1 files changed, 145 insertions, 0 deletions
diff --git a/src/nautilus-tracker-utilities.c b/src/nautilus-tracker-utilities.c
new file mode 100644
index 0000000..6230a50
--- /dev/null
+++ b/src/nautilus-tracker-utilities.c
@@ -0,0 +1,145 @@
+/* nautilus-tracker-utilities.c
+ *
+ * Copyright 2019 Carlos Soriano <csoriano@redhat.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#include "config.h"
+#include "nautilus-tracker-utilities.h"
+#include "nautilus-global-preferences.h"
+
+#define TRACKER_KEY_RECURSIVE_DIRECTORIES "index-recursive-directories"
+#define TRACKER_KEY_SINGLE_DIRECTORIES "index-single-directories"
+
+/* Shared global connection to Tracker Miner FS */
+static const gchar *tracker_miner_fs_busname = NULL;
+static TrackerSparqlConnection *tracker_miner_fs_connection = NULL;
+static GError *tracker_miner_fs_error = NULL;
+
+static gboolean
+get_host_tracker_miner_fs (GError **error)
+{
+    const gchar *busname = "org.freedesktop.Tracker3.Miner.Files";
+
+    g_message ("Connecting to %s", busname);
+    tracker_miner_fs_connection = tracker_sparql_connection_bus_new (busname, NULL, NULL, error);
+    if (*error)
+    {
+        g_warning ("Unable to create connection for session-wide Tracker indexer: %s", (*error)->message);
+        return FALSE;
+    }
+
+    tracker_miner_fs_busname = busname;
+    return TRUE;
+}
+
+static gboolean
+start_local_tracker_miner_fs (GError **error)
+{
+    const gchar *busname = APPLICATION_ID ".Tracker3.Miner.Files";
+
+    g_message ("Starting %s", busname);
+    tracker_miner_fs_connection = tracker_sparql_connection_bus_new (busname, NULL, NULL, error);
+    if (*error)
+    {
+        g_critical ("Could not start local Tracker indexer at %s: %s", busname, (*error)->message);
+        return FALSE;
+    }
+
+    tracker_miner_fs_busname = busname;
+    return TRUE;
+}
+
+static gboolean
+inside_flatpak (void)
+{
+    return g_file_test ("/.flatpak-info", G_FILE_TEST_EXISTS);
+}
+
+static void
+setup_tracker_miner_fs_connection (void)
+{
+    static gsize tried_tracker_init = FALSE;
+
+    if (g_once_init_enter (&tried_tracker_init))
+    {
+        gboolean success;
+
+        success = get_host_tracker_miner_fs (&tracker_miner_fs_error);
+
+        if (!success && inside_flatpak ())
+        {
+            g_clear_error (&tracker_miner_fs_error);
+            success = start_local_tracker_miner_fs (&tracker_miner_fs_error);
+        }
+
+        g_once_init_leave (&tried_tracker_init, TRUE);
+    }
+}
+
+/**
+ * nautilus_tracker_get_miner_fs_connection:
+ * @error: return location for a #GError
+ *
+ * This function returns a global singleton #TrackerSparqlConnection, or %NULL
+ * if we couldn't connect to Tracker Miner FS.
+ *
+ * The first time you call it, this function will block while trying to connect.
+ * This may take some time if starting Tracker Miners from a Flatpak bundle.
+ *
+ * The returned object is a globally shared singleton which should NOT be
+ * unreffed.
+ *
+ * Returns: a #TrackerSparqlConnection, or %NULL
+ */
+TrackerSparqlConnection *
+nautilus_tracker_get_miner_fs_connection (GError **error)
+{
+    setup_tracker_miner_fs_connection ();
+
+    if (tracker_miner_fs_error && error)
+    {
+        *error = g_error_copy (tracker_miner_fs_error);
+    }
+
+    return tracker_miner_fs_connection;
+}
+
+/**
+ * nautilus_tracker_get_miner_fs_busname:
+ * @error: return location for a #GError
+ *
+ * This function returns a DBus name that can be used to talk to
+ * tracker-miner-fs, or %NULL if there is no Tracker Miner FS available.
+ *
+ * The first time you call it, this function will block while trying to connect.
+ * This may take some time if starting Tracker Miners from a Flatpak bundle.
+ *
+ * Returns: a string
+ */
+const gchar *
+nautilus_tracker_get_miner_fs_busname (GError **error)
+{
+    setup_tracker_miner_fs_connection ();
+
+    if (tracker_miner_fs_error && error)
+    {
+        *error = g_error_copy (tracker_miner_fs_error);
+    }
+
+    return tracker_miner_fs_busname;
+}