Proyectos de Subversion Moodle

// This file is part of Moodle - http://moodle.org/

//

// Moodle is free software: you can redistribute it and/or modify

// it under the terms of the GNU General Public License as published by

// the Free Software Foundation, either version 3 of the License, or

// (at your option) any later version.

//

// Moodle is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

//

// You should have received a copy of the GNU General Public License

// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**

 * Module responsible for handling forum summary report filters.

 *

 * @module     forumreport_summary/filters

 * @copyright  2019 Michael Hawkins <michaelh@moodle.com>

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

import $ from 'jquery';

import {createPopper} from 'core/popper2';

import CustomEvents from 'core/custom_interaction_events';

import Selectors from 'forumreport_summary/selectors';

import Ajax from 'core/ajax';

import KeyCodes from 'core/key_codes';

import * as FormChangeChecker from 'core_form/changechecker';

export const init = (root) => {

    let jqRoot = $(root);

    // Hide loading spinner and show report once page is ready.

    // This ensures filters can be applied when sorting by columns.

    $(document).ready(function() {

        $('.loading-icon').hide();

        $('#summaryreport').removeClass('hidden');

    });

    // Generic filter handlers.

    // Called to override click event to trigger a proper generate request with filtering.

    const generateWithFilters = (event, getparams) => {

        let currentLink = document.forms.filtersform.action,

            newLink;

        if (event) {

            event.preventDefault();

           let currentSplit = currentLink.split('?'),

               currentstring = currentSplit[1],

               newparamsarray = getparams.split('&'),

               paramsstring = '',

               paramkeys = [],

               paramvalues = [];

            // Separate out the existing action GET param string.

            currentstring.split('&').forEach(function(param) {

                let splitparam = param.split('=');

                paramkeys.push(splitparam[0]);

                paramvalues.push(splitparam[1]);

            });

            newparamsarray.forEach(function(paramstring) {

                let newparam = paramstring.split('='),

                    existingkey = paramkeys.indexOf(newparam[0]);

                // Overwrite value if existing, otherwise add new param.

                if (existingkey > -1) {

                    paramvalues[existingkey] = newparam[1];

                } else {

                    paramkeys.push(newparam[0]);

                    paramvalues.push(newparam[1]);

                }

            });

            // Build URL.

            paramkeys.forEach(function(name, key) {

                paramsstring += `&${name}=${paramvalues[key]}`;

            });

            newLink = currentSplit[0] + '?' + paramsstring.substr(1);

        } else {

            newLink = currentLink;

        }

        document.forms.filtersform.action = newLink;

        document.forms.filtersform.submit();

    };

    // Override 'reset table preferences' so it generates with filters.

    $('.resettable').on("click", "a", function(event) {

        generateWithFilters(event, event.target.search.substr(1));

    });

    // Override table heading sort links so they generate with filters.

    $('thead').on("click", "a", function(event) {

        generateWithFilters(event, event.target.search.substr(1));

    });

    // Override pagination page links so they generate with filters.

    $('.pagination').on("click", "a", function(event) {

        generateWithFilters(event, event.target.search.substr(1));

    });

    // Override rows per page submission so it generates with filters.

    if (document.forms.selectperpage) {

        document.forms.selectperpage.onsubmit = (event) => {

            let getparam = 'perpage=' + document.forms.selectperpage.elements.perpage.value;

            generateWithFilters(event, getparam);

        };

    }

    // Override download link so the file is generated with filters.

    const downloadForm = document.getElementById('summaryreport').querySelector('form.dataformatselector');

    if (downloadForm) {

        downloadForm.onsubmit = (event) => {

            const downloadType = downloadForm.querySelector('#downloadtype_download').value;

            const getParams = `download=${downloadType}`;

            const prevAction = document.forms.filtersform.action;

            generateWithFilters(event, getParams);

            // Revert action, so re-submitting the form via filter does not trigger a further download.

            document.forms.filtersform.action = prevAction;

        };

    }

    // Submit report via filter

    const submitWithFilter = (containerelement) => {

        // Disable the dates filter mform checker to prevent any changes triggering a warning to the user.

        FormChangeChecker.unWatchForm(document.forms.filtersform);

        // Close the container (eg popover).

        $(containerelement).addClass('hidden');

        // Submit the filter values and re-generate report.

        generateWithFilters(false);

    };

    // Use popper to override date mform calendar position.

    const updateCalendarPosition = (referenceid) => {

        let referenceElement = document.querySelector(referenceid),

            popperContent = document.querySelector(Selectors.filters.date.calendar);

        popperContent.style.removeProperty("z-index");

        createPopper(referenceElement, popperContent, {placement: 'bottom-end'});

    };

    // Close the relevant filter.

    const closeOpenFilters = (openFilterButton, openFilter) => {

        openFilter.classList.add('hidden');

        openFilter.setAttribute('data-openfilter', 'false');

        openFilterButton.classList.add('btn-primary');

        openFilterButton.classList.remove('btn-outline-primary');

        openFilterButton.setAttribute('aria-expanded', false);

    };

    // Groups filter specific handlers.

    // Event handler for clicking select all groups.

    jqRoot.on(CustomEvents.events.activate, Selectors.filters.group.selectall, function() {

        let deselected = root.querySelectorAll(Selectors.filters.group.checkbox + ':not(:checked)');

        deselected.forEach(function(checkbox) {

            checkbox.checked = true;

        });

    });

    // Event handler for clearing filter by clicking option.

    jqRoot.on(CustomEvents.events.activate, Selectors.filters.group.clear, function() {

        // Clear checkboxes.

        let selected = root.querySelectorAll(Selectors.filters.group.checkbox + ':checked');

        selected.forEach(function(checkbox) {

            checkbox.checked = false;

        });

    });

    // Event handler for showing groups filter popover.

    jqRoot.on(CustomEvents.events.activate, Selectors.filters.group.trigger, function() {

        // Create popover.

        let referenceElement = root.querySelector(Selectors.filters.group.trigger),

            popperContent = root.querySelector(Selectors.filters.group.popover);

        createPopper(referenceElement, popperContent, {placement: 'bottom-end'});

        // Show popover.

        popperContent.classList.remove('hidden');

        popperContent.setAttribute('data-openfilter', 'true');

        // Change to outlined button.

        referenceElement.classList.add('btn-outline-primary');

        referenceElement.classList.remove('btn-primary');

        // Let screen readers know that it's now expanded.

        referenceElement.setAttribute('aria-expanded', true);

        // Add listeners to handle closing filter.

        const closeListener = e => {

            if (e.target.id !== referenceElement.id && popperContent !== e.target.closest('[data-openfilter="true"]') &&

                    (typeof e.keyCode === 'undefined' || e.keyCode === KeyCodes.enter || e.keyCode === KeyCodes.space)) {

                closeOpenFilters(referenceElement, popperContent);

                document.removeEventListener('click', closeListener);

                document.removeEventListener('keyup', closeListener);

                document.removeEventListener('keyup', escCloseListener);

            }

        };

        document.addEventListener('click', closeListener);

        document.addEventListener('keyup', closeListener);

        const escCloseListener = e => {

            if (e.keyCode === KeyCodes.escape) {

                closeOpenFilters(referenceElement, popperContent);

                document.removeEventListener('keyup', escCloseListener);

                document.removeEventListener('click', closeListener);

            }

        };

        document.addEventListener('keyup', escCloseListener);

    });

    // Event handler to click save groups filter.

    jqRoot.on(CustomEvents.events.activate, Selectors.filters.group.save, function() {

        // Copy the saved values into the form before submitting.

        let popcheckboxes = root.querySelectorAll(Selectors.filters.group.checkbox);

        popcheckboxes.forEach(function(popcheckbox) {

            let filtersform = document.forms.filtersform,

                saveid = popcheckbox.getAttribute('data-saveid');

            filtersform.querySelector(`#${saveid}`).checked = popcheckbox.checked;

        });

        submitWithFilter('#filter-groups-popover');

    });

    // Listeners for export buttons.

    // These allow fetching of the relevant export URL, before submitting the request with

    // any POST data that is common to all of the export links. This allows filters to be

    // applied that contain potentially a lot of data (eg discussion IDs for groups filtering).

    document.querySelectorAll(Selectors.filters.exportlink.link).forEach(function(exportbutton) {

        exportbutton.addEventListener('click', function(event) {

            document.forms.exportlinkform.action = event.target.dataset.url;

            document.forms.exportlinkform.submit();

        });

    });

    // Dates filter specific handlers.

   // Event handler for showing dates filter popover.

    jqRoot.on(CustomEvents.events.activate, Selectors.filters.date.trigger, function() {

        // Create popover.

        let referenceElement = root.querySelector(Selectors.filters.date.trigger),

            popperContent = root.querySelector(Selectors.filters.date.popover);

        createPopper(referenceElement, popperContent, {placement: 'bottom-end'});

        // Show popover and move focus.

        popperContent.classList.remove('hidden');

        popperContent.setAttribute('data-openfilter', 'true');

        popperContent.querySelector('[name="filterdatefrompopover[enabled]"]').focus();

        // Change to outlined button.

        referenceElement.classList.add('btn-outline-primary');

        referenceElement.classList.remove('btn-primary');

        // Let screen readers know that it's now expanded.

        referenceElement.setAttribute('aria-expanded', true);

        // Add listener to handle closing filter.

        const closeListener = e => {

            if (e.target.id !== referenceElement.id && popperContent !== e.target.closest('[data-openfilter="true"]') &&

                    (typeof e.keyCode === 'undefined' || e.keyCode === KeyCodes.enter || e.keyCode === KeyCodes.space)) {

                closeOpenFilters(referenceElement, popperContent);

                document.removeEventListener('click', closeListener);

                document.removeEventListener('keyup', closeListener);

                document.removeEventListener('keyup', escCloseListener);

            }

        };

        document.addEventListener('click', closeListener);

        document.addEventListener('keyup', closeListener);

        const escCloseListener = e => {

            if (e.keyCode === KeyCodes.escape) {

                closeOpenFilters(referenceElement, popperContent);

                document.removeEventListener('keyup', escCloseListener);

                document.removeEventListener('click', closeListener);

            }

        };

        document.addEventListener('keyup', escCloseListener);

    });

    // Event handler to save dates filter.

    jqRoot.on(CustomEvents.events.activate, Selectors.filters.date.save, function() {

        // Populate the hidden form inputs to submit the data.

        let filtersForm = document.forms.filtersform;

        const datesPopover = root.querySelector(Selectors.filters.date.popover);

        const fromEnabled = datesPopover.querySelector('[name="filterdatefrompopover[enabled]"]').checked ? 1 : 0;

        const toEnabled = datesPopover.querySelector('[name="filterdatetopopover[enabled]"]').checked ? 1 : 0;

        if (!fromEnabled && !toEnabled) {

            // Update the elements in the filter form.

            filtersForm.elements['datefrom[timestamp]'].value = 0;

            filtersForm.elements['datefrom[enabled]'].value = fromEnabled;

            filtersForm.elements['dateto[timestamp]'].value = 0;

            filtersForm.elements['dateto[enabled]'].value = toEnabled;

            // Submit the filter values and re-generate report.

            submitWithFilter('#filter-dates-popover');

        } else {

            let args = {data: []};

            if (fromEnabled) {

                args.data.push({

                    'key': 'from',

                    'year': datesPopover.querySelector('[name="filterdatefrompopover[year]"]').value,

                    'month': datesPopover.querySelector('[name="filterdatefrompopover[month]"]').value,

                    'day': datesPopover.querySelector('[name="filterdatefrompopover[day]"]').value,

                    'hour': 0,

                    'minute': 0

                });

            }

            if (toEnabled) {

                args.data.push({

                    'key': 'to',

                    'year': datesPopover.querySelector('[name="filterdatetopopover[year]"]').value,

                    'month': datesPopover.querySelector('[name="filterdatetopopover[month]"]').value,

                    'day': datesPopover.querySelector('[name="filterdatetopopover[day]"]').value,

                    'hour': 23,

                    'minute': 59

                });

            }

            const request = {

                methodname: 'core_calendar_get_timestamps',

                args: args

            };

            Ajax.call([request])[0].done(function(result) {

                let fromTimestamp = 0,

                    toTimestamp = 0;

                result.timestamps.forEach(function(data) {

                    if (data.key === 'from') {

                        fromTimestamp = data.timestamp;

                    } else if (data.key === 'to') {

                        toTimestamp = data.timestamp;

                    }

                });

                // Display an error if the from date is later than the do date.

                if (toTimestamp > 0 && fromTimestamp > toTimestamp) {

                    const warningdiv = document.getElementById('dates-filter-warning');

                    warningdiv.classList.remove('hidden');

                    warningdiv.classList.add('d-block');

                } else {

                    filtersForm.elements['datefrom[timestamp]'].value = fromTimestamp;

                    filtersForm.elements['datefrom[enabled]'].value = fromEnabled;

                    filtersForm.elements['dateto[timestamp]'].value = toTimestamp;

                    filtersForm.elements['dateto[enabled]'].value = toEnabled;

                    // Submit the filter values and re-generate report.

                    submitWithFilter('#filter-dates-popover');

                }

            });

        }

    });

    jqRoot.on(CustomEvents.events.activate, Selectors.filters.date.calendariconfrom, function() {

        updateCalendarPosition(Selectors.filters.date.calendariconfrom);

    });

    jqRoot.on(CustomEvents.events.activate, Selectors.filters.date.calendariconto, function() {

        updateCalendarPosition(Selectors.filters.date.calendariconto);

    });

};