sanger/sequencescape

<% unless batches.empty? %>
  <%= pagination batches if showing_all %>
  <%# We call to_a here as otherwise rails tries to 'optimise' the query with a nested scope. Not
    # only would this be less eficient, it is also invalid SQL.
    # We also need to build the cache manualy, at least until rails provides eager_count. You CAN do it with
    # custom selects and joins, but that gets a little messy.
  %>
  <% request_count_cache = BatchRequest.where(batch_id:batches.to_a).group(:batch_id).count %>
  <table class="table table-striped">
    <thead>
      <tr>
        <th>Batch</th>
        <th>Items</th>
        <th>Created by</th>
        <th>Assigned to</th>
        <th>Created at</th>
        <th>Status</th>
        <% if in_progress %>
          <th>Last completed task</th>
        <% end %>
        <th>&nbsp;</th>
      </tr>
    </thead>

    <tbody>
      <% batches.each_with_index do |batch, index| %>
      <tr class="batch">
        <td><%= link_to batch.id, batch_path(batch), {title: "#{batch.state} batch #{batch.id}"} %></td>
        <td><%= request_count_cache[batch.id]||0 %></td>
        <td><%= batch.user.blank? ? "Unknown" : batch.user.login %></td>
        <td><%= batch.assigned_user %></td>
        <td><%= batch.created_at.to_date.to_formatted_s(:rfc822) %></td>
        <td>
          <% if batch.failed? %>
            <%= batch.state.capitalize %>
            <% unless batch.failures.blank? %>
              (<%= batch.failures.first.reason  %>) <!-- TODO: Make sure a reason is being saved when failing a batch -->
            <% end %>
          <% else %>
            <%= batch.state.humanize %>
          <% end %>
        </td>

        <% if in_progress %>
          <% unless batch.last_completed_task.nil? %>
            <td><%= batch.last_completed_task.name %></td>
          <% else %>
            <% if batch.started? %>
              <td>Only just started</td>
            <% elsif batch.pending? %>
              <td>Pending</td>
            <% else %>
              <td></td>
            <% end %>
          <% end %>
        <% end %>
          <td>
            <% if batch.pipeline %>
              <% if batch.state == "completed" -%>
                <%= link_to "Release batch", release_batch_url(batch) %>
              <% else -%>
                <%= link_to("View batch", batch_path(batch), title: "View #{batch_state} batch #{index+1}") %>
              <% end -%>
            <% end %>
          </td>
        </tr>
      <% end %>
    </tbody>
  </table>
  <div class="card-body">
    <% if @pipeline %>
      <%= link_to "View all #{batches.first.state} batches", controller: :batches, action: batches.first.state, pipeline_id: @pipeline.id %>
    <% end %>
  </div>
<% else -%>
  <div class="card-body"><p>No batches have this status</p></div>
<% end -%>