From c1096e1d1ba20de1cc5868be3e66bd780c9b4316 Mon Sep 17 00:00:00 2001
From: Jeremy Rose <nornagon@nornagon.net>
Date: Tue, 25 Jul 2023 12:07:57 -0700
Subject: [PATCH] show constructions using an item

---
 src/data.ts                       | 12 ++++++++++++
 src/types/item/ComponentOf.svelte | 31 ++++++++++++++++++++++++++++++-
 2 files changed, 42 insertions(+), 1 deletion(-)

diff --git a/src/data.ts b/src/data.ts
index 3f0c9cc8..b673ef0f 100644
--- a/src/data.ts
+++ b/src/data.ts
@@ -1065,6 +1065,7 @@ export class CddaData {
   _itemComponentCache: {
     byTool: Map<string, Set<string>>;
     byComponent: Map<string, Set<string>>;
+    byConstruction: Map<string, Set<string>>;
   } | null = null;
   getItemComponents() {
     if (this._itemComponentCache) return this._itemComponentCache;
@@ -1106,9 +1107,20 @@ export class CddaData {
           itemsByComponent.get(component.id)!.add(recipe.result);
         }
     });
+    const itemsByConstruction = new Map<string, Set<string>>();
+    for (const c of this.byType("construction")) {
+      const { components } = this.normalizeRequirements(c);
+      for (const componentOptions of components)
+        for (const [component] of componentOptions) {
+          if (!itemsByConstruction.has(component))
+            itemsByConstruction.set(component, new Set());
+          itemsByConstruction.get(component)!.add(c.id);
+        }
+    }
     this._itemComponentCache = {
       byTool: itemsByTool,
       byComponent: itemsByComponent,
+      byConstruction: itemsByConstruction,
     };
     return this._itemComponentCache;
   }
diff --git a/src/types/item/ComponentOf.svelte b/src/types/item/ComponentOf.svelte
index c113bccf..85be8ee5 100644
--- a/src/types/item/ComponentOf.svelte
+++ b/src/types/item/ComponentOf.svelte
@@ -11,7 +11,7 @@ const _context = "Item Basic Info";
 
 const data = getContext<CddaData>("data");
 
-const { byTool, byComponent } = data.getItemComponents();
+const { byTool, byComponent, byConstruction } = data.getItemComponents();
 
 const recipes: Set<string> = byComponent.get(item_id) ?? new Set();
 const toolRecipes: Set<string> = byTool.get(item_id) ?? new Set();
@@ -32,6 +32,14 @@ const toolResults = [...toolRecipes].sort((a, b) =>
     singularName(data.byId("item", b))
   )
 );
+
+const constructions = [...(byConstruction.get(item_id) ?? new Set())]
+  .map((id) => data.byId("construction", id))
+  .sort((a, b) =>
+    singularName(data.byId("construction_group", a.group)).localeCompare(
+      singularName(data.byId("construction_group", b.group))
+    )
+  );
 </script>
 
 {#if providedByVparts.length}
@@ -84,3 +92,24 @@ const toolResults = [...toolRecipes].sort((a, b) =>
     </section>
   {/if}
 </div>
+
+{#if constructions.length}
+  <section>
+    <h1>
+      {t("Used In Construction", { _context, _comment: "Section heading" })}
+    </h1>
+    <LimitedList items={constructions} let:item={f}>
+      <ThingLink id={f.group} type="construction_group" />
+      {#if f.pre_terrain}
+        on <ItemSymbol
+          item={data.byId(
+            f.pre_terrain.startsWith("f_") ? "furniture" : "terrain",
+            f.pre_terrain
+          )} />
+        <ThingLink
+          type={f.pre_terrain.startsWith("f_") ? "furniture" : "terrain"}
+          id={f.pre_terrain} />
+      {/if}
+    </LimitedList>
+  </section>
+{/if}