_uri(url);
  77         GFile *dst   = g_file_new_for_path(local);
  78
  79         if (!g_file_test(local, G_FILE_TEST_EXISTS))
  80                 g_message("Caching file: local does not exist - %s", local);
  81         else if (g_file_get_size(src) != g_file_get_size(dst))
  82                 g_message("Caching file: sizes mismatch - %lld != %lld",
  83                                 g_file_get_size(src), g_file_get_size(dst));
  84         else {
  85                 callback(local, user_data);
  86                 g_object_unref(src);
  87                 g_object_unref(dst);
  88                 g_free(local);
  89                 g_free(url);
  90                 return;
  91         }
  92
  93         char *dir = g_path_get_dirname(local);
  94         if (!g_file_test(dir, G_FILE_TEST_IS_DIR))
  95                 g_mkdir_with_parents(dir, 0755);
  96         g_free(dir);
  97         cache_file_end_t *info = g_malloc0(sizeof(cache_file_end_t));
  98         info->callback  = callback;
  99         info->url       = url;
 100         info->local     = local;
 101         info->src       = src;
 102         info->dst       = dst;
 103         info->user_data = user_data;
 104         g_file_copy_async(src, dst,
 105                 G_FILE_COPY_OVERWRITE, // GFileCopyFlags flags,
 106                 0,                     // int io_priority,
 107                 NULL,                  // GCancellable *cancellable,
 108                 NULL,                  // GFileProgressCallback progress_callback,
 109                 NULL,                  // gpointer progress_callback_data,
 110                 cache_file_cb,         // GAsyncReadyCallback callback,
 111                 info);                 // gpointer user_data
 112 }