pteasima

protocol Effect {
    associatedtype Action
    static var none: Self { get }
    static func batch(_ effects: [Self]) -> Self

    // ! What should we return? Effect has associated types. Effect<B>, Self<B> are not possible.
    // Feels like a usecase for type-erasure but didnt get me anywhere (+ I feel like a type-erased AnyEffect defeats the purpose of tagless)
    //func map<B>(_ transform: @escaping (Action) -> B) -> ???

    // this works but is too general, we want to keep OtherEffect fixed to the same implementation as Self

pteasima

import ReactiveSwift
import enum Result.Result
import Alamofire

typealias Never = NoError

//This file alone wont build, its just for reading ;)

struct Tagged<Tag, RawValue> {
    var rawValue: RawValue

pteasima

import Foundation

private func get(keyPaths: [AnyKeyPath], from object: Any) -> Any {
  return keyPaths.reduce(object) { acc, kp in acc[keyPath: kp] }
}
extension Collection where Element: Equatable { //might not work for unordered collections
  func hasPrefix(_ prefix: Self) -> Bool {
    guard let firstFromPrefix = prefix.first else { return true }
    guard let firstFromSelf = self.first else { return false }
    return firstFromPrefix == firstFromSelf && dropFirst().hasPrefix(prefix.dropFirst())

pteasima

protocol Functor {
    associatedtype Tag
    associatedtype E //Element or _Element clashes on Dictionary :(
}
struct Functoring<F: Functor> {
    let _map: (F, (F.E) -> Any) -> Any
    func map<FB: Functor>(_ functor: F, transform: (F.E) -> FB.E) -> FB where F.Tag == FB.Tag {
        return _map(functor, transform) as! FB
    }
}

pteasima

import SwiftUI

extension Binding {
    init(global keyPath: KeyPath<Bindings, Binding>) {
        self = bindings[keyPath: keyPath]
    }
}

struct Bindings {
    @Binding var anotherOne: Bool

pteasima

import SwiftUI
import Combine

struct OnScroll: ViewModifier {
    @Binding var offset: CGFloat
    
    //we can have a version with a closure instead of the binding, but that triggers an infinite loop if content depends on the same Store
    //    var onOffset: (CGFloat) -> ()
    func body(content: Content) -> some View {
        return VStack {

pteasima

import SwiftUI
import Combine

@propertyWrapper struct MyObjectBinding<BindableObjectType: BindableObject> : DynamicViewProperty where BindableObjectType.PublisherType == PassthroughSubject<(), Never> {
    init(initialValue: BindableObjectType) {
        delegateValue = Wrapper(bindableObject: initialValue)
    }
    
    @dynamicMemberLookup struct Wrapper {
        var bindableObject: BindableObjectType

pteasima

import SwiftUI
import Combine

final class Store<State>: BindableObject {
    let didChange = PassthroughSubject<(), Never>()
    init(state: State) {
        self.state = state
    }
    var state: State {
        didSet {

pteasima

// WIP PoC of passing animated Binding transactions from a View to the Store.
// This works, but is probably a dead end since it will be better to have the Store decide on animations and impose them top-down
// I still havent played with interactive gestures tho, so this could come in handy someday

import SwiftUI
import Combine

final class P {
    let store: Store<ExampleApp.State, ExampleApp.Action> = ObjectBinding(initialValue: ExampleApp.theStore)
    func dispatch(_ action: ExampleApp.Action, transaction: Transaction? = nil) {

pteasima

// I wrote this and then decided its an overengineered piece of bullshit code. Just deleting it makes me sad so let it forever take up space on Github

// a property that flips back to its default value when it is read
// TODO: does this have proper value semantics with the class inside? And do we even care?
@propertyWrapper struct ReadOnce<Value> {
    init(initialValue: Value) {
        defaultValue = initialValue
        box = ValueBox(value: initialValue)
    }
    private let defaultValue: Value