From 3cc57960fa6845b7f3858fc08cd145499af7e2e1 Mon Sep 17 00:00:00 2001
From: Dale McCoy <21223975+DaleStan@users.noreply.github.com>
Date: Mon, 9 Sep 2024 01:20:53 -0400
Subject: [PATCH] fix(#276): Unlock fixed recipes with their crafters.

This needs to be done recursively, in case a fixed recipe creates a crafter with another fixed recipe.
---
 .../Data/FactorioDataDeserializer_Context.cs  | 39 +++++++++++++++++++
 changelog.txt                                 |  5 +++
 2 files changed, 44 insertions(+)

diff --git a/Yafc.Parser/Data/FactorioDataDeserializer_Context.cs b/Yafc.Parser/Data/FactorioDataDeserializer_Context.cs
index f5f85493..5b1f7e98 100644
--- a/Yafc.Parser/Data/FactorioDataDeserializer_Context.cs
+++ b/Yafc.Parser/Data/FactorioDataDeserializer_Context.cs
@@ -391,6 +391,45 @@ private void CalculateMaps(bool netProduction) {
                 }
             }
 
+            Queue<EntityCrafter> crafters = new(allObjects.OfType<EntityCrafter>());
+
+            while (crafters.TryDequeue(out EntityCrafter? crafter)) {
+                // If this is a crafter with a fixed recipe with data.raw.recipe["fixed-recipe-name"].enabled = false
+                // (Exclude Mechanics; they aren't recipes in Factorio's fixed_recipe sense.)
+                if (recipeCrafters.GetRaw(crafter).SingleOrDefault(s => s.StartsWith(SpecialNames.FixedRecipe), false) != null
+                    && crafter.recipes.SingleOrDefault(r => r.GetType() == typeof(Recipe), false) is Recipe { enabled: false } fixedRecipe) {
+
+                    bool addedUnlocks = false;
+                    foreach (Recipe itemRecipe in crafter.itemsToPlace.SelectMany(i => i.production)) {
+                        // and (a recipe that creates an item that places) the crafter is accessible
+                        // from the beginning of the game, the fixed recipe is also accessible.
+                        if (itemRecipe.enabled) {
+                            fixedRecipe.enabled = true;
+                            addedUnlocks = true;
+                            break;
+                        }
+                        // otherwise, the recipe is also unlocked by all technologies that
+                        // unlock (a recipe that creates an item that places) the crafter.
+                        else if (itemRecipe.technologyUnlock.Except(fixedRecipe.technologyUnlock).Any()) {
+                            // Add the missing technology/ies
+                            fixedRecipe.technologyUnlock = [.. fixedRecipe.technologyUnlock.Union(itemRecipe.technologyUnlock)];
+                            addedUnlocks = true;
+                        }
+                    }
+
+                    if (addedUnlocks) {
+                        // If we added unlocks, and the fixed recipe creates (items that place) crafters,
+                        // queue those crafters for a second check, in case they also have fixed recipes.
+                        Item[] products = [.. fixedRecipe.products.Select(p => p.goods).OfType<Item>()];
+                        foreach (EntityCrafter newCrafter in allObjects.OfType<EntityCrafter>()) {
+                            if (newCrafter.itemsToPlace.Intersect(products).Any()) {
+                                crafters.Enqueue(newCrafter);
+                            }
+                        }
+                    }
+                }
+            }
+
             foreach (var mechanic in allMechanics) {
                 mechanic.locName = mechanic.source.locName + " " + mechanic.locName;
                 mechanic.locDescr = mechanic.source.locDescr;
diff --git a/changelog.txt b/changelog.txt
index b9e1a1d4..6773d5ae 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -15,6 +15,11 @@
 //     Internal changes: 
 //         Changes to the code that do not affect the behavior of the program.
 ----------------------------------------------------------------------------------------------------------------------
+Version: 0.10.1
+Date:
+    Bugfixes:
+        - Fixed recipes now become accessible when their crafter does.
+----------------------------------------------------------------------------------------------------------------------
 Version: 0.10.0
 Date:
     Feature: