How to apply escape characters to the individual string in the string variable

Question

String variable content is dynamic and the parameters may change which means I cannot use json compose and apply replace function. I need to search for the specified string value eg. Special_Instructions and apply escape characters to " as \\" and new lines as \n.

What would be the best approach here?

Answer 1

Hi @Krzysztof Nowicki,

Below is the design which does the ask:

Firstly, I had set the string variable as below:

Then in JavaScript Action, used below code:

function rithreplacefunc(jsonString) {

    const ri_match = jsonString.match(/"Special_Instructions"\s*:\s*"(.*?)"(\s*,\s*"\w+":)/s);

    

    if (ri_match) {

        let gotVal = ri_match[1]; 

        let choVal = gotVal.replace(/"/g, '\\"');

let evalue = choVal.replace(/\n/g, '\\n')

        return jsonString.replace(ri_match[0], `"Special_Instructions": "${evalue}"${ri_match[2]}`);

    }

    throw new Error("Hello Rithwik, Special_Instructions property not found in the given JSON string.");

}

let cho_ri_data = workflowContext.actions.Set_variable.inputs.value;

if (!cho_ri_data || typeof cho_ri_data !== "string") {

    throw new Error("Hello Rithwik, Set_variable.inputs.value is undefined, incorrect, or not a JSON string.");

}

let riout = rithreplacefunc(cho_ri_data);

return riout;

Output:

Hope this helps.

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