letro-ios/ElementX/Sources/Other/Avatars.swift

//
// Copyright 2022-2024 New Vector Ltd.
//
// SPDX-License-Identifier: AGPL-3.0-only
// Please see LICENSE in the repository root for full details.
//

import Foundation
import SwiftUI

enum Avatars {
    enum Size {
        case user(on: UserAvatarSizeOnScreen)
        case room(on: RoomAvatarSizeOnScreen)
        //  custom
        case custom(CGFloat)

        /// Value in UIKit points
        var value: CGFloat {
            switch self {
            case .user(let screen):
                return screen.value
            case .room(let screen):
                return screen.value
            case .custom(let val):
                return val
            }
        }

        /// Value in pixels by using the scale of the main screen
        var scaledValue: CGFloat {
            value * UIScreen.main.scale
        }
        
        var scaledSize: CGSize {
            CGSize(width: scaledValue, height: scaledValue)
        }
    }
    
    @MainActor
    static func generatePlaceholderAvatarImageData(name: String, id: String, size: CGSize) -> Data? {
        let image = PlaceholderAvatarImage(name: name, contentID: id)
            .clipShape(Circle())
            .frame(width: size.width, height: size.height)
        
        let renderer = ImageRenderer(content: image)
        
        // Specify the scale so the image is rendered correctly. We don't have access to the screen
        // here so a hardcoded 3.0 will have to do
        renderer.scale = 3.0
        
        guard let image = renderer.uiImage else {
            MXLog.info("Generating notification icon placeholder failed")
            return nil
        }
        
        return image.pngData()
    }
}

enum UserAvatarSizeOnScreen {
    case timeline
    case home
    case settings
    case roomDetails
    case dmDetails
    case startChat
    case memberDetails
    case inviteUsers
    case readReceipt
    case readReceiptSheet
    case editUserDetails
    case suggestions
    case blockedUsers
    case knockingUsers

    var value: CGFloat {
        switch self {
        case .readReceipt:
            return 16
        case .readReceiptSheet:
            return 32
        case .timeline:
            return 32
        case .home:
            return 32
        case .suggestions:
            return 32
        case .blockedUsers:
            return 32
        case .settings:
            return 52
        case .roomDetails:
            return 44
        case .startChat:
            return 36
        case .memberDetails:
            return 96
        case .inviteUsers:
            return 56
        case .editUserDetails:
            return 96
        case .dmDetails:
            return 75
        case .knockingUsers:
            return 28
        }
    }
}

enum RoomAvatarSizeOnScreen {
    case timeline
    case home
    case messageForwarding
    case globalSearch
    case roomSelection
    case details
    case notificationSettings
    case roomDirectorySearch
    case joinRoom

    var value: CGFloat {
        switch self {
        case .notificationSettings:
            return 30
        case .timeline:
            return 32
        case .roomDirectorySearch:
            return 32
        case .messageForwarding:
            return 36
        case .globalSearch:
            return 36
        case .roomSelection:
            return 36
        case .home:
            return 52
        case .details:
            return 96
        case .joinRoom:
            return 96
        }
    }
}