Before BR, Update - true
Condition: current.description.changes();
Choose the table name (Incident or Story, etc.) and field name (description) on the condition - as per your requirement.
(function executeRule(current, previous) {
if (!current.description.changes()) return;
var oldDesc = (previous.description || '').trim();
var newDesc = (current.description || '').trim();
function tokenize(text) {
return text
.replace(/\r\n/g, '\n')
.split(/(\n+)/)
.map(function(chunk) {
return chunk.match(/^\n+$/) ? chunk : chunk.trim().split(/\s+/);
})
.reduce(function(a, b) { return a.concat(b); }, [])
.filter(function(w) { return w !== ''; });
}
var oldWords = tokenize(oldDesc),
newWords = tokenize(newDesc),
m = oldWords.length,
n = newWords.length;
// LCS matrix
var L = [];
for (var i = 0; i <= m; i++) L[i] = Array(n + 1).fill(0);
for (i = m - 1; i >= 0; i--) {
for (var j = n - 1; j >= 0; j--) {
L[i][j] = oldWords[i] === newWords[j]
? L[i + 1][j + 1] + 1
: Math.max(L[i + 1][j], L[i][j + 1]);
}
}
// Backtrack into diff
var ops = [], i = 0, j = 0;
while (i < m || j < n) {
if (i < m && j < n && oldWords[i] === newWords[j]) {
ops.push({ op: 'equal', word: oldWords[i] }); i++; j++;
} else if (j < n && (i === m || L[i][j + 1] >= L[i + 1][j])) {
ops.push({ op: 'insert', word: newWords[j] }); j++;
} else {
ops.push({ op: 'delete', word: oldWords[i] }); i++;
}
}
// Format spans
var newHtml = '', oldHtml = '';
ops.forEach(function(o) {
if (o.op === 'equal') {
newHtml += o.word + ' ';
oldHtml += o.word + ' ';
} else if (o.op === 'insert') {
newHtml += '<span style="color:blue;">' + o.word + '</span> ';
} else if (o.op === 'delete') {
oldHtml += '<span style="color:red;text-decoration:line-through;">' + o.word + '</span> ';
}
});
// Timestamps
var newTimestamp = new GlideDateTime().getDisplayValue(); // now
var oldTimestamp = previous.sys_updated_on.getDisplayValue(); // when previous was saved
// Build output with labeled timestamps
var journalHtml =
'[code]' +
'<div style="color:gray;font-size:smaller;">New text as of: ' + newTimestamp + '</div>' +
'<div>' + newHtml.trim() + '</div>' +
'<br/>' +
'<div style="font-style:italic;">was</div>' +
'<br/>' +
'<div style="color:gray;font-size:smaller;">Old text as of: ' + oldTimestamp + '</div>' +
'<div>' + oldHtml.trim() + '</div>' +
'[/code]';
// Write to work notes (respects journal + HTML rendering)
current.work_notes = journalHtml;
})(current, previous);
OUTPUT:
OUTPUT AFTER IMPROVISATION:
Fig: Differentiate Work notes with timestamp
Note - The reason why we didn't fetch the input from Work notes rather choose a string field (Description) as input and performed the required HTML operation on it, and then output it into a journal entry field like 'Work notes' is because we don't want to alter the very basic structure of the journal entry field 'Work notes' here. I have rather chose 'Work notes' just as a medium to display the formatted string, which ultimately serves the purpose.
Regards,
Anish Reghu
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