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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 * Manage the timeline courses view for the timeline block.\n *\n * @package    block_timeline\n * @copyright  2018 Ryan Wyllie <[email protected]>\n * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later\n */\n\ndefine(\n[\n    'jquery',\n    'core/notification',\n    'core/custom_interaction_events',\n    'core/str',\n    'core/templates',\n    'block_timeline/event_list',\n    'core_course/repository',\n    'block_timeline/calendar_events_repository'\n],\nfunction(\n    $,\n    Notification,\n    CustomEvents,\n    Str,\n    Templates,\n    EventList,\n    CourseRepository,\n    EventsRepository\n) {\n\n    var SELECTORS = {\n        MORE_COURSES_BUTTON: '[data-action=\"more-courses\"]',\n        MORE_COURSES_BUTTON_CONTAINER: '[data-region=\"more-courses-button-container\"]',\n        NO_COURSES_EMPTY_MESSAGE: '[data-region=\"no-courses-empty-message\"]',\n        COURSES_LIST: '[data-region=\"courses-list\"]',\n        COURSE_ITEMS_LOADING_PLACEHOLDER: '[data-region=\"course-items-loading-placeholder\"]',\n        COURSE_EVENTS_CONTAINER: '[data-region=\"course-events-container\"]',\n        COURSE_NAME: '[data-region=\"course-name\"]',\n        LOADING_ICON: '.loading-icon'\n    };\n\n    var TEMPLATES = {\n        COURSE_ITEMS: 'block_timeline/course-items',\n        LOADING_ICON: 'core/loading'\n    };\n\n    var COURSE_CLASSIFICATION = 'inprogress';\n    var COURSE_SORT = 'fullname asc';\n    var COURSE_EVENT_LIMIT = 5;\n    var COURSE_LIMIT = 2;\n    var SECONDS_IN_DAY = 60 * 60 * 24;\n\n    /**\n     * Hide the loading placeholder elements.\n     *\n     * @param {object} root The rool element.\n     */\n    var hideLoadingPlaceholder = function(root) {\n        root.find(SELECTORS.COURSE_ITEMS_LOADING_PLACEHOLDER).addClass('hidden');\n    };\n\n    /**\n     * Hide the \"more courses\" button.\n     *\n     * @param {object} root The rool element.\n     */\n    var hideMoreCoursesButton = function(root) {\n        root.find(SELECTORS.MORE_COURSES_BUTTON_CONTAINER).addClass('hidden');\n    };\n\n    /**\n     * Show the \"more courses\" button.\n     *\n     * @param {object} root The rool element.\n     */\n    var showMoreCoursesButton = function(root) {\n        root.find(SELECTORS.MORE_COURSES_BUTTON_CONTAINER).removeClass('hidden');\n    };\n\n    /**\n     * Disable the \"more courses\" button and show the loading spinner.\n     *\n     * @param {object} root The rool element.\n     */\n    var enableMoreCoursesButtonLoading = function(root) {\n        var button = root.find(SELECTORS.MORE_COURSES_BUTTON);\n        button.prop('disabled', true);\n        Templates.render(TEMPLATES.LOADING_ICON, {})\n            .then(function(html) {\n                button.append(html);\n                return html;\n            })\n            .catch(function() {\n                // It's not important if this false so just do so silently.\n                return false;\n            });\n    };\n\n    /**\n     * Enable the \"more courses\" button and remove the loading spinner.\n     *\n     * @param {object} root The rool element.\n     */\n    var disableMoreCoursesButtonLoading = function(root) {\n        var button = root.find(SELECTORS.MORE_COURSES_BUTTON);\n        button.prop('disabled', false);\n        button.find(SELECTORS.LOADING_ICON).remove();\n    };\n\n    /**\n     * Display the message for when there are no courses available.\n     *\n     * @param {object} root The rool element.\n     */\n    var showNoCoursesEmptyMessage = function(root) {\n        root.find(SELECTORS.NO_COURSES_EMPTY_MESSAGE).removeClass('hidden');\n    };\n\n    /**\n     * Render the course items HTML to the page.\n     *\n     * @param {object} root The rool element.\n     * @param {string} html The course items HTML to render.\n     */\n    var renderCourseItemsHTML = function(root, html) {\n        var container = root.find(SELECTORS.COURSES_LIST);\n        Templates.appendNodeContents(container, html, '');\n    };\n\n    /**\n     * Check if any courses have been loaded.\n     *\n     * @param {object} root The rool element.\n     * @return {bool}\n     */\n    var hasLoadedCourses = function(root) {\n        return root.find(SELECTORS.COURSE_EVENTS_CONTAINER).length > 0;\n    };\n\n    /**\n     * Return the offset value for fetching courses.\n     *\n     * @param {object} root The rool element.\n     * @return {Number}\n     */\n    var getOffset = function(root) {\n        return parseInt(root.attr('data-offset'), 10);\n    };\n\n    /**\n     * Set the offset value for fetching courses.\n     *\n     * @param {object} root The rool element.\n     * @param {Number} offset Offset value.\n     */\n    var setOffset = function(root, offset) {\n        root.attr('data-offset', offset);\n    };\n\n    /**\n     * Return the limit value for fetching courses.\n     *\n     * @param {object} root The rool element.\n     * @return {Number}\n     */\n    var getLimit = function(root) {\n        return parseInt(root.attr('data-limit'), 10);\n    };\n\n    /**\n     * Return the days offset value for fetching events.\n     *\n     * @param {object} root The rool element.\n     * @return {Number}\n     */\n    var getDaysOffset = function(root) {\n        return parseInt(root.attr('data-days-offset'), 10);\n    };\n\n    /**\n     * Return the days limit value for fetching events. The days\n     * limit is optional so undefined will be returned if it isn't\n     * set.\n     *\n     * @param {object} root The rool element.\n     * @return {int|undefined}\n     */\n    var getDaysLimit = function(root) {\n        var daysLimit = root.attr('data-days-limit');\n        return daysLimit != undefined ? parseInt(daysLimit, 10) : undefined;\n    };\n\n    /**\n     * Return the timestamp for the user's midnight.\n     *\n     * @param {object} root The rool element.\n     * @return {Number}\n     */\n    var getMidnight = function(root) {\n        return parseInt(root.attr('data-midnight'), 10);\n    };\n\n    /**\n     * Return the start time for fetching events. This is calculated\n     * based on the user's midnight value so that timezones are\n     * preserved.\n     *\n     * @param {object} root The rool element.\n     * @return {Number}\n     */\n    var getStartTime = function(root) {\n        var midnight = getMidnight(root);\n        var daysOffset = getDaysOffset(root);\n        return midnight + (daysOffset * SECONDS_IN_DAY);\n    };\n\n    /**\n     * Return the end time for fetching events. This is calculated\n     * based on the user's midnight value so that timezones are\n     * preserved.\n     *\n     * @param {object} root The rool element.\n     * @return {Number}\n     */\n    var getEndTime = function(root) {\n        var midnight = getMidnight(root);\n        var daysLimit = getDaysLimit(root);\n        return daysLimit != undefined ? midnight + (daysLimit * SECONDS_IN_DAY) : false;\n    };\n\n    /**\n     * Get a list of events for the given course ids. Returns a promise that will\n     * be resolved with the events.\n     *\n     * @param {array} courseIds The list of course ids to fetch events for.\n     * @param {Number} startTime Timestamp to fetch events from.\n     * @param {Number} limit Limit to the number of events (this applies per course, not total)\n     * @param {Number} endTime Timestamp to fetch events to.\n     * @return {object} jQuery promise.\n     */\n    var getEventsForCourseIds = function(courseIds, startTime, limit, endTime) {\n        var args = {\n            courseids: courseIds,\n            starttime: startTime,\n            limit: limit\n        };\n\n        if (endTime) {\n            args.endtime = endTime;\n        }\n\n        return EventsRepository.queryByCourses(args);\n    };\n\n    /**\n     * Get the last time the events were reloaded.\n     *\n     * @param {object} root The rool element.\n     * @return {Number}\n     */\n    var getEventReloadTime = function(root) {\n        return root.data('last-event-load-time');\n    };\n\n    /**\n     * Set the last time the events were reloaded.\n     *\n     * @param {object} root The rool element.\n     * @param {Number} time Timestamp in milliseconds.\n     */\n    var setEventReloadTime = function(root, time) {\n        root.data('last-event-load-time', time);\n    };\n\n    /**\n     * Check if events have begun reloading since the given\n     * time.\n     *\n     * @param {object} root The rool element.\n     * @param {Number} time Timestamp in milliseconds.\n     * @return {bool}\n     */\n    var hasReloadedEventsSince = function(root, time) {\n        return getEventReloadTime(root) > time;\n    };\n\n    /**\n     * Send a request to the server to load the events for the courses.\n     *\n     * @param {array} courses List of course objects.\n     * @param {Number} startTime Timestamp to load events after.\n     * @param {int|undefined} endTime Timestamp to load events up until.\n     * @return {object} jQuery promise resolved with the events.\n     */\n    var loadEventsForCourses = function(courses, startTime, endTime) {\n        var courseIds = courses.map(function(course) {\n            return course.id;\n        });\n\n        return getEventsForCourseIds(courseIds, startTime, COURSE_EVENT_LIMIT + 1, endTime);\n    };\n\n    /**\n     * Render the courses in the DOM once the server has returned the courses.\n     *\n     * @param {array} courses List of course objects.\n     * @param {object} root The root element\n     * @param {Number} midnight The midnight timestamp in the user's timezone.\n     * @param {Number} daysOffset Number of days from today to offset the events.\n     * @param {Number} daysLimit Number of days from today to limit the events to.\n     * @param {string} noEventsURL URL for the image to display for no events.\n     * @return {object} jQuery promise resolved after rendering is complete.\n     */\n    var updateDisplayFromCourses = function(courses, root, midnight, daysOffset, daysLimit, noEventsURL) {\n        // Render the courses template.\n        return Templates.render(TEMPLATES.COURSE_ITEMS, {\n            courses: courses,\n            midnight: midnight,\n            hasdaysoffset: true,\n            hasdayslimit: daysLimit != undefined,\n            daysoffset: daysOffset,\n            dayslimit: daysLimit,\n            nodayslimit: daysLimit == undefined,\n            urls: {\n                noevents: noEventsURL\n            }\n        }).then(function(html) {\n            hideLoadingPlaceholder(root);\n\n            if (html) {\n                // Template rendering is complete and we have the HTML so we can\n                // add it to the DOM.\n                renderCourseItemsHTML(root, html);\n            } else {\n                if (!hasLoadedCourses(root)) {\n                    // There were no courses to render so show the empty placeholder\n                    // message for the user to tell them.\n                    showNoCoursesEmptyMessage(root);\n                }\n            }\n\n            return html;\n        })\n        .then(function(html) {\n            if (courses.length < COURSE_LIMIT) {\n                // We know there aren't any more courses because we got back less\n                // than we asked for so hide the button to request more.\n                hideMoreCoursesButton(root);\n            } else {\n                // Make sure the button is visible if there are more courses to load.\n                showMoreCoursesButton(root);\n            }\n\n            return html;\n        })\n        .catch(function() {\n            hideLoadingPlaceholder(root);\n        });\n    };\n\n    /**\n     * Find all of the visible course blocks and initialise the event\n     * list module to being loading the events for the course block.\n     *\n     * @param {object} root The root element for the timeline courses view.\n     * @return {object} jQuery promise resolved with courses and events.\n     */\n    var loadMoreCourses = function(root) {\n        var offset = getOffset(root);\n        var limit = getLimit(root);\n\n        // Start loading the next set of courses.\n        return CourseRepository.getEnrolledCoursesByTimelineClassification(\n            COURSE_CLASSIFICATION,\n            limit,\n            offset,\n            COURSE_SORT\n        ).then(function(result) {\n            var startEventLoadingTime = Date.now();\n            var courses = result.courses;\n            var nextOffset = result.nextoffset;\n            var daysOffset = getDaysOffset(root);\n            var daysLimit = getDaysLimit(root);\n            var midnight = getMidnight(root);\n            var startTime = getStartTime(root);\n            var endTime = getEndTime(root);\n            var noEventsURL = root.attr('data-no-events-url');\n            // Record the next offset if we want to request more courses.\n            setOffset(root, nextOffset);\n            // Load the events for these courses.\n            var eventsPromise = loadEventsForCourses(courses, startTime, endTime);\n            // Render the courses in the DOM.\n            var renderPromise = updateDisplayFromCourses(courses, root, midnight, daysOffset, daysLimit, noEventsURL);\n\n            return $.when(eventsPromise, renderPromise)\n                .then(function(eventsByCourse) {\n                    if (hasReloadedEventsSince(root, startEventLoadingTime)) {\n                        // All of the events are being reloaded so ignore our results.\n                        return eventsByCourse;\n                    }\n\n                    // When we've got all of the courses and events we can render the events in the\n                    // correct course event list.\n                    courses.forEach(function(course) {\n                        var courseId = course.id;\n                        var events = [];\n                        var containerSelector = '[data-region=\"course-events-container\"][data-course-id=\"' + courseId + '\"]';\n                        var courseEventsContainer = root.find(containerSelector);\n                        var eventListRoot = courseEventsContainer.find(EventList.rootSelector);\n                        var courseGroups = eventsByCourse.groupedbycourse.filter(function(group) {\n                            return group.courseid == courseId;\n                        });\n\n                        if (courseGroups.length) {\n                            // Get the events for this course.\n                            events = courseGroups[0].events;\n                        }\n\n                        // Create a preloaded page to pass to the event list because we've already\n                        // loaded the first page of events.\n                        var pageOnePreload = $.Deferred().resolve({events: events}).promise();\n                        // Initialise the event list pagination area for this course.\n                        Str.get_string('ariaeventlistpaginationnavcourses', 'block_timeline', course.fullnamedisplay)\n                            .then(function(string) {\n                                EventList.init(eventListRoot, COURSE_EVENT_LIMIT, {'1': pageOnePreload}, string);\n                                return string;\n                            })\n                            .catch(function() {\n                                // An error is ok, just render with the default string.\n                                EventList.init(eventListRoot, COURSE_EVENT_LIMIT, {'1': pageOnePreload});\n                            });\n                    });\n\n                    return eventsByCourse;\n                });\n        }).catch(Notification.exception);\n    };\n\n    /**\n     * Reload the events for all of the visible courses. These events will be loaded\n     * in a single request to the server.\n     *\n     * @param {object} root The root element.\n     * @return {object} jQuery promise resolved with courses and events.\n     */\n    var reloadCourseEvents = function(root) {\n        var startReloadTime = Date.now();\n        var startTime = getStartTime(root);\n        var endTime = getEndTime(root);\n        var courseEventsContainers = root.find(SELECTORS.COURSE_EVENTS_CONTAINER);\n        var courseIds = courseEventsContainers.map(function() {\n            return $(this).attr('data-course-id');\n        }).get();\n\n        // Record when we started our request.\n        setEventReloadTime(root, startReloadTime);\n\n        // Load all of the events for the given courses.\n        return getEventsForCourseIds(courseIds, startTime, COURSE_EVENT_LIMIT + 1, endTime)\n            .then(function(eventsByCourse) {\n                if (hasReloadedEventsSince(root, startReloadTime)) {\n                    // A new reload has begun so ignore our results.\n                    return eventsByCourse;\n                }\n\n                courseEventsContainers.each(function(index, container) {\n                    container = $(container);\n                    var courseId = container.attr('data-course-id');\n                    var courseName = container.find(SELECTORS.COURSE_NAME).text();\n                    var eventListContainer = container.find(EventList.rootSelector);\n                    var pageDeferred = $.Deferred();\n                    var events = [];\n                    var courseGroups = eventsByCourse.groupedbycourse.filter(function(group) {\n                        return group.courseid == courseId;\n                    });\n\n                    if (courseGroups.length) {\n                        // Get the events just for this course.\n                        events = courseGroups[0].events;\n                    }\n\n                    pageDeferred.resolve({events: events});\n\n                    // Re-initialise the events list with the preloaded events we just got from\n                    // the server.\n                    Str.get_string('ariaeventlistpaginationnavcourses', 'block_timeline', courseName)\n                        .then(function(string) {\n                            EventList.init(eventListContainer, COURSE_EVENT_LIMIT, {'1': pageDeferred.promise()}, string);\n                            return string;\n                        })\n                        .catch(function() {\n                            // Ignore a failure to load the string. Just render with the default string.\n                            EventList.init(eventListContainer, COURSE_EVENT_LIMIT, {'1': pageDeferred.promise()});\n                        });\n                });\n\n                return eventsByCourse;\n            }).catch(Notification.exception);\n    };\n\n    /**\n     * Add event listeners to load more courses for the courses view.\n     *\n     * @param {object} root The root element for the timeline courses view.\n     */\n    var registerEventListeners = function(root) {\n        CustomEvents.define(root, [CustomEvents.events.activate]);\n        // Show more courses and load their events when the user clicks the \"more courses\"\n        // button.\n        root.on(CustomEvents.events.activate, SELECTORS.MORE_COURSES_BUTTON, function(e, data) {\n            enableMoreCoursesButtonLoading(root);\n            loadMoreCourses(root)\n                .then(function() {\n                    disableMoreCoursesButtonLoading(root);\n                    return;\n                })\n                .catch(function() {\n                    disableMoreCoursesButtonLoading(root);\n                });\n\n            if (data) {\n                data.originalEvent.preventDefault();\n                data.originalEvent.stopPropagation();\n            }\n            e.stopPropagation();\n        });\n    };\n\n    /**\n     * Initialise the timeline courses view. Begin loading the events\n     * if this view is active. Add the relevant event listeners.\n     *\n     * This function should only be called once per page load because it\n     * is adding event listeners to the page.\n     *\n     * @param {object} root The root element for the timeline courses view.\n     */\n    var init = function(root) {\n        root = $(root);\n\n        setEventReloadTime(root, Date.now());\n\n        if (root.hasClass('active')) {\n            // Only load if this is active otherwise it will be lazy loaded later.\n            loadMoreCourses(root);\n            root.attr('data-seen', true);\n        }\n\n        registerEventListeners(root);\n    };\n\n    /**\n     * Reset the element back to it's initial state. Begin loading the events again\n     * if this view is active.\n     *\n     * @param {object} root The root element for the timeline courses view.\n     */\n    var reset = function(root) {\n        root.removeAttr('data-seen');\n        if (root.hasClass('active')) {\n            shown(root);\n        }\n    };\n\n    /**\n     * If this is the first time this view has been displayed then begin loading\n     * the events.\n     *\n     * @param {object} root The root element for the timeline courses view.\n     */\n    var shown = function(root) {\n        if (!root.attr('data-seen')) {\n            if (hasLoadedCourses(root)) {\n                // This isn't the first time this view is shown so just reload the\n                // events for the courses we've already loaded.\n                reloadCourseEvents(root);\n            } else {\n                // We haven't loaded any courses yet so do that now.\n                loadMoreCourses(root);\n            }\n\n            root.attr('data-seen', true);\n        }\n    };\n\n    return {\n        init: init,\n        reset: reset,\n        shown: shown\n    };\n});\n"],"file":"view_courses.min.js"}