Cache set infos locally, increases startup performance

mtg-collector/network.py

@@ -0,0 +1,11 @@
+from urllib import request
+from urllib.error import URLError, HTTPError
+from mtgsdk import Set
+
+
+def net_load_sets():
+    try:
+        sets = Set.all()
+    except:
+        return ""
+    return sets

mtg-collector/search.py

@@ -1,4 +1,4 @@
-from urllib.error import URLError
+from urllib.error import URLError, HTTPError
 
 import gi
 from gi.repository import Pango
@@ -235,7 +235,7 @@ class SearchView(Gtk.Grid):
                 .where(rarity=rarityfilter) \
                 .where(pageSize=50)\
                 .where(page=1).all()
-        except URLError as err:
+        except (URLError, HTTPError) as err:
             print("Error connecting to the internet")
             GObject.idle_add(util.show_message, "Connection Error", str(err.reason), priority=GObject.PRIORITY_DEFAULT)
             GObject.idle_add(self.do_activate_controls, True, priorty=GObject.PRIORITY_DEFAULT)
@@ -338,7 +338,7 @@ class SearchView(Gtk.Grid):
     def do_activate_controls(self, active):
         self.searchEntry.set_editable(active)
         self.searchEntry.set_sensitive(active)
-        #self.searchbutton.set_sensitive(active)
+        self.searchbutton.set_sensitive(active)
         self.red_mana_button.set_sensitive(active)
         self.blue_mana_button.set_sensitive(active)
         self.black_mana_button.set_sensitive(active)

mtg-collector/util.py

@@ -1,13 +1,18 @@
+import json
 import os
+import pickle
+
 import gi
 import re
+
 import config
+import network
 gi.require_version('Gtk', '3.0')
 from gi.repository import GdkPixbuf, Gtk
 from PIL import Image as PImage
 from urllib import request
 from mtgsdk import Set
-from urllib.error import URLError
+from urllib.error import URLError, HTTPError
 
 # Loacally stored images for faster loading times
 imagecache = []
@@ -20,12 +25,18 @@ status_bar = None
 
 
 def load_sets():
-    #setfile = os.open(config.cachepath + "/sets")
-    try:
-        sets = Set.all()
-    except URLError as err:
-        show_message("Connection Error", str(err.reason))
+    path = config.cachepath + "sets"
+    if not os.path.isfile(path):
+        # use mtgsdk api to retrieve al list of all sets
+        new_sets = network.net_load_sets()
+
+        if new_sets == "":
+            show_message("API Error", "Could not retrieve Set infos")
             return
+        # Serialize the loaded data to a file
+        pickle.dump(new_sets, open(config.cachepath + "sets", 'wb'))
+    # Deserialize set data from local file
+    sets = pickle.load(open(config.cachepath + "sets", 'rb'))
     for set in sets:
         set_list.append(set)