Add serialization and deserialization functions to component, entity, world

examples/serialization/init.lua

@@ -0,0 +1,69 @@
+local Concord = require("concord")
+
+local function display(t)
+    print("Table: " ..tostring(t))
+    for key, value in pairs(t) do
+        if type(value) == "table" then
+            display(value)
+        else
+            print(key, value)
+        end
+    end
+end
+
+local test_component_1 = Concord.component(function(e, x, y)
+    e.x = x or 0
+    e.y = y or 0
+end)
+Concord.components.register("test_component_1", test_component_1)
+
+function test_component_1:serialize()
+    return {
+        x = self.x,
+        y = self.y,
+    }
+end
+
+function test_component_1:deserialize(data)
+    self.x = data.x or 0
+    self.y = data.y or 0
+end
+
+local test_component_2 = Concord.component(function(e, foo)
+    e.foo = foo
+end)
+Concord.components.register("test_component_2", test_component_2)
+
+function test_component_2:serialize()
+    return {
+        foo = self.foo
+    }
+end
+
+function test_component_2:deserialize(data)
+    self.foo = data.foo
+end
+
+-- Test worlds
+local world_1 = Concord.world()
+local world_2 = Concord.world()
+
+-- Test Entity
+Concord.entity(world_1)
+:give(test_component_1, 100, 50)
+:give(test_component_2, "Hello World!")
+
+-- Serialize world
+local data = world_1:serialize()
+
+-- Deserialize world
+world_2:deserialize(data)
+
+-- Check result
+local test_entity_copy = world_2:getEntities()[1]
+
+local test_comp_1 = test_entity_copy[test_component_1]
+local test_comp_2 = test_entity_copy[test_component_2]
+
+print(test_comp_1.x, test_comp_1.y)
+print(test_comp_2.foo)