update session library

res/layouts/console.xml.lua

@@ -1,6 +1,6 @@
 console_mode = "console"
 
-history = session.get_entry("commands_history")
+history = session.get("commands_history")
 history_pointer = #history
 
 events.on("core:open_traceback", function()

res/layouts/pages/generators.xml.lua

@@ -1,4 +1,4 @@
-settings = session.get_entry('new_world')
+settings = session.get('new_world')
 
 function on_open()
     local names = generation.get_generators()

res/layouts/pages/new_world.xml.lua

@@ -1,4 +1,4 @@
-settings = session.get_entry('new_world')
+settings = session.get('new_world')
 
 function world_name_validator(name)
     return name:match("^[%w-\\.\\ ]+$") ~= nil and not world.exists(name)
@@ -20,7 +20,7 @@ function create_world()
     local name = document.name_box.text
     local seed = document.seed_box.text
     local generator = settings.generator
-    session.reset_entry('new_world')
+    session.reset('new_world')
     app.new_world(name, seed, generator)
 end
 

res/modules/internal/session.lua

@@ -1,7 +1,7 @@
 local entries = {}
 local this = {}
 
-function this.get_entry(name)
+function this.get(name)
     local entry = entries[name]
     if entry == nil then
         entry = {}
@@ -10,7 +10,11 @@ function this.get_entry(name)
     return entry
 end
 
-function this.reset_entry(name)
+function this.has(name)
+    return entries[name] ~= nil
+end
+
+function this.reset(name)
     entries[name] = nil
 end