[libgweather/gnome-3-36] weather: Work-around current weather not being available

[Bastien Nocera <hadess src gnome org>]

commit 94a662f383f6495ddb5f847b3a8a9a78110149f9
Author: Bastien Nocera <hadess hadess net>
Date:   Fri Jun 19 12:21:31 2020 +0200

    weather: Work-around current weather not being available
    
    When the current weather isn't available, such as when the NOAA METAR
    servers aren't working correctly, use the first forecast available if
    it's a forecast for less than an hour in the future.
    
    Closes: #44

 libgweather/gweather-weather.c | 32 ++++++++++++++++++++++++++++++--
 1 file changed, 30 insertions(+), 2 deletions(-)
---
diff --git a/libgweather/gweather-weather.c b/libgweather/gweather-weather.c
index 2ac0cd07..17c3612f 100644
--- a/libgweather/gweather-weather.c
+++ b/libgweather/gweather-weather.c
@@ -343,6 +343,32 @@ copy_weather_data (GWeatherInfo *src,
   dest->priv->visibility = src->priv->visibility;
 }
 
+static void
+fixup_current_conditions (GWeatherInfo *info)
+{
+  GWeatherInfo *first_forecast;
+
+  /* Current conditions already available */
+  if (info->priv->update != 0) {
+    g_debug ("Not fixing up current conditions, already valid");
+    return;
+  } else if (!info->priv->forecast_list ||
+             !info->priv->forecast_list->data) {
+    g_debug ("No forecast list available, not fixing up");
+    return;
+  }
+
+  first_forecast = info->priv->forecast_list->data;
+  /* Add current conditions from forecast if close enough */
+  if (first_forecast->priv->update - time(NULL) > 60 * 60) {
+    g_debug ("Forecast is too far in the future, ignoring");
+    return;
+  }
+
+  copy_weather_data (first_forecast, info);
+  g_debug ("Fixed up missing current weather with first forecast data");
+}
+
 void
 _gweather_info_request_done (GWeatherInfo *info,
                             SoupMessage  *message)
@@ -350,11 +376,13 @@ _gweather_info_request_done (GWeatherInfo *info,
     info->priv->requests_pending = g_slist_remove (info->priv->requests_pending, message);
     g_object_ref (message);
 
-    if (info->priv->requests_pending == NULL)
+    if (info->priv->requests_pending == NULL) {
+        fixup_current_conditions (info);
         g_signal_emit (info, gweather_info_signals[SIGNAL_UPDATED], 0);
-    else
+    } else {
         g_debug ("Not emitting 'updated' as there are still %d requests pending",
                  g_slist_length (info->priv->requests_pending));
+    }
 }
 
 /* it's OK to pass in NULL */