Feature: Implement modals (#2087)

* Implement Modals (#428)

* Socket Modal Support

* fix shareded client support

* Properly use `HasResponded` instead of `_hasResponded`

* `ModalBuilder` and `TextInputBuilder` validation.

* make orginisation more consistant.

* Rest Modals.

* Docs + add missing methods

* fix message signatures and missing abstract members

* modal changes

* um?????

* update modal docs

* update docs - again for some reason

* cleanup

* fix message signatures

* add modal commands support to interaction service

* Fix _hasResponded

* update to new unsupported standard.

* Sending modals with Interaction service.

* fix spelling in ComponentBuilder

* sending IModals when responding to interactions

* interaction service modals

* fix rest modals

* spelling and minor improvements.

* improve interaction service modal proformance

* use precompiled lambda for interaction service modals

* respect user compiled lambda choice

* changes to modals in the interaction service (more)

* support compiled lambdas in modal properties.

* modal interactions tweaks

* fix inline doc

* more modal docs

* configure responce to faild modal component

* init

* solve runtime errors

* solve build errors

* add default value parsing

* make modal info caching static

* make ModalUtils static

* add inline docs

* fix build errors

* code cleanup

* Introduce Required and Label properties as seperate attributes.

* replace internal dictionary of ModalInfo with a list

* change input building logic of modals

* update RespondWithModalAsync method

* add initial value parameter back to ModalTextInput and fix optional modal field

* add missing inline docs

* dispose the reference modal instance after building

* code cleanup on modalcommandbuilder

* Update docs/guides/int_basics/message-components/text-input.md

Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* Update docs/guides/int_basics/message-components/text-input.md

Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* Update docs/guides/int_basics/modals/intro.md

Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* Update docs/guides/int_basics/modals/intro.md

Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* Update docs/guides/int_basics/modals/intro.md

Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* Update docs/guides/int_basics/modals/intro.md

Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* Update docs/guides/int_basics/modals/intro.md

Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* Update docs/guides/int_basics/modals/intro.md

Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* Update docs/guides/int_basics/modals/intro.md

Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* Update docs/guides/int_framework/intro.md

Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* Update docs/guides/int_framework/intro.md

Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* Update docs/guides/int_framework/samples/intro/modal.cs

Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* Update src/Discord.Net.Core/Entities/Interactions/MessageComponents/IComponentInteractionData.cs

Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* Update src/Discord.Net.Core/Entities/Interactions/MessageComponents/TextInputComponent.cs

Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* Update src/Discord.Net.Core/Entities/Interactions/Modals/IModalInteraction.cs

Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* Update src/Discord.Net.Core/Entities/Interactions/Modals/ModalBuilder.cs

Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* Update src/Discord.Net.Core/Entities/Interactions/Modals/ModalBuilder.cs

Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* Update src/Discord.Net.Core/Entities/Interactions/Modals/ModalBuilder.cs

Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* Update src/Discord.Net.Core/Entities/Interactions/Modals/ModalBuilder.cs

Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* Update src/Discord.Net.Core/Entities/Interactions/Modals/ModalBuilder.cs

Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* Update src/Discord.Net.Core/Entities/Interactions/Modals/ModalBuilder.cs

Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* Update src/Discord.Net.Interactions/Attributes/Commands/ModalInteractionAttribute.cs

Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* Update src/Discord.Net.Interactions/Attributes/Modals/RequiredInputAttribute.cs

Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* Update src/Discord.Net.Interactions/InteractionServiceConfig.cs

Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* Update src/Discord.Net.WebSocket/Entities/Interaction/MessageComponents/SocketMessageComponentData.cs

Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* Update src/Discord.Net.WebSocket/Entities/Interaction/Modals/SocketModalData.cs

Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* update interaction service modal docs

* implements ExitOnMissingmModalField config option and adds Type field to modal info

* Add WithValue to text input builders

* Fix rare NRE on component enumeration

* Fix RequestOptions being required in some methods

* Use 'OfType' instead of 'Where'

* Remove android unsported warning

* Change publicity of properties in IInputComponeontBuilder.cs

Co-authored-by: Cenk Ergen <57065323+Cenngo@users.noreply.github.com>
Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

* Remove complex parameter ref

Co-authored-by: CottageDwellingCat <80918250+CottageDwellingCat@users.noreply.github.com>
Co-authored-by: Cenk Ergen <57065323+Cenngo@users.noreply.github.com>
Co-authored-by: Jared L <48422312+lhjt@users.noreply.github.com>

src/Discord.Net.Interactions/Extensions/IDiscordInteractionExtensions.cs

@@ -0,0 +1,37 @@
+using System;
+using System.Threading.Tasks;
+
+namespace Discord.Interactions
+{
+    public static class IDiscordInteractionExtentions
+    {
+        /// <summary>
+        ///     Respond to an interaction with a <see cref="IModal"/>.
+        /// </summary>
+        /// <typeparam name="T">Type of the <see cref="IModal"/> implementation.</typeparam>
+        /// <param name="interaction">The interaction to respond to.</param>
+        /// <param name="options">The request options for this <see langword="async"/> request.</param>
+        /// <returns>A task that represents the asynchronous operation of responding to the interaction.</returns>
+        public static async Task RespondWithModalAsync<T>(this IDiscordInteraction interaction, string customId, RequestOptions options = null)
+            where T : class, IModal
+        {
+            if (!ModalUtils.TryGet<T>(out var modalInfo))
+                throw new ArgumentException($"{typeof(T).FullName} isn't referenced by any registered Modal Interaction Command and doesn't have a cached {typeof(ModalInfo)}");
+
+            var builder = new ModalBuilder(modalInfo.Title, customId);
+
+            foreach(var input in modalInfo.Components)
+                switch (input)
+                {
+                    case TextInputComponentInfo textComponent:
+                        builder.AddTextInput(textComponent.Label, textComponent.CustomId, textComponent.Style, textComponent.Placeholder, textComponent.IsRequired ? textComponent.MinLength : null,
+                            textComponent.MaxLength, textComponent.IsRequired, textComponent.InitialValue);
+                        break;
+                    default:
+                        throw new InvalidOperationException($"{input.GetType().FullName} isn't a valid component info class");
+                }
+
+            await interaction.RespondWithModalAsync(builder.Build(), options).ConfigureAwait(false);
+        }
+    }
+}