computer-playbook/roles/srv-web-7-7-inj-compose/templates/global.includes.lua.j2

{% set modifier_css_enabled = applications | get_app_conf(application_id, 'features.css', false) | bool %}
{% if modifier_css_enabled %}
{%- include 'roles/srv-web-7-7-inj-css/templates/location.conf.j2' -%}
{% endif %}

lua_need_request_body on;

body_filter_by_lua_block {
    -- initialize buffer
    ngx.ctx.buf = ngx.ctx.buf or {}
    local chunk, eof = ngx.arg[1], ngx.arg[2]

    if chunk ~= "" then
        table.insert(ngx.ctx.buf, chunk)
    end

    if not eof then
        ngx.arg[1] = nil
        return
    end

    -- on eof: concatenate and reset buffer
    local whole = table.concat(ngx.ctx.buf)
    ngx.ctx.buf = nil

    -- build head-injection snippets
    local head_snippets = {}

    {% for head_feature in ['css', 'matomo', 'port-ui-desktop', 'javascript', 'logout'] %}
    {% if applications | get_app_conf(application_id, 'features.' ~ head_feature, false) | bool %}
    head_snippets[#head_snippets + 1] = [=[
        {%- include "roles/srv-web-7-7-inj-" ~ head_feature ~ "/templates/head_sub.j2" -%}
    ]=]
    {% endif %}
    {% endfor %}

    -- inject into </head>
    local head_payload = table.concat(head_snippets, "\n") .. "</head>"
    whole = string.gsub(whole, "</head>", head_payload)

    {% if applications | get_app_conf(application_id, 'features.matomo', false) | bool %}
    -- build Matomo noscript tracking for body
    local body_matomo = [=[
        {%- include 'roles/srv-web-7-7-inj-matomo/templates/body_sub.j2' -%}
    ]=]

    -- inject before </body>
    whole = string.gsub(whole, "</body>", body_matomo)
    {% endif %}

    ngx.arg[1] = whole
}