[chronojump] news on view: download image if missing (solve eventual image server problem)

[Xavier de Blas <xaviblas src gnome org>]

commit 61d8ca194c6a6a439e1b24023b06c28d4a858b3c
Author: Xavier de Blas <xaviblas gmail com>
Date:   Sat Jan 23 10:50:34 2021 +0100

    news on view: download image if missing (solve eventual image server problem)

 diagrams/processes/news.dia | Bin 5834 -> 5857 bytes
 src/gui/app1/news.cs        |  20 ++++++++++++++++----
 src/news.cs                 |  17 +++++++++++++++++
 3 files changed, 33 insertions(+), 4 deletions(-)
---
diff --git a/diagrams/processes/news.dia b/diagrams/processes/news.dia
index dc646532..c4120050 100644
Binary files a/diagrams/processes/news.dia and b/diagrams/processes/news.dia differ
diff --git a/src/gui/app1/news.cs b/src/gui/app1/news.cs
index 0c9f0c91..93fd6be8 100644
--- a/src/gui/app1/news.cs
+++ b/src/gui/app1/news.cs
@@ -54,14 +54,26 @@ public partial class ChronoJumpWindow
                // 1) select the news locally
                newsAtDB_l = SqliteNews.Select(false, -1, 10);
 
-               // 2) prepare the GUI
+               // 2) check if any of the images is missing (because or images server is down or any other 
reason)
+               bool allImagesSaved = true;
+               foreach(News news in newsAtDB_l)
+                       if(! news.ImageSavedOnDisc)
+                       {
+                               allImagesSaved = false;
+                               break;
+                       }
+
+
+               // 3) prepare the GUI
                alignment_news.Show(); // is hidden at beginning to allow being well shown when filled
                menus_and_mode_sensitive(false);
                app1s_notebook_sup_entered_from = notebook_sup.CurrentPage;
                notebook_sup.CurrentPage = Convert.ToInt32(notebook_sup_pages.NEWS);
 
-               // 3) get the news on the server
-               if(preferences.serverNewsDatetime != "" && preferences.serverNewsDatetime != 
preferences.clientNewsDatetime)
+               // 4) get the news on the server and/or display them
+               if(
+                               (preferences.serverNewsDatetime != "" && preferences.serverNewsDatetime != 
preferences.clientNewsDatetime)
+                               || allImagesSaved == false )
                {
                        newsDownloadCancel = false;
                        LogB.Information("newsGet thread will start");
@@ -69,7 +81,7 @@ public partial class ChronoJumpWindow
                        GLib.Idle.Add (new GLib.IdleHandler (pulseNewsGetGTK));
                        pingThread.Start();
                } else {
-                       // 3b) or display old news
+                       // 4b) or display old news
                        newsDisplay();
                }
        }
diff --git a/src/news.cs b/src/news.cs
index 79b14744..f0185a46 100644
--- a/src/news.cs
+++ b/src/news.cs
@@ -185,6 +185,23 @@ public class News
                        "\" WHERE code = " + code;
        }
 
+       //check if the image is saved or not, to download it if there where any problems on the server
+       public bool ImageSavedOnDisc
+       {
+               get {
+                       if(linkServerImage == "")
+                               return false;
+
+                       string extension = "";
+                       if(Util.IsJpeg(linkServerImage))
+                               extension = ".jpg";
+                       else if (Util.IsPng(linkServerImage))
+                               extension = ".png";
+
+                       return (File.Exists(Path.Combine(News.GetNewsDir(), code.ToString() + extension)));
+               }
+       }
+
        public int Code
        {
                get { return code; }