Add component instance with general methods. New component constructor

druid/system/component.lua

@@ -0,0 +1,75 @@
+local const = require("druid.const")
+
+local M = {}
+local instance = {}
+
+
+function instance.get_style(self)
+	if not self._meta.style then
+		return const.EMPTY_TABLE
+	end
+
+	return self._meta.style[self._component.name] or const.EMPTY_TABLE
+end
+
+
+function instance.set_style(self, component_style)
+	self._meta.style = component_style
+end
+
+
+function instance.set_template(self, template)
+	self._meta.template = template
+end
+
+
+function instance.set_nodes(self, nodes)
+	self._meta.nodes = nodes
+end
+
+
+function instance.get_context(self, context)
+	return self._meta.context
+end
+
+
+function instance.set_context(self, context)
+	self._meta.context = context
+end
+
+
+function instance.get_druid(self)
+	local context = { _context = self }
+	return setmetatable(context, { __index = self:get_context().druid })
+end
+
+
+function instance.setup_component(self, context, style)
+	self._meta = {
+		template = nil,
+		context = nil,
+		nodes = nil,
+		style = nil,
+	}
+
+	self:set_context(context)
+	self:set_style(style)
+
+	return self
+end
+
+
+function M.new(name, interest)
+	local mt = {
+		_component = {
+			name = name,
+			interest = interest
+		}
+	}
+	local component = setmetatable(mt, { __index = instance })
+
+	return component
+end
+
+
+return M

druid/system/druid_instance.lua

@@ -16,11 +16,11 @@ end
 local function create(self, module)
 	local instance = setmetatable({}, { __index = module })
 	-- Component context, self from component creation
-	instance.context = self._context
-	instance.druid_style = self._style
+	instance:setup_component(self._context, self._style)
+
 	table.insert(self, instance)
 
-	local register_to = module.interest
+	local register_to = module._component.interest
 	if register_to then
 		local v
 		for i = 1, #register_to do
@@ -58,7 +58,7 @@ function M.remove(self, instance)
 		end
 	end
 
-	local interest = instance.interest
+	local interest = instance._component.interest
 	if interest then
 		local v
 		for i = 1, #interest do