analytics/lib/plausible_web/templates/billing/change_plan.html.eex

<script type="text/javascript"  src="https://cdnjs.cloudflare.com/ajax/libs/fetch-jsonp/1.1.3/fetch-jsonp.min.js"></script>
<script>
  plans = function() {
    return {
      rawPlans: <%= raw Jason.encode!(Plausible.Billing.Plans.plans_for(@conn.assigns[:current_user])) %>,
      localizedPlans: null,
      volume: '10k',
      billingCycle: 'monthly',
      selectedPlanPrice() {
        return this.priceFor(this.selectedPlanProductId())
      },
      selectedPlanProductId() {
        var selectedPlan = this.rawPlans.find((plan) => plan.volume === this.volume)
        if (this.billingCycle === 'monthly'){
          return selectedPlan.monthly_product_id
        } else {
          return selectedPlan.yearly_product_id
        }
      },
      priceFor(productId) {
        var plan = this.localizedPlans.find(plan => plan.product_id === Number(productId))
        var currency = {
          'USD': '$',
          'EUR': '€',
          'GBP': '£'
        }[plan.currency]

        return currency + plan.price.net
      },
      fetchPlans() {
        var productIds = []

        this.rawPlans.forEach((plan) => {
          productIds.push(plan.monthly_product_id)
          productIds.push(plan.yearly_product_id)
        })

        fetchJsonp('https://checkout.paddle.com/api/2.0/prices?product_ids=' + productIds.join(','))
          .then((res) => res.json())
          .then((data) => {
            this.localizedPlans = data.response.products
          })
      }
    }
  }
</script>

<div class="mx-auto mt-6 text-center">
  <h1 class="text-3xl font-black dark:text-gray-100">Change subscription plan</h1>
</div>

<div class="w-full max-w-lg px-4 mx-auto mt-4">
  <div x-init="fetchPlans" x-data="plans()" class="flex-1 px-8 py-4 mt-8 mb-4 bg-white rounded shadow-md dark:bg-gray-800">
    <div class="w-full pt-2 text-xl font-bold dark:text-gray-100">
      Select your new plan
    </div>

    <div class="w-full text-sm text-gray-500 dark:text-gray-200">
      Depending on which plan you choose, your card might be charged immediately and your
      next payment date could change. You can preview these changes before committing.
    </div>

    <div class="pt-8"></div>

    <span class="relative z-0 inline-flex w-full shadow-sm">
      <button type="button" @click="billingCycle = 'monthly'" :class="{'bg-indigo-600 text-white border-indigo-600': billingCycle === 'monthly', 'bg-white dark:bg-gray-800 text-gray-700 dark:text-gray-300 hover:text-gray-500 dark:hover:text-gray-200 border-gray-300 dark:border-gray-500': billingCycle === 'yearly'}" class="relative w-full px-4 py-2 text-sm font-medium text-center border rounded-l-md leading-5 focus:outline-none focus:border-blue-300 focus:ring transition ease-in-out duration-150">
        Monthly billing
      </button>
      <button type="button" @click="billingCycle = 'yearly'" :class="{'bg-indigo-600 text-white border-indigo-600': billingCycle === 'yearly', 'bg-white dark:bg-gray-800 text-gray-700 dark:text-gray-300 hover:text-gray-500 dark:hover:text-gray-200 border-gray-300 dark:border-gray-500': billingCycle === 'monthly'}" class="relative w-full px-4 py-2 -ml-px text-sm font-medium text-center border rounded-r-md leading-5 focus:outline-none focus:border-blue-300 focus:ring transition ease-in-out duration-150">
        Yearly billing
      </button>
    </span>

    <div class="pt-6"></div>

    <template x-if="localizedPlans" class="flex flex-col">
      <div class="py-2 -my-2 overflow-x-auto sm:-mx-6 sm:px-6 lg:-mx-8 lg:px-8">
        <div class="inline-block min-w-full overflow-hidden align-middle border-b border-gray-200 shadow sm:rounded-lg dark:border-t dark:border-l dark:border-r dark:shadow-none">
          <table class="min-w-full">
            <thead>
              <tr>
                <th class="px-6 py-3 text-xs font-medium tracking-wider text-left text-gray-500 uppercase bg-gray-100 border-b border-gray-200 dark:bg-gray-900 leading-4 dark:text-gray-200">
                  Monthly pageviews
                </th>
                <th class="px-6 py-3 text-xs font-medium tracking-wider text-left text-gray-500 uppercase bg-gray-100 border-b border-gray-200 dark:bg-gray-900 leading-4 dark:text-gray-200">
                  Price
                </th>
              </tr>
            </thead>
            <tbody class="bg-white dark:bg-gray-800">
              <%= for plan <- Plausible.Billing.Plans.plans_for(@conn.assigns[:current_user]) do %>
                <%= render("_plan_option.html", plan: plan) %>
              <% end %>
            </tbody>
          </table>
        </div>
      </div>
    </template>

    <div x-show="!localizedPlans" class="mx-auto my-56 loading sm"><div></div></div>

    <div class="mt-6 text-right">
      <span class="inline-flex rounded-md shadow-sm">
        <a x-show="selectedPlanProductId() !== '<%= @subscription.paddle_plan_id %>'" style="display: none;" :href="'/billing/change-plan/preview/' + selectedPlanProductId()" class="inline-flex items-center px-4 py-2 text-sm font-medium text-white bg-indigo-600 border border-transparent leading-5 rounded-md hover:bg-indigo-500 focus:outline-none focus:border-indigo-700 focus:ring active:bg-indigo-700 transition ease-in-out duration-150">
          <svg fill="currentColor" viewBox="0 0 20 20" class="inline w-4 h-4 mr-2"><path d="M10 12a2 2 0 100-4 2 2 0 000 4z"></path><path fill-rule="evenodd" d="M.458 10C1.732 5.943 5.522 3 10 3s8.268 2.943 9.542 7c-1.274 4.057-5.064 7-9.542 7S1.732 14.057.458 10zM14 10a4 4 0 11-8 0 4 4 0 018 0z" clip-rule="evenodd"></path></svg>
          Preview changes
        </a>

        <a x-show="selectedPlanProductId() === '<%= @subscription.paddle_plan_id %>'" style="display: none;" tooltip="Select a different plan to continue" class="inline-flex items-center px-4 py-2 text-sm font-medium text-white bg-gray-400 border border-transparent leading-5 rounded-md">
          <svg fill="currentColor" viewBox="0 0 20 20" class="inline w-4 h-4 mr-2"><path d="M10 12a2 2 0 100-4 2 2 0 000 4z"></path><path fill-rule="evenodd" d="M.458 10C1.732 5.943 5.522 3 10 3s8.268 2.943 9.542 7c-1.274 4.057-5.064 7-9.542 7S1.732 14.057.458 10zM14 10a4 4 0 11-8 0 4 4 0 018 0z" clip-rule="evenodd"></path></svg>
          Preview changes
        </a>
      </span>
    </div>
  </div>
</div>

<div class="mt-8 text-center dark:text-gray-100">
  Questions? Contact <%= link("support@plausible.io", to: "mailto:support@plausible.io", class: "text-indigo-500") %>
</div>

<%= render("_paddle_script.html") %>