mirror of
https://github.com/vector-im/element-ios.git
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200 lines
6.4 KiB
Swift
200 lines
6.4 KiB
Swift
/*
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Copyright 2019 New Vector Ltd
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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final class ReactionsMenuViewModel: ReactionsMenuViewModelType {
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// MARK: - Properties
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// MARK: Private
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private let aggregations: MXAggregations
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private let roomId: String
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private let eventId: String
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// MARK: Public
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private(set) var isAgreeButtonSelected: Bool = false
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private(set) var isDisagreeButtonSelected: Bool = false
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private(set) var isLikeButtonSelected: Bool = false
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private(set) var isDislikeButtonSelected: Bool = false
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weak var viewDelegate: ReactionsMenuViewModelDelegate?
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weak var coordinatorDelegate: ReactionsMenuViewModelCoordinatorDelegate?
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// MARK: - Setup
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init(aggregations: MXAggregations, roomId: String, eventId: String) {
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self.aggregations = aggregations
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self.roomId = roomId
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self.eventId = eventId
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self.loadData()
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self.listenToDataUpdate()
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}
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// MARK: - Public
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func process(viewAction: ReactionsMenuViewAction) {
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var reaction: ReactionsMenuReaction?
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var newState: Bool?
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switch viewAction {
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case .toggleReaction(let menuReaction):
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reaction = menuReaction
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switch menuReaction {
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case .agree:
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newState = !self.isAgreeButtonSelected
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case .disagree:
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newState = !self.isDisagreeButtonSelected
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case .like:
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newState = !self.isLikeButtonSelected
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case .dislike:
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newState = !self.isDislikeButtonSelected
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}
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}
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guard let theReaction = reaction, let theNewState = newState else {
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return
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}
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self.react(withReaction: theReaction, selected: theNewState)
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}
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// MARK: - Private
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private func resetData() {
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self.isAgreeButtonSelected = false
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self.isDisagreeButtonSelected = false
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self.isLikeButtonSelected = false
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self.isDislikeButtonSelected = false
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}
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private func loadData() {
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guard let reactionCounts = self.aggregations.aggregatedReactions(onEvent: self.eventId, inRoom: self.roomId)?.reactions else {
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return
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}
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self.resetData()
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reactionCounts.forEach { (reactionCount) in
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if reactionCount.myUserHasReacted {
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if let reaction = ReactionsMenuReaction(rawValue: reactionCount.reaction) {
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switch reaction {
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case .agree:
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self.isAgreeButtonSelected = true
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case .disagree:
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self.isDisagreeButtonSelected = true
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case .like:
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self.isLikeButtonSelected = true
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case .dislike:
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self.isDislikeButtonSelected = true
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}
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}
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}
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}
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self.viewDelegate?.reactionsMenuViewModelDidUpdate(self)
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}
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private func listenToDataUpdate() {
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self.aggregations.listenToReactionCountUpdate(inRoom: self.roomId) { [weak self] (changes) in
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guard let sself = self else {
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return
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}
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if changes[sself.eventId] != nil {
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sself.loadData()
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}
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}
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}
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private func react(withReaction reaction: ReactionsMenuReaction, selected: Bool) {
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if selected {
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self.aggregations.sendReaction(reaction.rawValue, toEvent: self.eventId, inRoom: self.roomId, success: {[weak self] _ in
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guard let sself = self else {
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return
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}
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sself.coordinatorDelegate?.reactionsMenuViewModel(sself, didReactionComplete: reaction.rawValue, isAddReaction: true)
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}, failure: {[weak self] (error) in
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print("[ReactionsMenuViewModel] react: Error: \(error)")
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guard let sself = self else {
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return
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}
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sself.coordinatorDelegate?.reactionsMenuViewModel(sself, didReactionFailedWithError: error, reaction: reaction.rawValue, isAddReaction: true)
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})
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} else {
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self.aggregations.unReact(onReaction: reaction.rawValue, toEvent: self.eventId, inRoom: self.roomId, success: {[weak self] in
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guard let sself = self else {
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return
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}
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sself.coordinatorDelegate?.reactionsMenuViewModel(sself, didReactionComplete: reaction.rawValue, isAddReaction: false)
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}, failure: {[weak self] (error) in
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print("[ReactionsMenuViewModel] react: Error: \(error)")
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guard let sself = self else {
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return
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}
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sself.coordinatorDelegate?.reactionsMenuViewModel(sself, didReactionFailedWithError: error, reaction: reaction.rawValue, isAddReaction: false)
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})
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}
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self.coordinatorDelegate?.reactionsMenuViewModel(self, didSendReaction: reaction.rawValue, isAddReaction: !selected)
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if selected {
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self.ensure3StateButtons(withReaction: reaction)
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}
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}
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// We can like, dislike, be indifferent but we cannot like & dislike at the same time
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private func ensure3StateButtons(withReaction reaction: ReactionsMenuReaction) {
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var unreaction: ReactionsMenuReaction?
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switch reaction {
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case .agree:
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if isDisagreeButtonSelected {
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unreaction = .disagree
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}
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case .disagree:
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if isAgreeButtonSelected {
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unreaction = .agree
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}
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case .like:
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if isDislikeButtonSelected {
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unreaction = .dislike
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}
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case .dislike:
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if isLikeButtonSelected {
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unreaction = .like
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}
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}
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if let unreaction = unreaction {
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self.react(withReaction: unreaction, selected: false)
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}
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}
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}
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