truncate-json/build/src/string.js

Truncate a JSON string

import stringByteSlice from"string-byte-slice";


export const truncateString=(value,maxSize)=>{
const jsonString=JSON.stringify(value);
const truncatedString=removeQuotes(jsonString);
const truncatedStringA=stringByteSlice(
truncatedString,
0,
maxSize-ELLIPSIS.length-QUOTE.length*2
);
const truncatedStringB=fixUnicodeSequenceEnd(truncatedStringA);
const truncatedStringC=`${truncatedStringB}${ELLIPSIS}`;
return addQuotes(truncatedStringC)
};

const fixUnicodeSequenceEnd=(truncatedString)=>
truncatedString.replace(INVALID_JSON_END,"");



const INVALID_JSON_END=/(\\|\\u[0-9a-fA-F]{0,3})$/u;

const removeQuotes=(jsonString)=>
jsonString.slice(QUOTE.length,-QUOTE.length);

const addQuotes=(truncatedString)=>`${QUOTE}${truncatedString}${QUOTE}`;

const QUOTE="\"";
const ELLIPSIS="...";