var table = {{ datatable.model_table_setup }};
var indexes = table.initsetup.tableOptions.indexes;
var heading_index = indexes.indexOf('heading');
var description_index = indexes.indexOf('description');
var background_colour_index = indexes.indexOf('background_colour');
var start_date_field_index = indexes.indexOf('start_date_field');
var end_date_field_index = indexes.indexOf('end_date_field');
var description = indexes.indexOf('description');
var link_index = -1;
if(table.initsetup.tableOptions.row_href) {
    link_details = table.initsetup.tableOptions.row_href[0];
    // The last: the link column is added after the rest, and the heading may be the same column.
    link_index = table.initsetup.field_ids.lastIndexOf(link_details.column);
}
$.each(table.data, function( index, card ) {
    try {
        var start_date = toISOFormat(card[start_date_field_index]);
        var end_date = toISOFormat(card[end_date_field_index]);

        // skip if either date is invalid
        if (!start_date || !end_date || isNaN(Date.parse(start_date)) || isNaN(Date.parse(end_date))) {
            return true; // continue
        }

        var link = '';
        if(link_index >= 0) {
            // A link column gives [key, text]: the key goes in the url, encoded so it can only be a key.
            var key = Array.isArray(card[link_index]) ? card[link_index][0] : card[link_index];
            link = link_details.html.replace(link_details.var, encodeURIComponent(key));
        }
        // A hex colour, '#' added where it is stored without one; anything else -- blank on many records --
        // leaves the entry the calendar's own colour.
        var colour_match = background_colour_index >= 0
            ? /^#?([0-9a-f]{3}|[0-9a-f]{6}|[0-9a-f]{8})$/i.exec(String(card[background_colour_index] || '').trim())
            : null;
        var colour = colour_match ? '#' + colour_match[1] : undefined;
        var event = {
            title: card[heading_index],
            start: start_date,
            end: end_date,
            backgroundColor: colour,
            borderColor: colour,
            description: card[description],
            url: link
        }
        events.push(event)

    } catch (e) {
        return true; // continue on error
    }
});