redmine_qbo_calendar/app/views/common/_calendar.html.erb

<%
  # Get Redmine's configured non-working week days (e.g., ["6", "7"] for Sat/Sun)
  non_working_days = Setting.non_working_week_days || []

  # Safely collect all unique CustomerAppointments across the entire calendar date range
  all_appointments = (calendar.startdt..calendar.enddt).flat_map { |date|
    calendar.events_on(date)
  }.select { |e| e.is_a?(CustomerAppointment) }.uniq

  # Lambda to determine if an appointment should render on a specific calendar day
  appointment_occurs_on = lambda do |appointment, current_day|
    return false if appointment.start_date.nil?

    start_date = appointment.start_date.to_date
    target_date = current_day.to_date

    return false if target_date < start_date
    # Skip rendering on Redmine non-working days
    return false if non_working_days.include?(target_date.cwday.to_s)

    duration = [appointment.duration.to_i, 1].max
    date_cursor = start_date
    working_days_count = 0

    while date_cursor <= target_date
      unless non_working_days.include?(date_cursor.cwday.to_s)
        working_days_count += 1
      end

      if date_cursor == target_date
        return working_days_count <= duration
      end

      date_cursor += 1 # Pure Ruby Date increment stays a Date object
    end

    false
  end
%>

<%= form_tag({}, data: { cm_url: issues_context_menu_path }) do %>
  <%= hidden_field_tag 'back_url', url_for(params: request.query_parameters), id: nil %>

  <ul class="cal">
    <li scope="col" title="<%= l(:label_week) %>" class="calhead week-number"></li>

    <% 7.times do |i| %>
      <li scope="col" class="calhead">
        <%= day_name((calendar.first_wday + i) % 7) %>
      </li>
    <% end %>

    <% calendar.format_month.each_slice(7) do |week| %>

      <li class="week-number">
        <span class="label-week"><%= l(:label_week) %></span>
        <%= calendar.week_number(week.first) %>
      </li>

      <% week.each do |day| %>

        <li class="<%= calendar.day_css_classes(day) %> calbody">

          <p class="day-num">
            <span class="day-value"><%= day.day %></span>
            <span class="abbr-day">(<%= abbr_day_name(day.cwday) %>)</span>
            
            <%= link_to sprite_icon('add'),
                        new_customer_appointment_path(start_date: day),
                        class: 'icon-only icon-add',
                        title: l(:label_appointment_new, default: 'New Appointment') %>
          </p>

          <% 
            # Non-appointment events (Issues, Versions, etc.)
            standard_events = calendar.events_on(day).reject { |e| e.is_a?(CustomerAppointment) }

            # Appointments matching duration on this working day
            matching_appointments = all_appointments.select { |app| appointment_occurs_on.call(app, day) }
          %>

          <% (standard_events + matching_appointments).each do |event| %>

            <% if event.is_a?(Issue) %>

              <% starting = (day == event.start_date) %>
              <% ending   = (day == event.due_date) %>

              <%= tag.div class: [
                    event.css_classes,
                    'tooltip',
                    'hascontextmenu',
                    ('starting' if starting),
                    ('ending' if ending)
                  ].compact do %>

                <%= "#{event.project} -" unless @project && @project == event.project %>

                <%= sprite_icon('bullet-go', rtl: true) if starting && !ending %>
                <%= sprite_icon('bullet-end', rtl: true) if ending && !starting %>
                <%= sprite_icon('bullet-go-end') if starting && ending %>

                <%= link_to_issue(event, truncate: 30) %>

                <span class="tip">
                  <%= render_issue_tooltip(event) %>
                </span>

                <%= check_box_tag 'ids[]',
                                  event.id,
                                  false,
                                  style: 'display:none;',
                                  id: nil %>

              <% end %>

            <% elsif event.is_a?(Version) %>

              <span class="icon icon-package">

                <%= sprite_icon 'package' %>

                <%= "#{event.project} -" unless @project && @project == event.project %>

                <%= link_to_version(event) %>

              </span>

            <% elsif event.is_a?(CustomerAppointment) %>

              <%= render partial: 'customer_appointments/calendar_event',
                         locals: {
                           appointment: event,
                           day: day,
                           project: @project
                         } %>

            <% else %>

              <% Rails.logger.warn("Unknown calendar event: #{event.class}") %>

            <% end %>

          <% end %>

        </li>

      <% end %>

    <% end %>

  </ul>

<% end %>

<%= context_menu %>