{
    "type": "overpass",
    "name": {
        "de": "Gebäudealter",
        "en": "Building age",
        "fr": "Date de construction",
        "pt-br": "Idade"
    },
    "query": {
        "16": [
            "(",
            "  way[building];",
            "  relation[building];",
            ")"
        ]
    },
    "feature": {
        "pre": [
            "{% set type = tags.building|split(';')[0] %}",
            "{% if tags.military %}{% set type = 'military' %}{% endif %}",
            "",
            "{% set start_date = tags.start_date %}",
            "{% if attribute(tags, 'building:start_date') %}{% set start_date = attribute(tags, 'building:start_date') %}{% endif %}",
            "{# Deprecated tags #}",
            "{% if not start_date and attribute(tags, 'building:age') %}{% set start_date = attribute(tags, 'building:age') %}{% endif %}",
            "{% if not start_date and attribute(tags, 'building:year_built') %}{% set start_date = attribute(tags, 'building:year_built') %}{% endif %}",
            "{% if not start_date and attribute(tags, 'building:buildyear') %}{% set start_date = attribute(tags, 'building:buildyear') %}{% endif %}",
            "{% if not start_date and attribute(tags, 'year_built') %}{% set start_date = attribute(tags, 'year_built') %}{% endif %}",
            "{% if not start_date and attribute(tags, 'building:year') %}{% set start_date = attribute(tags, 'building:year') %}{% endif %}",
            "{% if not start_date and attribute(tags, 'year_of_construction') %}{% set start_date = attribute(tags, 'year_of_construction') %}{% endif %}",
            "",
            "{% if start_date %}",
            "  {# equalize tagging mistakes - need to add QA messages #}",
            "  {# convert 1910-1911 to 1910..1911 #}{% set m = start_date|matches('^(\\d{4})-(\\d{4})$') %}{% if m %}{% set start_date = m[1] ~ '..' ~ m[2] %}{% endif %}",
            "  {# convert 191* to 1910s #}{% set m = start_date|matches('^(\\d{3})\\*$') %}{% if m %}{% set start_date = m[1] ~ '0s' %}{% endif %}",
            "",
            "",
            "  {% set value = start_date|osmParseDate %}",
            "  {% if value and value[0] and value[1] %}",
            "    {% set value = (value[1] - value[0]) / 2 + value[0] %}",
            "  {% elseif value and value[0] %}",
            "    {% set value = value[0] %}",
            "  {% elseif value and value[1] %}",
            "    {% set value = value[1] %}",
            "  {% else %}",
            "    {% set value = 'error' %}",
            "  {% endif %}",
            "",
            "  {% if value == 'error' %}",
            "    {% set color = '#ff0000' %}",
            "  {% elseif value < 1500 %}",
            "    {% set color = '#0000ff' %}",
            "  {% elseif value < 1900 %}",
            "    {% set color = colorInterpolate([ '#0000ff', '#ff00ff' ], (value - 1500.0) / 400) %}",
            "  {% elseif value < 2000 %}",
            "    {% set color = colorInterpolate([ '#ff00ff', '#ffff00' ], (value - 1900.0) / 100) %}",
            "  {% else %}",
            "    {% set color = colorInterpolate([ '#ffff00', '#00ff00' ], (value - 2000.0) / 50) %}",
            "  {% endif %}",
            "{% else %}",
            "{% set color = '#7f7f7f' %}",
            "{% endif %}"
        ],
        "description": [
            "{% if tags.building == 'yes' and tags.military %}",
            "{{ tagTrans('building', 'military') }}",
            "{% elseif tags.building == 'yes' %}",
            "{{ keyTrans('building') }}",
            "{% else %}",
            "{{ tagTransList('building', tags.building) }}",
            "{% endif %}",
            "{% if tags.building == 'construction' and tags.construction %}",
            "({{ tagTransList('building', tags.construction) }})",
            "{% endif %}",
            "{% if tags.building in  [ 'yes', 'military' ] and tags.military %}",
            "({{ tagTransList('military', tags.military) }})",
            "{% endif %}"
        ],
        "details": [
            "{% if start_date %}",
            "{{ start_date|osmFormatDate({ format: 'short' }) }}",
            "{% else %}",
            "{{ trans('unknown') }}",
            "{% endif %}"
        ],
        "body": [
            "<ul>",
            "{% if attribute(tags, 'building:start_date') %}<li>",
            "<span class='key'>{{ keyTrans('building:start_date') }}:</span>",
            "<span class='value'>{{ attribute(tags, 'building:start_date')|osmFormatDate }}</span>",
            "</li>{% endif %}",
            "</ul>"
        ],
        "markerSymbol": null,
        "listMarkerSymbol": "{{ markerPolygon({ \"fillColor\": color, \"fillOpacity\": 0.8, \"width\": 1, \"color\": \"#000000\" })|raw }}",
        "priority": [
            "{% set p = 100 %}",
            "{% if start_date %}{% set p = p - 20 %}{% endif %}",
            "{% if tags.name %}{% set p = p - 10 %}{% endif %}",
            "{% if tags.amenity %}{% set p = p - 1 %}{% endif %}",
            "{% if tags.historic %}{% set p = p - 1 %}{% endif %}",
            "{% if tags.culture %}{% set p = p - 1 %}{% endif %}",
            "{% if tags.highway %}{% set p = p - 1 %}{% endif %}",
            "{% if tags.railway %}{% set p = p - 1 %}{% endif %}",
            "{% if tags.aeroway %}{% set p = p - 1 %}{% endif %}",
            "{% if tags.amenity %}{% set p = p - 1 %}{% endif %}",
            "{% if tags.tourism %}{% set p = p - 1 %}{% endif %}",
            "{{ p }}"
        ],
        "style": {
            "width": "1",
            "color": "#000000",
            "fillColor": "{{ color }}",
            "fillOpacity": "0.8"
        }
    },
    "info": [
        "<table>",
        "  <tr>",
        "    <td>{{ markerPolygon(evaluate({ \"building\": \"yes\", \"start_date\": \"1400\" }))|raw }}</td>",
        "    <td>&lt;1500</td>",
        "  </tr>",
        "  <tr>",
        "    <td>{{ markerPolygon(evaluate({ \"building\": \"yes\", \"start_date\": \"1500\" }))|raw }}</td>",
        "    <td>1500</td>",
        "  </tr>",
        "  <tr>",
        "    <td>{{ markerPolygon(evaluate({ \"building\": \"yes\", \"start_date\": \"1600\" }))|raw }}</td>",
        "    <td>1600</td>",
        "  </tr>",
        "  <tr>",
        "    <td>{{ markerPolygon(evaluate({ \"building\": \"yes\", \"start_date\": \"1700\" }))|raw }}</td>",
        "    <td>1700</td>",
        "  </tr>",
        "  <tr>",
        "    <td>{{ markerPolygon(evaluate({ \"building\": \"yes\", \"start_date\": \"1800\" }))|raw }}</td>",
        "    <td>1800</td>",
        "  </tr>",
        "  <tr>",
        "    <td>{{ markerPolygon(evaluate({ \"building\": \"yes\", \"start_date\": \"1900\" }))|raw }}</td>",
        "    <td>1900</td>",
        "  </tr>",
        "  <tr>",
        "    <td>{{ markerPolygon(evaluate({ \"building\": \"yes\", \"start_date\": \"1950\" }))|raw }}</td>",
        "    <td>1950</td>",
        "  </tr>",
        "  <tr>",
        "    <td>{{ markerPolygon(evaluate({ \"building\": \"yes\", \"start_date\": \"2000\" }))|raw }}</td>",
        "    <td>2000</td>",
        "  </tr>",
        "  <tr>",
        "    <td>{{ markerPolygon(evaluate({ \"building\": \"yes\", \"start_date\": \"2020\" }))|raw }}</td>",
        "    <td>2020</td>",
        "  </tr>",
        "  <tr>",
        "    <td>{{ markerPolygon(evaluate({ \"building\": \"yes\", \"start_date\": \"xxx\" }))|raw }}</td>",
        "    <td>{{ repoTrans('date format not understood') }}</td>",
        "  </tr>",
        "  <tr>",
        "    <td>{{ markerPolygon(evaluate({ \"building\": \"yes\" }))|raw }}</td>",
        "    <td>{{ trans('unknown') }}</td>",
        "  </tr>",
        "</table>"
    ]
}