| | | 1 | | using System.Collections.Frozen; |
| | | 2 | | using System.Text.RegularExpressions; |
| | | 3 | | using Chronicis.Api.Data; |
| | | 4 | | using Chronicis.Shared.DTOs; |
| | | 5 | | using Microsoft.EntityFrameworkCore; |
| | | 6 | | |
| | | 7 | | namespace Chronicis.Api.Services; |
| | | 8 | | |
| | | 9 | | /// <summary> |
| | | 10 | | /// Service for world public sharing and slug management |
| | | 11 | | /// </summary> |
| | | 12 | | public sealed partial class WorldPublicSharingService : IWorldPublicSharingService |
| | | 13 | | { |
| | | 14 | | private readonly ChronicisDbContext _context; |
| | | 15 | | private readonly ILogger<WorldPublicSharingService> _logger; |
| | | 16 | | |
| | | 17 | | // Reserved slugs that shouldn't be used |
| | 1 | 18 | | private static readonly FrozenSet<string> ReservedSlugs = new HashSet<string>(StringComparer.OrdinalIgnoreCase) |
| | 1 | 19 | | { "api", "admin", "public", "private", "new", "edit", "delete", "search", "login", "logout", "settings" } |
| | 1 | 20 | | .ToFrozenSet(StringComparer.OrdinalIgnoreCase); |
| | | 21 | | |
| | | 22 | | public WorldPublicSharingService(ChronicisDbContext context, ILogger<WorldPublicSharingService> logger) |
| | | 23 | | { |
| | 1 | 24 | | _context = context; |
| | 1 | 25 | | _logger = logger; |
| | 1 | 26 | | } |
| | | 27 | | |
| | | 28 | | public async Task<bool> IsPublicSlugAvailableAsync(string publicSlug, Guid? excludeWorldId = null) |
| | | 29 | | { |
| | | 30 | | var normalizedSlug = publicSlug.Trim().ToLowerInvariant(); |
| | | 31 | | |
| | | 32 | | var query = _context.Worlds |
| | | 33 | | .AsNoTracking() |
| | | 34 | | .Where(w => w.PublicSlug == normalizedSlug); |
| | | 35 | | |
| | | 36 | | if (excludeWorldId.HasValue) |
| | | 37 | | { |
| | | 38 | | query = query.Where(w => w.Id != excludeWorldId.Value); |
| | | 39 | | } |
| | | 40 | | |
| | | 41 | | return !await query.AnyAsync(); |
| | | 42 | | } |
| | | 43 | | |
| | | 44 | | public async Task<PublicSlugCheckResultDto> CheckPublicSlugAsync(string slug, Guid? excludeWorldId = null) |
| | | 45 | | { |
| | | 46 | | var normalizedSlug = slug.Trim().ToLowerInvariant(); |
| | | 47 | | |
| | | 48 | | // Validate format first |
| | | 49 | | var validationError = ValidatePublicSlug(normalizedSlug); |
| | | 50 | | if (validationError != null) |
| | | 51 | | { |
| | | 52 | | return new PublicSlugCheckResultDto |
| | | 53 | | { |
| | | 54 | | IsAvailable = false, |
| | | 55 | | ValidationError = validationError, |
| | | 56 | | SuggestedSlug = GenerateSuggestedSlug(slug) |
| | | 57 | | }; |
| | | 58 | | } |
| | | 59 | | |
| | | 60 | | // Check availability |
| | | 61 | | var isAvailable = await IsPublicSlugAvailableAsync(normalizedSlug, excludeWorldId); |
| | | 62 | | |
| | | 63 | | return new PublicSlugCheckResultDto |
| | | 64 | | { |
| | | 65 | | IsAvailable = isAvailable, |
| | | 66 | | ValidationError = null, |
| | | 67 | | SuggestedSlug = isAvailable ? null : await GenerateAvailableSlugAsync(normalizedSlug) |
| | | 68 | | }; |
| | | 69 | | } |
| | | 70 | | |
| | | 71 | | public async Task<WorldDto?> GetWorldByPublicSlugAsync(string publicSlug) |
| | | 72 | | { |
| | | 73 | | var normalizedSlug = publicSlug.Trim().ToLowerInvariant(); |
| | | 74 | | |
| | | 75 | | var world = await _context.Worlds |
| | | 76 | | .AsNoTracking() |
| | | 77 | | .Include(w => w.Owner) |
| | | 78 | | .Include(w => w.Campaigns) |
| | | 79 | | .FirstOrDefaultAsync(w => w.PublicSlug == normalizedSlug && w.IsPublic); |
| | | 80 | | |
| | | 81 | | if (world == null) |
| | | 82 | | return null; |
| | | 83 | | |
| | | 84 | | return new WorldDto |
| | | 85 | | { |
| | | 86 | | Id = world.Id, |
| | | 87 | | Name = world.Name, |
| | | 88 | | Slug = world.Slug, |
| | | 89 | | Description = world.Description, |
| | | 90 | | OwnerId = world.OwnerId, |
| | | 91 | | OwnerName = world.Owner?.DisplayName ?? "Unknown", |
| | | 92 | | CreatedAt = world.CreatedAt, |
| | | 93 | | CampaignCount = world.Campaigns?.Count ?? 0, |
| | | 94 | | MemberCount = world.Members?.Count ?? 0, |
| | | 95 | | IsPublic = world.IsPublic, |
| | | 96 | | IsTutorial = world.IsTutorial, |
| | | 97 | | PublicSlug = world.PublicSlug |
| | | 98 | | }; |
| | | 99 | | } |
| | | 100 | | |
| | | 101 | | /// <summary> |
| | | 102 | | /// Validate a public slug format. |
| | | 103 | | /// Returns null if valid, or an error message if invalid. |
| | | 104 | | /// </summary> |
| | | 105 | | public string? ValidatePublicSlug(string slug) |
| | | 106 | | { |
| | 6 | 107 | | if (string.IsNullOrWhiteSpace(slug)) |
| | 1 | 108 | | return "Public slug is required"; |
| | | 109 | | |
| | 5 | 110 | | if (slug.Length < 3) |
| | 1 | 111 | | return "Public slug must be at least 3 characters"; |
| | | 112 | | |
| | 4 | 113 | | if (slug.Length > 100) |
| | 1 | 114 | | return "Public slug must be 100 characters or less"; |
| | | 115 | | |
| | 3 | 116 | | if (!ValidPublicSlugRegex().IsMatch(slug)) |
| | 1 | 117 | | return "Public slug must contain only lowercase letters, numbers, and hyphens (no leading/trailing hyphens)" |
| | | 118 | | |
| | 2 | 119 | | if (ReservedSlugs.Contains(slug)) |
| | 1 | 120 | | return "This slug is reserved and cannot be used"; |
| | | 121 | | |
| | 1 | 122 | | return null; |
| | | 123 | | } |
| | | 124 | | |
| | | 125 | | /// <summary> |
| | | 126 | | /// Generate a suggested slug from user input. |
| | | 127 | | /// </summary> |
| | | 128 | | private static string GenerateSuggestedSlug(string input) |
| | | 129 | | { |
| | 1 | 130 | | var slug = input.Trim().ToLowerInvariant(); |
| | 1 | 131 | | slug = Regex.Replace(slug, @"[\s_]+", "-"); |
| | 1 | 132 | | slug = Regex.Replace(slug, @"[^a-z0-9-]", ""); |
| | 1 | 133 | | slug = Regex.Replace(slug, @"-+", "-"); |
| | 1 | 134 | | slug = slug.Trim('-'); |
| | | 135 | | |
| | 1 | 136 | | if (slug.Length < 3) |
| | 1 | 137 | | slug = slug.PadRight(3, '0'); |
| | | 138 | | |
| | 1 | 139 | | return slug; |
| | | 140 | | } |
| | | 141 | | |
| | | 142 | | /// <summary> |
| | | 143 | | /// Generate an available slug by appending numbers. |
| | | 144 | | /// </summary> |
| | | 145 | | private async Task<string> GenerateAvailableSlugAsync(string baseSlug) |
| | | 146 | | { |
| | | 147 | | var suffix = 1; |
| | | 148 | | var candidate = $"{baseSlug}-{suffix}"; |
| | | 149 | | |
| | | 150 | | while (!await IsPublicSlugAvailableAsync(candidate)) |
| | | 151 | | { |
| | | 152 | | suffix++; |
| | | 153 | | candidate = $"{baseSlug}-{suffix}"; |
| | | 154 | | |
| | | 155 | | if (suffix > 100) |
| | | 156 | | return $"{baseSlug}-{Guid.NewGuid().ToString()[..8]}"; |
| | | 157 | | } |
| | | 158 | | |
| | | 159 | | return candidate; |
| | | 160 | | } |
| | | 161 | | |
| | | 162 | | [GeneratedRegex(@"^[a-z0-9]+(-[a-z0-9]+)*$")] |
| | | 163 | | private static partial Regex ValidPublicSlugRegex(); |
| | | 164 | | } |