Current File : /opt/bitnami/apps/moodle/htdocs.backup/message/amd/build/message_drawer_lazy_load_list.min.js.map
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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 * Lazy loaded list of items.\n *\n * @module core_message/message_drawer_lazy_load_list\n * @package message\n * @copyright 2018 Ryan Wyllie <ryan@moodle.com>\n * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later\n */\ndefine(\n[\n 'jquery',\n 'core/custom_interaction_events'\n],\nfunction(\n $,\n CustomEvents\n) {\n\n var SELECTORS = {\n ROOT: '[data-region=\"lazy-load-list\"]',\n LOADING_ICON_CONTAINER: '[data-region=\"loading-icon-container\"]',\n CONTENT_CONTAINER: '[data-region=\"content-container\"]',\n EMPTY_MESSAGE: '[data-region=\"empty-message-container\"]',\n PLACEHOLDER: '[data-region=\"placeholder-container\"]'\n };\n\n /**\n * Flag element as loading.\n *\n * @param {Object} root The section container element.\n */\n var startLoading = function(root) {\n root.attr('data-loading', true);\n };\n\n /**\n * Flag element as not loading.\n *\n * @param {Object} root The section container element.\n */\n var stopLoading = function(root) {\n root.attr('data-loading', false);\n };\n\n /**\n * Check if the element is loading.\n *\n * @param {Object} root The section container element.\n * @return {Bool}\n */\n var isLoading = function(root) {\n return root.attr('data-loading') === 'true';\n };\n\n /**\n * Get user id\n *\n * @param {Object} root The section container element.\n * @return {Number} Logged in user id.\n */\n var getUserId = function(root) {\n return root.attr('data-user-id');\n };\n\n /**\n * Get the section content container element.\n *\n * @param {Object} root The section container element.\n * @return {Object} The section content container element.\n */\n var getContentContainer = function(root) {\n return root.find(SELECTORS.CONTENT_CONTAINER);\n };\n\n /**\n * Get the root element.\n *\n * @param {Object} containerElement The container element to search in.\n * @return {Object} The list root element.\n */\n var getRoot = function(containerElement) {\n return containerElement.find(SELECTORS.ROOT);\n };\n\n /**\n * Show the loading icon.\n *\n * @param {Object} root The section container element.\n */\n var showLoadingIcon = function(root) {\n root.find(SELECTORS.LOADING_ICON_CONTAINER).removeClass('hidden');\n };\n\n /**\n * Hide the loading icon.\n *\n * @param {Object} root The section container element.\n */\n var hideLoadingIcon = function(root) {\n root.find(SELECTORS.LOADING_ICON_CONTAINER).addClass('hidden');\n };\n\n /**\n * Show the empty message.\n *\n * @param {Object} root The section container element.\n */\n var showEmptyMessage = function(root) {\n root.find(SELECTORS.EMPTY_MESSAGE).removeClass('hidden');\n };\n\n /**\n * Hide the empty message.\n *\n * @param {Object} root The section container element.\n */\n var hideEmptyMessage = function(root) {\n root.find(SELECTORS.EMPTY_MESSAGE).addClass('hidden');\n };\n\n /**\n * Show the placeholder element.\n *\n * @param {Object} root The section container element.\n */\n var showPlaceholder = function(root) {\n root.find(SELECTORS.PLACEHOLDER).removeClass('hidden');\n };\n\n /**\n * Hide the placeholder element.\n *\n * @param {Object} root The section container element.\n */\n var hidePlaceholder = function(root) {\n root.find(SELECTORS.PLACEHOLDER).addClass('hidden');\n };\n\n /**\n * Show the section content container.\n *\n * @param {Object} root The section container element.\n */\n var showContent = function(root) {\n getContentContainer(root).removeClass('hidden');\n };\n\n /**\n * Hide the section content container.\n *\n * @param {Object} root The section container element.\n */\n var hideContent = function(root) {\n getContentContainer(root).addClass('hidden');\n };\n\n /**\n * If the section has loaded all content.\n *\n * @param {Object} root The section container element.\n * @return {Bool}\n */\n var hasLoadedAll = function(root) {\n return root.attr('data-loaded-all') == 'true';\n };\n\n /**\n * If the section has loaded all content.\n *\n * @param {Object} root The section container element.\n * @param {Bool} value If all items have been loaded.\n */\n var setLoadedAll = function(root, value) {\n root.attr('data-loaded-all', value);\n };\n\n /**\n * If the section can load more items.\n *\n * @param {Object} root The section container element.\n * @return {Bool}\n */\n var canLoadMore = function(root) {\n return !hasLoadedAll(root) && !isLoading(root);\n };\n\n /**\n * Load all items in this container from callback and render them.\n *\n * @param {Object} root The section container element.\n * @param {Function} loadCallback The callback to load items.\n * @param {Function} renderCallback The callback to render the results.\n * @return {Object} jQuery promise\n */\n var loadAndRender = function(root, loadCallback, renderCallback) {\n var userId = getUserId(root);\n startLoading(root);\n\n return loadCallback(root, userId)\n .then(function(items) {\n if (items.length > 0) {\n var contentContainer = getContentContainer(root);\n return renderCallback(contentContainer, items, userId)\n .then(function() {\n return items;\n });\n } else {\n return items;\n }\n })\n .then(function(items) {\n stopLoading(root);\n root.attr('data-seen', true);\n\n if (!items.length) {\n setLoadedAll(root, true);\n }\n\n return items;\n })\n .catch(function() {\n stopLoading(root);\n root.attr('data-seen', true);\n return;\n });\n };\n\n /**\n * First load of this section.\n *\n * @param {Object} root The section container element.\n * @param {Function} loadCallback The callback to load items.\n * @param {Function} renderCallback The callback to render the results.\n * @return {Object} promise\n */\n var initialLoadAndRender = function(root, loadCallback, renderCallback) {\n getContentContainer(root).empty();\n showPlaceholder(root);\n hideContent(root);\n return loadAndRender(root, loadCallback, renderCallback)\n .then(function(items) {\n hidePlaceholder(root);\n\n if (!items.length) {\n showEmptyMessage(root);\n } else {\n showContent(root);\n }\n\n return;\n })\n .catch(function() {\n hidePlaceholder(root);\n showContent(root);\n return;\n });\n };\n\n /**\n * Listen to, and handle events in this section.\n *\n * @param {Object} root The section container element.\n * @param {Function} loadCallback The callback to load items.\n * @param {Function} renderCallback The callback to render the results.\n */\n var registerEventListeners = function(root, loadCallback, renderCallback) {\n CustomEvents.define(root, [\n CustomEvents.events.scrollBottom\n ]);\n\n root.on(CustomEvents.events.scrollBottom, function() {\n if (canLoadMore(root)) {\n showLoadingIcon(root);\n loadAndRender(root, loadCallback, renderCallback)\n .then(function() {\n return hideLoadingIcon(root);\n })\n .catch(function() {\n return hideLoadingIcon(root);\n });\n }\n });\n };\n\n /**\n * Setup the section.\n *\n * @param {Object} root The section container element.\n * @param {Function} loadCallback The 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