feat: Add the send-to-orbit trigger I left out of #350.

Yafc.Model/Data/DataClasses.cs

@@ -95,9 +95,11 @@ public enum RecipeFlags {
     HasResearchTriggerBuildEntity = 1 << 7,
     /// <summary>Set when the technology has a research trigger to launch a space platform starter pack</summary>
     HasResearchTriggerCreateSpacePlatform = 1 << 8,
+    /// <summary>Set when the technology has a research trigger to launch an arbitrary item.</summary>
+    HasResearchTriggerSendToOrbit = 1 << 9,
 
     HasResearchTriggerMask = HasResearchTriggerCraft | HasResearchTriggerCaptureEntity | HasResearchTriggerMineEntity | HasResearchTriggerBuildEntity
-        | HasResearchTriggerCreateSpacePlatform,
+        | HasResearchTriggerCreateSpacePlatform | HasResearchTriggerSendToOrbit,
 }
 
 public abstract class RecipeOrTechnology : FactorioObject {
@@ -773,6 +775,7 @@ public class Technology : RecipeOrTechnology { // Technology is very similar to
     /// </summary>
     /// <remarks>Lazy-loaded so the database can load and correctly type (eg EntityCrafter, EntitySpawner, etc.) the entities without having to do another pass.</remarks>
     public IReadOnlyList<Entity> triggerEntities => getTriggerEntities.Value;
+    public Item? triggerItem { get; internal set; }
 
     /// <summary>
     /// Sets the value used to construct <see cref="triggerEntities"/>.
@@ -795,6 +798,9 @@ public override void GetDependencies(IDependencyCollector collector, List<Factor
             var items = Database.items.all.Where(i => i.factorioType == "space-platform-starter-pack");
             collector.Add([.. items.Select(i => Database.objectsByTypeName["Mechanics.launch." + i.name])], DependencyList.Flags.Source);
         }
+        if (flags.HasFlag(RecipeFlags.HasResearchTriggerSendToOrbit)) {
+            collector.Add([Database.objectsByTypeName["Mechanics.launch." + triggerItem]], DependencyList.Flags.Source);
+        }
 
         if (hidden && !enabled) {
             collector.Add(Array.Empty<FactorioId>(), DependencyList.Flags.Hidden);

Yafc.Parser/Data/FactorioDataDeserializer.cs

@@ -437,14 +437,7 @@ void readTrigger(LuaTable table) {
                 launchProducts = [];
             }
 
-            var recipe = CreateSpecialRecipe(item, SpecialNames.RocketLaunch, "launched");
-            recipe.ingredients =
-            [
-                new Ingredient(item, item.stackSize),
-                new Ingredient(rocketLaunch, 1)
-            ];
-            recipe.products = launchProducts;
-            recipe.time = 0f; // TODO what to put here?
+            EnsureLaunchRecipe(item, launchProducts);
         }
 
         if (GetRef(table, "spoil_result", out Item? spoiled)) {
@@ -485,6 +478,23 @@ void readEffect(LuaTable effect) {
         }
     }
 
+    /// <summary>
+    /// Creates, or confirms the existence of, a recipe for launching a particular item.
+    /// </summary>
+    /// <param name="item">The <see cref="Item"/> to be launched.</param>
+    /// <param name="launchProducts">The result of launching <see cref="Item"/>, if known. Otherwise <see langword="null"/>, to preserve
+    /// the existing launch products of a preexisting recipe, or set no products for a new recipe.</param>
+    private void EnsureLaunchRecipe(Item item, Product[]? launchProducts) {
+        Recipe recipe = CreateSpecialRecipe(item, SpecialNames.RocketLaunch, "launched");
+        recipe.ingredients =
+        [
+            new Ingredient(item, item.stackSize),
+            new Ingredient(rocketLaunch, 1),
+        ];
+        recipe.products = launchProducts ?? recipe.products ?? [];
+        recipe.time = 0f; // TODO what to put here?
+    }
+
     private Fluid SplitFluid(Fluid basic, int temperature) {
         logger.Information("Splitting fluid {FluidName} at {Temperature}", basic.name, temperature);
         basic.variants ??= [basic];

Yafc.Parser/Data/FactorioDataDeserializer_RecipeAndTechnology.cs

@@ -325,6 +325,17 @@ private void LoadResearchTrigger(LuaTable researchTriggerTable, ref Technology t
             case "create-space-platform":
                 technology.flags = RecipeFlags.HasResearchTriggerCreateSpacePlatform;
                 break;
+            case "send-item-to-orbit":
+                if (!researchTriggerTable.Get("item", out string? itemName)) {
+                    errorCollector.Error($"Research trigger {type} of {technology.typeDotName} does not have an item field", ErrorSeverity.MinorDataLoss);
+                    break;
+                }
+                Item item = GetObject<Item>(itemName);
+                technology.triggerItem = item;
+                technology.flags |= RecipeFlags.HasResearchTriggerSendToOrbit;
+                // Create a launch recipe for items without a `rocket_launch_products`, without altering existing launch recipes.
+                EnsureLaunchRecipe(item, null);
+                break;
             default:
                 errorCollector.Error($"Research trigger of {technology.typeDotName} has an unsupported type {type}", ErrorSeverity.MinorDataLoss);
                 break;

Yafc/Widgets/ObjectTooltip.cs

@@ -529,6 +529,7 @@ private static void BuildTechnology(Technology technology, ImGui gui) {
         bool isResearchTriggerMine = technology.flags.HasFlag(RecipeFlags.HasResearchTriggerMineEntity);
         bool isResearchTriggerBuild = technology.flags.HasFlag(RecipeFlags.HasResearchTriggerBuildEntity);
         bool isResearchTriggerPlatform = technology.flags.HasFlag(RecipeFlags.HasResearchTriggerCreateSpacePlatform);
+        bool isResearchTriggerLaunch = technology.flags.HasFlag(RecipeFlags.HasResearchTriggerSendToOrbit);
 
         if (!technology.flags.HasFlagAny(RecipeFlags.HasResearchTriggerMask)) {
             BuildRecipe(technology, gui);
@@ -580,6 +581,12 @@ private static void BuildTechnology(Technology technology, ImGui gui) {
                 BuildIconRow(gui, items, 2);
             }
         }
+        else if (isResearchTriggerLaunch) {
+            BuildSubHeader(gui, "Launch this item");
+            using (gui.EnterGroup(contentPadding)) {
+                gui.BuildFactorioObjectButtonWithText(technology.triggerItem);
+            }
+        }
 
         if (technology.unlockRecipes.Count > 0) {
             BuildSubHeader(gui, "Unlocks recipes");