Functions are chainable

cf-lib/data/Recipe.lua

@@ -39,6 +39,7 @@ end
 ---- @param data table The data to assign
 function Recipe:assign(data)
     table.assign(self.prototype, data)
+    return self
 end
 
 --- Adds an ingredient to the recipe
@@ -65,6 +66,7 @@ function Recipe:addIngredient(ingredientName, amount)
         end
     end
     table.insert(self.prototype.ingredients, { name = ingredientName, amount = amount, type = ingredientType })
+    return self
 end
 
 --- Replaces an existing ingredient by name with a new ingredient or adjusts the amount
@@ -81,10 +83,11 @@ function Recipe:replaceIngredient(old, new, amount)
             if result.name == old then
                 result.name = new
                 result.amount = amount or result.amount
-                return
+                return self
             end
         end
     end
+    return self
 end
 
 --- Removes an existing ingredient by name
@@ -94,10 +97,11 @@ function Recipe:removeIngredient(ingredientName)
         for i, result in pairs(self.prototype.ingredients) do
             if result.name == ingredientName then
                 self.prototype.ingredients[i] = nil
-                return
+                return self
             end
         end
     end
+    return self
 end
 
 --- Replaces an existing result by name with a new result
@@ -122,6 +126,7 @@ function Recipe:replaceResult(old, new, amount, expensiveAmount)
             table.main_product = new
         end
     end
+    return self
 end
 
 --- Adds the recipe to a technology
@@ -136,10 +141,11 @@ function Recipe:unlockedByTechnology(technology)
     end
     for _, effect in pairs(technology.effects) do
         if effect.type == "unlock-recipe" and effect.recipe == self.prototype.name then
-            return
+           return self
         end
     end
     table.insert(technology.effects, { type = "unlock-recipe", recipe = self.prototype.name })
+    return self
 end
 
 ---- Clones the recipe

cf-lib/data/Technology.lua

@@ -47,12 +47,14 @@ end
 --- @param data table The data to assign
 function Technology:assign(data)
     table.assign(self.prototype, data)
+    return self
 end
 
 --- Sets the prerequisite for the technology
 --- @param prerequisites table The names of the prerequisites
 function Technology:setPrerequisites(prerequisites)
     self.prototype.prerequisites = prerequisites
+    return self
 end
 
 --- Adds a prerequisite to the technology
@@ -63,6 +65,7 @@ function Technology:addPrerequisite(prerequisite)
     if (not table.contains(self.prototype.prerequisites, _prerequisite)) then
         table.insert(self.prototype.prerequisites, _prerequisite)
     end
+    return self
 end
 
 --- Adds multiple prerequisites to the technology
@@ -75,6 +78,7 @@ function Technology:addPrerequisites(prerequisites)
             table.insert(self.prototype.prerequisites, _prerequisite)
         end
     end
+    return self
 end
 
 --- Replaces a prerequisite in a technology
@@ -88,6 +92,7 @@ function Technology:replacePrerequisite(old, new)
             self.prototype.prerequisites[i] = _new
         end
     end
+    return self
 end
 
 --- Removes a prerequisite from the technology
@@ -97,9 +102,10 @@ function Technology:removePrerequisite(prerequisite)
     for i, techPrerequisite in pairs(self.prototype.prerequisites) do
         if techPrerequisite == _prerequisite then
             table.remove(self.prototype.prerequisites, i)
-            return
+            return self
         end
     end
+    return self
 end
 
 --- Adds an ingredient to the technology
@@ -109,6 +115,7 @@ function Technology:addIngredient(ingredientName, amount)
     self.prototype.unit = self.prototype.unit or { ingredients = {} }
     self.prototype.unit.ingredients = self.prototype.unit.ingredients or {}
     table.insert(self.prototype.unit.ingredients, { ingredientName, amount or 1 })
+    return self
 end
 
 --- Adds a list of ingredients to the technology with the default amount of 1
@@ -117,6 +124,7 @@ function Technology:addIngredients(ingredientNames)
     for _, ingredientName in pairs(ingredientNames) do
         self:addIngredient(ingredientName)
     end
+    return self
 end
 
 --- Removes an existing ingredient by name
@@ -129,6 +137,7 @@ function Technology:removeIngredient(ingredientName)
             end
         end
     end
+    return self
 end
 
 --- Adds a recipe unlock to the technology
@@ -136,16 +145,18 @@ end
 function Technology:addRecipe(recipeName)
     for _, effect in pairs(self.prototype.effects) do
         if effect.type == "unlock-recipe" and effect.recipe == recipeName then
-            return
+            return self
         end
     end
     table.insert(self.prototype.effects, { type = "unlock-recipe", recipe = recipeName })
+    return self
 end
 
 --- Adds an effect to the technology
 --- @param effect table The effect to add
 function Technology:addEffect(effect)
     table.insert(self.prototype.effects, effect)
+    return self
 end
 
 --- Removes a recipe unlock from the technology
@@ -154,9 +165,10 @@ function Technology:removeRecipe(recipeName)
     for i, effect in pairs(self.prototype.effects) do
         if effect.type == "unlock-recipe" and effect.recipe == recipeName then
             table.remove(self.prototype.effects, i)
-            return
+            return self
         end
     end
+    return self
 end
 
 --- Clones the technology