Your IP : 216.73.216.95
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This file is part of Moodle - http://moodle.org/\n//\n// Moodle is free software: you can redistribute it and/or modify\n// it under the terms of the GNU General Public License as published by\n// the Free Software Foundation, either version 3 of the License, or\n// (at your option) any later version.\n//\n// Moodle is distributed in the hope that it will be useful,\n// but WITHOUT ANY WARRANTY; without even the implied warranty of\n// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n// GNU General Public License for more details.\n//\n// You should have received a copy of the GNU General Public License\n// along with Moodle. If not, see <http://www.gnu.org/licenses/>.\n\n/**\n * Javascript to initialise the Recently accessed courses block.\n *\n * @module block_recentlyaccessedcourses/main.js\n * @package block_recentlyaccessedcourses\n * @copyright 2018 Victor Deniz <victor@moodle.com>\n * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later\n */\n\ndefine(\n [\n 'jquery',\n 'core/custom_interaction_events',\n 'core/notification',\n 'core/pubsub',\n 'core/paged_content_paging_bar',\n 'core/templates',\n 'core_course/events',\n 'core_course/repository',\n 'core/aria',\n ],\n function(\n $,\n CustomEvents,\n Notification,\n PubSub,\n PagedContentPagingBar,\n Templates,\n CourseEvents,\n CoursesRepository,\n Aria\n ) {\n\n // Constants.\n var NUM_COURSES_TOTAL = 10;\n var SELECTORS = {\n BLOCK_CONTAINER: '[data-region=\"recentlyaccessedcourses\"]',\n CARD_CONTAINER: '[data-region=\"card-deck\"]',\n COURSE_IS_FAVOURITE: '[data-region=\"is-favourite\"]',\n CONTENT: '[data-region=\"view-content\"]',\n EMPTY_MESSAGE: '[data-region=\"empty-message\"]',\n LOADING_PLACEHOLDER: '[data-region=\"loading-placeholder\"]',\n PAGING_BAR: '[data-region=\"paging-bar\"]',\n PAGING_BAR_NEXT: '[data-control=\"next\"]',\n PAGING_BAR_PREVIOUS: '[data-control=\"previous\"]'\n };\n // Module variables.\n var contentLoaded = false;\n var allCourses = [];\n var visibleCoursesId = null;\n var cardWidth = null;\n var viewIndex = 0;\n var availableVisibleCards = 1;\n\n /**\n * Show the empty message when no course are found.\n *\n * @param {object} root The root element for the courses view.\n */\n var showEmptyMessage = function(root) {\n root.find(SELECTORS.EMPTY_MESSAGE).removeClass('hidden');\n root.find(SELECTORS.LOADING_PLACEHOLDER).addClass('hidden');\n root.find(SELECTORS.CONTENT).addClass('hidden');\n };\n\n /**\n * Show the empty message when no course are found.\n *\n * @param {object} root The root element for the courses view.\n */\n var showContent = function(root) {\n root.find(SELECTORS.CONTENT).removeClass('hidden');\n root.find(SELECTORS.EMPTY_MESSAGE).addClass('hidden');\n root.find(SELECTORS.LOADING_PLACEHOLDER).addClass('hidden');\n };\n\n /**\n * Show the paging bar.\n *\n * @param {object} root The root element for the courses view.\n */\n var showPagingBar = function(root) {\n var pagingBar = root.find(SELECTORS.PAGING_BAR);\n pagingBar.css('opacity', 1);\n pagingBar.css('visibility', 'visible');\n Aria.unhide(pagingBar);\n };\n\n /**\n * Hide the paging bar.\n *\n * @param {object} root The root element for the courses view.\n */\n var hidePagingBar = function(root) {\n var pagingBar = root.find(SELECTORS.PAGING_BAR);\n pagingBar.css('opacity', 0);\n pagingBar.css('visibility', 'hidden');\n Aria.hide(pagingBar);\n };\n\n /**\n * Show the favourite indicator for the given course (if it's in the list).\n *\n * @param {object} root The root element for the courses view.\n * @param {number} courseId The id of the course to be favourited.\n */\n var favouriteCourse = function(root, courseId) {\n allCourses.forEach(function(course) {\n if (course.attr('data-course-id') == courseId) {\n course.find(SELECTORS.COURSE_IS_FAVOURITE).removeClass('hidden');\n }\n });\n };\n\n /**\n * Hide the favourite indicator for the given course (if it's in the list).\n *\n * @param {object} root The root element for the courses view.\n * @param {number} courseId The id of the course to be unfavourited.\n */\n var unfavouriteCourse = function(root, courseId) {\n allCourses.forEach(function(course) {\n if (course.attr('data-course-id') == courseId) {\n course.find(SELECTORS.COURSE_IS_FAVOURITE).addClass('hidden');\n }\n });\n };\n\n /**\n * Render the a list of courses.\n *\n * @param {array} courses containing array of courses.\n * @return {promise} Resolved with list of rendered courses as jQuery objects.\n */\n var renderAllCourses = function(courses) {\n var showcoursecategory = $(SELECTORS.BLOCK_CONTAINER).data('displaycoursecategory');\n var promises = courses.map(function(course) {\n course.showcoursecategory = showcoursecategory;\n return Templates.render('block_recentlyaccessedcourses/course-card', course);\n });\n\n return $.when.apply(null, promises).then(function() {\n var renderedCourses = [];\n\n promises.forEach(function(promise) {\n promise.then(function(html) {\n renderedCourses.push($(html));\n return;\n })\n .catch(Notification.exception);\n });\n\n return renderedCourses;\n });\n };\n\n /**\n * Fetch user's recently accessed courses and reload the content of the block.\n *\n * @param {int} userid User whose courses will be shown\n * @returns {promise} The updated content for the block.\n */\n var loadContent = function(userid) {\n return CoursesRepository.getLastAccessedCourses(userid, NUM_COURSES_TOTAL)\n .then(function(courses) {\n return renderAllCourses(courses);\n });\n };\n\n /**\n * Recalculate the number of courses that should be visible.\n *\n * @param {object} root The root element for the courses view.\n */\n var recalculateVisibleCourses = function(root) {\n var container = root.find(SELECTORS.CONTENT).find(SELECTORS.CARD_CONTAINER);\n var availableWidth = parseFloat(root.css('width'));\n var numberOfCourses = allCourses.length;\n var start = 0;\n\n if (!cardWidth) {\n container.html(allCourses[0]);\n // Render one card initially to calculate the width of the cards\n // including the margins.\n cardWidth = allCourses[0].outerWidth(true);\n }\n\n availableVisibleCards = Math.floor(availableWidth / cardWidth);\n\n if (viewIndex + availableVisibleCards < numberOfCourses) {\n start = viewIndex;\n } else {\n var overflow = (viewIndex + availableVisibleCards) - numberOfCourses;\n start = viewIndex - overflow;\n start = start >= 0 ? start : 0;\n }\n\n // At least show one card.\n if (availableVisibleCards === 0) {\n availableVisibleCards = 1;\n }\n\n var coursesToShow = allCourses.slice(start, start + availableVisibleCards);\n // Create an id for the list of courses we expect to be displayed.\n var newVisibleCoursesId = coursesToShow.reduce(function(carry, course) {\n return carry + course.attr('data-course-id');\n }, '');\n\n // Centre the courses if we have an overflow of courses.\n if (allCourses.length > coursesToShow.length) {\n container.addClass('justify-content-center');\n container.removeClass('justify-content-start');\n } else {\n container.removeClass('justify-content-center');\n container.addClass('justify-content-start');\n }\n\n // Don't bother updating the DOM unless the visible courses have changed.\n if (visibleCoursesId != newVisibleCoursesId) {\n var pagingBar = root.find(PagedContentPagingBar.rootSelector);\n container.html(coursesToShow);\n visibleCoursesId = newVisibleCoursesId;\n\n if (availableVisibleCards >= allCourses.length) {\n hidePagingBar(root);\n } else {\n showPagingBar(root);\n\n if (viewIndex === 0) {\n PagedContentPagingBar.disablePreviousControlButtons(pagingBar);\n } else {\n PagedContentPagingBar.enablePreviousControlButtons(pagingBar);\n }\n\n if (viewIndex + availableVisibleCards >= allCourses.length) {\n PagedContentPagingBar.disableNextControlButtons(pagingBar);\n } else {\n PagedContentPagingBar.enableNextControlButtons(pagingBar);\n }\n }\n }\n };\n\n /**\n * Register event listeners for the block.\n *\n * @param {object} root The root element for the recentlyaccessedcourses block.\n */\n var registerEventListeners = function(root) {\n var resizeTimeout = null;\n var drawerToggling = false;\n\n PubSub.subscribe(CourseEvents.favourited, function(courseId) {\n favouriteCourse(root, courseId);\n });\n\n PubSub.subscribe(CourseEvents.unfavorited, function(courseId) {\n unfavouriteCourse(root, courseId);\n });\n\n PubSub.subscribe('nav-drawer-toggle-start', function() {\n if (!contentLoaded || !allCourses.length || drawerToggling) {\n // Nothing to recalculate.\n return;\n }\n\n drawerToggling = true;\n var recalculationCount = 0;\n // This function is going to recalculate the number of courses while\n // the nav drawer is opening or closes (up to a maximum of 5 recalcs).\n var doRecalculation = function() {\n setTimeout(function() {\n recalculateVisibleCourses(root);\n recalculationCount++;\n\n if (recalculationCount < 5 && drawerToggling) {\n // If we haven't done too many recalculations and the drawer\n // is still toggling then recurse.\n doRecalculation();\n }\n }, 100);\n };\n\n // Start the recalculations.\n doRecalculation(root);\n });\n\n PubSub.subscribe('nav-drawer-toggle-end', function() {\n drawerToggling = false;\n });\n\n $(window).on('resize', function() {\n if (!contentLoaded || !allCourses.length) {\n // Nothing to reclculate.\n return;\n }\n\n // Resize events fire rapidly so recalculating the visible courses each\n // time can be expensive. Let's debounce them,\n if (!resizeTimeout) {\n resizeTimeout = setTimeout(function() {\n resizeTimeout = null;\n recalculateVisibleCourses(root);\n // The recalculateVisibleCourses function will execute at a rate of 15fps.\n }, 66);\n }\n });\n\n CustomEvents.define(root, [CustomEvents.events.activate]);\n root.on(CustomEvents.events.activate, SELECTORS.PAGING_BAR_NEXT, function(e, data) {\n var button = $(e.target).closest(SELECTORS.PAGING_BAR_NEXT);\n if (!button.hasClass('disabled')) {\n viewIndex = viewIndex + availableVisibleCards;\n recalculateVisibleCourses(root);\n }\n\n data.originalEvent.preventDefault();\n });\n\n root.on(CustomEvents.events.activate, SELECTORS.PAGING_BAR_PREVIOUS, function(e, data) {\n var button = $(e.target).closest(SELECTORS.PAGING_BAR_PREVIOUS);\n if (!button.hasClass('disabled')) {\n viewIndex = viewIndex - availableVisibleCards;\n viewIndex = viewIndex < 0 ? 0 : viewIndex;\n recalculateVisibleCourses(root);\n }\n\n data.originalEvent.preventDefault();\n });\n };\n\n /**\n * Get and show the recent courses into the block.\n *\n * @param {int} userid User from which the courses will be obtained\n * @param {object} root The root element for the recentlyaccessedcourses block.\n */\n var init = function(userid, root) {\n root = $(root);\n\n registerEventListeners(root);\n loadContent(userid)\n .then(function(renderedCourses) {\n allCourses = renderedCourses;\n contentLoaded = true;\n\n if (allCourses.length) {\n showContent(root);\n recalculateVisibleCourses(root);\n } else {\n showEmptyMessage(root);\n }\n\n return;\n })\n .catch(Notification.exception);\n };\n\n return {\n init: init\n };\n });\n"],"file":"main.min.js"}