Created
August 21, 2018 05:10
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Finds Invalid Special Characters In Password
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<!-- 21 Aug 2018 --> | |
<html> | |
<head lang='en-US' > | |
<meta charset='UTF-8' /> | |
<meta content='text/html; charset=UTF-8' http-equiv='content-type' /> | |
<title>Find Invalid Special Characters In Password</title> | |
<script> | |
function $(id) { return document.getElementById(id); } | |
function init() | |
{ | |
let allSpecialChars, considerValidSpecialChars, validOrInvalidSpecialChars, maxNoOfCharsPerRow; | |
let showCharactersChoice; | |
let invalidCharsTablesDiv = $('invalid-chars-tbls'); | |
let invalidCharsTables = invalidCharsTablesDiv.children; | |
let templateTbl = invalidCharsTables[0]; | |
templateTbl.remove(); | |
let passwordTf = $('password'); | |
let validate = () => | |
{ | |
let password = passwordTf.value; | |
if (!password) | |
{ | |
clearRemainingElements(invalidCharsTables, 0); | |
return; | |
} | |
let row0, row1; | |
let cells0, cells1; | |
let cellNo = 0, tableNo = 0, charNo = 0; | |
for (let c of password) | |
{ | |
if (cellNo % maxNoOfCharsPerRow === 0) | |
{ | |
if (cells0) | |
clearRemainingElementsForMultipleEls(cellNo, cells0, cells1); | |
let table = invalidCharsTables[tableNo++]; | |
if (!table) | |
{ | |
table = templateTbl.cloneNode(true); | |
table.title = 'Click to position the cursor at this character in Password'; | |
invalidCharsTablesDiv.append(table); | |
table.addEventListener('click', e => | |
{ | |
let el = e.target; | |
if (el.tagName !== 'TD') | |
return; | |
let tr = el.parentNode; | |
let prevTr = tr.previousElementSibling; | |
if (prevTr) | |
{ | |
let i = [...tr.children].indexOf(el); | |
el = prevTr.children[i]; | |
} | |
let i = el.textContent - 1; | |
placeCursorAtThePosition(passwordTf, i); | |
}); | |
} | |
[row0, row1] = table.rows; | |
let display = showCharacterNumberCb.checked ? 'table-row' : 'none'; | |
row0.style.display = display; | |
[cells0, cells1] = [row0.cells, row1.cells]; | |
cellNo = 0; | |
} | |
let cell0 = cells0[cellNo]; | |
let cell1 = cells1[cellNo]; | |
if (!cell0) | |
{ | |
cell0 = row0.insertCell(); | |
cell1 = row1.insertCell(); | |
} | |
let isValid; | |
if (validOrInvalidSpecialChars.has(c)) | |
isValid = considerValidSpecialChars; | |
else if (!allSpecialChars.has(c)) | |
isValid = true; | |
else | |
isValid = !considerValidSpecialChars; | |
if (isValid) | |
{ | |
cell0.classList.remove('error'); | |
cell1.classList.remove('error'); | |
} | |
else | |
{ | |
cell0.classList.add('error'); | |
cell1.classList.add('error'); | |
} | |
cell0.textContent = ++charNo; | |
cellNo++; | |
if (showCharactersChoice === 'show-only-invalid-characters') | |
cell1.textContent = isValid ? '*' : c; | |
else if (showCharactersChoice === 'show-all-characters') | |
cell1.textContent = c; | |
else if (showCharactersChoice === 'mask-all-characters') | |
cell1.textContent = '*'; | |
else | |
throw new Error(`Invalid choice '${showCharactersChoice}'`); | |
} | |
clearRemainingElementsForMultipleEls(cellNo, cells0, cells1); | |
clearRemainingElements(invalidCharsTables, tableNo); | |
}; | |
function clearRemainingElementsForMultipleEls(index, ...els) | |
{ | |
for (let el of els) | |
clearRemainingElements(el, index); | |
} | |
callAndAddSlowListener($('all-special-chars'), 'input', el => { allSpecialChars = new Set(el.value); }, validate); | |
{ | |
let el = document.querySelector('input[type=radio][name=valid-or-invalid-special-chars-radio]'); | |
let action = () => | |
{ | |
considerValidSpecialChars = el.checked; | |
validate(); | |
}; | |
el.parentNode.parentNode.addEventListener('click', e => | |
{ | |
let el = e.target; | |
if (el.tagName === 'INPUT') | |
action(); | |
}); | |
action(); | |
} | |
callAndAddSlowListener($('valid-or-invalid-special-chars-tf'), 'input', el => { validOrInvalidSpecialChars = new Set(el.value); }, validate); | |
{ | |
let el = $('max-chars-per-row'); | |
let action = () => | |
{ | |
let value = +el.value; | |
maxNoOfCharsPerRow = (isNaN(value) || value < 1) ? 20 : value; | |
validate(); | |
}; | |
slowListener(el, 'input', action); | |
action(); | |
} | |
let settingsTd = $('show-characters-settings'); | |
let showCharacterNumberCb = settingsTd.querySelector('input[type=checkbox]'); | |
let showOrHideNumberRows = () => | |
{ | |
let display = showCharacterNumberCb.checked ? 'table-row' : 'none'; | |
for (let table of invalidCharsTables) | |
table.rows[0].style.display = display; | |
}; | |
let extractRadioValue = () => settingsTd.querySelector('input[name=chars-in-output]:checked').value; | |
showCharactersChoice = extractRadioValue(); | |
settingsTd.addEventListener('click', e => | |
{ | |
let el = e.target; | |
if (el.tagName !== 'INPUT') | |
return; | |
if (el.type === 'checkbox') | |
showOrHideNumberRows(); | |
else | |
{ | |
showCharactersChoice = extractRadioValue(); | |
validate(); | |
} | |
}); | |
// showOrHideNumberRows(); | |
slowListener($('password'), 'input', validate); | |
} | |
function callAndAddSlowListener(el, eventType, update, validate, delayInMillis = 200) | |
{ | |
update(el); | |
let combined = () => { update(el); validate(); }; | |
slowListener(el, eventType, combined, delayInMillis); | |
} | |
function slowListener(el, eventType, action, delayInMillis) | |
{ | |
let timerId; | |
el.addEventListener(eventType, e => | |
{ | |
clearTimeout(timerId); | |
timerId = setTimeout(action, delayInMillis); | |
}); | |
} | |
function clearRemainingElements(liveEls, index) | |
{ | |
for (let start = liveEls.length - 1; start >= index; liveEls[start--].remove()); | |
} | |
function placeCursorAtThePosition(tf, pos) | |
{ | |
tf.setSelectionRange(pos, pos); | |
tf.focus(); | |
} | |
</script> | |
<style> | |
body { | |
font-family: monospace; | |
font-size: 1rem; | |
display: flex; | |
justify-content: center; | |
align-items: center; | |
flex-direction: column; | |
} | |
#show-characters-settings label { | |
display: inline-block; | |
margin: 0.2em 0; | |
} | |
input[type=radio], input[type=checkbox] { | |
vertical-align: text-bottom; | |
} | |
#invalid-chars-tbls table { | |
margin: 0.5rem 0; | |
} | |
#invalid-chars-tbls td { | |
width: 2.5rem; | |
padding: 0 0.5rem; | |
height: 1rem; | |
text-align: center; | |
cursor: pointer; | |
} | |
#invalid-chars-tbls td:hover { | |
font-weight: bold; | |
} | |
.error { | |
color: red; | |
} | |
</style> | |
</head> | |
<body onload='init()'> | |
<table> | |
<tr><td>All special characters: </td><td><input id='all-special-chars' type='text' value='`~!@#$%^&*()-_=+[]{}\|;:'",.<>/? '/></td></tr> | |
<tr> | |
<td> | |
<label><input name='valid-or-invalid-special-chars-radio' type='radio' checked='checked' />Valid</label> | |
<label><input name='valid-or-invalid-special-chars-radio' type='radio' />Invalid</label> | |
special characters: | |
</td> | |
<td> | |
<input id='valid-or-invalid-special-chars-tf' type='text' value='($#^@\&%_.~!*)' /> | |
</td> | |
</tr> | |
<tr><td>Password: </td><td><input id='password' type='password' /></td></tr> | |
<tr><td>Maximum number of characters per row: </td><td><input id='max-chars-per-row' type='number' min='1' value='20' style='width: 4rem' /></td></tr> | |
<tr><td colspan='2'></td></tr> | |
<tr><td colspan='2'></td></tr> | |
<tr> | |
<td colspan='2' style='text-align: center'> | |
<span id='show-characters-settings' style='display: inline-block; text-align: left'> | |
<label><input name='char-num-in-output' type='checkbox' checked='checked' />Show character number</label><br><br> | |
<label><input name='chars-in-output' type='radio' value='mask-all-characters' />Mask all characters</label><br> | |
<label><input name='chars-in-output' type='radio' value='show-only-invalid-characters' checked='checked' />Show only invalid characters</label><br> | |
<label><input name='chars-in-output' type='radio' value='show-all-characters' />Show all characters</label> | |
</span> | |
</td> | |
</tr> | |
</table> | |
<div id='invalid-chars-tbls'> | |
<table border='1' style='border-collapse: collapse'><tr></tr><tr></tr></table> | |
</div> | |
</body> | |
</html> |
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View it, rendered as HTML here: https://cdn.rawgit.com/VenkataRaju/a23678e94060f2b1749555d915846d11/raw/2c1fc1ffe6d8e00c9a94f912d7b3a16e227c9150/Find%20Invalid%20Special%20Characters%20In%20Password.html