// widget_jsontable.ysl2

template "widget[@type='JsonTable']", mode="widget_class"
    ||
    class JsonTableWidget extends Widget{
        do_http_request() {
            const query = {
                 offset: '42',
                 filter: '*powerloss*',
                 args: this.args
            };

            const options = {
                 method: 'POST',
                 body: JSON.stringify(query),
                 headers: {'Content-Type': 'application/json'}
            }

            fetch(this.args[0], options)
                .then(res => res.json())
                .then(this.spread_json_data);

        }
        dispatch(value) {
            this.do_http_request();
        }
        on_click(evt) {
            this.do_http_request();
        }
        init() {
            this.element.setAttribute("onclick", "hmi_widgets['"+this.element_id+"'].on_click(evt)");
        }
    }
    ||

template "svg:*", mode="json_table_elt_render" {
    error > JsonTable Widget can't contain element of type «local-name()».
}

template "svg:use", mode="json_table_elt_render" {
    param "value_expr";
    // cloned element must be part of a HMI:List
    const "targetid", "substring-after(@xlink:href,'#')";
    const "from_list", "$hmi_lists[(@id | */@id) = $targetid]";

    if "count($from_list) = 0"
        error > Clones (svg:use) in JsonTable Widget must point to a valid HMI:List widget or HMI:List item. Reference "«@xlink:href»" is not valid.

    |         id("«@id»").setAttribute("xlink:href", 
    // obtain new target id from HMI:List widget
    |             "#"+hmi_widgets["«$from_list/@id»"].items[«$value_expr»]);
}

template "svg:text", mode="json_table_elt_render" {
    param "value_expr";
    |         id("«@id»").textContent = String(«$value_expr»);
}

template "svg:*", mode="json_table_render" {
    param "objname";
    apply ".", mode="json_table_elt_render" with "value_expr" > «$objname»«@inkscape:label»
}

template "svg:g", mode="json_table_render" {
    param "objname";
    |         let obj_«@id» = «$objname»«@inkscape:label»;
    apply "*[@inkscape:label]", mode="json_table_render" 
        with "objname" > obj_«@id»
}

template "widget[@type='JsonTable']", mode="widget_defs" {
    param "hmi_element";
    labels("data");
    optional_labels("forward backward cursor");
    const "data_elt", "$result_svg_ns//*[@id = $hmi_element/@id]/*[@inkscape:label = 'data']";
    |     spread_json_data: function(jdata) {
    apply "$data_elt/*", mode="json_table_render" with "objname","'jdata'";
    |     }
}