tests_dicom_pages_anonymiser.js
// Do not warn if these variables were not defined before.
/* global dwv */
// call setup on DOM loaded
document.addEventListener('DOMContentLoaded', onDOMContentLoaded);
/**
* Setup.
*/
function onDOMContentLoaded() {
const infileInput = document.getElementById('infile');
infileInput.onchange = onInputDICOMFile;
const inrulesfileInput = document.getElementById('inrulesfile');
inrulesfileInput.onchange = onInputRulesFile;
const jsonlintButton = document.getElementById('jsonlint');
jsonlintButton.onclick = launchJSONLint;
const saveButton = document.getElementById('save');
saveButton.onclick = saveRules;
const generateButton = document.getElementById('generate');
generateButton.onclick = generate;
// logger level (optional)
dwv.logger.level = dwv.logger.levels.DEBUG;
}
// rules file
let _rulesFile = null;
// dicom file
let _dicomFile = null;
// DICOM elements
let _dicomElements = null;
/**
* Handle DICOM file load.
*
* @param {object} event The onload event.
*/
function onLoadDICOMFile(event) {
// parse DICOM
const parser = new dwv.DicomParser();
parser.parse(event.target.result);
// store elements
_dicomElements = parser.getDicomElements();
// activate generate button
const element = document.getElementById('generate');
element.className = 'button button-active';
}
/**
* Generate DICOM data.
*/
function generate() {
// check validity
if (!isValidRules()) {
return;
}
// create writer with textarea rules
const writer = new dwv.DicomWriter();
const addMissingTags = true;
writer.setRules(
JSON.parse(document.getElementById('rules').value),
addMissingTags);
let dicomBuffer = null;
try {
dicomBuffer = writer.getBuffer(_dicomElements);
} catch (error) {
console.error(error);
alert(error.message);
}
// view as Blob to allow download
const blob = new Blob([dicomBuffer], {type: 'application/dicom'});
// update generate button
const element = document.getElementById('generate');
element.href = URL.createObjectURL(blob);
element.download = 'anonym-' + _dicomFile.name;
}
/**
* Save the rules as a JSON file.
*/
function saveRules() {
// check validity
if (!isValidRules()) {
return;
}
// get text from the textarea
const text = document.getElementById('rules').value;
// view as Blob to allow download
const blob = new Blob([text], {type: 'text/plain'});
// update save button
const element = document.getElementById('save');
element.download = (_rulesFile === null ? 'rules.json' : _rulesFile.name);
element.href = URL.createObjectURL(blob);
}
/**
* Is the JSON valid?
*
* @returns {boolean} True if the input JSON is valid.
*/
function isValidRules() {
try {
JSON.parse(document.getElementById('rules').value);
} catch {
alert('The JSON is not valid, please check it with JSONLint.');
return false;
}
return true;
}
/**
* Open JSONLint to check the rules.
*/
function launchJSONLint() {
const text = document.getElementById('rules').value;
const link = 'http://jsonlint.com/?json=' + encodeURIComponent(text);
window.open(link);
}
/**
* Handle input DICOM file.
*
* @param {object} event The input field event.
*/
function onInputDICOMFile(event) {
if (event.target.files.length === 0) {
return;
}
_dicomFile = event.target.files[0];
const reader = new FileReader();
reader.onload = onLoadDICOMFile;
reader.readAsArrayBuffer(_dicomFile);
}
/**
* Handle input rules file.
*
* @param {object} event The input field event.
*/
function onInputRulesFile(event) {
if (event.target.files.length === 0) {
return;
}
_rulesFile = event.target.files[0];
const reader = new FileReader();
reader.onload = function (event) {
document.getElementById('rules').value = event.target.result;
};
reader.readAsText(_rulesFile);
}