Deepen faction economy and station planning

apps/backend/Industry/Planning/ProductionGraph.cs

@@ -0,0 +1,53 @@
+namespace SpaceGame.Api.Industry.Planning;
+
+public sealed class ProductionGraph
+{
+  public required IReadOnlyDictionary<string, ProductionCommodityNode> Commodities { get; init; }
+  public required IReadOnlyDictionary<string, ProductionProcessNode> Processes { get; init; }
+  public required IReadOnlyDictionary<string, IReadOnlyList<ProductionProcessNode>> ProcessesByOutputId { get; init; }
+  public required IReadOnlyDictionary<string, IReadOnlyList<ProductionProcessNode>> ProcessesByInputId { get; init; }
+  public required IReadOnlyDictionary<string, IReadOnlyList<string>> OutputsByModuleId { get; init; }
+
+  public IReadOnlyList<ProductionProcessNode> GetProcessesForOutput(string itemId) =>
+      ProcessesByOutputId.TryGetValue(itemId, out var processes) ? processes : [];
+
+  public IReadOnlyList<ProductionProcessNode> GetProcessesForInput(string itemId) =>
+      ProcessesByInputId.TryGetValue(itemId, out var processes) ? processes : [];
+
+  public string? GetPrimaryProducerModule(string itemId) =>
+      GetProcessesForOutput(itemId)
+        .SelectMany(process => process.RequiredModuleIds)
+        .FirstOrDefault();
+
+  public string? GetPrimaryOutputForModule(string moduleId) =>
+      OutputsByModuleId.TryGetValue(moduleId, out var outputs)
+        ? outputs.FirstOrDefault()
+        : null;
+
+  public IReadOnlyList<string> GetImmediateInputs(string itemId) =>
+      GetProcessesForOutput(itemId)
+        .SelectMany(process => process.Inputs.Keys)
+        .Distinct(StringComparer.Ordinal)
+        .ToList();
+}
+
+public sealed class ProductionCommodityNode
+{
+  public required string ItemId { get; init; }
+  public required string Name { get; init; }
+  public required string Group { get; init; }
+  public required string CargoKind { get; init; }
+  public List<string> ProducerProcessIds { get; } = [];
+  public List<string> ConsumerProcessIds { get; } = [];
+}
+
+public sealed class ProductionProcessNode
+{
+  public required string Id { get; init; }
+  public required string Label { get; init; }
+  public required string FacilityCategory { get; init; }
+  public required IReadOnlyList<string> RequiredModuleIds { get; init; }
+  public required IReadOnlyDictionary<string, float> Inputs { get; init; }
+  public required IReadOnlyDictionary<string, float> Outputs { get; init; }
+  public required bool ProducesShip { get; init; }
+}