Javascript grammatical personalization library

personalize.js

/**
 * A function that takes a template and grammatical options ('gender', 'person', 'name') and returns the computed string.
 * See below for examples.
 *
 * See wikipedia for more on grammar: 
 * http://en.wikipedia.org/wiki/English_personal_pronouns
 * http://en.wikipedia.org/wiki/Grammatical_conjugation
 */
function personalize(template, options) {
  var GENDERS = ['neutral', 'female', 'male'];
  var PERSONS = ['first', 'second', 'third'];

  var CASES = ['subjective', 'objective', 'possessive', 'reflexive'];
  var PRONOUNS = {
    'first': {
      'subjective': 'I',
      'objective': 'me',
      'possessive': 'my',
      'reflexive': 'myself'
    },
    'second': {
      'subjective': 'you',
      'objective': 'you',
      'possessive': 'your',
      'reflexive': 'yourself'
    },
    'third': {
      'neutral': {
        'subjective': 'they',
        'objective' : 'them',
        'possessive': 'their',
        'reflexive' : 'themself'
      },
      'female': {
        'subjective': 'she',
        'objective' : 'her',
        'possessive': 'her',
        'reflexive' : 'herself'
      }, 
      'male': {
        'subjective': 'he',
        'objective' : 'him',
        'possessive': 'his',
        'reflexive' : 'himself'        
      }
    }
  };

  var VERBS = ['are', 'are|not', 'have', 'have|not'];
  var CONJUGATIONS = {
    'first': {
      'have': 'have',
      'have|not': 'haven\'t',
      'are': 'am',
      'are|not': 'am not'
    },
    'second': {
      'have': 'have',
      'have|not': 'haven\'t',
      'are': 'are',
      'are|not': 'aren\'t'
    },
    'third': {
      'have': 'has',
      'have|not': 'hasn\'t',
      'are': 'is',
      'are|not': 'isn\'t'
    }
  };

  var gender = options.gender || 'neutral';
  var person = options.person || 'third';
  var name   = options.name   || 'Anon';

  var result = template;

  var ABBREVIATIONS = {
    'have': '\'ve',
    'has': '\'s',
    'are': '\'re',
    'is': '\'s',
    'am': '\'m'
    };
  
  function replaceVerb(str, whitespace, match) {
    var replacer = CONJUGATIONS[person][match];
    return ABBREVIATIONS[replacer] || whitespace + replacer; 
  }

  for (var i = 0; i < VERBS.length; i++) {
    var verb = VERBS[i];
    result = result.replace(new RegExp('(\\s*){{\\s*(' + verb + '[|not]*)\\s*}}','g'), replaceVerb);
  }
  
  function replacePronoun(str, match) {
     var replacer = '';
      if (person == 'third') {
        if (match.indexOf('|name') > -1) {
          replacer = name;
        } else {
          replacer = PRONOUNS[person][gender][pronoun_case];
        }
      } else {
        replacer = PRONOUNS[person][pronoun_case];
        if (match.charAt(0) == match.charAt(0).toUpperCase()) {
          replacer = replacer.charAt(0).toUpperCase() + replacer.slice(1);
        }
      }
      return replacer;
  }

  for (var i = 0; i < CASES.length; i++) {
    var pronoun_case = CASES[i];
    var template_pronoun = PRONOUNS.third.neutral[pronoun_case];
    result = result.replace(new RegExp('{{\\s*(' + template_pronoun + '[|name]*)\\s*}}','gi'), replacePronoun);
  }
  
  return result;
}

// Demo of the library
var templates = ['{{ They|name }} {{ have }} been on a wild ride this week - {{ they }} {{ are }} going through a lot.',
                 '{{ They|name }} {{ have|not }} done anything naughty this week.',
                 'Many letters were sent to {{ them|name }} from {{ their }} adoring fans.'];

var configs = [{gender: 'female', person: 'first', name: 'Rihanna'},
               {gender: 'female', person: 'second', name: 'Rihanna'},
               {gender: 'female', person: 'third', name: 'Rihanna'},
               {gender: 'male', person: 'third', name: 'Chris'},
               
              ];

for (var j = 0; j < templates.length; j++) {
  var template = templates[j];
  document.write('<br><br><b>' + template + '</b><br>');
  for (var i = 0; i < configs.length; i++) {
    var templated = personalize(template, configs[i]);
    document.write(templated + '<br>');
  }
}