compromise/src/terms/tagger/contraction/03-easyOnes.js

natural language processing in the browser

'use strict';
const fixContraction = require('./fix');

//the formulaic contraction types:
const easy_ends = {
  'll': 'will',
  'd': 'would',
  've': 'have',
  're': 'are',
  'm': 'am',
  'n\'t': 'not'
//these ones are a bit tricksier:
// 't': 'not',
// 's': 'is' //or was
};

//unambiguous contractions, like "'ll"
const easyOnes = (ts) => {
  for(let i = 0; i < ts.terms.length; i++) {
    //skip existing
    if (ts.terms[i].silent_term) {
      continue;
    }
    let parts = ts.terms[i].term.contraction();
    if (parts) {
      //make sure its an easy one
      if (easy_ends[parts.end]) {
        let arr = [
          parts.start,
          easy_ends[parts.end]
        ];
        ts = fixContraction(ts, arr, i);
        i += 1;
      }
    }
  }
  return ts;
};
module.exports = easyOnes;