'use strict';
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var escapeHTML = require('../Utils').escapeHTML;
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var cmdHelper = require('../helper/CmdHelper');
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var domQuery = require('min-dom').query,
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domAttr = require('min-dom').attr,
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domClosest = require('min-dom').closest;
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var filter = require('lodash/filter'),
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forEach = require('lodash/forEach'),
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keys = require('lodash/keys');
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var domify = require('min-dom').domify;
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var entryFieldDescription = require('./EntryFieldDescription');
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var updateSelection = require('selection-update');
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var TABLE_ROW_DIV_SNIPPET = '<div class="bpp-field-wrapper bpp-table-row">';
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var DELETE_ROW_BUTTON_SNIPPET = '<button class="clear" data-action="deleteElement">' +
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'<span>X</span>' +
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'</button>';
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function createInputRowTemplate(properties, canRemove) {
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var template = TABLE_ROW_DIV_SNIPPET;
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template += createInputTemplate(properties, canRemove);
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template += canRemove ? DELETE_ROW_BUTTON_SNIPPET : '';
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template += '</div>';
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return template;
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}
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function createInputTemplate(properties, canRemove) {
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var columns = properties.length;
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var template = '';
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forEach(properties, function(prop) {
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template += '<input class="bpp-table-row-columns-' + columns + ' ' +
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(canRemove ? 'bpp-table-row-removable' : '') + '" ' +
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'id="activiti-table-row-cell-input-value" ' +
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'type="text" ' +
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'name="' + escapeHTML(prop) + '" />';
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});
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return template;
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}
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function createLabelRowTemplate(labels) {
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var template = TABLE_ROW_DIV_SNIPPET;
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template += createLabelTemplate(labels);
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template += '</div>';
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return template;
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}
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function createLabelTemplate(labels) {
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var columns = labels.length;
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var template = '';
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forEach(labels, function(label) {
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template += '<label class="bpp-table-row-columns-' + columns + '">' + escapeHTML(label) + '</label>';
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});
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return template;
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}
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function pick(elements, properties) {
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return (elements || []).map(function(elem) {
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var newElement = {};
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forEach(properties, function(prop) {
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newElement[prop] = elem[prop] || '';
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});
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return newElement;
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});
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}
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function diff(element, node, values, oldValues, editable) {
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return filter(values, function(value, idx) {
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return !valueEqual(element, node, value, oldValues[idx], editable, idx);
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});
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}
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function valueEqual(element, node, value, oldValue, editable, idx) {
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if (value && !oldValue) {
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return false;
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}
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var allKeys = keys(value).concat(keys(oldValue));
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return allKeys.every(function(key) {
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var n = value[key] || undefined;
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var o = oldValue[key] || undefined;
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return !editable(element, node, key, idx) || n === o;
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});
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}
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function getEntryNode(node) {
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return domClosest(node, '[data-entry]', true);
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}
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function getContainer(node) {
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return domQuery('div[data-list-entry-container]', node);
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}
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function getSelection(node) {
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return {
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start: node.selectionStart,
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end: node.selectionEnd
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};
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}
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function setSelection(node, selection) {
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node.selectionStart = selection.start;
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node.selectionEnd = selection.end;
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}
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/**
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* @param {Object} options
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* @param {string} options.id
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* @param {string} options.description
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* @param {Array<string>} options.modelProperties
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* @param {Array<string>} options.labels
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* @param {Function} options.getElements - this callback function must return a list of business object items
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* @param {Function} options.removeElement
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* @param {Function} options.addElement
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* @param {Function} options.updateElement
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* @param {Function} options.editable
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* @param {Function} options.setControlValue
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* @param {Function} options.show
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*
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* @return {Object}
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*/
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module.exports = function(options) {
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var id = options.id,
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modelProperties = options.modelProperties,
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labels = options.labels,
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description = options.description;
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var labelRow = createLabelRowTemplate(labels);
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var getElements = options.getElements;
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var removeElement = options.removeElement,
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canRemove = typeof removeElement === 'function';
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var addElement = options.addElement,
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canAdd = typeof addElement === 'function',
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addLabel = options.addLabel || 'Add Value';
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var updateElement = options.updateElement,
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canUpdate = typeof updateElement === 'function';
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var editable = options.editable || function() { return true; },
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setControlValue = options.setControlValue;
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var show = options.show,
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canBeShown = typeof show === 'function';
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var elements = function(element, node) {
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return pick(getElements(element, node), modelProperties);
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};
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var factory = {
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id: id,
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html: (canAdd ?
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'<div class="bpp-table-add-row" ' + (canBeShown ? 'data-show="show"' : '') + '>' +
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'<label>' + escapeHTML(addLabel) + '</label>' +
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'<button class="add" data-action="addElement"><span>+</span></button>' +
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'</div>' : '') +
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'<div class="bpp-table" data-show="showTable">' +
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'<div class="bpp-field-wrapper bpp-table-row">' +
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labelRow +
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'</div>' +
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'<div data-list-entry-container>' +
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'</div>' +
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'</div>' +
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// add description below table entry field
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(description ? entryFieldDescription(description) : ''),
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get: function(element, node) {
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var boElements = elements(element, node, this.__invalidValues);
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var invalidValues = this.__invalidValues;
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delete this.__invalidValues;
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forEach(invalidValues, function(value, idx) {
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var element = boElements[idx];
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forEach(modelProperties, function(prop) {
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element[prop] = value[prop];
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});
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});
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return boElements;
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},
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set: function(element, values, node) {
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var action = this.__action || {};
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delete this.__action;
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if (action.id === 'delete-element') {
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return removeElement(element, node, action.idx);
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}
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else if (action.id === 'add-element') {
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return addElement(element, node);
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}
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else if (canUpdate) {
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var commands = [],
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valuesToValidate = values;
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if (typeof options.validate !== 'function') {
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valuesToValidate = diff(element, node, values, elements(element, node), editable);
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}
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var self = this;
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forEach(valuesToValidate, function(value) {
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var validationError,
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idx = values.indexOf(value);
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if (typeof options.validate === 'function') {
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validationError = options.validate(element, value, node, idx);
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}
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if (!validationError) {
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var cmd = updateElement(element, value, node, idx);
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if (cmd) {
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commands.push(cmd);
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}
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} else {
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// cache invalid value in an object by index as key
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self.__invalidValues = self.__invalidValues || {};
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self.__invalidValues[idx] = value;
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// execute a command, which does not do anything
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commands.push(cmdHelper.updateProperties(element, {}));
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}
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});
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return commands;
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}
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},
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createListEntryTemplate: function(value, index, selectBox) {
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return createInputRowTemplate(modelProperties, canRemove);
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},
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addElement: function(element, node, event, scopeNode) {
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var template = domify(createInputRowTemplate(modelProperties, canRemove));
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var container = getContainer(node);
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container.appendChild(template);
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this.__action = {
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id: 'add-element'
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};
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return true;
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},
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deleteElement: function(element, node, event, scopeNode) {
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var container = getContainer(node);
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var rowToDelete = event.delegateTarget.parentNode;
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var idx = parseInt(domAttr(rowToDelete, 'data-index'), 10);
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container.removeChild(rowToDelete);
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this.__action = {
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id: 'delete-element',
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idx: idx
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};
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return true;
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},
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editable: function(element, rowNode, input, prop, value, idx) {
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var entryNode = domClosest(rowNode, '[data-entry]');
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return editable(element, entryNode, prop, idx);
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},
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show: function(element, entryNode, node, scopeNode) {
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entryNode = getEntryNode(entryNode);
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return show(element, entryNode, node, scopeNode);
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},
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showTable: function(element, entryNode, node, scopeNode) {
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entryNode = getEntryNode(entryNode);
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var elems = elements(element, entryNode);
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return elems && elems.length && (!canBeShown || show(element, entryNode, node, scopeNode));
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},
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validateListItem: function(element, value, node, idx) {
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if (typeof options.validate === 'function') {
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return options.validate(element, value, node, idx);
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}
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}
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};
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// Update/set the selection on the correct position.
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// It's the same code like for an input value in the PropertiesPanel.js.
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if (setControlValue) {
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factory.setControlValue = function(element, rowNode, input, prop, value, idx) {
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var entryNode = getEntryNode(rowNode);
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var isReadOnly = domAttr(input, 'readonly');
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var oldValue = input.value;
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var selection;
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// prevents input fields from having the value 'undefined'
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if (value === undefined) {
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value = '';
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}
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// when the attribute 'readonly' exists, ignore the comparison
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// with 'oldValue' and 'value'
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if (!!isReadOnly && oldValue === value) {
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return;
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}
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// update selection on undo/redo
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if (document.activeElement === input) {
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selection = updateSelection(getSelection(input), oldValue, value);
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}
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setControlValue(element, entryNode, input, prop, value, idx);
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if (selection) {
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setSelection(input, selection);
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}
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};
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}
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return factory;
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};
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