Handlebars Helpers

handlebras-helpers.js

// console
Handlebars.registerHelper("debug", function(optionalValue) {
    console.log("Current Context");
    console.log("====================");
    console.log(this);
       
    if (optionalValue) {
      console.log("Value");
      console.log("====================");
      console.log(optionalValue);
    }
  });

// remove accents
Handlebars.registerHelper("string_accents", function(values) {

  var map = { 'Í':'I', 'í':'i', 'Ã':'A', 'ã':'a'},
    nonWord = /\W/g,
    mapping = function (c) {
      return map[c] || c; 
    };

  return values.replace(nonWord, mapping).toLowerCase();

});

Handlebars.registerHelper('align', function(index) {
  return index % 2 === 0 ? '' : 'right';
});

// foreach
Handlebars.registerHelper("foreach", function (arr, options) {
  if (options.inverse && !arr.length) {
    return options.inverse(this);
  }
  return arr.map(function (item, index) {
    item.$index = index;
    item.$first = index === 0;
    item.$last  = index === arr.length - 1;
    return options.fn(item);
  }).join('');
});

Handlebars.registerHelper('ifCond', function (v1, operator, v2, options) {
  switch (operator) {
    case '==':
      return (v1 == v2) ? options.fn(this) : options.inverse(this);
    case '===':
      return (v1 === v2) ? options.fn(this) : options.inverse(this);
    case '<':
      return (v1 < v2) ? options.fn(this) : options.inverse(this);
    case '<=':
      return (v1 <= v2) ? options.fn(this) : options.inverse(this);
    case '>':
      return (v1 > v2) ? options.fn(this) : options.inverse(this);
    case '>=':
      return (v1 >= v2) ? options.fn(this) : options.inverse(this);
    case '&&':
      return (v1 && v2) ? options.fn(this) : options.inverse(this);
    case '||':
      return (v1 || v2) ? options.fn(this) : options.inverse(this);
    default:
      return options.inverse(this);
  }
});