242 lines
8.2 KiB
C#
242 lines
8.2 KiB
C#
using System;
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using System.Collections.Generic;
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using JetBrains.Annotations;
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using Unity.Cloud.Collaborate.Assets;
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using Unity.Cloud.Collaborate.Models;
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using Unity.Cloud.Collaborate.Views;
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using Unity.Cloud.Collaborate.Models.Structures;
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using UnityEngine;
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using UnityEngine.Assertions;
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namespace Unity.Cloud.Collaborate.Presenters
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{
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internal class HistoryPresenter : IHistoryPresenter
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{
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internal const int pageSize = 10;
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internal const string historyEntrySelectedId = "history-entry-selected";
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int m_MaxPages;
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bool m_IsStarted;
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[NotNull]
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readonly IHistoryView m_View;
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[NotNull]
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readonly IHistoryModel m_HistoryModel;
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[NotNull]
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readonly IMainModel m_MainModel;
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public HistoryPresenter([NotNull] IHistoryView view, [NotNull] IHistoryModel historyModel, [NotNull] IMainModel mainModel)
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{
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m_View = view;
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m_HistoryModel = historyModel;
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m_MainModel = mainModel;
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}
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/// <inheritdoc />
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public void Start()
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{
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Assert.IsFalse(m_IsStarted, "The presenter has already been started.");
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m_IsStarted = true;
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m_HistoryModel.HistoryListUpdated += OnHistoryListUpdated;
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m_HistoryModel.SelectedRevisionReceived += OnSelectedRevisionReceived;
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m_HistoryModel.EntryCountUpdated += OnEntryCountUpdated;
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m_HistoryModel.HistoryListReceived += OnHistoryListReceived;
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m_HistoryModel.BusyStatusUpdated += OnBusyStatusUpdated;
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m_HistoryModel.StateChanged += OnStateChanged;
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PopulateInitialData();
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}
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/// <inheritdoc />
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public void Stop()
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{
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Assert.IsTrue(m_IsStarted, "The presenter has already been stopped.");
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m_IsStarted = false;
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m_HistoryModel.HistoryListUpdated -= OnHistoryListUpdated;
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m_HistoryModel.SelectedRevisionReceived -= OnSelectedRevisionReceived;
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m_HistoryModel.EntryCountUpdated -= OnEntryCountUpdated;
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m_HistoryModel.HistoryListReceived -= OnHistoryListReceived;
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m_HistoryModel.BusyStatusUpdated -= OnBusyStatusUpdated;
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m_HistoryModel.StateChanged -= OnStateChanged;
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m_MainModel.UnregisterBackNavigation(historyEntrySelectedId);
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}
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/// <summary>
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/// Refresh state from the model.
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/// </summary>
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void OnStateChanged()
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{
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PopulateInitialData();
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}
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/// <summary>
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/// Populate the view with the initial data from the model.
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/// </summary>
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void PopulateInitialData()
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{
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m_View.SetBusyStatus(m_HistoryModel.Busy);
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if (!string.IsNullOrEmpty(m_HistoryModel.SelectedRevisionId))
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{
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m_HistoryModel.RequestSingleRevision(m_HistoryModel.SelectedRevisionId);
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}
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else if (!string.IsNullOrEmpty(m_HistoryModel.SavedRevisionId))
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{
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m_HistoryModel.RequestSingleRevision(m_HistoryModel.SavedRevisionId);
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}
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else
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{
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// Request initial data
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m_HistoryModel.RequestPageOfRevisions(pageSize);
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}
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m_HistoryModel.RequestEntryNumber();
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}
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/// <summary>
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/// Event handler to receive updated busy status.
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/// </summary>
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/// <param name="busy">New busy status.</param>
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void OnBusyStatusUpdated(bool busy)
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{
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m_View.SetBusyStatus(busy);
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}
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/// <summary>
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/// Event handler to receive requested history list.
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/// </summary>
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/// <param name="list">Received history list.</param>
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void OnHistoryListReceived(IReadOnlyList<IHistoryEntry> list)
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{
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if (list == null)
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{
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// Return back to first page of entries
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m_HistoryModel.PageNumber = 0;
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m_HistoryModel.RequestPageOfRevisions(pageSize);
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Debug.LogError("Request page does not exist.");
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return;
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}
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m_MainModel.UnregisterBackNavigation(historyEntrySelectedId);
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m_View.SetHistoryList(list);
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}
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/// <summary>
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/// Event handler to receive updated history entry count.
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/// </summary>
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/// <param name="count">New entry count.</param>
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void OnEntryCountUpdated(int? count)
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{
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if (count == null)
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{
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Debug.LogError("Unable to fetch number of revisions");
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return;
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}
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m_MaxPages = (count.Value - 1) / pageSize;
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m_View.SetPage(m_HistoryModel.PageNumber, m_MaxPages);
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}
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/// <summary>
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/// Event handler to receive requested single revision.
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/// </summary>
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/// <param name="entry">Received single revision.</param>
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void OnSelectedRevisionReceived(IHistoryEntry entry)
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{
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if (entry == null)
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{
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// Return back to all revisions list
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m_HistoryModel.RequestPageOfRevisions(pageSize);
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Debug.LogError("Unable to find requested revision");
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return;
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}
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m_MainModel.RegisterBackNavigation(historyEntrySelectedId, StringAssets.allHistory, OnBackEvent);
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m_View.SetSelection(entry);
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}
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/// <summary>
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/// Event handler for when the model has received a message of an updated history list.
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/// </summary>
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void OnHistoryListUpdated()
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{
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// Request updated number of entries.
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m_HistoryModel.RequestEntryNumber();
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// Request either single revision or list of revisions depending on current state.
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if (m_HistoryModel.IsRevisionSelected)
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{
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Assert.AreNotEqual(string.Empty, m_HistoryModel.SelectedRevisionId, "There should be a revision id at this point.");
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m_HistoryModel.RequestSingleRevision(m_HistoryModel.SelectedRevisionId);
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}
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else
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{
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m_HistoryModel.RequestPageOfRevisions(pageSize);
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}
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}
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/// <summary>
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/// Event handler for when the back button is pressed.
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/// </summary>
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void OnBackEvent()
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{
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// Return back to all revisions list
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m_HistoryModel.RequestPageOfRevisions(pageSize);
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}
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/// <inheritdoc />
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public void PrevPage()
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{
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m_HistoryModel.PageNumber = Math.Max(m_HistoryModel.PageNumber - 1, 0);
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m_HistoryModel.RequestPageOfRevisions(pageSize);
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m_View.SetPage(m_HistoryModel.PageNumber, m_MaxPages);
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}
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/// <inheritdoc />
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public void NextPage()
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{
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m_HistoryModel.PageNumber = Math.Min(m_HistoryModel.PageNumber + 1, m_MaxPages);
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m_HistoryModel.RequestPageOfRevisions(pageSize);
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m_View.SetPage(m_HistoryModel.PageNumber, m_MaxPages);
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}
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/// <inheritdoc />
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public string SelectedRevisionId
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{
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set
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{
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if (m_HistoryModel.SelectedRevisionId == value) return;
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m_HistoryModel.RequestSingleRevision(value);
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}
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}
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/// <inheritdoc />
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public void RequestGoto(string revisionId, HistoryEntryStatus status)
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{
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switch (status) {
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case HistoryEntryStatus.Ahead:
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m_HistoryModel.RequestUpdateTo(revisionId);
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break;
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case HistoryEntryStatus.Current:
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m_HistoryModel.RequestRestoreTo(revisionId);
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break;
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case HistoryEntryStatus.Behind:
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m_HistoryModel.RequestGoBackTo(revisionId);
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break;
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default:
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throw new ArgumentOutOfRangeException(nameof(status), status, null);
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}
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}
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/// <inheritdoc />
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public bool SupportsRevert => m_HistoryModel.SupportsRevert;
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/// <inheritdoc />
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public void RequestRevert(string revisionId, IReadOnlyList<string> files)
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{
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m_HistoryModel.RequestRevert(revisionId, files);
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}
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}
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}
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