From be4496b110e68e2c5a8f76f8ed770e9818befd68 Mon Sep 17 00:00:00 2001
From: Jake Mannens <jake@asger.xyz>
Date: Tue, 22 Aug 2023 10:00:21 +1000
Subject: Finalised initial implementation of NSFW tag filtering

---
 HBContext.cs                          |  4 +-
 MainLayout.razor                      |  2 +-
 Pages/Component/NsfwSwitch.razor      |  8 ++++
 Pages/Component/Switch.razor          |  5 +++
 Pages/Component/TagSelectDialog.razor | 18 +++++++-
 Pages/Gallery.razor                   | 44 +++++++++++++------
 Pages/TagDefinitions.razor            | 29 +++++++++----
 Pages/Upload.razor                    | 14 +------
 Pages/Upload.razor.css                |  9 +++-
 Program.cs                            |  1 +
 Services/TagService.cs                | 79 +++++++++++++++++++++++++++++++----
 Services/UserStateService.cs          | 21 ++++++++++
 12 files changed, 188 insertions(+), 46 deletions(-)
 create mode 100644 Pages/Component/NsfwSwitch.razor
 create mode 100644 Services/UserStateService.cs

diff --git a/HBContext.cs b/HBContext.cs
index 73ccdcb..74c040c 100644
--- a/HBContext.cs
+++ b/HBContext.cs
@@ -4,7 +4,7 @@ using HyperBooru.Services;
 namespace HyperBooru;
 
 public class HBContext : DbContext {
-    public static readonly Guid NSFWTag   = new("EBDAD4F8-455A-4351-8017-1D4854D6FA38");
+    public static readonly Guid NsfwTag   = new("EBDAD4F8-455A-4351-8017-1D4854D6FA38");
     public static readonly Guid IngestTag = new("EA212801-5BCC-4C0E-814F-FB9D30DB58BC");
 
     public DbSet<HBObject>      Objects        { get; set; }
@@ -40,7 +40,7 @@ public class HBContext : DbContext {
         modelBuilder.Entity<TagDefinition>().HasData(new TagDefinition[] {
             new() {
                 ObjectId = -1,
-                Guid     = NSFWTag,
+                Guid     = NsfwTag,
                 Source   = TagSource.Internal,
                 Name     = "nsfw"
             },
diff --git a/MainLayout.razor b/MainLayout.razor
index 7720fe2..714c925 100644
--- a/MainLayout.razor
+++ b/MainLayout.razor
@@ -10,7 +10,7 @@
 
     <p id="nsfw-label">NSFW</p>
     <div id="nsfw-switch">
-        <Switch/>
+        <NsfwSwitch/>
     </div>
     <form action="/Gallery" method="get">
         <input type="text" name="q" placeholder="Search"/>
diff --git a/Pages/Component/NsfwSwitch.razor b/Pages/Component/NsfwSwitch.razor
new file mode 100644
index 0000000..d4e809b
--- /dev/null
+++ b/Pages/Component/NsfwSwitch.razor
@@ -0,0 +1,8 @@
+@inject IUserStateService userState
+
+<Switch InitialValue=userState.ShowNsfw OnToggle=ToggleNsfw/>
+
+@code {
+    private void ToggleNsfw(bool showNsfw) =>
+        userState.ShowNsfw = showNsfw;
+}
\ No newline at end of file
diff --git a/Pages/Component/Switch.razor b/Pages/Component/Switch.razor
index ffb3543..d11ac81 100644
--- a/Pages/Component/Switch.razor
+++ b/Pages/Component/Switch.razor
@@ -3,6 +3,7 @@
 <label>
   <input
       type="checkbox"
+      checked=@InitialValue
       @onchange=@(e => OnToggle.InvokeAsync((e.Value as bool?) ?? false))
       hidden/>
   <div class="switch-outer">
@@ -11,5 +12,9 @@
 </label>
 
 @code {
+    [Parameter]
+    public bool InitialValue { get; set; } = false;
+
+    [Parameter]
     public EventCallback<bool> OnToggle { get; set; }
 }
diff --git a/Pages/Component/TagSelectDialog.razor b/Pages/Component/TagSelectDialog.razor
index d9e297a..94693e5 100644
--- a/Pages/Component/TagSelectDialog.razor
+++ b/Pages/Component/TagSelectDialog.razor
@@ -1,4 +1,6 @@
 @inject IDbContextFactory<HBContext> dbFactory
+@inject ITagService tagService
+@inject IUserStateService userState
 @implements IDisposable
 
 <link rel="stylesheet" href="@(nameof(HyperBooru)).styles.css"/>
@@ -53,7 +55,10 @@
     public void Show() => Visible = true;
     public void Hide() => Visible = false;
 
-    protected override void OnInitialized() => LoadTags();
+    protected override void OnInitialized() {
+        userState.ShowNsfwChanged += ShowNsfwChanged;
+        LoadTags();
+    }
 
     private void LoadTags() {
         db = dbFactory.CreateDbContext();
@@ -63,6 +68,11 @@
         tagDefinitions = db.TagDefinitions
             .Where(td => td.Source == TagSource.UserTag)
             .OrderBy(td => td.Name)
+            .AsEnumerable()
+            .Where(td => userState.ShowNsfw || !tagService
+                .GetAllTags(td)
+                .Select(e => e.tagDefinition.Guid)
+                .Contains(HBContext.NsfwTag))
             .Select(td => new Tuple<TagDefinition, bool>(
                 td,
                 selected.Contains(td.Guid)).ToValueTuple())
@@ -81,5 +91,11 @@
         StateHasChanged();
     }
 
+    public async void ShowNsfwChanged(object? sender, bool showNsfw) =>
+        await InvokeAsync(() => {
+            LoadTags();
+            StateHasChanged();
+        });
+
     public void Dispose() => db.Dispose();
 }
diff --git a/Pages/Gallery.razor b/Pages/Gallery.razor
index fb58ca0..b07c5e3 100644
--- a/Pages/Gallery.razor
+++ b/Pages/Gallery.razor
@@ -1,7 +1,9 @@
 @page "/"
 @page "/Gallery"
 @inject IDbContextFactory<HBContext> dbFactory
+@inject ITagService tagService
 @inject ISearchService searchService
+@inject IUserStateService userState
 
 <PageTitle>@(Query is null ? "Gallery" : "Search Results")</PageTitle>
 
@@ -29,24 +31,42 @@
 
     private Media[] Media;
 
+    protected override void OnInitialized() =>
+        userState.ShowNsfwChanged += ShowNsfwChanged;
+
     protected override void OnParametersSet() => LoadMedia();
 
     private void LoadMedia() {
         using var db = dbFactory.CreateDbContext();
 
+        IEnumerable<Media> media = db.Media
+            .OrderByDescending(m => m.ObjectId)
+            .ToArray();
+
+        if(Query is not null)
+            media = searchService.Search(Query)
+                .OrderByDescending(m => m.ObjectId);
+
         if(Ingest is not null && Ingest == true) {
-            Media = db.Media
-                .OrderByDescending(m => m.ObjectId)
-                .ToArray()
-                .Where(m => m.IsIngest)
-                .ToArray();
-        } else {
-            if(Query is null)
-                Media = db.Media
-                    .OrderByDescending(m => m.ObjectId)
-                    .ToArray();
-            else
-                Media = searchService.Search(Query);
+            media = media
+                .AsEnumerable()
+                .Where(m => m.IsIngest);
         }
+
+        if(!userState.ShowNsfw)
+            media = media
+                .AsEnumerable()
+                .Where(m => !tagService.GetAllTags(m)
+                    .Select(e => e.tagDefinition.Guid)
+                    .Contains(HBContext.NsfwTag));
+
+        Media = media.ToArray();
+    }
+
+    private async void ShowNsfwChanged(object? sender, bool showNsfw) {
+        await InvokeAsync(() => {
+            LoadMedia();
+            StateHasChanged();
+        });
     }
 }
diff --git a/Pages/TagDefinitions.razor b/Pages/TagDefinitions.razor
index a9e1ebe..7d9c3a1 100644
--- a/Pages/TagDefinitions.razor
+++ b/Pages/TagDefinitions.razor
@@ -1,6 +1,7 @@
 @page "/TagDefinitions"
 @inject IDbContextFactory<HBContext> dbFactory
 @inject ITagService tagService
+@inject IUserStateService userState
 
 <PageTitle>Tag Definitions</PageTitle>
 
@@ -23,7 +24,10 @@
             <td>@tagDef.Name</td>
             <td>
                 <i>
-                    @(string.Join(", ", tagDef.ImplicitTags.Select(it => it.Name).Order()))
+                    @(string.Join(", ", tagDef.ImplicitTags
+                        .Where(it => it.Source == TagSource.UserTag)
+                        .Select(it => it.Name)
+                        .Order()))
                 </i>
             </td>
             <td>
@@ -35,7 +39,7 @@
                 <a href="javascript:;" @onclick=@(() => PromptImplicitTags(tagDef))>
                     Implicit Tags
                 </a>
-                @if(tagDef.ImplicitTags.Select(td => td.Guid).Contains(HBContext.NSFWTag)) {
+                @if(tagDef.ImplicitTags.Select(td => td.Guid).Contains(HBContext.NsfwTag)) {
                     <a href="javascript:;" @onclick=@(() => SetNsfw(tagDef, false))>Make SFW</a>
                 } else {
                     <a href="javascript:;" @onclick=@(() => SetNsfw(tagDef, true))>Make NSFW</a>
@@ -100,8 +104,17 @@
             .Where(td => td.Source == TagSource.UserTag)
             .OrderBy(td => td.Namespace)
             .ThenBy(td => td.Name)
+            .AsEnumerable()
+            .Where(td => userState.ShowNsfw || !tagService
+                .GetAllTags(td)
+                .Select(td => td.tagDefinition.Guid)
+                .Contains(HBContext.NsfwTag))
             .ToArray();
 
+    protected override void OnInitialized() =>
+        userState.ShowNsfwChanged += ShowNsfwChanged;
+
+
     private void CreateTagDefinition() {
         if(string.IsNullOrEmpty(tagNamespace))
             tagNamespace = null;
@@ -155,11 +168,13 @@
     }
 
     private void SetNsfw(TagDefinition tagDef, bool nsfw) {
-        if(nsfw) {
-            tagService.AddTag(tagDef.Guid, HBContext.NSFWTag);
-        } else {
-            tagService.RemoveTag(tagDef.Guid, HBContext.NSFWTag);
-        }
+        if(nsfw)
+            tagService.AddImplicitTag(tagDef.Guid, HBContext.NsfwTag);
+        else
+            tagService.RemoveImplicitTag(tagDef.Guid, HBContext.NsfwTag);
         StateHasChanged();
     }
+
+    private async void ShowNsfwChanged(object? sender, bool showNsfw) =>
+        await InvokeAsync(() => StateHasChanged());
 }
diff --git a/Pages/Upload.razor b/Pages/Upload.razor
index 33153d2..c139aef 100644
--- a/Pages/Upload.razor
+++ b/Pages/Upload.razor
@@ -2,20 +2,10 @@
 
 <link rel="stylesheet" href="@(nameof(HyperBooru)).styles.css"/>
 
-<div id="dropzone" class="@((dropHover ? "drop-hover" : ""))">
-    <InputFile
-        multiple
-        title=""
-        accept="image/*"
-        OnChange=FileInputChange
-        @ondragenter=@(() => dropHover = true)
-        @ondragleave=@(() => dropHover = false)/>
+<div id="dropzone">
     <p>Drag a file to upload it</p>
+    <input type="file" accept="image/*"/>
 </div>
 
 @code {
-    private bool dropHover = false;
-
-    private void FileInputChange(IFileListEntry[] files) {
-    }
 }
\ No newline at end of file
diff --git a/Pages/Upload.razor.css b/Pages/Upload.razor.css
index 4064467..76891de 100644
--- a/Pages/Upload.razor.css
+++ b/Pages/Upload.razor.css
@@ -6,6 +6,7 @@
     position:      relative;
     top:           50%;
     transform:     translate(-50%, -50%);
+    transition:    border-color 0.1s linear;
     width:         700px;
 }
 
@@ -19,10 +20,14 @@ div#dropzone p {
     transform: translate(-50%, -50%);
 }
 
-div#dropzone.drop-hover {
+div#dropzone input {
+    display: none;
+}
+
+div#dropzone:hover {
     border: 3px dashed white;
 }
 
-div#dropzone.drop-hover p {
+div#dropzone:hover p {
     color: white;
 }
\ No newline at end of file
diff --git a/Program.cs b/Program.cs
index 4796825..b5d29af 100644
--- a/Program.cs
+++ b/Program.cs
@@ -19,6 +19,7 @@ public class Program {
         builder.Services.AddDbContextFactory<HBContext>();
         builder.Services.AddScoped<ISearchService, SearchService>();
         builder.Services.AddScoped<ITagService, TagService>();
+        builder.Services.AddSingleton<IUserStateService, UserStateService>();
 
         var app = builder.Build();
 
diff --git a/Services/TagService.cs b/Services/TagService.cs
index 8de52ff..860103b 100644
--- a/Services/TagService.cs
+++ b/Services/TagService.cs
@@ -14,12 +14,18 @@ public interface ITagService {
     public void RemoveTag(HBObject obj, TagDefinition tagDef);
     public void SetImplicitTags(TagDefinition tagDef, TagDefinition[] implicitTagDefs);
     public void SetImplicitTags(Guid tagDef, Guid[] implicitTagDefs);
+    public void AddImplicitTag(Guid tagDef, Guid implicitTagDef);
+    public void AddImplicitTag(TagDefinition tagDef, TagDefinition implicitTagDef);
+    public void RemoveImplicitTag(Guid tagDef, Guid implicitTagDef);
+    public void RemoveImplicitTag(TagDefinition tagDef, TagDefinition implicitTagDef);
     public void CreateTagDefinition(string name, string? @namespace);
+    public void DeleteTagDefinition(Guid tagDef);
     public void DeleteTagDefinition(TagDefinition tagDef);
     public void UpdateTagDefinition(Guid tagDef, string name, string? @namespace);
     public void UpdateTagDefinition(TagDefinition tagDef, string name, string? @namespace);
     public (TagDefinition tagDefinition, bool isImplicit)[] GetAllTags(Guid obj);
     public (TagDefinition tagDefinition, bool isImplicit)[] GetAllTags(HBObject obj);
+    public (TagDefinition tagDefinition, bool isImplicit)[] GetAllTags(TagDefinition tagDef);
 }
 
 public class TagService : ITagService {
@@ -78,6 +84,31 @@ public class TagService : ITagService {
     public void SetImplicitTags(TagDefinition tagDef, TagDefinition[] implicitTagDefs) =>
         SetImplicitTags(tagDef.Guid, implicitTagDefs.Select(td => td.Guid).ToArray());
 
+    public void AddImplicitTag(Guid tagDef, Guid implicitTagDef) {
+        using var db = dbFactory.CreateDbContext();
+
+        var tag = db.TagDefinitions.First(td => td.Guid == tagDef);
+        var implicitTag = db.TagDefinitions.First(td => td.Guid == implicitTagDef);
+
+        tag.ImplicitTags.Add(implicitTag);
+        db.SaveChanges();
+    }
+
+    public void AddImplicitTag(TagDefinition tagDef, TagDefinition implicitTagDef) =>
+        AddImplicitTag(tagDef, implicitTagDef);
+
+    public void RemoveImplicitTag(Guid tagDef, Guid implicitTagDef) {
+        using var db = dbFactory.CreateDbContext();
+
+        var tag = db.TagDefinitions.First(td => td.Guid == tagDef);
+
+        tag.ImplicitTags.RemoveAll(td => td.Guid == implicitTagDef);
+        db.SaveChanges();
+    }
+
+    public void RemoveImplicitTag(TagDefinition tagDef, TagDefinition implicitTagDef) =>
+        RemoveImplicitTag(tagDef, implicitTagDef);
+
     public void CreateTagDefinition(string name, string? @namespace) {
         using var db = dbFactory.CreateDbContext();
 
@@ -91,20 +122,24 @@ public class TagService : ITagService {
         db.SaveChanges();
     }
 
-    public void DeleteTagDefinition(TagDefinition tagDef) {
+    public void DeleteTagDefinition(Guid tagDef) {
         using var db = dbFactory.CreateDbContext();
-        db.Entry(tagDef).State = EntityState.Unchanged;
+
+        var tag = db.TagDefinitions.First(td => td.Guid == tagDef);
 
         using var transaction = db.Database.BeginTransaction();
 
         db.Tags.RemoveRange(
-            db.Tags.Where(t => t.TagDefinition == tagDef));
-        db.TagDefinitions.Remove(tagDef);
+            db.Tags.Where(t => t.TagDefinition.Guid == tagDef));
+        db.TagDefinitions.Remove(tag);
         db.SaveChanges();
 
         transaction.Commit();
     }
 
+    public void DeleteTagDefinition(TagDefinition tagDef) =>
+        DeleteTagDefinition(tagDef.Guid);
+
     public void UpdateTagDefinition(Guid tagDef, string name, string? @namespace) {
         using var db = dbFactory.CreateDbContext();
 
@@ -122,11 +157,6 @@ public class TagService : ITagService {
         UpdateTagDefinition(tagDef.Guid, name, @namespace);
 
     public (TagDefinition tagDefinition, bool isImplicit)[] GetAllTags(Guid obj) {
-        IEnumerable<TagDefinition> GetTagRecursive(IEnumerable<TagDefinition> tagDefs) =>
-            tagDefs
-                .Concat(tagDefs.SelectMany(td => GetTagRecursive(td.ImplicitTags)))
-                .DistinctBy(td => td.Guid);
-
         using var db = dbFactory.CreateDbContext();
         var @object = db.Objects.First(o => o.Guid == obj);
 
@@ -139,4 +169,35 @@ public class TagService : ITagService {
 
     public (TagDefinition tagDefinition, bool isImplicit)[] GetAllTags(HBObject obj) =>
         GetAllTags(obj.Guid);
+
+    public (TagDefinition tagDefinition, bool isImplicit)[] GetAllTags(TagDefinition tagDef) {
+        using var db = dbFactory.CreateDbContext();
+
+        var tag = db.TagDefinitions.First(td => td.Guid == tagDef.Guid);
+
+        return GetTagRecursive(tag.ImplicitTags)
+            .Select(td => new ValueTuple<TagDefinition, bool>(td, !tag.ImplicitTags.Select(it => it.Guid).Contains(td.Guid)))
+            .ToArray();
+    }
+
+    private List<TagDefinition> GetTagRecursive(IEnumerable<TagDefinition> tagDefs) {
+        var tags = new List<TagDefinition>(tagDefs);
+
+        List<TagDefinition>? toProcessNext = null;
+
+        while(true) {
+            toProcessNext = (toProcessNext ?? tags)
+                .SelectMany(td => td.ImplicitTags)
+                .Where(td => !tags.Select(td => td.Guid).Contains(td.Guid))
+                .DistinctBy(td => td.Guid)
+                .ToList();
+
+            tags.AddRange(toProcessNext);
+
+            if(toProcessNext.Count() == 0)
+                break;
+        }
+
+        return tags;
+    }
 }
diff --git a/Services/UserStateService.cs b/Services/UserStateService.cs
new file mode 100644
index 0000000..dc742e1
--- /dev/null
+++ b/Services/UserStateService.cs
@@ -0,0 +1,21 @@
+namespace HyperBooru.Services;
+
+public interface IUserStateService {
+    public bool ShowNsfw { get; set; }
+
+    public event EventHandler<bool> ShowNsfwChanged;
+}
+
+public class UserStateService : IUserStateService {
+    public bool ShowNsfw {
+        get => showNsfw;
+        set {
+            showNsfw = value;
+            ShowNsfwChanged?.Invoke(this, value);
+        }
+    }
+
+    public event EventHandler<bool> ShowNsfwChanged;
+
+    private bool showNsfw = false;
+}
-- 
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