tabulator-tables/src/js/modules/Import/defaults/importers/csv.js

Interactive table generation JavaScript library

function csvImporter(input){
	var data = [],
	row = 0, 
	col = 0,
	inQuote = false;
    
	//Iterate over each character
	for (let index = 0; index < input.length; index++) {
		let char = input[index], 
		nextChar = input[index+1];      
        
		//Initialize empty row
		if(!data[row]){
			data[row] = [];
		}

		//Initialize empty column
		if(!data[row][col]){
			data[row][col] = "";
		}
        
		//Handle quotation mark inside string
		if (char == '"' && inQuote && nextChar == '"') { 
			data[row][col] += char; 
			index++;
			continue; 
		}
        
		//Begin / End Quote
		if (char == '"') { 
			inQuote = !inQuote;
			continue;
		}
        
		//Next column (if not in quote)
		if (char == ',' && !inQuote) { 
			col++;
			continue; 
		}
        
		//New row if new line and not in quote (CRLF) 
		if (char == '\r' && nextChar == '\n' && !inQuote) { 
			col = 0; 
			row++; 
			index++; 
			continue; 
		}
        
		//New row if new line and not in quote (CR or LF) 
		if ((char == '\r' || char == '\n') && !inQuote) { 
			col = 0;
			row++;
			continue; 
		}

		//Normal Character, append to column
		data[row][col] += char;
	}

	return data;
}

export default csvImporter;