| | | 1 | | using Chronicis.Client.Abstractions; |
| | | 2 | | using Chronicis.Client.Services; |
| | | 3 | | using Chronicis.Shared.DTOs; |
| | | 4 | | using Chronicis.Shared.Extensions; |
| | | 5 | | |
| | | 6 | | namespace Chronicis.Client.ViewModels; |
| | | 7 | | |
| | | 8 | | /// <summary> |
| | | 9 | | /// ViewModel for the Cosmos page (the welcome/dashboard shown when no article is selected). |
| | | 10 | | /// Owns data loading, stat calculation, quote rotation, and article navigation. |
| | | 11 | | /// Implements <see cref="IDisposable"/> to clean up the tree-state subscription. |
| | | 12 | | /// </summary> |
| | | 13 | | public sealed class CosmosViewModel : ViewModelBase, IDisposable |
| | | 14 | | { |
| | | 15 | | private readonly IArticleApiService _articleApi; |
| | | 16 | | private readonly IQuoteService _quoteService; |
| | | 17 | | private readonly IBreadcrumbService _breadcrumbService; |
| | | 18 | | private readonly ITreeStateService _treeState; |
| | | 19 | | private readonly IAppNavigator _navigator; |
| | | 20 | | private readonly ILogger<CosmosViewModel> _logger; |
| | | 21 | | |
| | | 22 | | private CampaignStats? _stats; |
| | | 23 | | private List<ArticleDto>? _recentArticles; |
| | 34 | 24 | | private bool _isLoadingRecent = true; |
| | | 25 | | private Quote? _quote; |
| | 34 | 26 | | private bool _loadingQuote = true; |
| | | 27 | | |
| | | 28 | | /// <summary>Total articles count and related stats, or <c>null</c> before first load.</summary> |
| | | 29 | | public CampaignStats? Stats |
| | | 30 | | { |
| | 161 | 31 | | get => _stats; |
| | 22 | 32 | | private set => SetField(ref _stats, value); |
| | | 33 | | } |
| | | 34 | | |
| | | 35 | | /// <summary>The five most-recently-modified articles across the entire tree.</summary> |
| | | 36 | | public List<ArticleDto>? RecentArticles |
| | | 37 | | { |
| | 97 | 38 | | get => _recentArticles; |
| | 22 | 39 | | private set => SetField(ref _recentArticles, value); |
| | | 40 | | } |
| | | 41 | | |
| | | 42 | | /// <summary>Whether the recent-articles section is currently loading.</summary> |
| | | 43 | | public bool IsLoadingRecent |
| | | 44 | | { |
| | 37 | 45 | | get => _isLoadingRecent; |
| | 53 | 46 | | private set => SetField(ref _isLoadingRecent, value); |
| | | 47 | | } |
| | | 48 | | |
| | | 49 | | /// <summary>The current inspirational quote, or <c>null</c> before first load.</summary> |
| | | 50 | | public Quote? Quote |
| | | 51 | | { |
| | 45 | 52 | | get => _quote; |
| | 28 | 53 | | private set => SetField(ref _quote, value); |
| | | 54 | | } |
| | | 55 | | |
| | | 56 | | /// <summary>Whether the quote section is currently loading.</summary> |
| | | 57 | | public bool LoadingQuote |
| | | 58 | | { |
| | 37 | 59 | | get => _loadingQuote; |
| | 58 | 60 | | private set => SetField(ref _loadingQuote, value); |
| | | 61 | | } |
| | | 62 | | |
| | 34 | 63 | | public CosmosViewModel( |
| | 34 | 64 | | IArticleApiService articleApi, |
| | 34 | 65 | | IQuoteService quoteService, |
| | 34 | 66 | | IBreadcrumbService breadcrumbService, |
| | 34 | 67 | | ITreeStateService treeState, |
| | 34 | 68 | | IAppNavigator navigator, |
| | 34 | 69 | | ILogger<CosmosViewModel> logger) |
| | | 70 | | { |
| | 34 | 71 | | _articleApi = articleApi; |
| | 34 | 72 | | _quoteService = quoteService; |
| | 34 | 73 | | _breadcrumbService = breadcrumbService; |
| | 34 | 74 | | _treeState = treeState; |
| | 34 | 75 | | _navigator = navigator; |
| | 34 | 76 | | _logger = logger; |
| | | 77 | | |
| | 34 | 78 | | _treeState.OnStateChanged += OnTreeStateChanged; |
| | 34 | 79 | | } |
| | | 80 | | |
| | | 81 | | /// <summary> |
| | | 82 | | /// Loads dashboard data and quote in parallel, and optionally navigates to an article by URL path. |
| | | 83 | | /// Call from <c>OnInitializedAsync</c>. |
| | | 84 | | /// </summary> |
| | | 85 | | public async Task InitializeAsync(string? path) |
| | | 86 | | { |
| | | 87 | | if (!string.IsNullOrEmpty(path)) |
| | | 88 | | await LoadArticleByPathAsync(path); |
| | | 89 | | |
| | | 90 | | await Task.WhenAll(LoadDashboardDataAsync(), LoadQuoteAsync()); |
| | | 91 | | } |
| | | 92 | | |
| | | 93 | | /// <summary> |
| | | 94 | | /// Handles URL changes (browser back/forward). Call from <c>OnParametersSetAsync</c>. |
| | | 95 | | /// </summary> |
| | | 96 | | public async Task OnParametersSetAsync(string? path) |
| | | 97 | | { |
| | | 98 | | if (!string.IsNullOrEmpty(path)) |
| | | 99 | | await LoadArticleByPathAsync(path); |
| | | 100 | | } |
| | | 101 | | |
| | | 102 | | /// <summary>Refreshes the inspirational quote.</summary> |
| | | 103 | | public async Task LoadNewQuoteAsync() => await LoadQuoteAsync(); |
| | | 104 | | |
| | | 105 | | /// <summary>Creates an article with an empty title (the "Start Your First Article" hero button).</summary> |
| | | 106 | | public async Task CreateFirstArticleAsync() => await CreateArticleWithTitleAsync(string.Empty); |
| | | 107 | | |
| | | 108 | | /// <summary>Creates a new root article pre-populated with <paramref name="title"/> and navigates to it.</summary> |
| | | 109 | | public async Task CreateArticleWithTitleAsync(string title) |
| | | 110 | | { |
| | | 111 | | var createDto = new ArticleCreateDto |
| | | 112 | | { |
| | | 113 | | Title = title, |
| | | 114 | | Body = string.Empty, |
| | | 115 | | ParentId = null, |
| | | 116 | | EffectiveDate = DateTime.Now, |
| | | 117 | | }; |
| | | 118 | | |
| | | 119 | | var created = await _articleApi.CreateArticleAsync(createDto); |
| | | 120 | | if (created == null) |
| | | 121 | | { |
| | | 122 | | _logger.LogErrorSanitized("Failed to create article"); |
| | | 123 | | return; |
| | | 124 | | } |
| | | 125 | | |
| | | 126 | | await _treeState.RefreshAsync(); |
| | | 127 | | _treeState.ExpandPathToAndSelect(created.Id); |
| | | 128 | | } |
| | | 129 | | |
| | | 130 | | /// <summary>Navigates to <paramref name="articleId"/> by resolving its breadcrumb path.</summary> |
| | | 131 | | public async Task NavigateToArticleAsync(Guid articleId) |
| | | 132 | | { |
| | | 133 | | var article = await _articleApi.GetArticleDetailAsync(articleId); |
| | | 134 | | if (article != null) |
| | | 135 | | await _navigator.GoToArticleAsync(article); |
| | | 136 | | } |
| | | 137 | | |
| | | 138 | | /// <summary> |
| | | 139 | | /// Formats a <see cref="DateTime"/> as a human-readable relative string (e.g. "3h ago"). |
| | | 140 | | /// </summary> |
| | | 141 | | public static string FormatRelativeTime(DateTime dateTime) |
| | | 142 | | { |
| | 21 | 143 | | var timeSpan = DateTime.Now - dateTime; |
| | | 144 | | |
| | 21 | 145 | | if (timeSpan.TotalMinutes < 1) |
| | 1 | 146 | | return "just now"; |
| | 20 | 147 | | if (timeSpan.TotalMinutes < 60) |
| | 1 | 148 | | return $"{(int)timeSpan.TotalMinutes}m ago"; |
| | 19 | 149 | | if (timeSpan.TotalHours < 24) |
| | 1 | 150 | | return $"{(int)timeSpan.TotalHours}h ago"; |
| | 18 | 151 | | if (timeSpan.TotalDays < 7) |
| | 16 | 152 | | return $"{(int)timeSpan.TotalDays}d ago"; |
| | 2 | 153 | | if (timeSpan.TotalDays < 30) |
| | 1 | 154 | | return $"{(int)(timeSpan.TotalDays / 7)}w ago"; |
| | | 155 | | |
| | 1 | 156 | | return dateTime.ToString("MMM d, yyyy"); |
| | | 157 | | } |
| | | 158 | | |
| | | 159 | | // ------------------------------------------------------------------------- |
| | | 160 | | // Private helpers |
| | | 161 | | // ------------------------------------------------------------------------- |
| | | 162 | | |
| | | 163 | | private async Task LoadArticleByPathAsync(string path) |
| | | 164 | | { |
| | | 165 | | try |
| | | 166 | | { |
| | | 167 | | var article = await _articleApi.GetArticleByPathAsync(path); |
| | | 168 | | |
| | | 169 | | if (article != null) |
| | | 170 | | { |
| | | 171 | | if (article.Id != _treeState.SelectedArticleId) |
| | | 172 | | _treeState.ExpandPathToAndSelect(article.Id); |
| | | 173 | | } |
| | | 174 | | else if (!_treeState.SelectedArticleId.HasValue) |
| | | 175 | | { |
| | | 176 | | _logger.LogWarningSanitized("Article not found for path: {Path}", path); |
| | | 177 | | _navigator.NavigateTo("/", replace: true); |
| | | 178 | | } |
| | | 179 | | } |
| | | 180 | | catch (Exception ex) |
| | | 181 | | { |
| | | 182 | | _logger.LogErrorSanitized(ex, "Error loading article by path: {Path}", path); |
| | | 183 | | if (!_treeState.SelectedArticleId.HasValue) |
| | | 184 | | _navigator.NavigateTo("/", replace: true); |
| | | 185 | | } |
| | | 186 | | } |
| | | 187 | | |
| | | 188 | | private async Task LoadQuoteAsync() |
| | | 189 | | { |
| | | 190 | | LoadingQuote = true; |
| | | 191 | | try |
| | | 192 | | { |
| | | 193 | | Quote = await _quoteService.GetRandomQuoteAsync(); |
| | | 194 | | } |
| | | 195 | | catch (Exception ex) |
| | | 196 | | { |
| | | 197 | | _logger.LogErrorSanitized(ex, "Error loading quote"); |
| | | 198 | | } |
| | | 199 | | finally |
| | | 200 | | { |
| | | 201 | | LoadingQuote = false; |
| | | 202 | | } |
| | | 203 | | } |
| | | 204 | | |
| | | 205 | | private async Task LoadDashboardDataAsync() |
| | | 206 | | { |
| | | 207 | | IsLoadingRecent = true; |
| | | 208 | | try |
| | | 209 | | { |
| | | 210 | | var allArticles = await _articleApi.GetRootArticlesAsync(); |
| | | 211 | | RecentArticles = await GetRecentArticlesRecursiveAsync(allArticles); |
| | | 212 | | |
| | | 213 | | Stats = new CampaignStats |
| | | 214 | | { |
| | | 215 | | TotalArticles = CountTotalArticles(allArticles), |
| | | 216 | | RootArticles = allArticles.Count, |
| | | 217 | | RecentlyModified = RecentArticles.Count(a => |
| | | 218 | | (a.ModifiedAt ?? a.CreatedAt) > DateTime.Now.AddDays(-7)), |
| | | 219 | | DaysSinceStart = allArticles.Any() |
| | | 220 | | ? (int)(DateTime.Now - allArticles.Min(a => a.CreatedAt)).TotalDays |
| | | 221 | | : 0, |
| | | 222 | | }; |
| | | 223 | | } |
| | | 224 | | catch (Exception ex) |
| | | 225 | | { |
| | | 226 | | _logger.LogErrorSanitized(ex, "Error loading dashboard data"); |
| | | 227 | | } |
| | | 228 | | finally |
| | | 229 | | { |
| | | 230 | | IsLoadingRecent = false; |
| | | 231 | | } |
| | | 232 | | } |
| | | 233 | | |
| | | 234 | | private async Task<List<ArticleDto>> GetRecentArticlesRecursiveAsync( |
| | | 235 | | List<ArticleTreeDto> articles, |
| | | 236 | | int maxResults = 5) |
| | | 237 | | { |
| | | 238 | | var allArticles = new List<ArticleDto>(); |
| | | 239 | | |
| | | 240 | | foreach (var node in articles) |
| | | 241 | | { |
| | | 242 | | var full = await _articleApi.GetArticleAsync(node.Id); |
| | | 243 | | if (full != null) |
| | | 244 | | allArticles.Add(full); |
| | | 245 | | |
| | | 246 | | if (node.HasChildren && node.Children != null) |
| | | 247 | | { |
| | | 248 | | var childResults = await GetRecentArticlesRecursiveAsync( |
| | | 249 | | node.Children.ToList(), maxResults); |
| | | 250 | | allArticles.AddRange(childResults); |
| | | 251 | | } |
| | | 252 | | } |
| | | 253 | | |
| | | 254 | | return allArticles |
| | | 255 | | .OrderByDescending(a => a.ModifiedAt ?? a.CreatedAt) |
| | | 256 | | .Take(maxResults) |
| | | 257 | | .ToList(); |
| | | 258 | | } |
| | | 259 | | |
| | | 260 | | private static int CountTotalArticles(List<ArticleTreeDto> articles) |
| | | 261 | | { |
| | 23 | 262 | | int count = articles.Count; |
| | 82 | 263 | | foreach (var article in articles) |
| | | 264 | | { |
| | 18 | 265 | | if (article.Children != null) |
| | 1 | 266 | | count += CountTotalArticles(article.Children.ToList()); |
| | | 267 | | } |
| | 23 | 268 | | return count; |
| | | 269 | | } |
| | | 270 | | |
| | 1 | 271 | | private void OnTreeStateChanged() => RaisePropertyChanged(nameof(Stats)); |
| | | 272 | | |
| | | 273 | | /// <inheritdoc /> |
| | | 274 | | public void Dispose() |
| | | 275 | | { |
| | 11 | 276 | | _treeState.OnStateChanged -= OnTreeStateChanged; |
| | 11 | 277 | | } |
| | | 278 | | |
| | | 279 | | // ------------------------------------------------------------------------- |
| | | 280 | | // Nested types |
| | | 281 | | // ------------------------------------------------------------------------- |
| | | 282 | | |
| | | 283 | | /// <summary>Aggregated campaign statistics shown in the stat cards.</summary> |
| | | 284 | | public sealed record CampaignStats |
| | | 285 | | { |
| | | 286 | | /// <summary>Total number of articles across all levels of the hierarchy.</summary> |
| | | 287 | | public int TotalArticles { get; init; } |
| | | 288 | | |
| | | 289 | | /// <summary>Number of top-level (root) articles.</summary> |
| | | 290 | | public int RootArticles { get; init; } |
| | | 291 | | |
| | | 292 | | /// <summary>Number of articles modified in the last 7 days.</summary> |
| | | 293 | | public int RecentlyModified { get; init; } |
| | | 294 | | |
| | | 295 | | /// <summary>Days since the oldest article was created.</summary> |
| | | 296 | | public int DaysSinceStart { get; init; } |
| | | 297 | | } |
| | | 298 | | } |