PickOne

pickOne.js

var _ = require('lodash');
var fs = require("fs");
var path = require('path');
var DataGenerator = (function () {
    var instance;
    var lines = fs.readFileSync(path.join(__dirname, '../actionData/alice.txt')).toString().split('\n');
    lines = lines.filter(function(line) {
      return (line.length > 0)
    })
    function init() {
      var pickOne = function(arr) {
        var len =arr.length;
        var rnd = Math.floor(Math.random() * (len));
        return arr[rnd];
      }
      var pickYear = function(start,end) {
        return pickOne(_.range(start,end))
      }  
      var pickMonth = function() {
        return pickOne(_.range(12))+1
      }   
      var pickDay = function() {
        return pickOne(_.range(30))+1
      } 
      var pickHour = function() {
        var d1 = pickOne(_.range(9));
        var d2 = pickOne(_.range(2));
        if (d2 === 2) {
          if ((d1 >= 4) && (d1 <= 7)) d1 = d1 - 4 
          if ((d1 >= 8) && (d1 <= 9)) d1 = d1 - 6 
        }
        return [d2,d1].join('');
      }   
      var pickMin = function() {
        var d1 = pickOne(_.range(10));
        var d2 = pickOne(_.range(6));
        return [d2,d1].join('');
      }  
      var pickLine = function() {
        return pickOne(lines) 
      }     
      var pickWord = function(size) {
        var wordSize = 0;
        while(wordSize < size) {
          var line = pickOne(lines).split(' ');
          var word = pickOne(line);
          wordSize = word.length;
        }
        return word
      } 
      var pickWords = function(number) {
        var words = _.range(number).map(function() {
          var line = pickOne(lines).split(' ');
          return pickOne(line);
        })
        return words
      }       
      var pickParagraph = function(lineSize) {
        var len =lines.length;
        var rnd = Math.floor(Math.random() * (len));
        var parLines = _.range(rnd,rnd+lineSize).map(function(ix){
          return lines[ix] 
        })
        var par = parLines.join('\n')
        return par
      }        
      return {
        pickOne:pickOne,
        pickYear:pickYear,
        pickMonth:pickMonth,
        pickDay:pickDay,
        pickHour:pickHour,
        pickMin:pickMin,
        
        pickWord:pickWord,
        pickWords:pickWords,
        pickLine:pickLine,
        pickParagraph:pickParagraph

      }
    }
    return {
      getInstance: function () {
        if ( !instance ) {
          instance = init();
      }
      return instance;
    }
  };
})();
module.exports = DataGenerator;