/*global SelectBox, gettext, ngettext, interpolate, quickElement, SelectFilter*/

/*

SelectFilter2 - Turns a multiple-select box into a filter interface.

Requires core.js and SelectBox.js.

*/

'use strict';

{

window.SelectFilter = {

init: function(field_id, field_name, is_stacked) {

if (field_id.match(/__prefix__/)) {

// Don't initialize on empty forms.

return;

}

const from_box = document.getElementById(field_id);

from_box.id += '_from'; // change its ID

from_box.className = 'filtered';

from_box.setAttribute('aria-labelledby', field_id + '_from_title');

for (const p of from_box.parentNode.getElementsByTagName('p')) {

if (p.classList.contains("info")) {

// Remove <p class="info">, because it just gets in the way.

from_box.parentNode.removeChild(p);

} else if (p.classList.contains("help")) {

// Move help text up to the top so it isn't below the select

// boxes or wrapped off on the side to the right of the add

// button:

from_box.parentNode.insertBefore(p, from_box.parentNode.firstChild);

}

}

// <div class="selector"> or <div class="selector stacked">

const selector_div = quickElement('div', from_box.parentNode);

// Make sure the selector div is at the beginning so that the

// add link would be displayed to the right of the widget.

from_box.parentNode.prepend(selector_div);

selector_div.className = is_stacked ? 'selector stacked' : 'selector';

// <div class="selector-available">

const selector_available = quickElement('div', selector_div);

selector_available.className = 'selector-available';

const selector_available_title = quickElement('div', selector_available);

selector_available_title.id = field_id + '_from_title';

selector_available_title.className = 'selector-available-title';

quickElement('label', selector_available_title, interpolate(gettext('Available %s') + ' ', [field_name]), 'for', field_id + '_from');

quickElement(

'p',

selector_available_title,

interpolate(gettext('Choose %s by selecting them and then select the "Choose" arrow button.'), [field_name]),

'class', 'helptext'

);

const filter_p = quickElement('p', selector_available, '', 'id', field_id + '_filter');

filter_p.className = 'selector-filter';

const search_filter_label = quickElement('label', filter_p, '', 'for', field_id + '_input');

quickElement(

'span', search_filter_label, '',

'class', 'help-tooltip search-label-icon',

'aria-label', interpolate(gettext("Type into this box to filter down the list of available %s."), [field_name])

);

filter_p.appendChild(document.createTextNode(' '));

const filter_input = quickElement('input', filter_p, '', 'type', 'text', 'placeholder', gettext("Filter"));

filter_input.id = field_id + '_input';

selector_available.appendChild(from_box);

const choose_all = quickElement(

'button',

selector_available,

interpolate(gettext('Choose all %s'), [field_name]),

'id', field_id + '_add_all',

'class', 'selector-chooseall'

);

// <ul class="selector-chooser">

const selector_chooser = quickElement('ul', selector_div);

selector_chooser.className = 'selector-chooser';

const add_button = quickElement(

'button',

quickElement('li', selector_chooser),

interpolate(gettext('Choose selected %s'), [field_name]),

'id', field_id + '_add',

'class', 'selector-add'

);

const remove_button = quickElement(

'button',

quickElement('li', selector_chooser),

interpolate(gettext('Remove selected %s'), [field_name]),

'id', field_id + '_remove',

'class', 'selector-remove'

);

// <div class="selector-chosen">

const selector_chosen = quickElement('div', selector_div, '', 'id', field_id + '_selector_chosen');

selector_chosen.className = 'selector-chosen';

const selector_chosen_title = quickElement('div', selector_chosen);

selector_chosen_title.className = 'selector-chosen-title';

selector_chosen_title.id = field_id + '_to_title';

quickElement('label', selector_chosen_title, interpolate(gettext('Chosen %s') + ' ', [field_name]), 'for', field_id + '_to');

quickElement(

'p',

selector_chosen_title,

interpolate(gettext('Remove %s by selecting them and then select the "Remove" arrow button.'), [field_name]),

'class', 'helptext'

);

const filter_selected_p = quickElement('p', selector_chosen, '', 'id', field_id + '_filter_selected');

filter_selected_p.className = 'selector-filter';

const search_filter_selected_label = quickElement('label', filter_selected_p, '', 'for', field_id + '_selected_input');

quickElement(

'span', search_filter_selected_label, '',

'class', 'help-tooltip search-label-icon',

'aria-label', interpolate(gettext("Type into this box to filter down the list of selected %s."), [field_name])

);

filter_selected_p.appendChild(document.createTextNode(' '));

const filter_selected_input = quickElement('input', filter_selected_p, '', 'type', 'text', 'placeholder', gettext("Filter"));

filter_selected_input.id = field_id + '_selected_input';

quickElement(

'select',

selector_chosen,

'',

'id', field_id + '_to',

'multiple', '',

'size', from_box.size,

'name', from_box.name,

'aria-labelledby', field_id + '_to_title',

'class', 'filtered'

);

const warning_footer = quickElement('div', selector_chosen, '', 'class', 'list-footer-display');

quickElement('span', warning_footer, '', 'id', field_id + '_list-footer-display-text');

quickElement('span', warning_footer, ' ' + gettext('(click to clear)'), 'class', 'list-footer-display__clear');

const clear_all = quickElement(

'button',

selector_chosen,

interpolate(gettext('Remove all %s'), [field_name]),

'id', field_id + '_remove_all',

'class', 'selector-clearall'

);

from_box.name = from_box.name + '_old';

// Set up the JavaScript event handlers for the select box filter interface

const move_selection = function(e, elem, move_func, from, to) {

if (!elem.hasAttribute('disabled')) {

move_func(from, to);

SelectFilter.refresh_icons(field_id);

SelectFilter.refresh_filtered_selects(field_id);

SelectFilter.refresh_filtered_warning(field_id);

}

e.preventDefault();

};

choose_all.addEventListener('click', function(e) {

move_selection(e, this, SelectBox.move_all, field_id + '_from', field_id + '_to');

});

add_button.addEventListener('click', function(e) {

move_selection(e, this, SelectBox.move, field_id + '_from', field_id + '_to');

});

remove_button.addEventListener('click', function(e) {

move_selection(e, this, SelectBox.move, field_id + '_to', field_id + '_from');

});

clear_all.addEventListener('click', function(e) {

move_selection(e, this, SelectBox.move_all, field_id + '_to', field_id + '_from');

});

warning_footer.addEventListener('click', function(e) {

filter_selected_input.value = '';

SelectBox.filter(field_id + '_to', '');

SelectFilter.refresh_filtered_warning(field_id);

SelectFilter.refresh_icons(field_id);

});

filter_input.addEventListener('keypress', function(e) {

SelectFilter.filter_key_press(e, field_id, '_from', '_to');

});

filter_input.addEventListener('keyup', function(e) {

SelectFilter.filter_key_up(e, field_id, '_from');

});

filter_input.addEventListener('keydown', function(e) {

SelectFilter.filter_key_down(e, field_id, '_from', '_to');

});

filter_selected_input.addEventListener('keypress', function(e) {

SelectFilter.filter_key_press(e, field_id, '_to', '_from');

});

filter_selected_input.addEventListener('keyup', function(e) {

SelectFilter.filter_key_up(e, field_id, '_to', '_selected_input');

});

filter_selected_input.addEventListener('keydown', function(e) {

SelectFilter.filter_key_down(e, field_id, '_to', '_from');

});

selector_div.addEventListener('change', function(e) {

if (e.target.tagName === 'SELECT') {

SelectFilter.refresh_icons(field_id);

}

});

selector_div.addEventListener('dblclick', function(e) {

if (e.target.tagName === 'OPTION') {

if (e.target.closest('select').id === field_id + '_to') {

SelectBox.move(field_id + '_to', field_id + '_from');

} else {

SelectBox.move(field_id + '_from', field_id + '_to');

}

SelectFilter.refresh_icons(field_id);

}

});

from_box.closest('form').addEventListener('submit', function() {

SelectBox.filter(field_id + '_to', '');

SelectBox.select_all(field_id + '_to');

});

SelectBox.init(field_id + '_from');

SelectBox.init(field_id + '_to');

// Move selected from_box options to to_box

SelectBox.move(field_id + '_from', field_id + '_to');

// Initial icon refresh

SelectFilter.refresh_icons(field_id);

},

any_selected: function(field) {

// Temporarily add the required attribute and check validity.

field.required = true;

const any_selected = field.checkValidity();

field.required = false;

return any_selected;

},

refresh_filtered_warning: function(field_id) {

const count = SelectBox.get_hidden_node_count(field_id + '_to');

const selector = document.getElementById(field_id + '_selector_chosen');

const warning = document.getElementById(field_id + '_list-footer-display-text');

selector.className = selector.className.replace('selector-chosen--with-filtered', '');

warning.textContent = interpolate(ngettext(

'%s selected option not visible',

'%s selected options not visible',

count

), [count]);

if(count > 0) {

selector.className += ' selector-chosen--with-filtered';

}

},

refresh_filtered_selects: function(field_id) {

SelectBox.filter(field_id + '_from', document.getElementById(field_id + "_input").value);

SelectBox.filter(field_id + '_to', document.getElementById(field_id + "_selected_input").value);

},

refresh_icons: function(field_id) {

const from = document.getElementById(field_id + '_from');

const to = document.getElementById(field_id + '_to');

// Disabled if no items are selected.

document.getElementById(field_id + '_add').disabled = !SelectFilter.any_selected(from);

document.getElementById(field_id + '_remove').disabled = !SelectFilter.any_selected(to);

// Disabled if the corresponding box is empty.

document.getElementById(field_id + '_add_all').disabled = !from.querySelector('option');

document.getElementById(field_id + '_remove_all').disabled = !to.querySelector('option');

},

filter_key_press: function(event, field_id, source, target) {

const source_box = document.getElementById(field_id + source);

// don't submit form if user pressed Enter

if ((event.which && event.which === 13) || (event.keyCode && event.keyCode === 13)) {

source_box.selectedIndex = 0;

SelectBox.move(field_id + source, field_id + target);

source_box.selectedIndex = 0;

event.preventDefault();

}

},

filter_key_up: function(event, field_id, source, filter_input) {

const input = filter_input || '_input';

const source_box = document.getElementById(field_id + source);

const temp = source_box.selectedIndex;

SelectBox.filter(field_id + source, document.getElementById(field_id + input).value);

source_box.selectedIndex = temp;

SelectFilter.refresh_filtered_warning(field_id);

SelectFilter.refresh_icons(field_id);

},

filter_key_down: function(event, field_id, source, target) {

const source_box = document.getElementById(field_id + source);

// right key (39) or left key (37)

const direction = source === '_from' ? 39 : 37;

// right arrow -- move across

if ((event.which && event.which === direction) || (event.keyCode && event.keyCode === direction)) {

const old_index = source_box.selectedIndex;

SelectBox.move(field_id + source, field_id + target);

SelectFilter.refresh_filtered_selects(field_id);

SelectFilter.refresh_filtered_warning(field_id);

source_box.selectedIndex = (old_index === source_box.length) ? source_box.length - 1 : old_index;

return;

}

// down arrow -- wrap around

if ((event.which && event.which === 40) || (event.keyCode && event.keyCode === 40)) {

source_box.selectedIndex = (source_box.length === source_box.selectedIndex + 1) ? 0 : source_box.selectedIndex + 1;

}

// up arrow -- wrap around

if ((event.which && event.which === 38) || (event.keyCode && event.keyCode === 38)) {

source_box.selectedIndex = (source_box.selectedIndex === 0) ? source_box.length - 1 : source_box.selectedIndex - 1;

}

}

};

window.addEventListener('load', function(e) {

document.querySelectorAll('select.selectfilter, select.selectfilterstacked').forEach(function(el) {

const data = el.dataset;

SelectFilter.init(el.id, data.fieldName, parseInt(data.isStacked, 10));

});

});

}