Custom dustjs helpers

dustjs-helper.js

// https://github.com/linkedin/dustjs-helpers
// https://github.com/rodw/common-dustjs-helpers

dust.helpers.slug = function (chunk, context, bodies, params) {
  //replace all special characters | symbols with a space
  params.value = params.value.replace(/[`~!@#$%^&*()_\-+=\[\]{};:'"\\|\/,.<>?\s]/g, ' ').toLowerCase();
  // trim spaces at start and end of string
  params.value = params.value.replace(/^\s+|\s+$/gm, '');
  // replace space with dash/hyphen
  params.value = params.value.replace(/\s+/g, '-');
  return chunk.write(params.value);
};

>> Usage

{
  "str":"Hello world"
}

{@slug value={str}/}

>> Output

hello-world

---------------------------------

dust.helpers.regexp = function(chunk, context, bodies, params) {
  var regexp = new RegExp(params.pattern, params.flag);
  if (regexp.test(params.term)) {
    return chunk.render(bodies.block, context);
  } else {
    return chunk.render(bodies['else'], context);
  }
}

>> Usage

{
  "notes":"Starts with 's'"
}

{@regexp term={notes} pattern="^[sS](\w+)" flag="g"}
  sample: {notes}
{:else}
  {notes}  
{/regexp}

>> Output

sample: Starts with 's'