Fix invalid json error handling

wilty.py

@@ -9,12 +9,13 @@ class Wilty():
 
     def __init__(self):
         self.name = "wilty"
-        self.version = self.name + " 0.1"
+        self.version = self.name + " 0.2"
         self.save_dir = ".botany"
         self.plant_file = "_plant_data.json"
         self.visit_file = "visitors.json"
         self.harvest_file = "harvest_file.json"
         self.water_user = self.name
+        self.users = {}
         self.plants = {}
         self.live_plants = {}
         self.stats_model = {
@@ -94,7 +95,7 @@ class Wilty():
             sv_dir = "/home/" + u.pw_name + "/" + self.save_dir + "/"
             if os.path.exists(sv_dir) and \
                     os.access(sv_dir + u.pw_name + self.plant_file, os.R_OK):
-                self.plants[u.pw_name] = {}
+                self.users[u.pw_name] = {}
 
     def checkPlant(self, user):
         """Given the username, calculates the last time since the user's
@@ -118,11 +119,13 @@ class Wilty():
         states.
         """
         self.getUsers()
-        for u in self.plants:
+        for u in self.users:
             sv_dir = "/home/" + u + "/" + self.save_dir + "/"
             # Get plant data
             with open(sv_dir + u + self.plant_file) as plant_fh:
                 plant_json = plant_fh.read()
+            try:
+                # Load plant data if json is valid syntax
                 self.plants[u] = json.loads(plant_json)
                 # Get visitor data
                 if os.access(sv_dir + self.visit_file, os.R_OK) and \
@@ -145,6 +148,8 @@ class Wilty():
                 self.checkPlant(u)
                 if not self.plants[u]["is_dead"]:
                     self.live_plants[u] = self.plants[u]
+            except json.decoder.JSONDecodeError:
+                pass
 
     def waterRandomPlant(self):
         """Randomly select a live plant to water."""