RowParser.js•3 kB
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.RowParser = void 0;
const column_1 = require("./column");
const Token_1 = require("./Token");
const EMPTY_STRING = '';
class RowParser {
constructor(parserOptions) {
this.parserOptions = parserOptions;
this.columnParser = new column_1.ColumnParser(parserOptions);
}
static isEmptyRow(row) {
return row.join(EMPTY_STRING).replace(/\s+/g, EMPTY_STRING) === EMPTY_STRING;
}
parse(scanner) {
const { parserOptions } = this;
const { hasMoreData } = scanner;
const currentScanner = scanner;
const columns = [];
let currentToken = this.getStartToken(currentScanner, columns);
while (currentToken) {
if (Token_1.Token.isTokenRowDelimiter(currentToken)) {
currentScanner.advancePastToken(currentToken);
// if ends with CR and there is more data, keep unparsed due to possible
// coming LF in CRLF
if (!currentScanner.hasMoreCharacters &&
Token_1.Token.isTokenCarriageReturn(currentToken, parserOptions) &&
hasMoreData) {
return null;
}
currentScanner.truncateToCursor();
return columns;
}
if (!this.shouldSkipColumnParse(currentScanner, currentToken, columns)) {
const item = this.columnParser.parse(currentScanner);
if (item === null) {
return null;
}
columns.push(item);
}
currentToken = currentScanner.nextNonSpaceToken;
}
if (!hasMoreData) {
currentScanner.truncateToCursor();
return columns;
}
return null;
}
getStartToken(scanner, columns) {
const currentToken = scanner.nextNonSpaceToken;
if (currentToken !== null && Token_1.Token.isTokenDelimiter(currentToken, this.parserOptions)) {
columns.push('');
return scanner.nextNonSpaceToken;
}
return currentToken;
}
shouldSkipColumnParse(scanner, currentToken, columns) {
const { parserOptions } = this;
if (Token_1.Token.isTokenDelimiter(currentToken, parserOptions)) {
scanner.advancePastToken(currentToken);
// if the delimiter is at the end of a line
const nextToken = scanner.nextCharacterToken;
if (!scanner.hasMoreCharacters || (nextToken !== null && Token_1.Token.isTokenRowDelimiter(nextToken))) {
columns.push('');
return true;
}
if (nextToken !== null && Token_1.Token.isTokenDelimiter(nextToken, parserOptions)) {
columns.push('');
return true;
}
}
return false;
}
}
exports.RowParser = RowParser;
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