add a new folder structure redesign organized by packages

packages/core/constants.lua

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+rootUI = UI.getRootContainer()
+
+-- AnchorPoint
+AnchorNone = 0
+AnchorTop = 1
+AnchorBottom = 2
+AnchorLeft = 3
+AnchorRight = 4
+AnchorVerticalCenter = 5
+AnchorHorizontalCenter = 6
+

packages/core/core.lua

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+require 'constants'
+require 'util'
+require 'messagebox'

packages/core/messagebox.lua

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+MessageBox = {}
+MessageBox.__index = MessageBox
+
+-- messagebox flags
+MessageBoxOk = 1
+MessageBoxCancel = 2
+
+function MessageBox.create(title, text, flags)
+  local box = {}
+  setmetatable(box, MessageBox)
+
+  -- create messagebox window
+  local window = UIWindow.new("messageBoxWindow", rootUI)
+  window.title = title
+  window:centerIn(rootUI)
+  window:setLocked()
+
+  -- create messagebox label
+  local label = UILabel.new("messageBoxLabel", window)
+  label.text = text
+  label:addAnchor(AnchorHorizontalCenter, window, AnchorHorizontalCenter)
+  label:addAnchor(AnchorTop, window, AnchorTop)
+  label:setMargin(27, 0)
+
+  -- set window size based on label size
+  window.width = label.width + 40
+  window.height = label.height + 64
+
+  -- setup messagebox first button
+  local buttonText
+  local button1 = UIButton.new("messageBoxButton1", window)
+  button1:addAnchor(AnchorBottom, window, AnchorBottom)
+  button1:addAnchor(AnchorRight, window, AnchorRight)
+  button1:setMargin(10)
+
+  if flags == MessageBoxOk then
+    buttonText = "Ok"
+    box.onOk = createEmptyFunction()
+    button1.onClick = function()
+      box.onOk()
+      box:destroy()
+    end
+  elseif flags == MessageBoxCancel then
+    buttonText = "Cancel"
+    box.onCancel = createEmptyFunction()
+    button1.onClick = function()
+      box.onCancel()
+      box:destroy()
+    end
+  end
+  button1.text = buttonText
+
+  box.window = window
+  return box
+end
+
+function MessageBox:destroy()
+  if self.onDestroy then
+    self.onDestroy()
+    self.onDestroy = nil
+  end
+  if self.window then
+    self.window:destroy()
+    self.window = nil
+  end
+  self.onOk = nil
+  self.onCancel = nil
+end
+
+-- shortcuts for creating message boxes
+function displayMessageBox(title, text, flags)
+  return MessageBox.create(title, text, flags)
+end
+
+function displayErrorBox(title, text)
+  return MessageBox.create(title, text, MessageBoxOk)
+end
+
+function displayInfoBox(title, text)
+  return MessageBox.create(title, text, MessageBoxOk)
+end
+
+function displayCancelBox(title, text)
+  return MessageBox.create(title, text, MessageBoxCancel)
+end
+

packages/core/package.otml

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+title: Core
+description: Core utilities used by other modules
+author: otclient
+version: 1
+website: https://github.com/edubart/otclient
+enabled: true
+dependencies: [core_fonts, core_styles]
+script: core.lua
+

packages/core/util.lua

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+function createEmptyFunction()
+  local emptyFunction = function() end
+  return emptyFunction
+end
+