Find postscript font upto textstylerange and replace a new postscript name based on Input data.

Here's the code for the active text layer

//////////////////////////////////////////////////////
// define your csv-file 
// headers must be: "Findfont" and "Replacefont", case sensitive and without spaces 

var file = new File("C:\\1\\aaa.csv"); 

//////////////////////////////////////////////////////
// depending on the data in the csv-file, use the posrscipt name or just the name of the font. 
// ex. "Arial-BoldMT" => fontPostScriptName, "Arial" => fontName                               

var use_postscript_name = false;

//////////////////////////////////////////////////////

file.open("r");
var s = file.read();
file.close();

var data = csv_to_array(s);

replace_styles(activeDocument.activeLayer.id); 

alert("done");
 
//////////////////////////////////////////////////////
function replace_styles(layer_id) 
    {
    try {
        var r = new ActionReference(); 
        r.putEnumerated(stringIDToTypeID("textLayer"), stringIDToTypeID("ordinal"), stringIDToTypeID("targetEnum")); 
        var textKey = executeActionGet(r).getObjectValue(stringIDToTypeID("textKey"));
    
        var list = textKey.getList(stringIDToTypeID("textStyleRange"));
    
        var new_list = new ActionList(); 
    
        for (var i = 0; i < list.count; i++)
            {
            var d = list.getObjectValue(i);
        
            var fr = d.getInteger(stringIDToTypeID("from"));
            var to = d.getInteger(stringIDToTypeID("to"));
        
            var st = d.getObjectValue(stringIDToTypeID("textStyle"));
        
            var postscript_name = st.getString(stringIDToTypeID("fontPostScriptName")); 
            
            var font_name = st.getString(stringIDToTypeID("fontName"));  
        
            for (var x = 0; x < data.length; x++)
                {
                if (use_postscript_name)
                    {
                    if (postscript_name == data[x].Findfont)
                        {
                        st.putString(stringIDToTypeID("fontPostScriptName"), data[x].Replacefont);
                        st.erase(stringIDToTypeID("fontName"));
                        break;
                        }
                    }
                else
                    {
                    if (font_name == data[x].Findfont)
                        {
                        st.putString(stringIDToTypeID("fontName"), data[x].Replacefont);
                        st.erase(stringIDToTypeID("fontPostScriptName"));
                        break;
                        }
                    }
                }
        
            var d = new ActionDescriptor(); 
            d.putInteger(stringIDToTypeID("from"), fr); 
            d.putInteger(stringIDToTypeID("to"), to); 
            d.putObject(stringIDToTypeID("textStyle"), stringIDToTypeID("textStyle"), st); 
        
            new_list.putObject(stringIDToTypeID("textStyleRange"), d);
            }
    
        textKey.putList(stringIDToTypeID("textStyleRange"), new_list); 
    
        var d = new ActionDescriptor(); 
        var r = new ActionReference(); 
        r.putIdentifier(stringIDToTypeID("textLayer"), layer_id); 
        d.putReference(stringIDToTypeID("null"), r); 
        d.putObject(stringIDToTypeID("to"), stringIDToTypeID("textLayer"), textKey); 
    
        executeAction(stringIDToTypeID("set"), d, DialogModes.NO); 
        }
    catch(e) { alert(e); }
    }
    
//////////////////////////////////////////////////////
function csv_to_array(data, sep) 
    {
    try {
        if (sep == undefined) sep = /[;,]/;
    
        var lines = data.split(/\r\n|\n/);
        var headers = lines[0].split(sep);
        var ret = new Array();
    
        for (var i = 1; i < lines.length; i++) 
            {
            var data = lines[i].split(sep);
    
            if (data.length == headers.length) 
                {
                var o = new Object();
                for (var j = 0; j < headers.length; j++) 
                    {
                    o[headers[j]] = data[j];
                    }
    
                ret.push(o);
                }
            }
    
        return ret;
        }
    catch(e) { alert(e); }
    }