Filter Group

// Filter Group · syxUI · https://syxui.dev/components/acc-filter
// Free in any project. Keep this line and credit syxUI where a person can read it.

import SwiftUI

let accBlue = Color(red: 0.0, green: 0.47, blue: 1.0)

extension View {
    func formaCard(_ pad: CGFloat = 18) -> some View {
        self.padding(pad)
            .background(Color(.systemBackground), in: RoundedRectangle(cornerRadius: 20, style: .continuous))
            .overlay(RoundedRectangle(cornerRadius: 20, style: .continuous).stroke(Color.primary.opacity(0.06), lineWidth: 1))
            .shadow(color: .black.opacity(0.05), radius: 14, x: 0, y: 6)
    }
}

// Filter accordion - category expanded to checkboxes
struct AccFilter: View {
    @State private var open = true
    @State private var sel: Set<String> = ["Nike", "Adidas"]
    let brands = ["Nike", "Adidas", "Puma", "New Balance"]
    var body: some View {
        VStack(alignment: .leading, spacing: 0) {
            HStack {
                Text("Brand").font(.system(size: 15, weight: .semibold))
                Spacer()
                Text("\(sel.count)").font(.system(size: 12, weight: .bold)).foregroundStyle(.white).frame(width: 20, height: 20).background(accBlue, in: Circle())
                Image(systemName: "chevron.down").font(.system(size: 12, weight: .semibold)).foregroundStyle(.secondary).rotationEffect(.degrees(open ? 180 : 0)).padding(.leading, 6)
            }.padding(.vertical, 13)
            if open {
                ForEach(brands, id: \.self) { b in
                    HStack(spacing: 10) {
                        Image(systemName: sel.contains(b) ? "checkmark.square.fill" : "square").font(.system(size: 18)).foregroundStyle(sel.contains(b) ? accBlue : .secondary)
                        Text(b).font(.system(size: 15))
                        Spacer()
                    }.padding(.vertical, 7)
                }
            }
        }.formaCard(16).frame(width: 320)
    }
}