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using System;
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using System.Linq;
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using System.Collections.Generic;
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using Microsoft.Xna.Framework;
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using Microsoft.Xna.Framework.Graphics;
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using Microsoft.Xna.Framework.Input;
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using Encompass;
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using JM.LinqFaster;
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using isometricparkfna.Messages;
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using isometricparkfna.Components;
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namespace isometricparkfna.Engines {
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[Receives(typeof(SpawnSelection),
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typeof(AdjustSelection))]
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[Writes(typeof(AreaComponent),
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// typeof(SelectedComponent),
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typeof(PreserveComponent))]
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[Reads(typeof(SelectedComponent),
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typeof(ContractStatusComponent),
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typeof(AreaComponent),
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typeof(PreserveComponent))]
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public class BuildToolEngine : Engine {
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private CellMap Map;
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public BuildToolEngine(CellMap map) {
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this.Map = map;
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}
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private System.Collections.Generic.IEnumerable<float> step_until(float start, float stop) {
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if (stop >= start) {
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for(float i = start; i <= stop; i++)
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{
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yield return i;
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}
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}
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else {
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for(float i = start; i >= stop; i--)
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{
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yield return i;
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}
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}
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}
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public override void Update(double dt) {
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var occupied = new List<Vector2>();
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foreach (var (entity, status) in ReadEntities<AreaComponent>()
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.WhereF((e) => HasComponent<ContractStatusComponent>(e))
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.SelectWhereF((e) => (e, GetComponent<ContractStatusComponent>(e)),
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(e) => ((e.Item2.status != ContractStatus.Broken)
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&& (e.Item2.status != ContractStatus.Rejected)
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&& (e.Item2.status != ContractStatus.Expired)
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&& (e.Item2.status != ContractStatus.Completed)
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&& (e.Item2.status != ContractStatus.Proposed))
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)) {
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var entitySquares = GetComponent<AreaComponent>(entity).squares;
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occupied.AddRange(entitySquares);
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}
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foreach (var entity in ReadEntities<AreaComponent>()
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.WhereF((e) => HasComponent<PreserveComponent>(e))) {
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var entitySquares = GetComponent<AreaComponent>(entity).squares;
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occupied.AddRange(entitySquares);
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}
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foreach (ref readonly var message in ReadMessages<SpawnSelection>())
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{
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if (message.Start.X >= 0 && message.Start.X < this.Map.MapWidth
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&& message.Start.Y >= 0 && message.Start.Y < this.Map.MapHeight) {
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var entity = CreateEntity();
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AddComponent(entity, new AreaComponent { squares = new[] {message.Start} });
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AddComponent(entity, new SelectedComponent { selected = true, Type= SelectionType.Area});
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}
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}
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foreach (ref readonly var message in ReadMessages<AdjustSelection>()) {
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foreach (ref readonly var entity in ReadEntities<SelectedComponent>()) {
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var selection = GetComponent<SelectedComponent>(entity);
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if(selection.Type == SelectionType.Area
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&& selection.selected) {
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if(message.Type == AdjustmentType.Clear) {
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Destroy(entity);
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}
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else if(message.Type == AdjustmentType.Complete) {
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SetComponent(entity, new PreserveComponent {});
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// SetComponent(entity, new SelectedComponent {selected = false });
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}
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else {
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var area = GetComponent<AreaComponent>(entity);
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var newSquares = new List<Vector2>();
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var end_x = MathUtils.Clamp(message.End.X, 0.0f, this.Map.MapWidth);
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var end_y = MathUtils.Clamp(message.End.Y, 0.0f, this.Map.MapHeight);
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foreach (var i in step_until(area.squares[0].X, end_x)) {
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foreach (var j in step_until(area.squares[0].Y, end_y)) {
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var newSquare = new Vector2(i, j);
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if (!occupied.Contains(newSquare)) {
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newSquares.Add(newSquare);
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}
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}
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}
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SetComponent(entity, new AreaComponent { squares = newSquares.ToArray() /*( new[]{ area.squares[0], message.End}*/});
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}
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}
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}
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}
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}
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}
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}
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