Proyectos de Subversion Moodle

{"version":3,"file":"submit.min.js","sources":["../src/submit.js"],"sourcesContent":["// 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 * Submit button JavaScript. All submit buttons will be automatically disabled once the form is\n * submitted, unless that submission results in an error/cancelling the submit.\n *\n * @module core_form/submit\n * @copyright 2019 The Open University\n * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later\n * @since 3.8\n */\n\nimport {eventTypes} from 'core_form/events';\n\n/** @property {number} ID for setInterval used when polling for download cookie */\nlet cookieListener = 0;\n\n/** @property {Array} Array of buttons that need re-enabling if we get a download cookie */\nconst cookieListeningButtons = [];\n\n/** @property {number} Number of files uploading. */\nlet currentUploadCount = 0;\n\n/** @property {Array} Array of buttons that need re-enabling if we get a upload process. */\nconst uploadListeningButtons = [];\n\n/** @property {Boolean} Is upload listeners registered? */\nlet uploadListenersRegistered = false;\n\n/**\n * Listens in case a download cookie is provided.\n *\n * This function is used to detect file downloads. If there is a file download then we get a\n * beforeunload event, but the page is never unloaded and when the file download completes we\n * should re-enable the buttons. We detect this by watching for a specific cookie.\n *\n * PHP function \\core_form\\util::form_download_complete() can be used to send this cookie.\n *\n * @param {HTMLElement} button Button to re-enable\n */\nconst listenForDownloadCookie = (button) => {\n    cookieListeningButtons.push(button);\n    if (!cookieListener) {\n        cookieListener = setInterval(() => {\n            // Look for cookie.\n            const parts = document.cookie.split(getCookieName() + '=');\n            if (parts.length == 2) {\n                // We found the cookie, so the file is ready. Expire the cookie and cancel polling.\n                clearDownloadCookie();\n                clearInterval(cookieListener);\n                cookieListener = 0;\n\n                // Re-enable all the buttons.\n                cookieListeningButtons.forEach((button) => {\n                    button.disabled = false;\n                });\n            }\n        }, 500);\n    }\n};\n\n/**\n * Gets a unique name for the download cookie.\n *\n * @returns {string} Cookie name\n */\nconst getCookieName = () => {\n    return 'moodledownload_' + M.cfg.sesskey;\n};\n\n/**\n * Clears the download cookie if there is one.\n */\nconst clearDownloadCookie = () => {\n    document.cookie = encodeURIComponent(getCookieName()) + '=deleted; expires=' + new Date(0).toUTCString();\n};\n\n/**\n * Enable submit buttons when all files are uploaded.\n */\nconst checkUploadCount = () => {\n    if (currentUploadCount) {\n        uploadListeningButtons.forEach(button => {\n            button.disabled = true;\n        });\n    } else {\n        uploadListeningButtons.forEach(button => {\n            button.disabled = false;\n        });\n    }\n};\n\n/**\n * Initialises submit buttons.\n *\n * @param {String} elementId Form button element\n * @listens event:uploadStarted\n * @listens event:uploadCompleted\n */\nexport const init = (elementId) => {\n    const button = document.getElementById(elementId);\n    if (button === null) {\n        // Exit early if invalid element id passed.\n        return;\n    }\n\n    // If buttons are disabled by default, we do not enable them when file upload completed event is fired.\n    if (!button.disabled) {\n        uploadListeningButtons.push(button);\n    }\n\n    if (!uploadListenersRegistered) {\n        // Add event listener for file upload start.\n        document.addEventListener(eventTypes.uploadStarted, () => {\n            currentUploadCount++;\n            checkUploadCount();\n        });\n\n        // Add event listener for file upload complete.\n        document.addEventListener(eventTypes.uploadCompleted, () => {\n            currentUploadCount--;\n            checkUploadCount();\n        });\n        uploadListenersRegistered = true;\n    }\n\n    // If the form has double submit protection disabled, do nothing.\n    if (button.form.dataset.doubleSubmitProtection === 'off') {\n        return;\n    }\n    button.form.addEventListener('submit', function(event) {\n        // Only disable it if the browser is really going to another page as a result of the\n        // submit.\n        const disableAction = function() {\n            // If the submit was cancelled, or the button is already disabled, don't do anything.\n            if (event.defaultPrevented || button.disabled) {\n                return;\n            }\n\n            button.disabled = true;\n            clearDownloadCookie();\n            listenForDownloadCookie(button);\n        };\n        window.addEventListener('beforeunload', disableAction);\n        // If there is no beforeunload event as a result of this form submit, then the form\n        // submit must have been cancelled, so don't disable the button if the page is\n        // unloaded later.\n        setTimeout(function() {\n            window.removeEventListener('beforeunload', disableAction);\n        }, 1);\n    }, false);\n};\n"],"names":["cookieListener","cookieListeningButtons","currentUploadCount","uploadListeningButtons","uploadListenersRegistered","getCookieName","M","cfg","sesskey","clearDownloadCookie","document","cookie","encodeURIComponent","Date","toUTCString","checkUploadCount","forEach","button","disabled","elementId","getElementById","push","addEventListener","eventTypes","uploadStarted","uploadCompleted","form","dataset","doubleSubmitProtection","event","disableAction","defaultPrevented","setInterval","split","length","clearInterval","listenForDownloadCookie","window","setTimeout","removeEventListener"],"mappings":";;;;;;;;;;IA4BIA,eAAiB,QAGfC,uBAAyB,OAG3BC,mBAAqB,QAGnBC,uBAAyB,OAG3BC,2BAA4B,QAuC1BC,cAAgB,IACX,kBAAoBC,EAAEC,IAAIC,QAM/BC,oBAAsB,KACxBC,SAASC,OAASC,mBAAmBP,iBAAmB,qBAAuB,IAAIQ,KAAK,GAAGC,eAMzFC,iBAAmB,KACjBb,mBACAC,uBAAuBa,SAAQC,SAC3BA,OAAOC,UAAW,KAGtBf,uBAAuBa,SAAQC,SAC3BA,OAAOC,UAAW,oBAYTC,kBACXF,OAASP,SAASU,eAAeD,WACxB,OAAXF,SAMCA,OAAOC,UACRf,uBAAuBkB,KAAKJ,QAG3Bb,4BAEDM,SAASY,iBAAiBC,mBAAWC,eAAe,KAChDtB,qBACAa,sBAIJL,SAASY,iBAAiBC,mBAAWE,iBAAiB,KAClDvB,qBACAa,sBAEJX,2BAA4B,GAImB,QAA/Ca,OAAOS,KAAKC,QAAQC,wBAGxBX,OAAOS,KAAKJ,iBAAiB,UAAU,SAASO,aAGtCC,cAAgB,WAEdD,MAAME,kBAAoBd,OAAOC,WAIrCD,OAAOC,UAAW,EAClBT,sBApGqBQ,CAAAA,SAC7BhB,uBAAuBoB,KAAKJ,QACvBjB,iBACDA,eAAiBgC,aAAY,KAGL,GADNtB,SAASC,OAAOsB,MAAM5B,gBAAkB,KAC5C6B,SAENzB,sBACA0B,cAAcnC,gBACdA,eAAiB,EAGjBC,uBAAuBe,SAASC,SAC5BA,OAAOC,UAAW,QAG3B,OAoFCkB,CAAwBnB,UAE5BoB,OAAOf,iBAAiB,eAAgBQ,eAIxCQ,YAAW,WACPD,OAAOE,oBAAoB,eAAgBT,iBAC5C,MACJ"}