advanced-search-query/src/utils.ts

Another parser for advanced search query syntax.

export function getQuotePairMap(str?: string | null) {
  if (!str) str = ''
  const quotePairMap: {
    single: Record<number, boolean>
    double: Record<number, boolean>
  } = { single: {}, double: {} }

  const prevQuote = { single: -1, double: -1 }
  let prevChar = ''
  for (let i = 0; i < str.length; i++) {
    const char = str[i]
    if (prevChar !== '\\') {
      if (char === '"') {
        if (prevQuote.double >= 0) {
          quotePairMap.double[prevQuote.double] = true
          quotePairMap.double[i] = true
          prevQuote.double = -1
        } else {
          prevQuote.double = i
        }
      } else if (char === "'") {
        if (prevQuote.single >= 0) {
          quotePairMap.single[prevQuote.single] = true
          quotePairMap.single[i] = true
          prevQuote.single = -1
        } else {
          prevQuote.single = i
        }
      }
    }
    prevChar = char
  }

  return quotePairMap
}