utils.js

'use strict';

var _ = require('lodash');
var moment = require('moment');

/**
 * Extends source dictionaries into the target dictionary
 * @param  {Object}   target        Target to extend into
 * @param  {Objects}  sources       Sources to extend from
 * @return {Object}   Returns the target
 */
module.exports.extend = function(target) {
  var sources = [].slice.call(arguments, 1);
  sources.forEach(function (source) {
      for (var prop in source) {
          target[prop] = source[prop];
      }
  });
  return target;
};

/**
 * Slices a dictionary
 * @param  {Object}   dict        Object to slice
 * @param  {Integer}  limit       Number of items to return
 * @param  {Integer}  offset      Offset to slice to (From limit)
 * @return {Object}   Sliced dictionary
 */
module.exports.sliceDictionary = function(dict, limit, offset) {
  var keys = [];

  limit = limit || -1;
  offset = offset || -1;

  for(var key in dict)
  {
    if(dict.hasOwnProperty(key))
    {
      keys.push(key);
    }
  }

  if(limit !== -1 && offset !== -1)
  {
    keys = keys.slice(offset, offset + limit);
  } else if (limit !== -1) {
    keys = keys.slice(0, limit);
  } else if (offset !== -1) {
    keys = keys.slice(offset);
  } 

  var slicedDict = {};

  keys.forEach(function(key) {
    slicedDict[key] = dict[key];
  });

  return slicedDict;
};

module.exports.slice = function(data, limit, offset) {
  if(Array.isArray(data))
  {
    return data.slice(offset, limit + offset);
  } else {
    return this.sliceDictionary(data, limit, offset);
  }
};

module.exports.each = function(obj, cb) {
  _.each(obj, cb);
};

// Handle custom type path here
// Basically, if there is a custom path defined, throw out newPath and construct it from base
// newPath should be ./.build/<typename> so repace newPath.split('/')[2] with new thing

// Support dates in the url and the typename
// All refer to the publish date of the item
// #Y - Year Full
// #y - Year last two digits
// #m - Month number, leading zero
// #n - Month number, no leading zero
// #F - Month name full (january, october, etc)
// #M - Month short name (jan, oct, etc)
// #d - Day leading zero
// #j - Day, no leading zero
// #T - The typename (e.g. articles)
module.exports.parseCustomUrl = function(url, object) {
  var publishDate = object.publish_date ? object.publish_date : object;

   publishDate = moment(publishDate);

  function replacer(match, timeIdent, offset, string){
    if(timeIdent === 'Y') {
      return publishDate.format('YYYY').toLowerCase();
    } else if (timeIdent === 'y') {
      return publishDate.format('YY').toLowerCase();
    } else if (timeIdent === 'm') {
      return publishDate.format('MM').toLowerCase();
    } else if (timeIdent === 'n') {
      return publishDate.format('M').toLowerCase();
    } else if (timeIdent === 'F') {
      return publishDate.format('MMMM').toLowerCase();
    } else if (timeIdent === 'M') {
      return publishDate.format('MMM').toLowerCase();
    } else if (timeIdent === 'd') {
      return publishDate.format('DD').toLowerCase();
    } else if (timeIdent === 'j') {
      return publishDate.format('D').toLowerCase();
    } else if (timeIdent === 'T') {
      return object._type.toLowerCase();
    } else {
      return match;
    }
  }

  url = url.replace(/#(\w)/g, replacer);

  return url;
}