feat(backend): validate custom preferences on save

this is used to validate icons for custom preferences. it generates both
typescript and c# code

.editorconfig

@@ -3,3 +3,6 @@
 resharper_entity_framework_model_validation_unlimited_string_length_highlighting = none
 # This is raised for every single property of records returned by endpoints
 resharper_not_accessed_positional_property_local_highlighting = none
+
+[*generated.cs]
+generated_code = true

Foxnouns.Backend/Controllers/MetaController.cs

@@ -27,7 +27,7 @@ public class MetaController : ApiControllerBase
                 new Limits(
                     MemberCount: MembersController.MaxMemberCount,
                     BioLength: ValidationUtils.MaxBioLength,
-                    CustomPreferences: UsersController.MaxCustomPreferences
+                    CustomPreferences: ValidationUtils.MaxCustomPreferences
                 )
             )
         );

Foxnouns.Backend/Controllers/UsersController.cs

@@ -197,11 +197,11 @@ public class UsersController(
     [Authorize("user.update")]
     [ProducesResponseType<Dictionary<Snowflake, User.CustomPreference>>(StatusCodes.Status200OK)]
     public async Task<IActionResult> UpdateCustomPreferencesAsync(
-        [FromBody] List<CustomPreferencesUpdateRequest> req,
+        [FromBody] List<CustomPreferenceUpdate> req,
         CancellationToken ct = default
     )
     {
-        ValidationUtils.Validate(ValidateCustomPreferences(req));
+        ValidationUtils.Validate(ValidationUtils.ValidateCustomPreferences(req));
 
         var user = await db.ResolveUserAsync(CurrentUser!.Id, ct);
         var preferences = user
@@ -241,7 +241,7 @@ public class UsersController(
     }
 
     [SuppressMessage("ReSharper", "ClassNeverInstantiated.Global")]
-    public class CustomPreferencesUpdateRequest
+    public class CustomPreferenceUpdate
     {
         public Snowflake? Id { get; init; }
         public required string Icon { get; set; }
@@ -251,34 +251,6 @@ public class UsersController(
         public bool Favourite { get; set; }
     }
 
-    public const int MaxCustomPreferences = 25;
-
-    private static List<(string, ValidationError?)> ValidateCustomPreferences(
-        List<CustomPreferencesUpdateRequest> preferences
-    )
-    {
-        var errors = new List<(string, ValidationError?)>();
-
-        if (preferences.Count > MaxCustomPreferences)
-            errors.Add(
-                (
-                    "custom_preferences",
-                    ValidationError.LengthError(
-                        "Too many custom preferences",
-                        0,
-                        MaxCustomPreferences,
-                        preferences.Count
-                    )
-                )
-            );
-        if (preferences.Count > 50)
-            return errors;
-
-        // TODO: validate individual preferences
-
-        return errors;
-    }
-
     public class UpdateUserRequest : PatchRequest
     {
         public string? Username { get; init; }

Foxnouns.Backend/Utils/BootstrapIcons.cs

@@ -0,0 +1,6 @@
+namespace Foxnouns.Backend.Utils;
+
+public static partial class BootstrapIcons
+{
+    public static bool IsValid(string icon) => Icons.Contains(icon);
+}

Foxnouns.Backend/Utils/ValidationUtils.Fields.cs

@@ -0,0 +1,287 @@
+// Copyright (C) 2023-present sam/u1f320 (vulpine.solutions)
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+using Foxnouns.Backend.Database;
+using Foxnouns.Backend.Database.Models;
+
+namespace Foxnouns.Backend.Utils;
+
+public static partial class ValidationUtils
+{
+    private static readonly string[] DefaultStatusOptions =
+    [
+        "favourite",
+        "okay",
+        "jokingly",
+        "friends_only",
+        "avoid",
+    ];
+
+    public static IEnumerable<(string, ValidationError?)> ValidateFields(
+        List<Field>? fields,
+        IReadOnlyDictionary<Snowflake, User.CustomPreference> customPreferences
+    )
+    {
+        if (fields == null)
+            return [];
+
+        var errors = new List<(string, ValidationError?)>();
+        if (fields.Count > 25)
+            errors.Add(
+                (
+                    "fields",
+                    ValidationError.LengthError(
+                        "Too many fields",
+                        0,
+                        Limits.FieldLimit,
+                        fields.Count
+                    )
+                )
+            );
+        // No overwhelming this function, thank you
+        if (fields.Count > 100)
+            return errors;
+
+        foreach (var (field, index) in fields.Select((field, index) => (field, index)))
+        {
+            switch (field.Name.Length)
+            {
+                case > Limits.FieldNameLimit:
+                    errors.Add(
+                        (
+                            $"fields.{index}.name",
+                            ValidationError.LengthError(
+                                "Field name is too long",
+                                1,
+                                Limits.FieldNameLimit,
+                                field.Name.Length
+                            )
+                        )
+                    );
+                    break;
+                case < 1:
+                    errors.Add(
+                        (
+                            $"fields.{index}.name",
+                            ValidationError.LengthError(
+                                "Field name is too short",
+                                1,
+                                Limits.FieldNameLimit,
+                                field.Name.Length
+                            )
+                        )
+                    );
+                    break;
+            }
+
+            errors = errors
+                .Concat(
+                    ValidateFieldEntries(
+                        field.Entries,
+                        customPreferences,
+                        $"fields.{index}.entries"
+                    )
+                )
+                .ToList();
+        }
+
+        return errors;
+    }
+
+    public static IEnumerable<(string, ValidationError?)> ValidateFieldEntries(
+        FieldEntry[]? entries,
+        IReadOnlyDictionary<Snowflake, User.CustomPreference> customPreferences,
+        string errorPrefix = "fields"
+    )
+    {
+        if (entries == null || entries.Length == 0)
+            return [];
+        var errors = new List<(string, ValidationError?)>();
+
+        if (entries.Length > Limits.FieldEntriesLimit)
+            errors.Add(
+                (
+                    errorPrefix,
+                    ValidationError.LengthError(
+                        "Field has too many entries",
+                        0,
+                        Limits.FieldEntriesLimit,
+                        entries.Length
+                    )
+                )
+            );
+
+        // Same as above, no overwhelming this function with a ridiculous amount of entries
+        if (entries.Length > Limits.FieldEntriesLimit + 50)
+            return errors;
+
+        foreach (var (entry, entryIdx) in entries.Select((entry, entryIdx) => (entry, entryIdx)))
+        {
+            switch (entry.Value.Length)
+            {
+                case > Limits.FieldEntryTextLimit:
+                    errors.Add(
+                        (
+                            $"{errorPrefix}.{entryIdx}.value",
+                            ValidationError.LengthError(
+                                "Field value is too long",
+                                1,
+                                Limits.FieldEntryTextLimit,
+                                entry.Value.Length
+                            )
+                        )
+                    );
+                    break;
+                case < 1:
+                    errors.Add(
+                        (
+                            $"{errorPrefix}.{entryIdx}.value",
+                            ValidationError.LengthError(
+                                "Field value is too short",
+                                1,
+                                Limits.FieldEntryTextLimit,
+                                entry.Value.Length
+                            )
+                        )
+                    );
+                    break;
+            }
+
+            var customPreferenceIds = customPreferences?.Keys.Select(id => id.ToString()) ?? [];
+
+            if (
+                !DefaultStatusOptions.Contains(entry.Status)
+                && !customPreferenceIds.Contains(entry.Status)
+            )
+                errors.Add(
+                    (
+                        $"{errorPrefix}.{entryIdx}.status",
+                        ValidationError.GenericValidationError("Invalid status", entry.Status)
+                    )
+                );
+        }
+
+        return errors;
+    }
+
+    public static IEnumerable<(string, ValidationError?)> ValidatePronouns(
+        Pronoun[]? entries,
+        IReadOnlyDictionary<Snowflake, User.CustomPreference> customPreferences,
+        string errorPrefix = "pronouns"
+    )
+    {
+        if (entries == null || entries.Length == 0)
+            return [];
+        var errors = new List<(string, ValidationError?)>();
+
+        if (entries.Length > Limits.FieldEntriesLimit)
+            errors.Add(
+                (
+                    errorPrefix,
+                    ValidationError.LengthError(
+                        "Too many pronouns",
+                        0,
+                        Limits.FieldEntriesLimit,
+                        entries.Length
+                    )
+                )
+            );
+
+        // Same as above, no overwhelming this function with a ridiculous amount of entries
+        if (entries.Length > Limits.FieldEntriesLimit + 50)
+            return errors;
+
+        foreach (var (entry, entryIdx) in entries.Select((entry, entryIdx) => (entry, entryIdx)))
+        {
+            switch (entry.Value.Length)
+            {
+                case > Limits.FieldEntryTextLimit:
+                    errors.Add(
+                        (
+                            $"{errorPrefix}.{entryIdx}.value",
+                            ValidationError.LengthError(
+                                "Pronoun value is too long",
+                                1,
+                                Limits.FieldEntryTextLimit,
+                                entry.Value.Length
+                            )
+                        )
+                    );
+                    break;
+                case < 1:
+                    errors.Add(
+                        (
+                            $"{errorPrefix}.{entryIdx}.value",
+                            ValidationError.LengthError(
+                                "Pronoun value is too short",
+                                1,
+                                Limits.FieldEntryTextLimit,
+                                entry.Value.Length
+                            )
+                        )
+                    );
+                    break;
+            }
+
+            if (entry.DisplayText != null)
+            {
+                switch (entry.DisplayText.Length)
+                {
+                    case > Limits.FieldEntryTextLimit:
+                        errors.Add(
+                            (
+                                $"{errorPrefix}.{entryIdx}.display_text",
+                                ValidationError.LengthError(
+                                    "Pronoun display text is too long",
+                                    1,
+                                    Limits.FieldEntryTextLimit,
+                                    entry.Value.Length
+                                )
+                            )
+                        );
+                        break;
+                    case < 1:
+                        errors.Add(
+                            (
+                                $"{errorPrefix}.{entryIdx}.display_text",
+                                ValidationError.LengthError(
+                                    "Pronoun display text is too short",
+                                    1,
+                                    Limits.FieldEntryTextLimit,
+                                    entry.Value.Length
+                                )
+                            )
+                        );
+                        break;
+                }
+            }
+
+            var customPreferenceIds = customPreferences?.Keys.Select(id => id.ToString()) ?? [];
+
+            if (
+                !DefaultStatusOptions.Contains(entry.Status)
+                && !customPreferenceIds.Contains(entry.Status)
+            )
+                errors.Add(
+                    (
+                        $"{errorPrefix}.{entryIdx}.status",
+                        ValidationError.GenericValidationError("Invalid status", entry.Status)
+                    )
+                );
+        }
+
+        return errors;
+    }
+}

Foxnouns.Backend/Utils/ValidationUtils.Preferences.cs

@@ -0,0 +1,72 @@
+// Copyright (C) 2023-present sam/u1f320 (vulpine.solutions)
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+using Foxnouns.Backend.Controllers;
+
+namespace Foxnouns.Backend.Utils;
+
+public static partial class ValidationUtils
+{
+    public const int MaxCustomPreferences = 25;
+    public const int MaxPreferenceTooltipLength = 128;
+
+    public static List<(string, ValidationError?)> ValidateCustomPreferences(
+        List<UsersController.CustomPreferenceUpdate> preferences
+    )
+    {
+        var errors = new List<(string, ValidationError?)>();
+
+        if (preferences.Count > MaxCustomPreferences)
+            errors.Add(
+                (
+                    "custom_preferences",
+                    ValidationError.LengthError(
+                        "Too many custom preferences",
+                        0,
+                        MaxCustomPreferences,
+                        preferences.Count
+                    )
+                )
+            );
+        if (preferences.Count > 50)
+            return errors;
+
+        foreach (var (p, i) in preferences.Select((p, i) => (p, i)))
+        {
+            if (!BootstrapIcons.IsValid(p.Icon))
+                errors.Add(
+                    (
+                        $"custom_preferences.{i}.icon",
+                        ValidationError.DisallowedValueError("Invalid icon name", [], p.Icon)
+                    )
+                );
+
+            if (p.Tooltip.Length is 1 or > MaxPreferenceTooltipLength)
+                errors.Add(
+                    (
+                        $"custom_preferences.{i}.tooltip",
+                        ValidationError.LengthError(
+                            "Tooltip is too short or too long",
+                            1,
+                            MaxPreferenceTooltipLength,
+                            p.Tooltip.Length
+                        )
+                    )
+                );
+        }
+
+        return errors;
+    }
+}

Foxnouns.Backend/Utils/ValidationUtils.Strings.cs

@@ -0,0 +1,197 @@
+// Copyright (C) 2023-present sam/u1f320 (vulpine.solutions)
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+using System.Text.RegularExpressions;
+
+namespace Foxnouns.Backend.Utils;
+
+public static partial class ValidationUtils
+{
+    private static readonly string[] InvalidUsernames =
+    [
+        "..",
+        "admin",
+        "administrator",
+        "mod",
+        "moderator",
+        "api",
+        "page",
+        "pronouns",
+        "settings",
+        "pronouns.cc",
+        "pronounscc",
+    ];
+
+    private static readonly string[] InvalidMemberNames =
+    [
+        // these break routing outright
+        ".",
+        "..",
+        // the user edit page lives at `/@{username}/edit`, so a member named "edit" would be inaccessible
+        "edit",
+    ];
+
+    public static ValidationError? ValidateUsername(string username)
+    {
+        if (!UsernameRegex().IsMatch(username))
+            return username.Length switch
+            {
+                < 2 => ValidationError.LengthError("Username is too short", 2, 40, username.Length),
+                > 40 => ValidationError.LengthError("Username is too long", 2, 40, username.Length),
+                _ => ValidationError.GenericValidationError(
+                    "Username is invalid, can only contain alphanumeric characters, dashes, underscores, and periods",
+                    username
+                ),
+            };
+
+        if (
+            InvalidUsernames.Any(u =>
+                string.Equals(u, username, StringComparison.InvariantCultureIgnoreCase)
+            )
+        )
+            return ValidationError.GenericValidationError("Username is not allowed", username);
+        return null;
+    }
+
+    public static ValidationError? ValidateMemberName(string memberName)
+    {
+        if (!MemberRegex().IsMatch(memberName))
+            return memberName.Length switch
+            {
+                < 1 => ValidationError.LengthError("Name is too short", 1, 100, memberName.Length),
+                > 100 => ValidationError.LengthError("Name is too long", 1, 100, memberName.Length),
+                _ => ValidationError.GenericValidationError(
+                    "Member name cannot contain any of the following: "
+                        + " @, ?, !, #, /, \\, [, ], \", ', $, %, &, (, ), {, }, +, <, =, >, ^, |, ~, `, , "
+                        + "and cannot be one or two periods",
+                    memberName
+                ),
+            };
+
+        if (
+            InvalidMemberNames.Any(u =>
+                string.Equals(u, memberName, StringComparison.InvariantCultureIgnoreCase)
+            )
+        )
+            return ValidationError.GenericValidationError("Name is not allowed", memberName);
+        return null;
+    }
+
+    public static ValidationError? ValidateDisplayName(string? displayName)
+    {
+        return displayName?.Length switch
+        {
+            0 => ValidationError.LengthError(
+                "Display name is too short",
+                1,
+                100,
+                displayName.Length
+            ),
+            > 100 => ValidationError.LengthError(
+                "Display name is too long",
+                1,
+                100,
+                displayName.Length
+            ),
+            _ => null,
+        };
+    }
+
+    private const int MaxLinks = 25;
+    private const int MaxLinkLength = 256;
+
+    public static IEnumerable<(string, ValidationError?)> ValidateLinks(string[]? links)
+    {
+        if (links == null)
+            return [];
+        if (links.Length > MaxLinks)
+            return
+            [
+                ("links", ValidationError.LengthError("Too many links", 0, MaxLinks, links.Length)),
+            ];
+
+        var errors = new List<(string, ValidationError?)>();
+        foreach (var (link, idx) in links.Select((l, i) => (l, i)))
+        {
+            switch (link.Length)
+            {
+                case 0:
+                    errors.Add(
+                        (
+                            $"links.{idx}",
+                            ValidationError.LengthError("Link cannot be empty", 1, 256, 0)
+                        )
+                    );
+                    break;
+                case > MaxLinkLength:
+                    errors.Add(
+                        (
+                            $"links.{idx}",
+                            ValidationError.LengthError(
+                                "Link is too long",
+                                1,
+                                MaxLinkLength,
+                                link.Length
+                            )
+                        )
+                    );
+                    break;
+            }
+        }
+
+        return errors;
+    }
+
+    public const int MaxBioLength = 1024;
+    public const int MaxAvatarLength = 1_500_000;
+
+    public static ValidationError? ValidateBio(string? bio)
+    {
+        return bio?.Length switch
+        {
+            0 => ValidationError.LengthError("Bio is too short", 1, MaxBioLength, bio.Length),
+            > MaxBioLength => ValidationError.LengthError(
+                "Bio is too long",
+                1,
+                MaxBioLength,
+                bio.Length
+            ),
+            _ => null,
+        };
+    }
+
+    public static ValidationError? ValidateAvatar(string? avatar)
+    {
+        return avatar?.Length switch
+        {
+            0 => ValidationError.GenericValidationError("Avatar cannot be empty", null),
+            > MaxAvatarLength => ValidationError.GenericValidationError(
+                "Avatar is too large",
+                null
+            ),
+            _ => null,
+        };
+    }
+
+    [GeneratedRegex(@"^[a-zA-Z_0-9\-\.]{2,40}$", RegexOptions.IgnoreCase, "en-NL")]
+    private static partial Regex UsernameRegex();
+
+    [GeneratedRegex(
+        """^[^@'$%&()+<=>^|~`,*!#/\\\[\]""\{\}\?]{1,100}$""",
+        RegexOptions.IgnoreCase,
+        "en-NL"
+    )]
+    private static partial Regex MemberRegex();
+}

Foxnouns.Backend/Utils/ValidationUtils.cs

@@ -1,7 +1,3 @@
-using System.Text.RegularExpressions;
-using Foxnouns.Backend.Database;
-using Foxnouns.Backend.Database.Models;
-
 namespace Foxnouns.Backend.Utils;
 
 /// <summary>
@@ -9,76 +5,6 @@ namespace Foxnouns.Backend.Utils;
 /// </summary>
 public static partial class ValidationUtils
 {
-    private static readonly string[] InvalidUsernames =
-    [
-        "..",
-        "admin",
-        "administrator",
-        "mod",
-        "moderator",
-        "api",
-        "page",
-        "pronouns",
-        "settings",
-        "pronouns.cc",
-        "pronounscc",
-    ];
-
-    private static readonly string[] InvalidMemberNames =
-    [
-        // these break routing outright
-        ".",
-        "..",
-        // the user edit page lives at `/@{username}/edit`, so a member named "edit" would be inaccessible
-        "edit",
-    ];
-
-    public static ValidationError? ValidateUsername(string username)
-    {
-        if (!UsernameRegex().IsMatch(username))
-            return username.Length switch
-            {
-                < 2 => ValidationError.LengthError("Username is too short", 2, 40, username.Length),
-                > 40 => ValidationError.LengthError("Username is too long", 2, 40, username.Length),
-                _ => ValidationError.GenericValidationError(
-                    "Username is invalid, can only contain alphanumeric characters, dashes, underscores, and periods",
-                    username
-                ),
-            };
-
-        if (
-            InvalidUsernames.Any(u =>
-                string.Equals(u, username, StringComparison.InvariantCultureIgnoreCase)
-            )
-        )
-            return ValidationError.GenericValidationError("Username is not allowed", username);
-        return null;
-    }
-
-    public static ValidationError? ValidateMemberName(string memberName)
-    {
-        if (!MemberRegex().IsMatch(memberName))
-            return memberName.Length switch
-            {
-                < 1 => ValidationError.LengthError("Name is too short", 1, 100, memberName.Length),
-                > 100 => ValidationError.LengthError("Name is too long", 1, 100, memberName.Length),
-                _ => ValidationError.GenericValidationError(
-                    "Member name cannot contain any of the following: "
-                        + " @, ?, !, #, /, \\, [, ], \", ', $, %, &, (, ), {, }, +, <, =, >, ^, |, ~, `, , "
-                        + "and cannot be one or two periods",
-                    memberName
-                ),
-            };
-
-        if (
-            InvalidMemberNames.Any(u =>
-                string.Equals(u, memberName, StringComparison.InvariantCultureIgnoreCase)
-            )
-        )
-            return ValidationError.GenericValidationError("Name is not allowed", memberName);
-        return null;
-    }
-
     public static void Validate(IEnumerable<(string, ValidationError?)> errors)
     {
         errors = errors.Where(e => e.Item2 != null).ToList();
@@ -95,375 +21,4 @@ public static partial class ValidationUtils
 
         throw new ApiError.BadRequest("Error validating input", errorDict);
     }
-
-    public static ValidationError? ValidateDisplayName(string? displayName)
-    {
-        return displayName?.Length switch
-        {
-            0 => ValidationError.LengthError(
-                "Display name is too short",
-                1,
-                100,
-                displayName.Length
-            ),
-            > 100 => ValidationError.LengthError(
-                "Display name is too long",
-                1,
-                100,
-                displayName.Length
-            ),
-            _ => null,
-        };
-    }
-
-    private const int MaxLinks = 25;
-    private const int MaxLinkLength = 256;
-
-    public static IEnumerable<(string, ValidationError?)> ValidateLinks(string[]? links)
-    {
-        if (links == null)
-            return [];
-        if (links.Length > MaxLinks)
-            return
-            [
-                ("links", ValidationError.LengthError("Too many links", 0, MaxLinks, links.Length)),
-            ];
-
-        var errors = new List<(string, ValidationError?)>();
-        foreach (var (link, idx) in links.Select((l, i) => (l, i)))
-        {
-            switch (link.Length)
-            {
-                case 0:
-                    errors.Add(
-                        (
-                            $"links.{idx}",
-                            ValidationError.LengthError("Link cannot be empty", 1, 256, 0)
-                        )
-                    );
-                    break;
-                case > MaxLinkLength:
-                    errors.Add(
-                        (
-                            $"links.{idx}",
-                            ValidationError.LengthError(
-                                "Link is too long",
-                                1,
-                                MaxLinkLength,
-                                link.Length
-                            )
-                        )
-                    );
-                    break;
-            }
-        }
-
-        return errors;
-    }
-
-    public const int MaxBioLength = 1024;
-    public const int MaxAvatarLength = 1_500_000;
-
-    public static ValidationError? ValidateBio(string? bio)
-    {
-        return bio?.Length switch
-        {
-            0 => ValidationError.LengthError("Bio is too short", 1, MaxBioLength, bio.Length),
-            > MaxBioLength => ValidationError.LengthError(
-                "Bio is too long",
-                1,
-                MaxBioLength,
-                bio.Length
-            ),
-            _ => null,
-        };
-    }
-
-    public static ValidationError? ValidateAvatar(string? avatar)
-    {
-        return avatar?.Length switch
-        {
-            0 => ValidationError.GenericValidationError("Avatar cannot be empty", null),
-            > MaxAvatarLength => ValidationError.GenericValidationError(
-                "Avatar is too large",
-                null
-            ),
-            _ => null,
-        };
-    }
-
-    private static readonly string[] DefaultStatusOptions =
-    [
-        "favourite",
-        "okay",
-        "jokingly",
-        "friends_only",
-        "avoid",
-    ];
-
-    public static IEnumerable<(string, ValidationError?)> ValidateFields(
-        List<Field>? fields,
-        IReadOnlyDictionary<Snowflake, User.CustomPreference> customPreferences
-    )
-    {
-        if (fields == null)
-            return [];
-
-        var errors = new List<(string, ValidationError?)>();
-        if (fields.Count > 25)
-            errors.Add(
-                (
-                    "fields",
-                    ValidationError.LengthError(
-                        "Too many fields",
-                        0,
-                        Limits.FieldLimit,
-                        fields.Count
-                    )
-                )
-            );
-        // No overwhelming this function, thank you
-        if (fields.Count > 100)
-            return errors;
-
-        foreach (var (field, index) in fields.Select((field, index) => (field, index)))
-        {
-            switch (field.Name.Length)
-            {
-                case > Limits.FieldNameLimit:
-                    errors.Add(
-                        (
-                            $"fields.{index}.name",
-                            ValidationError.LengthError(
-                                "Field name is too long",
-                                1,
-                                Limits.FieldNameLimit,
-                                field.Name.Length
-                            )
-                        )
-                    );
-                    break;
-                case < 1:
-                    errors.Add(
-                        (
-                            $"fields.{index}.name",
-                            ValidationError.LengthError(
-                                "Field name is too short",
-                                1,
-                                Limits.FieldNameLimit,
-                                field.Name.Length
-                            )
-                        )
-                    );
-                    break;
-            }
-
-            errors = errors
-                .Concat(
-                    ValidateFieldEntries(
-                        field.Entries,
-                        customPreferences,
-                        $"fields.{index}.entries"
-                    )
-                )
-                .ToList();
-        }
-
-        return errors;
-    }
-
-    public static IEnumerable<(string, ValidationError?)> ValidateFieldEntries(
-        FieldEntry[]? entries,
-        IReadOnlyDictionary<Snowflake, User.CustomPreference> customPreferences,
-        string errorPrefix = "fields"
-    )
-    {
-        if (entries == null || entries.Length == 0)
-            return [];
-        var errors = new List<(string, ValidationError?)>();
-
-        if (entries.Length > Limits.FieldEntriesLimit)
-            errors.Add(
-                (
-                    errorPrefix,
-                    ValidationError.LengthError(
-                        "Field has too many entries",
-                        0,
-                        Limits.FieldEntriesLimit,
-                        entries.Length
-                    )
-                )
-            );
-
-        // Same as above, no overwhelming this function with a ridiculous amount of entries
-        if (entries.Length > Limits.FieldEntriesLimit + 50)
-            return errors;
-
-        foreach (var (entry, entryIdx) in entries.Select((entry, entryIdx) => (entry, entryIdx)))
-        {
-            switch (entry.Value.Length)
-            {
-                case > Limits.FieldEntryTextLimit:
-                    errors.Add(
-                        (
-                            $"{errorPrefix}.{entryIdx}.value",
-                            ValidationError.LengthError(
-                                "Field value is too long",
-                                1,
-                                Limits.FieldEntryTextLimit,
-                                entry.Value.Length
-                            )
-                        )
-                    );
-                    break;
-                case < 1:
-                    errors.Add(
-                        (
-                            $"{errorPrefix}.{entryIdx}.value",
-                            ValidationError.LengthError(
-                                "Field value is too short",
-                                1,
-                                Limits.FieldEntryTextLimit,
-                                entry.Value.Length
-                            )
-                        )
-                    );
-                    break;
-            }
-
-            var customPreferenceIds = customPreferences?.Keys.Select(id => id.ToString()) ?? [];
-
-            if (
-                !DefaultStatusOptions.Contains(entry.Status)
-                && !customPreferenceIds.Contains(entry.Status)
-            )
-                errors.Add(
-                    (
-                        $"{errorPrefix}.{entryIdx}.status",
-                        ValidationError.GenericValidationError("Invalid status", entry.Status)
-                    )
-                );
-        }
-
-        return errors;
-    }
-
-    public static IEnumerable<(string, ValidationError?)> ValidatePronouns(
-        Pronoun[]? entries,
-        IReadOnlyDictionary<Snowflake, User.CustomPreference> customPreferences,
-        string errorPrefix = "pronouns"
-    )
-    {
-        if (entries == null || entries.Length == 0)
-            return [];
-        var errors = new List<(string, ValidationError?)>();
-
-        if (entries.Length > Limits.FieldEntriesLimit)
-            errors.Add(
-                (
-                    errorPrefix,
-                    ValidationError.LengthError(
-                        "Too many pronouns",
-                        0,
-                        Limits.FieldEntriesLimit,
-                        entries.Length
-                    )
-                )
-            );
-
-        // Same as above, no overwhelming this function with a ridiculous amount of entries
-        if (entries.Length > Limits.FieldEntriesLimit + 50)
-            return errors;
-
-        foreach (var (entry, entryIdx) in entries.Select((entry, entryIdx) => (entry, entryIdx)))
-        {
-            switch (entry.Value.Length)
-            {
-                case > Limits.FieldEntryTextLimit:
-                    errors.Add(
-                        (
-                            $"{errorPrefix}.{entryIdx}.value",
-                            ValidationError.LengthError(
-                                "Pronoun value is too long",
-                                1,
-                                Limits.FieldEntryTextLimit,
-                                entry.Value.Length
-                            )
-                        )
-                    );
-                    break;
-                case < 1:
-                    errors.Add(
-                        (
-                            $"{errorPrefix}.{entryIdx}.value",
-                            ValidationError.LengthError(
-                                "Pronoun value is too short",
-                                1,
-                                Limits.FieldEntryTextLimit,
-                                entry.Value.Length
-                            )
-                        )
-                    );
-                    break;
-            }
-
-            if (entry.DisplayText != null)
-            {
-                switch (entry.DisplayText.Length)
-                {
-                    case > Limits.FieldEntryTextLimit:
-                        errors.Add(
-                            (
-                                $"{errorPrefix}.{entryIdx}.display_text",
-                                ValidationError.LengthError(
-                                    "Pronoun display text is too long",
-                                    1,
-                                    Limits.FieldEntryTextLimit,
-                                    entry.Value.Length
-                                )
-                            )
-                        );
-                        break;
-                    case < 1:
-                        errors.Add(
-                            (
-                                $"{errorPrefix}.{entryIdx}.display_text",
-                                ValidationError.LengthError(
-                                    "Pronoun display text is too short",
-                                    1,
-                                    Limits.FieldEntryTextLimit,
-                                    entry.Value.Length
-                                )
-                            )
-                        );
-                        break;
-                }
-            }
-
-            var customPreferenceIds = customPreferences?.Keys.Select(id => id.ToString()) ?? [];
-
-            if (
-                !DefaultStatusOptions.Contains(entry.Status)
-                && !customPreferenceIds.Contains(entry.Status)
-            )
-                errors.Add(
-                    (
-                        $"{errorPrefix}.{entryIdx}.status",
-                        ValidationError.GenericValidationError("Invalid status", entry.Status)
-                    )
-                );
-        }
-
-        return errors;
-    }
-
-    [GeneratedRegex(@"^[a-zA-Z_0-9\-\.]{2,40}$", RegexOptions.IgnoreCase, "en-NL")]
-    private static partial Regex UsernameRegex();
-
-    [GeneratedRegex(
-        """^[^@'$%&()+<=>^|~`,*!#/\\\[\]""\{\}\?]{1,100}$""",
-        RegexOptions.IgnoreCase,
-        "en-NL"
-    )]
-    private static partial Regex MemberRegex();
 }

Foxnouns.Frontend/.prettierignore

@@ -2,3 +2,4 @@
 package-lock.json
 pnpm-lock.yaml
 yarn.lock
+src/lib/icons.ts

Foxnouns.Frontend/icons.js

@@ -0,0 +1,42 @@
+// This script regenerates the list of icons for the frontend (Foxnouns.Frontend/src/lib/icons.ts)
+// and the backend (Foxnouns.Backend/Utils/BootstrapIcons.Icons.cs) from the currently installed version of Bootstrap Icons.
+// Run with `pnpm node icons.js` in the frontend directory.
+
+import { writeFileSync } from "fs";
+import icons from "bootstrap-icons/font/bootstrap-icons.json" with { type: "json" };
+
+const keys = Object.keys(icons);
+
+console.log(`Found ${keys.length} icons`);
+const output = JSON.stringify(keys);
+console.log(`Saving file as src/icons.ts`);
+
+writeFileSync(
+	"src/lib/icons.ts",
+	`// Generated code: DO NOT EDIT\n\nconst icons = ${output};\nexport default icons;`,
+);
+
+const csCode1 = `// <auto-generated />
+
+namespace Foxnouns.Backend.Utils;
+
+public static partial class BootstrapIcons
+{
+    private static readonly HashSet<string> Icons =
+    [
+`;
+
+const csCode2 = `    ];
+}
+`;
+
+let csOutput = csCode1;
+
+keys.forEach((element) => {
+	csOutput += `        "${element}",\n`;
+});
+
+csOutput += csCode2;
+
+console.log("Writing C# code");
+writeFileSync("../Foxnouns.Backend/Utils/BootstrapIcons.Icons.generated.cs", csOutput);

Foxnouns.Frontend/src/lib/components/editor/FieldEditor.svelte

@@ -2,14 +2,25 @@
 	import type { CustomPreference, FieldEntry } from "$api/models";
 	import IconButton from "$components/IconButton.svelte";
 	import { t } from "$lib/i18n";
+	import { InputGroup, InputGroupText } from "@sveltestrap/sveltestrap";
 	import FieldEntryEditor from "./FieldEntryEditor.svelte";
 
 	type Props = {
 		name: string;
 		entries: FieldEntry[];
 		allPreferences: Record<string, CustomPreference>;
+		index?: number;
+		move?: (index: number, up: boolean) => void;
+		remove?: (index: number) => void;
 	};
-	let { name, entries = $bindable(), allPreferences }: Props = $props();
+	let {
+		name = $bindable(),
+		entries = $bindable(),
+		allPreferences,
+		index,
+		move,
+		remove,
+	}: Props = $props();
 
 	let newEntry = $state("");
 
@@ -38,19 +49,45 @@
 	};
 </script>
 
-<h4>{name}</h4>
-
-{#each entries as _, index}
-	<FieldEntryEditor
-		{index}
-		bind:value={entries[index]}
-		{allPreferences}
-		{moveValue}
-		{removeValue}
+{#if index !== undefined && move && remove}
+	<div class="d-flex">
+		<InputGroup>
+			<IconButton
+				icon="chevron-up"
+				color="secondary"
+				tooltip={$t("editor.move-field-up")}
+				onclick={() => move(index, true)}
 			/>
+			<IconButton
+				icon="chevron-down"
+				color="secondary"
+				tooltip={$t("editor.move-field-down")}
+				onclick={() => move(index, false)}
+			/>
+			<InputGroupText>{$t("editor.field-name")}</InputGroupText>
+			<input class="form-control" bind:value={name} />
+			<IconButton
+				color="danger"
+				icon="trash3"
+				tooltip={$t("editor.remove-field")}
+				onclick={() => remove(index)}
+			/>
+		</InputGroup>
+	</div>
+{:else}
+	<h4>{name}</h4>
+{/if}
+
+{#each entries as _, i}
+	<FieldEntryEditor index={i} bind:value={entries[i]} {allPreferences} {moveValue} {removeValue} />
 {/each}
 
 <form class="input-group m-1" onsubmit={addEntry}>
-	<input type="text" class="form-control" bind:value={newEntry} />
+	<input
+		type="text"
+		class="form-control"
+		bind:value={newEntry}
+		placeholder={$t("editor.new-entry")}
+	/>
 	<IconButton type="submit" color="success" icon="plus" tooltip={$t("editor.add-entry")} />
 </form>

Foxnouns.Frontend/src/lib/components/editor/FieldEntryEditor.svelte

@@ -38,7 +38,7 @@
 		icon="chevron-down"
 		color="secondary"
 		tooltip={$t("editor.move-entry-down")}
-		onclick={() => moveValue(index, true)}
+		onclick={() => moveValue(index, false)}
 	/>
 	<input type="text" class="form-control" bind:value={value.value} />
 	<ButtonDropdown>

Foxnouns.Frontend/src/lib/components/editor/FieldsEditor.svelte

@@ -0,0 +1,79 @@
+<script lang="ts">
+	import type { RawApiError } from "$api/error";
+	import type { CustomPreference, Field } from "$api/models";
+	import IconButton from "$components/IconButton.svelte";
+	import { t } from "$lib/i18n";
+	import FieldEditor from "./FieldEditor.svelte";
+	import FormStatusMarker from "./FormStatusMarker.svelte";
+	import NoscriptWarning from "./NoscriptWarning.svelte";
+
+	type Props = {
+		fields: Field[];
+		ok: { ok: boolean; error: RawApiError | null } | null;
+		allPreferences: Record<string, CustomPreference>;
+		update: () => Promise<void>;
+	};
+
+	let { fields = $bindable(), ok, allPreferences, update }: Props = $props();
+
+	let newFieldName = $state("");
+
+	const moveField = (index: number, up: boolean) => {
+		if (up && index == 0) return;
+		if (!up && index == fields.length - 1) return;
+
+		const newIndex = up ? index - 1 : index + 1;
+		const temp = fields[index];
+		fields[index] = fields[newIndex];
+		fields[newIndex] = temp;
+		fields = [...fields];
+	};
+
+	const removeField = (index: number) => {
+		fields.splice(index, 1);
+		fields = [...fields];
+	};
+
+	const addField = (event: Event) => {
+		event.preventDefault();
+		if (!newFieldName) return;
+
+		fields = [...fields, { name: newFieldName, entries: [] }];
+		newFieldName = "";
+	};
+</script>
+
+<NoscriptWarning />
+<FormStatusMarker form={ok} />
+
+<h4>{$t("edit-profile.editing-fields-header")}</h4>
+
+<div>
+	<h5>{$t("editor.add-field")}</h5>
+	<form class="input-group m-1" onsubmit={addField}>
+		<input
+			type="text"
+			class="form-control"
+			bind:value={newFieldName}
+			placeholder={$t("editor.field-name")}
+		/>
+		<IconButton type="submit" color="success" icon="plus" tooltip={$t("editor.add-field")} />
+	</form>
+</div>
+
+{#if fields.length > 0}
+	<hr />
+	{#each fields as field, index}
+		<FieldEditor
+			{index}
+			bind:name={field.name}
+			bind:entries={field.entries}
+			{allPreferences}
+			move={moveField}
+			remove={removeField}
+		/>
+	{/each}
+{/if}
+<div>
+	<button class="btn btn-primary" onclick={() => update()}>{$t("save-changes")}</button>
+</div>

Foxnouns.Frontend/src/lib/i18n/locales/en.json

@@ -133,7 +133,8 @@
     "unlisted-label": "Hide from member list",
     "unlisted-note": "This only hides this member from your public member list. They will still be visible to anyone at this link:",
     "edit-names-pronouns-header": "Edit names and pronouns",
-		"back-to-profile-tab": "Back to profile"
+    "back-to-profile-tab": "Back to profile",
+    "editing-fields-header": "Editing fields"
   },
   "save-changes": "Save changes",
   "change": "Change",
@@ -145,6 +146,12 @@
     "change-display-text": "Change display text",
     "display-text-example": "Optional display text (e.g. it/its)",
     "display-text-label": "Display text",
-		"display-text-info": "This is the short text shown on your profile page. If you leave it empty, it will default to the first two forms of the full set."
+    "display-text-info": "This is the short text shown on your profile page. If you leave it empty, it will default to the first two forms of the full set.",
+    "move-field-up": "Move field up",
+    "move-field-down": "Move field down",
+    "remove-field": "Remove field",
+    "field-name": "Field name",
+    "add-field": "Add field",
+    "new-entry": "New entry"
   }
 }

Foxnouns.Frontend/src/routes/settings/members/[id]/names-pronouns/+page.svelte

@@ -5,6 +5,7 @@
 	import { mergePreferences } from "$api/models/user";
 	import FieldEditor from "$components/editor/FieldEditor.svelte";
 	import FormStatusMarker from "$components/editor/FormStatusMarker.svelte";
+	import NoscriptWarning from "$components/editor/NoscriptWarning.svelte";
 	import PronounsEditor from "$components/editor/PronounsEditor.svelte";
 	import { t } from "$lib/i18n";
 	import log from "$lib/log";
@@ -37,16 +38,15 @@
 	};
 </script>
 
+<NoscriptWarning />
 <FormStatusMarker form={ok} />
 
 <div>
 	<FieldEditor name={$t("profile.names-header")} bind:entries={names} {allPreferences} />
 </div>
-
 <div>
 	<PronounsEditor bind:entries={pronouns} {allPreferences} />
 </div>
-
 <div>
 	<button class="btn btn-primary" onclick={() => update()}>{$t("save-changes")}</button>
 </div>

Foxnouns.Frontend/src/routes/settings/profile/fields/+page.svelte

@@ -0,0 +1,32 @@
+<script lang="ts">
+	import { apiRequest } from "$api";
+	import ApiError, { type RawApiError } from "$api/error";
+	import { mergePreferences, type User } from "$api/models/user";
+	import FieldsEditor from "$components/editor/FieldsEditor.svelte";
+	import log from "$lib/log";
+	import type { PageData } from "./$types";
+
+	type Props = { data: PageData };
+	let { data }: Props = $props();
+
+	let fields = $state(data.user.fields);
+	let ok: { ok: boolean; error: RawApiError | null } | null = $state(null);
+	let allPreferences = $derived(mergePreferences(data.user.custom_preferences));
+
+	const update = async () => {
+		try {
+			const resp = await apiRequest<User>("PATCH", "/users/@me", {
+				body: { fields },
+				token: data.token,
+			});
+			fields = resp.fields;
+			ok = { ok: true, error: null };
+		} catch (e) {
+			ok = { ok: false, error: null };
+			log.error("Could not update fields:", e);
+			if (e instanceof ApiError) ok.error = e.obj;
+		}
+	};
+</script>
+
+<FieldsEditor {fields} {ok} {allPreferences} {update} />

Foxnouns.Frontend/src/routes/settings/profile/names-pronouns/+page.svelte

@@ -4,6 +4,7 @@
 	import { mergePreferences, type User } from "$api/models/user";
 	import FieldEditor from "$components/editor/FieldEditor.svelte";
 	import FormStatusMarker from "$components/editor/FormStatusMarker.svelte";
+	import NoscriptWarning from "$components/editor/NoscriptWarning.svelte";
 	import PronounsEditor from "$components/editor/PronounsEditor.svelte";
 	import { t } from "$lib/i18n";
 	import log from "$lib/log";
@@ -14,9 +15,7 @@
 
 	let names = $state(data.user.names);
 	let pronouns = $state(data.user.pronouns);
-
 	let ok: { ok: boolean; error: RawApiError | null } | null = $state(null);
-
 	let allPreferences = $derived(mergePreferences(data.user.custom_preferences));
 
 	const update = async () => {
@@ -36,16 +35,15 @@
 	};
 </script>
 
+<NoscriptWarning />
 <FormStatusMarker form={ok} />
 
 <div>
 	<FieldEditor name={$t("profile.names-header")} bind:entries={names} {allPreferences} />
 </div>
-
 <div>
 	<PronounsEditor bind:entries={pronouns} {allPreferences} />
 </div>
-
 <div>
 	<button class="btn btn-primary" onclick={() => update()}>{$t("save-changes")}</button>
 </div>

README.md

@@ -1,6 +1,6 @@
 # Foxnouns.NET
 
-Rewrite of pronouns.cc's codebase in C#, using Remix for the frontend.
+Rewrite of pronouns.cc's codebase in C#, using SvelteKit for the frontend.
 Still very work-in-progress, but a large portion of the backend is functional.
 
 ## License