[gnome-software] snap: Use first featured snap as featured app

[Robert Ancell <rancell src gnome org>]

commit 7505d57cb91daf38299011e73b5c6927c3a4e400
Author: Robert Ancell <robert ancell canonical com>
Date:   Wed Jul 26 10:28:29 2017 +1200

    snap: Use first featured snap as featured app
    
    Use the first featured snap as the featured app. The remaining featured
    apps are used as the editors picks.
    
    We look for screenshots named banner.png and banner-icon.png to use
    as the featured app banner (they are not shown as normal screenshots).

 plugins/snap/gs-plugin-snap.c |   91 ++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 90 insertions(+), 1 deletions(-)
---
diff --git a/plugins/snap/gs-plugin-snap.c b/plugins/snap/gs-plugin-snap.c
index 1e7813d..7210e34 100644
--- a/plugins/snap/gs-plugin-snap.c
+++ b/plugins/snap/gs-plugin-snap.c
@@ -304,6 +304,83 @@ gs_plugin_destroy (GsPlugin *plugin)
 }
 
 gboolean
+gs_plugin_add_featured (GsPlugin *plugin,
+                       GsAppList *list,
+                       GCancellable *cancellable,
+                       GError **error)
+{
+       g_autoptr(GPtrArray) snaps = NULL;
+       SnapdSnap *snap;
+       g_autoptr(GsApp) app = NULL;
+       GPtrArray *screenshots;
+       guint i;
+       const gchar *banner_url = NULL, *icon_url = NULL;
+       g_autoptr(GString) background_css = NULL;
+       g_autofree gchar *css = NULL;
+
+       snaps = find_snaps (plugin, SNAPD_FIND_FLAGS_NONE, "featured", NULL, cancellable, error);
+
+       if (snaps == NULL)
+               return FALSE;
+
+       if (snaps->len == 0)
+               return TRUE;
+
+       /* use first snap as the featured app */
+       snap = snaps->pdata[0];
+       app = snap_to_app (plugin, snap);
+
+       /* if has a sceenshot called 'banner.png' or 'banner-icon.png' then use them for the banner */
+       screenshots = snapd_snap_get_screenshots (snap);
+       for (i = 0; i < screenshots->len; i++) {
+               SnapdScreenshot *screenshot = screenshots->pdata[i];
+               const gchar *url;
+               g_autofree gchar *filename = NULL;
+
+               url = snapd_screenshot_get_url (screenshot);
+               filename = g_path_get_basename (url);
+               if (g_strcmp0 (filename, "banner.png") == 0 ||
+                   g_strcmp0 (filename, "banner.jpg") == 0) {
+                       banner_url = url;
+               }
+               if (g_strcmp0 (filename, "banner-icon.png") == 0 ||
+                   g_strcmp0 (filename, "banner-icon.jpg") == 0) {
+                       icon_url = url;
+               }
+       }
+
+       background_css = g_string_new ("");
+       if (icon_url != NULL)
+               g_string_append_printf (background_css,
+                                       "url('%s') left center / auto 100%% no-repeat, ",
+                                       icon_url);
+       else
+               g_string_append_printf (background_css,
+                                       "url('%s') left center / auto 100%% no-repeat, ",
+                                       snapd_snap_get_icon (snap));
+       if (banner_url != NULL)
+               g_string_append_printf (background_css,
+                                       "url('%s') center / cover no-repeat;",
+                                       banner_url);
+       else
+               g_string_append_printf (background_css, "#FFFFFF;");
+       css = g_strdup_printf ("border-color: #000000;\n"
+                              "text-shadow: 0 1px 1px rgba(255,255,255,0.5);\n"
+                              "color: #000000;\n"
+                              "outline-offset: 0;\n"
+                              "outline-color: alpha(#ffffff, 0.75);\n"
+                              "outline-style: dashed;\n"
+                              "outline-offset: 2px;\n"
+                              "background: %s;",
+                              background_css->str);
+       gs_app_set_metadata (app, "GnomeSoftware::FeatureTile-css", css);
+
+       gs_app_list_add (list, app);
+
+       return TRUE;
+}
+
+gboolean
 gs_plugin_add_popular (GsPlugin *plugin,
                       GsAppList *list,
                       GCancellable *cancellable,
@@ -316,7 +393,8 @@ gs_plugin_add_popular (GsPlugin *plugin,
        if (snaps == NULL)
                return FALSE;
 
-       for (i = 0; i < snaps->len; i++) {
+       /* skip first snap - it is used as the featured app */
+       for (i = 1; i < snaps->len; i++) {
                g_autoptr(GsApp) app = snap_to_app (plugin, g_ptr_array_index (snaps, i));
                gs_app_list_add (list, app);
        }
@@ -555,9 +633,20 @@ gs_plugin_refine_app (GsPlugin *plugin,
 
                        for (i = 0; i < screenshots->len; i++) {
                                SnapdScreenshot *screenshot = screenshots->pdata[i];
+                               const gchar *url;
+                               g_autofree gchar *filename = NULL;
                                g_autoptr(AsScreenshot) ss = NULL;
                                g_autoptr(AsImage) image = NULL;
 
+                               /* skip sceenshots used for banner when app is featured */
+                               url = snapd_screenshot_get_url (screenshot);
+                               filename = g_path_get_basename (url);
+                               if (g_strcmp0 (filename, "banner.png") == 0 ||
+                                   g_strcmp0 (filename, "banner.jpg") == 0 ||
+                                   g_strcmp0 (filename, "banner-icon.png") == 0 ||
+                                   g_strcmp0 (filename, "banner-icon.jpg") == 0)
+                                       continue;
+
                                ss = as_screenshot_new ();
                                as_screenshot_set_kind (ss, AS_SCREENSHOT_KIND_NORMAL);
                                image = as_image_new ();