luci-lib-taskd/luasrc/view/tasks/docker.htm

<% 
local taskd = require "luci.model.tasks"
local status = taskd.status(self.task_id)

-- Check if a task is running
local task_running = status.running

-- Check for a task start failure
if self.task_start_failed then 
%>
    <div class="alert-message warning">
        <%:Another task running, try again later.%> 
        <a href="javascript:void(taskd.show_log('<%=self.task_id%>'))">
            <%:Click here to check running task%>
        </a>
    </div>
<% end %>

<%+cbi/map%>

<div id="confirmRemove" class="alert-message danger" style="display:none; text-align: center;">
    <strong style="text-transform: uppercase;">This will permanently delete your installation, are you sure?</strong>
    <br>
    <input class="btn cbi-button cbi-button-remove" type="button" value="YES" onclick="proceedRemoval()" style="margin-right: 10px;">
    <input class="btn cbi-button" type="button" value="NO" onclick="closeRemoveConfirmation()">
</div>
<div class="cbi-page-actions control-group">
<%
    if not task_running then
        local util  = require "luci.util"
        
        local container_status = util.trim(util.exec(self.script_path.." status"))
        local container_status_lower = string.lower(container_status)
        
        local container_install = not string.match(container_status_lower, " is not installed$")
        local container_running = string.match(container_status_lower, "^up%W")
        
        if container_install then
%>
            <input class="btn cbi-button cbi-button-apply" type="button" value="<%:Upgrade%>/<%:Apply%>" onclick="cbi_submit(this, 'cbi.apply', 'upgrade')" />
<%
            if container_running then
%>
                <input class="btn cbi-button cbi-button-remove" type="button" value="<%:Stop%>" onclick="cbi_submit(this, 'cbi.apply', 'stop')" />
                <input class="btn cbi-button cbi-button-reload" type="button" value="<%:Restart%>" onclick="cbi_submit(this, 'cbi.apply', 'restart')" />
<% 
            else 
%>
                <input class="btn cbi-button cbi-button-apply" type="button" value="<%:Start%>" onclick="cbi_submit(this, 'cbi.apply', 'start')" />
                <input class="btn cbi-button cbi-button-remove" type="button" value="<%:Remove%>" onclick="showRemoveConfirmation()" />
<%
            end 
        else 
%>
            <input class="btn cbi-button cbi-button-apply" type="button" value="<%:Install%>" onclick="cbi_submit(this, 'cbi.apply', 'install')" />
<%
        end 
    else 
%>
        <input class="btn cbi-button cbi-button-apply" type="button" value="<%:Task Running%>&hellip;" onclick="taskd.show_log('<%=self.task_id%>')" />
<%
    end 
%>
</div>

<script>
    function showRemoveConfirmation() {
        document.getElementById("confirmRemove").style.display = "block";
    }

    function closeRemoveConfirmation() {
        document.getElementById("confirmRemove").style.display = "none";
    }

    function proceedRemoval() {
        closeRemoveConfirmation();
        cbi_submit(document.querySelector('.cbi-button-remove'), 'cbi.apply', 'rm');
    }
</script>

<%+tasks/embed%>

<% 
if self.auto_show_task and task_running then 
%>
    <script>
        taskd.show_log("<%=self.task_id%>");
    </script>
<% 
end 
%>