[tracker-miners/wip/sthursfield/debian10-hacks: 4/5] HACK: Avoid new date time functions

[Sam Thursfield <sthursfield src gnome org>]

commit ec3d72d6c526471e405b76851827c9a5b2e88dbf
Author: Sam Thursfield <sam afuera me uk>
Date:   Wed Jun 16 14:19:44 2021 +0200

    HACK: Avoid new date time functions
    
    GLib 2.62

 src/miners/fs/tracker-miner-files.c            | 56 ++++++++++++++++++++++++++
 tests/libtracker-miner/tracker-miner-fs-test.c | 12 ++----
 2 files changed, 60 insertions(+), 8 deletions(-)
---
diff --git a/src/miners/fs/tracker-miner-files.c b/src/miners/fs/tracker-miner-files.c
index 518b19843..ba78739e1 100644
--- a/src/miners/fs/tracker-miner-files.c
+++ b/src/miners/fs/tracker-miner-files.c
@@ -272,6 +272,62 @@ tracker_miner_files_class_init (TrackerMinerFilesClass *klass)
        miner_files_error_quark = g_quark_from_static_string ("TrackerMinerFiles");
 }
 
+/* Backport */
+/**
+ * g_date_time_format_iso8601:
+ * @datetime: A #GDateTime
+ *
+ * Format @datetime in [ISO 8601 format](https://en.wikipedia.org/wiki/ISO_8601),
+ * including the date, time and time zone, and return that as a UTF-8 encoded
+ * string.
+ *
+ * Since GLib 2.66, this will output to sub-second precision if needed.
+ *
+ * Returns: (transfer full) (nullable): a newly allocated string formatted in
+ *   ISO 8601 format or %NULL in the case that there was an error. The string
+ *   should be freed with g_free().
+ *
+ * Since: 2.62
+ */
+gchar *
+g_date_time_format_iso8601 (GDateTime *datetime)
+{
+  GString *outstr = NULL;
+  gchar *main_date = NULL;
+  gint64 offset;
+  gchar *format = "%Y-%m-%dT%H:%M:%S";
+
+#if 0
+  /* if datetime has sub-second non-zero values below the second precision we
+   * should print them as well */
+  if (datetime->usec % G_TIME_SPAN_SECOND != 0)
+    format = "%Y-%m-%dT%H:%M:%S.%f";
+#endif
+
+  /* Main date and time. */
+  main_date = g_date_time_format (datetime, format);
+  outstr = g_string_new (main_date);
+  g_free (main_date);
+
+  /* Timezone. Format it as `%:::z` unless the offset is zero, in which case
+   * we can simply use `Z`. */
+  offset = g_date_time_get_utc_offset (datetime);
+
+  if (offset == 0)
+    {
+      g_string_append_c (outstr, 'Z');
+    }
+  else
+    {
+      gchar *time_zone = g_date_time_format (datetime, "%:::z");
+      g_string_append (outstr, time_zone);
+      g_free (time_zone);
+    }
+
+  return g_string_free (outstr, FALSE);
+}
+
+
 static void
 tracker_miner_files_check_unextracted (TrackerMinerFiles *mf)
 {
diff --git a/tests/libtracker-miner/tracker-miner-fs-test.c b/tests/libtracker-miner/tracker-miner-fs-test.c
index 8f13d764b..dd48a7262 100644
--- a/tests/libtracker-miner/tracker-miner-fs-test.c
+++ b/tests/libtracker-miner/tracker-miner-fs-test.c
@@ -35,7 +35,6 @@ test_miner_process_file (TrackerMinerFS      *miner,
                          gboolean             created)
 {
        TrackerResource *resource;
-       GDateTime *modification_time;
        TrackerIndexingTree *tree;
        gchar *uri, *parent_uri, *str;
        GFile *parent;
@@ -55,13 +54,10 @@ test_miner_process_file (TrackerMinerFS      *miner,
        tracker_resource_add_relation (resource, "nie:isStoredAs", resource);
 
        if (info) {
-               modification_time = g_file_info_get_modification_date_time (info);
-               if (modification_time) {
-                       str = g_date_time_format_iso8601 (modification_time);
-                       tracker_resource_set_string (resource, "nfo:fileLastModified", str);
-                       g_free (str);
-                       g_date_time_unref (modification_time);
-               }
+               time_t time_ = g_file_info_get_attribute_uint64 (info, G_FILE_ATTRIBUTE_TIME_MODIFIED);
+               char *time_str = tracker_date_to_string (time_);
+               tracker_resource_set_string (resource, "nfo:fileLastModified", time_str);
+               g_free (time_str);
        }
 
        tracker_resource_set_string (resource, "nie:url", uri);