[gnome-autoar] general: add getter of supported mime types

[Răzvan-Mihai Chițu <razvanchitu src gnome org>]

commit 086ec59fd9434b7f7c5982b251afaee7996299ee
Author: Razvan Chitu <razvan ch95 gmail com>
Date:   Mon Aug 15 21:00:58 2016 +0300

    general: add getter of supported mime types
    
    https://bugzilla.gnome.org/show_bug.cgi?id=768645

 Makefile.am                      |    2 +
 gnome-autoar/autoar-mime-types.c |  111 ++++++++++++++++++++++++++++++++++++++
 gnome-autoar/autoar-mime-types.h |   37 +++++++++++++
 gnome-autoar/autoar.h            |    1 +
 4 files changed, 151 insertions(+), 0 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 380a853..b4bcd57 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -27,6 +27,7 @@ libgnome_autoar_la_headers = \
        gnome-autoar/autoar-format-filter.h     \
        gnome-autoar/autoar-misc.h              \
        gnome-autoar/autoar-pref.h              \
+       gnome-autoar/autoar-mime-types.h        \
        $(NULL)
 libgnome_autoar_la_sources = \
        gnome-autoar/autoar-compressor.c        \
@@ -34,6 +35,7 @@ libgnome_autoar_la_sources = \
        gnome-autoar/autoar-format-filter.c     \
        gnome-autoar/autoar-misc.c              \
        gnome-autoar/autoar-pref.c              \
+       gnome-autoar/autoar-mime-types.c        \
        $(NULL)
 libgnome_autoar_la_private_files = \
        gnome-autoar/autoar-private.h           \
diff --git a/gnome-autoar/autoar-mime-types.c b/gnome-autoar/autoar-mime-types.c
new file mode 100644
index 0000000..572bf01
--- /dev/null
+++ b/gnome-autoar/autoar-mime-types.c
@@ -0,0 +1,111 @@
+/*
+ * autoar-mime-types.h
+ * Functions for checking autoar support for various mime types
+ *
+ * Copyright (C) 2016  Razvan Chitu <razvan ch95 gmail com>
+ *
+ * This program 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 of the License, or (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA  02110-1301, USA.
+ *
+ */
+
+ #include "autoar-mime-types.h"
+
+static gchar *supported_mime_types[] = {
+  "application/x-7z-compressed",
+  "application/x-7z-compressed-tar",
+  "application/x-bzip",
+  "application/x-bzip-compressed-tar",
+  "application/x-compress",
+  "application/x-compressed-tar",
+  "application/x-cpio",
+  "application/x-gzip",
+  "application/x-lha",
+  "application/x-lzip",
+  "application/x-lzip-compressed-tar",
+  "application/x-lzma",
+  "application/x-lzma-compressed-tar",
+  "application/x-rar",
+  "application/x-tar",
+  "application/x-tarz",
+  "application/x-xar",
+  "application/x-xz",
+  "application/x-xz-compressed-tar",
+  "application/zip",
+  "application/gzip",
+  "application/bzip2",
+  NULL
+};
+
+static GHashTable *supported_mime_types_table = NULL;
+
+static void
+initialize_supported_mime_types_table (void)
+{
+  int i;
+
+  supported_mime_types_table = g_hash_table_new (g_str_hash,
+                                                 g_str_equal);
+
+  for (i = 0; supported_mime_types[i] != NULL; ++i) {
+    g_hash_table_add (supported_mime_types_table,
+                      supported_mime_types[i]);
+  }
+}
+
+/**
+ * autoar_check_mime_type_supported:
+ * @mime_type: a string representing the mime type
+ *
+ * Checks whether a mime type is supported by autoar. This function does no
+ * blocking IO.
+ *
+ * Returns: an #AutoarFilter
+ **/
+gboolean
+autoar_check_mime_type_supported (const gchar *mime_type)
+{
+  if (supported_mime_types_table == NULL) {
+    initialize_supported_mime_types_table ();
+  }
+
+  return g_hash_table_contains (supported_mime_types_table, mime_type);
+}
+
+/**
+ * autoar_query_mime_type_supported:
+ * @file: a #GFile to check if its mime type is supported
+ *
+ * This function will query the file's mime type and then call
+ * autoar_check_mime_type_supported(), so it does blocking IO.
+ *
+ * Returns: an #AutoarFilter
+ **/
+gboolean
+autoar_query_mime_type_supported (GFile *file)
+{
+  g_autoptr (GFileInfo) info = NULL;
+
+  g_return_val_if_fail (G_IS_FILE (file), FALSE);
+
+  info = g_file_query_info (file,
+                            G_FILE_ATTRIBUTE_STANDARD_CONTENT_TYPE,
+                            G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
+                            NULL, NULL);
+
+  g_return_val_if_fail (G_IS_FILE_INFO (info), FALSE);
+
+  return autoar_check_mime_type_supported (g_file_info_get_content_type (info));
+}
diff --git a/gnome-autoar/autoar-mime-types.h b/gnome-autoar/autoar-mime-types.h
new file mode 100644
index 0000000..f7b2278
--- /dev/null
+++ b/gnome-autoar/autoar-mime-types.h
@@ -0,0 +1,37 @@
+/*
+ * autoar-mime-types.h
+ * Functions for checking autoar support for various mime types
+ *
+ * Copyright (C) 2016  Razvan Chitu <razvan ch95 gmail com>
+ *
+ * This program 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 of the License, or (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA  02110-1301, USA.
+ *
+ */
+
+#ifndef AUTOAR_MIME_TYPES_H
+#define AUTOAR_MIME_TYPES_H
+
+#include <glib.h>
+#include <gio/gio.h>
+
+G_BEGIN_DECLS
+
+gboolean autoar_check_mime_type_supported (const gchar *mime_type);
+gboolean autoar_query_mime_type_supported (GFile *file);
+
+G_END_DECLS
+
+#endif /* AUTOAR_MIME_TYPES_H */
diff --git a/gnome-autoar/autoar.h b/gnome-autoar/autoar.h
index ddb0adc..f06ffae 100644
--- a/gnome-autoar/autoar.h
+++ b/gnome-autoar/autoar.h
@@ -27,6 +27,7 @@
 #include <gnome-autoar/autoar-format-filter.h>
 #include <gnome-autoar/autoar-extractor.h>
 #include <gnome-autoar/autoar-misc.h>
+#include <gnome-autoar/autoar-mime-types.h>
 #include <gnome-autoar/autoar-pref.h>
 
 #endif /* AUTOARCHIVE_H */