h5p-php-library/js/h5p-data-view.js

257 lines
6.3 KiB
JavaScript

var H5PDataView = (function ($) {
/**
* Initialize a new H5P data view.
*
* @class
* @param {Object} container
* Element to clear out and append to.
* @param {String} source
* URL to get data from. Data format: {num: 123, rows:[[1,2,3],[2,4,6]]}
* @param {Array} headers
* List with column headers. Can be strings or objects with options like
* "text" and "sortable". E.g.
* [{text: 'Col 1', sortable: true}, 'Col 2', 'Col 3']
* @param {Object} l10n
* Localization / translations. e.g.
* {
* loading: 'Loading data.',
* ajaxFailed: 'Failed to load data.',
* noData: "There's no data available that matches your criteria.",
* currentPage: 'Page $current of $total',
* nextPage: 'Next page',
* previousPage: 'Previous page',
* search: 'Search'
* }
* @param {Object} classes
* Custom html classes to use on elements.
* e.g. {tableClass: 'fixed'}.
* @param {Array} filters
* Make it possible to filter/search in the given column.
* e.g. [null, true, null, null] will make it possible to do a text
* search in column 2.
* @param {Function} loaded
* Callback for when data has been loaded.
* @param {Object} order
*/
function H5PDataView(container, source, headers, l10n, classes, filters, loaded, order) {
var self = this;
self.$container = $(container).addClass('h5p-data-view').html('');
self.source = source;
self.headers = headers;
self.l10n = l10n;
self.classes = (classes === undefined ? {} : classes);
self.filters = (filters === undefined ? [] : filters);
self.loaded = loaded;
self.order = order;
self.limit = 20;
self.offset = 0;
self.filterOn = [];
self.loadData();
}
/**
* Load data from source URL.
*
* @public
*/
H5PDataView.prototype.loadData = function () {
var self = this;
// Throbb
self.setMessage(H5PUtils.throbber(self.l10n.loading));
// Create URL
var url = self.source;
url += (url.indexOf('?') === -1 ? '?' : '&') + 'offset=' + self.offset + '&limit=' + self.limit;
// Add sorting
if (self.order !== undefined) {
url += '&sortBy=' + self.order.by + '&sortDir=' + self.order.dir;
}
// Add filters
var filtering;
for (var i = 0; i < self.filterOn.length; i++) {
if (self.filterOn[i] === undefined) {
continue;
}
filtering = true;
url += '&filters[' + i + ']=' + encodeURIComponent(self.filterOn[i]);
}
// Fire ajax request
$.ajax({
dataType: 'json',
cache: true,
url: url
}).fail(function () {
// Error handling
self.setMessage($('<p/>', {text: self.l10n.ajaxFailed}));
}).done(function (data) {
if (!data.rows.length) {
self.setMessage($('<p/>', {text: filtering ? self.l10n.noData : self.l10n.empty}));
}
else {
// Update table data
self.updateTable(data.rows);
// Update pagination widget
self.updatePagination(data.num);
}
if (self.loaded !== undefined) {
self.loaded();
}
});
};
/**
* Display the given message to the user.
*
* @public
* @param {jQuery} $message wrapper with message
*/
H5PDataView.prototype.setMessage = function ($message) {
var self = this;
if (self.table === undefined) {
self.$container.html('').append($message);
}
else {
self.table.setBody($message);
}
};
/**
* Update table data.
*
* @public
* @param {Array} rows
*/
H5PDataView.prototype.updateTable = function (rows) {
var self = this;
if (self.table === undefined) {
// Clear out container
self.$container.html('');
// Add filters
self.addFilters();
// Create new table
self.table = new H5PUtils.Table(self.classes, self.headers);
self.table.setHeaders(self.headers, function (order) {
// Sorting column or direction has changed.
self.order = order;
self.loadData();
}, self.order);
self.table.appendTo(self.$container);
}
// Add/update rows
self.table.setRows(rows);
};
/**
* Update pagination widget.
*
* @public
* @param {Number} num size of data collection
*/
H5PDataView.prototype.updatePagination = function (num) {
var self = this;
if (self.pagination === undefined) {
// Create new widget
var $pagerContainer = $('<div/>', {'class': 'h5p-pagination'});
self.pagination = new H5PUtils.Pagination(num, self.limit, function (offset) {
// Handle page changes in pagination widget
self.offset = offset;
self.loadData();
}, self.l10n);
self.pagination.appendTo($pagerContainer);
self.table.setFoot($pagerContainer);
}
else {
// Update existing widget
self.pagination.update(num, self.limit);
}
};
/**
* Add filters.
*
* @public
*/
H5PDataView.prototype.addFilters = function () {
var self = this;
for (var i = 0; i < self.filters.length; i++) {
if (self.filters[i] === true) {
// Add text input filter for col i
self.addTextFilter(i);
}
}
};
/**
* Add text filter for given col num.
* @public
* @param {Number} col
*/
H5PDataView.prototype.addTextFilter = function (col) {
var self = this;
/**
* Find input value and filter on it.
* @private
*/
var search = function () {
var filterOn = $input.val().replace(/^\s+|\s+$/g, '');
if (filterOn === '') {
filterOn = undefined;
}
if (filterOn !== self.filterOn[col]) {
self.filterOn[col] = filterOn;
self.loadData();
}
};
// Add text field for filtering
var typing;
var $input = $('<input/>', {
type: 'text',
placeholder: self.l10n.search,
on: {
'blur': function () {
clearTimeout(typing);
search();
},
'keyup': function (event) {
if (event.keyCode === 13) {
clearTimeout(typing);
search();
return false;
}
else {
clearTimeout(typing);
typing = setTimeout(function () {
search();
}, 500);
}
}
}
}).appendTo(self.$container);
};
return H5PDataView;
})(H5P.jQuery);