btcpayserver/BTCPayServer/Views/UIForms/Modify.cshtml

@using BTCPayServer.Forms
@using Microsoft.AspNetCore.Mvc.TagHelpers
@using BTCPayServer.Abstractions.TagHelpers
@using Newtonsoft.Json
@model BTCPayServer.Forms.ModifyForm

@{
    var formId = Context.GetRouteValue("id");
    var isNew = formId is null;
    Layout = "../Shared/_NavLayout.cshtml";
    ViewData["NavPartialName"] = "../UIStores/_Nav";
    ViewData.SetActivePage(StoreNavPages.Forms, $"{(isNew ? "Create" : "Edit")} Form", Model.Name);

    var storeId = Context.GetCurrentStoreId();
}

@section PageFootContent {
    <partial name="_ValidationScriptsPartial"/>
    <script>
        document.addEventListener("DOMContentLoaded", () => {
            const $config = document.getElementById("FormConfig");
            delegate("click", "[data-form-template]", e => {
                const { formTemplate: id } = e.target.dataset
                const $template = document.getElementById(`form-template-${id}`)
                $config.value = $template.innerHTML.trim()
            })
        })
    </script>
}

<template id="form-template-email">
	@FormDataService.StaticFormEmail
</template>
<template id="form-template-address">
	@FormDataService.StaticFormAddress
</template>

<form method="post" asp-action="Modify" asp-route-id="@formId" asp-route-storeId="@storeId">
    <div class="row">
        <div class="col-xl-10 col-xxl-constrain">
            <div class="d-flex align-items-center justify-content-between mb-3">
                <h3 class="mb-0">
                    <span>@ViewData["Title"]</span>
                    <a href="https://docs.btcpayserver.org/Forms" target="_blank" rel="noreferrer noopener" title="More information...">
                        <vc:icon symbol="info" />
                    </a>
                </h3>
                <div class="d-flex gap-3 mt-3 mt-sm-0">
                    <button type="submit" class="btn btn-primary order-sm-1" id="SaveButton">Save</button>
                    @if (!isNew)
                    {
                        <a class="btn btn-secondary" asp-action="ViewPublicForm" asp-route-formId="@formId" id="ViewForm">View</a>
                    }
                </div>
            </div>
            <div asp-validation-summary="All" class="text-danger"></div>
            <div class="form-group">
                <label asp-for="Name" class="form-label" data-required></label>
                <input asp-for="Name" class="form-control" required/>
                <span asp-validation-for="Name" class="text-danger"></span>
            </div>
            <div class="d-flex align-items-center mb-4 gap-3">
                <input asp-for="Public" type="checkbox" class="btcpay-toggle" />
                <div>
                    <label asp-for="Public"></label>
                    <div class="form-text" style="max-width:27rem">
                        Standalone mode, which can be used to generate invoices
                        independent of payment requests or apps.
                    </div>
                </div>
            </div>
            <div class="form-group">
                <div class="d-flex align-items-center justify-content-between gap-3">
                    <label asp-for="FormConfig" class="form-label" data-required></label>
                    <div class="d-flex align-items-center gap-2 mb-2">
                        <span>Templates:</span>
                        <button type="button" class="btn btn-link p-0" data-form-template="email">Email</button>
                        <button type="button" class="btn btn-link p-0" data-form-template="address">Address</button>
                    </div>
                </div>
                <textarea asp-for="FormConfig" class="form-control" rows="10" cols="21"></textarea>
                <span asp-validation-for="FormConfig" class="text-danger"></span>
            </div>
        </div>
    </div>
</form>