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bf08b86a36
Add more docs. Rename PhotoPickerPresenter to MediaPickerPresenter. Use a Character for the placeholder avatar rather than a string.
110 lines
3.9 KiB
Swift
110 lines
3.9 KiB
Swift
//
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// Copyright 2022 New Vector Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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import UIKit
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import PhotosUI
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import CommonKit
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@available(iOS 14.0, *)
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protocol MediaPickerPresenterDelegate: AnyObject {
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func mediaPickerPresenter(_ presenter: MediaPickerPresenter, didPickImage image: UIImage)
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func mediaPickerPresenterDidCancel(_ presenter: MediaPickerPresenter)
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}
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/// A picker for photos and videos from the user's photo library on iOS 14+ using the
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/// new `PHPickerViewController` that doesn't require permission to be granted.
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///
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/// **Note:** If you need to support iOS 12 & 13, then you will need to use the older
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/// `MediaPickerCoordinator`/`MediaPickerViewController` instead.
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@available(iOS 14.0, *)
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final class MediaPickerPresenter: NSObject {
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// MARK: - Properties
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// MARK: Private
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private weak var pickerViewController: UIViewController?
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private var indicatorPresenter: UserIndicatorTypePresenterProtocol?
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private var loadingIndicator: UserIndicator?
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// MARK: Public
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weak var delegate: MediaPickerPresenterDelegate?
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// MARK: - Public
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// TODO: Support videos and multi-selection
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func presentPicker(from presentingViewController: UIViewController, with filter: PHPickerFilter?, animated: Bool) {
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var configuration = PHPickerConfiguration(photoLibrary: .shared())
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configuration.selectionLimit = 1
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configuration.filter = filter
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let pickerViewController = PHPickerViewController(configuration: configuration)
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pickerViewController.delegate = self
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self.pickerViewController = pickerViewController
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indicatorPresenter = UserIndicatorTypePresenter(presentingViewController: pickerViewController)
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presentingViewController.present(pickerViewController, animated: true, completion: nil)
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}
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func dismiss(animated: Bool, completion: (() -> Void)?) {
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guard let pickerViewController = pickerViewController else { return }
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pickerViewController.dismiss(animated: animated, completion: completion)
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}
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// MARK: - Private
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func showLoadingIndicator() {
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loadingIndicator = indicatorPresenter?.present(.loading(label: VectorL10n.loading, isInteractionBlocking: true))
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}
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func hideLoadingIndicator() {
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loadingIndicator = nil
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}
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}
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// MARK: - PHPickerViewControllerDelegate
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@available(iOS 14, *)
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extension MediaPickerPresenter: PHPickerViewControllerDelegate {
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func picker(_ picker: PHPickerViewController, didFinishPicking results: [PHPickerResult]) {
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// TODO: Handle videos and multi-selection
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guard let provider = results.first?.itemProvider, provider.canLoadObject(ofClass: UIImage.self) else {
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self.delegate?.mediaPickerPresenterDidCancel(self)
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return
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}
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showLoadingIndicator()
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provider.loadObject(ofClass: UIImage.self) { [weak self] image, error in
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guard let self = self else { return }
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guard let image = image as? UIImage else {
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DispatchQueue.main.async {
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self.hideLoadingIndicator()
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self.delegate?.mediaPickerPresenterDidCancel(self)
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}
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return
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}
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DispatchQueue.main.async {
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self.hideLoadingIndicator()
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self.delegate?.mediaPickerPresenter(self, didPickImage: image)
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}
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}
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}
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}
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