[libgdata] documents: Split out the code to get the content type of an entry

[Debarshi Ray <debarshir src gnome org>]

commit e1036b08a1fecc9cafadb8d788c837cc2bd1f865
Author: Debarshi Ray <debarshir gnome org>
Date:   Fri Jan 15 18:44:21 2016 +0100

    documents: Split out the code to get the content type of an entry
    
    We will need this in gdata_documents_document_get_download_uri.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=759180

 gdata/services/documents/gdata-documents-entry.c |   21 +++---------
 gdata/services/documents/gdata-documents-utils.c |   37 ++++++++++++++++++++-
 gdata/services/documents/gdata-documents-utils.h |    6 +++-
 3 files changed, 46 insertions(+), 18 deletions(-)
---
diff --git a/gdata/services/documents/gdata-documents-entry.c 
b/gdata/services/documents/gdata-documents-entry.c
index b1e37d3..ac713b7 100644
--- a/gdata/services/documents/gdata-documents-entry.c
+++ b/gdata/services/documents/gdata-documents-entry.c
@@ -2,7 +2,7 @@
 /*
  * GData Client
  * Copyright (C) Thibault Saunier 2009 <saunierthibault gmail com>
- * Copyright (C) Red Hat, Inc. 2015
+ * Copyright (C) Red Hat, Inc. 2015, 2016
  *
  * GData Client is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -816,27 +816,18 @@ get_content_type (void)
 static void
 get_json (GDataParsable *parsable, JsonBuilder *builder)
 {
-       GList *categories;
        GList *i;
        GList *parent_folders_list;
+       const gchar *mime_type;
 
        GDATA_PARSABLE_CLASS (gdata_documents_entry_parent_class)->get_json (parsable, builder);
 
        /* Inserting files: https://developers.google.com/drive/v2/reference/files/insert */
 
-       categories = gdata_entry_get_categories (GDATA_ENTRY (parsable));
-       for (i = categories; i != NULL; i = i->next) {
-               GDataCategory *category = GDATA_CATEGORY (i->data);
-               const gchar *label;
-               const gchar *scheme;
-
-               label = gdata_category_get_label (category);
-               scheme = gdata_category_get_scheme (category);
-               if (label != NULL && label[0] != '\0' && g_strcmp0 (scheme, 
"http://schemas.google.com/g/2005#kind";) == 0) {
-                       json_builder_set_member_name (builder, "mimeType");
-                       json_builder_add_string_value (builder, label);
-                       break;
-               }
+       mime_type = gdata_documents_utils_get_content_type (GDATA_DOCUMENTS_ENTRY (parsable));
+       if (mime_type != NULL) {
+               json_builder_set_member_name (builder, "mimeType");
+               json_builder_add_string_value (builder, mime_type);
        }
 
        /* Upload to a folder: https://developers.google.com/drive/v2/web/folder */
diff --git a/gdata/services/documents/gdata-documents-utils.c 
b/gdata/services/documents/gdata-documents-utils.c
index ed71dac..046b3ec 100644
--- a/gdata/services/documents/gdata-documents-utils.c
+++ b/gdata/services/documents/gdata-documents-utils.c
@@ -1,7 +1,7 @@
 /* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
 /*
  * GData Client
- * Copyright (C) Red Hat, Inc. 2015
+ * Copyright (C) Red Hat, Inc. 2015, 2016
  *
  * GData Client is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -17,7 +17,6 @@
  * License along with GData Client.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include "gdata-documents-entry.h"
 #include "gdata-documents-spreadsheet.h"
 #include "gdata-documents-text.h"
 #include "gdata-documents-presentation.h"
@@ -62,3 +61,37 @@ gdata_documents_utils_get_type_from_content_type (const gchar *content_type)
 
        return retval;
 }
+
+/*
+ * gdata_documents_utils_get_content_type:
+ * @entry: a #GDataDocumentsEntry
+ *
+ * Returns the content type of @entry, if any.
+ *
+ * Return value: (nullable): content type of @entry, %NULL otherwise
+ *
+ * Since: 0.17.5
+ */
+const gchar *
+gdata_documents_utils_get_content_type (GDataDocumentsEntry *entry)
+{
+       GList *categories;
+       GList *i;
+       const gchar *retval = NULL;
+
+       categories = gdata_entry_get_categories (GDATA_ENTRY (entry));
+       for (i = categories; i != NULL; i = i->next) {
+               GDataCategory *category = GDATA_CATEGORY (i->data);
+               const gchar *label;
+               const gchar *scheme;
+
+               label = gdata_category_get_label (category);
+               scheme = gdata_category_get_scheme (category);
+               if (label != NULL && label[0] != '\0' && g_strcmp0 (scheme, 
"http://schemas.google.com/g/2005#kind";) == 0) {
+                       retval = label;
+                       break;
+               }
+       }
+
+       return retval;
+}
diff --git a/gdata/services/documents/gdata-documents-utils.h 
b/gdata/services/documents/gdata-documents-utils.h
index 01cc460..a2a4b99 100644
--- a/gdata/services/documents/gdata-documents-utils.h
+++ b/gdata/services/documents/gdata-documents-utils.h
@@ -1,7 +1,7 @@
 /* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
 /*
  * GData Client
- * Copyright (C) Red Hat, Inc. 2015
+ * Copyright (C) Red Hat, Inc. 2015, 2016
  *
  * GData Client is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -23,6 +23,8 @@
 #include <glib.h>
 #include <glib-object.h>
 
+#include <gdata/services/documents/gdata-documents-entry.h>
+
 G_BEGIN_DECLS
 
 /* HACK: Used to convert GDataLink:uri to ID and vice-versa. */
@@ -30,6 +32,8 @@ G_BEGIN_DECLS
 
 G_GNUC_INTERNAL GType gdata_documents_utils_get_type_from_content_type (const gchar *content_type);
 
+G_GNUC_INTERNAL const gchar *gdata_documents_utils_get_content_type (GDataDocumentsEntry *entry);
+
 G_END_DECLS
 
 #endif /* !GDATA_DOCUMENTS_UTILS_H */