73 lines
2.8 KiB
Swift
73 lines
2.8 KiB
Swift
//
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// Family2.swift
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//
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//
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// Created by Christian Treffs on 21.08.19.
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//
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// swiftlint:disable large_tuple
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public typealias Family2<A: Component, B: Component> = Family<Requires2<A, B>>
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public struct Requires2<A, B>: FamilyRequirementsManaging where A: Component, B: Component {
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public let componentTypes: [Component.Type]
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public init(_ components: (A.Type, B.Type)) {
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componentTypes = [ A.self, B.self]
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}
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public static func components(nexus: Nexus, entityId: EntityIdentifier) -> (A, B) {
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let compA: A = nexus.get(unsafeComponentFor: entityId)
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let compB: B = nexus.get(unsafeComponentFor: entityId)
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return (compA, compB)
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}
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public static func entityAndComponents(nexus: Nexus, entityId: EntityIdentifier) -> (Entity, A, B) {
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let entity: Entity = nexus.get(unsafeEntity: entityId)
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let compA: A = nexus.get(unsafeComponentFor: entityId)
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let compB: B = nexus.get(unsafeComponentFor: entityId)
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return (entity, compA, compB)
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}
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public static func relativesDescending(nexus: Nexus, parentId: EntityIdentifier, childId: EntityIdentifier) -> (parent: (A, B), child: (A, B)) {
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let pcA: A = nexus.get(unsafeComponentFor: parentId)
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let pcB: B = nexus.get(unsafeComponentFor: parentId)
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let ccA: A = nexus.get(unsafeComponentFor: childId)
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let ccB: B = nexus.get(unsafeComponentFor: childId)
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return (parent: (pcA, pcB), child: (ccA, ccB))
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}
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public static func createMember(nexus: Nexus, components: (A, B)) -> Entity {
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nexus.createEntity(with: components.0, components.1)
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}
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}
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extension Requires2: FamilyEncoding where A: Encodable, B: Encodable {
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public static func encode(components: (A, B), into container: inout KeyedEncodingContainer<DynamicCodingKey>, using strategy: CodingStrategy) throws {
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try container.encode(components.0, forKey: strategy.codingKey(for: A.self))
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try container.encode(components.1, forKey: strategy.codingKey(for: B.self))
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}
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}
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extension Requires2: FamilyDecoding where A: Decodable, B: Decodable {
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public static func decode(componentsIn container: KeyedDecodingContainer<DynamicCodingKey>, using strategy: CodingStrategy) throws -> (A, B) {
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let compA = try container.decode(A.self, forKey: strategy.codingKey(for: A.self))
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let compB = try container.decode(B.self, forKey: strategy.codingKey(for: B.self))
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return Components(compA, compB)
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}
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}
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extension Nexus {
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public func family<A, B>(
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requiresAll componentA: A.Type,
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_ componentB: B.Type,
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excludesAll excludedComponents: Component.Type...
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) -> Family2<A, B> where A: Component, B: Component {
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Family2<A, B>(
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nexus: self,
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requiresAll: (componentA, componentB),
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excludesAll: excludedComponents
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)
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}
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}
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