g3n1us_helpers.js

A JS port of Laravel's helpers along with some other useful functions

ltrim: function(str, charlist) {
  charlist = !charlist ? ' \\s\u00A0' : (charlist + '')
    .replace(/([\[\]\(\)\.\?\/\*\{\}\+\$\^:])/g, '$1')

  var re = new RegExp('^[' + charlist + ']+', 'g')

  return (str + '')
    .replace(re, '')
},

rtrim: function(str, charlist) {
  charlist = !charlist ? ' \\s\u00A0' : (charlist + '')
  .replace(/([\[\]\(\)\.\?\/\*\{\}\+\$\^:])/g, '\\$1')

  var re = new RegExp('[' + charlist + ']+$', 'g')

  return (str + '').replace(re, '')
},

randid: function(){
  return 'ID' + Math.round(Math.random() * 100000);
},	

getArgs: function(func) {
  // First match everything inside the function argument parens.
  var args = func.toString().match(/function\s.*?\(([^)]*)\)/)[1];

  // Split the arguments string into an array comma delimited.
  return args.split(',').map(function(arg) {
    // Ensure no inline comments are parsed and trim the whitespace.
    return arg.replace(/\/\*.*\*\//, '').trim();
  }).filter(function(arg) {
    // Ensure no undefined values are added.
    return arg;
  });
},

filter_int: function(num){
  if(typeof num !== "string") return num;
  else if(isNaN( parseInt(num) )) return num;
  else return parseInt(num);
},

str_contains: function(haystack, needle){
  return haystack.indexOf(needle) !== -1;
},

str_slug: function(text){
  return text.toString().toLowerCase()
    .replace(/\s+/g, '-')           // Replace spaces with -
    .replace(/[^\w\-]+/g, '')       // Remove all non-word chars
    .replace(/\-\-+/g, '-')         // Replace multiple - with single -
    .replace(/^-+/, '')             // Trim - from start of text
    .replace(/-+$/, '');            // Trim - from end of text
  // Thanks @mathewbyrne: https://gist.github.com/mathewbyrne/1280286			
},

in_array: function(needle, haystack){
  return haystack.indexOf(needle) !== -1;
},

array_where: function(arr, callback){
  var first = null;
  arr.forEach(function(item){
    if(callback(item)) first = item;
  })
  return first;
},

str_rand: function(length){
  length = !length ? 5 : length;
    var text = "";
    var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

    for( var i=0; i < length; i++ )
        text += possible.charAt(Math.floor(Math.random() * possible.length));

    return text;
},

array_rand: function(arr){
  var len = arr.length;
  var i = Math.ceil((Math.random() * len)) - 1;
  return arr[i];
},

array_keys_by: function(key, array){
  var keys = [];
  array.forEach(function(item){
    keys.push(item[key]);
  });
  return keys;
},

array_filter: function(arr, callback){
  var filtered = [];
  arr.forEach(function(v,k){
    if(callback(v, arr)){
      filtered.push(v);
    };
  });
  return filtered;
},
array_diff: function(sharedkey, array1, array2){
  var array1keys = this.array_keys_by(sharedkey, array1);
  var array2keys = this.array_keys_by(sharedkey, array2);
  var resultingarray = [];
  array1.forEach(function(array1item){
    if(!g3n1us_helpers.in_array(array1item[sharedkey], array2keys)) resultingarray.push(array1item);
  });
  return resultingarray;
},

array_except: function(obj, excluded_keys){
  var newobj = {};
  for(key in obj){
    if(!g3n1us_helpers.in_array(key, excluded_keys)) newobj[key] = obj[key];
  }	
  return newobj;
},

array_only: function(obj, included_keys){
  var newobj = {};
  included_keys.forEach(function(item){
    newobj[item] = obj[item]
  });
  return newobj;
},

array_dot: function(obj){		
  var res = {};
  (function recurse(obj, current) {
    for(var key in obj) {
      var value = obj[key];
      var newKey = (current ? current + "." + key : key);  // joined key with dot
      if(value && typeof value === "object") {
      res[newKey] = value;
      recurse(value, newKey);  // it's a nested object, so do it again
      } else {
      res[newKey] = value;  // it's not an object, so set the property
      }
    }
  })(obj);
  return res; 		
},

is_array: function(possible_array){
  return typeof possible_array === "object" && typeof possible_array.length === "number";
},

array_pluck: function(obj, val){
  var results = [];
  for(var i in obj){
    var dotobj = g3n1us_helpers.array_dot(obj[i]);
    results.push(dotobj[val]);
  }
  return results;
},

ucwords: function(str) {
    return (str + '').replace(/^([a-z])|\s+([a-z])/g, function ($1) {
        return $1.toUpperCase();
    });
},

queryStringify: function(requestquery){
  var str = '?';
  for(key in requestquery) str += key + '=' + requestquery[key] + '&';
  if(str.substr(-1) == '&') str = str.slice(0, -1);
  return str;
},

merge_object: function(obj1,obj2){
    var obj3 = {};
    for (var attrname in obj1) { obj3[attrname] = obj1[attrname]; }
    for (var attrname in obj2) { obj3[attrname] = obj2[attrname]; }
    return obj3;
},

array_merge: function(obj1,obj2){
  return g3n1us_helpers.merge_object(obj1,obj2);
},
// next is similar to above, but returns the original object with the seconds objects properties applied to it.
array_apply: function(dbobj, values){
  for(valuekey in values) dbobj[valuekey] = values[valuekey];
  return dbobj;
},

objectify: function(keyby, arr){
  var obj = {};
  arr.forEach(function(val){
    obj[val[keyby]] = val;
  });
  return obj;
},

getMethods: function(obj){
    var res = [];
    for(var m in obj) {
        if(typeof obj[m] == "function") {
            res.push(m)
        }
    }
    return res;
},

array_last: function(arr){return arr[arr.length-1]},

getHash: function(key, separator){
  if(!separator) separator = '/';
    var hash = g3n1us_helpers.rtrim(g3n1us_helpers.ltrim(window.location.hash, '/'), '/');
    hash = g3n1us_helpers.rtrim(g3n1us_helpers.ltrim(hash, separator), separator);
    var args = hash.split(separator);
    var obj = {};
    args.forEach(function(val){
      var kv = val.split('=');
      if(kv.length != 2 || kv[0].length == 0 || kv[1].length == 0) {

      }
      else{
        obj[kv[0]] = g3n1us_helpers.filter_int( kv[1] );
      }
    });
    if(!key)
      return obj;
    else 
      return obj[key];		
},

setHash: function(obj, hashchange){
  var hasharray = [];
  if(!obj) obj = {};
  var initialobj = g3n1us_helpers.getHash();
  var ischanged = false;
  for(testkey in obj){
    if(obj[testkey] != initialobj[testkey]){
      ischanged = true;
      break;
    }
  }
  if(ischanged){
    obj = g3n1us_helpers.array_merge(initialobj,obj);

    for(key in obj){
      if(key && obj[key]){
        hasharray.push(key + '=' + obj[key]);
      }	
    }
    var hashstring = '/' + hasharray.join('/');
    if(hashchange)
      window.location.hash = hashstring;					
    else
      return hashstring;
  }
},

form2Object: function($form, appendedObj){
  var returnVal = {};
/*
  Object.defineProperty(returnVal, "length", { get: function () {
    var length = 0;
    for(var i in returnVal) length++;
    return length;			
  } });
*/

  $form.serializeArray().forEach(function(obj){
    returnVal[obj.name] = obj.value; 
  });
  if(appendedObj){
    for(k in appendedObj) returnVal[k] = appendedObj[k]; 
  }
  if($form.data('formdata')){
    var jsonExtra = $form.data('formdata');

    for(k in jsonExtra) returnVal[k] = jsonExtra[k]; 
  }
  var length = 0;
  for(var i in returnVal) length++;
  returnVal.length = length;
  return returnVal;		
},

ends_with: function(string, ending){
  var realending = string.slice(ending.length * -1);
  return ending == realending;
},

isset: function(variablename, obj){
  var findin = obj || window;
  return typeof findin[variablename] !== "undefined";
},

istrue: function(variablename, obj){
  var findin = obj || window;		
  return !(!g3n1us_helpers.isset(variablename) || !findin[variablename]);
},

array_unique: function(arr){
  var u = {}, a = [];
  for(var i = 0, l = arr.length; i < l; ++i){
    if(u.hasOwnProperty(arr[i])) {
       continue;
    }
    a.push(arr[i]);
    u[arr[i]] = 1;
  }
  return a;
},

mime: function(filename){
  var path = filename.toLowerCase();
  var mime = "text/html";
  if(g3n1us_helpers.ends_with(path, ".css")) mime = "text/css";
  else if(g3n1us_helpers.ends_with(path, ".less")) mime = "text/css";
  else if(g3n1us_helpers.ends_with(path, ".sass")) mime = "text/css";
  else if(g3n1us_helpers.ends_with(path, ".scss")) mime = "text/css";
  else if(g3n1us_helpers.ends_with(path, ".mp4")) mime = "video/mp4";
  else if(g3n1us_helpers.ends_with(path, ".mov")) mime = "video/quicktime";
  else if(g3n1us_helpers.ends_with(path, ".js")) mime = "application/javascript";
  else if(g3n1us_helpers.ends_with(path, ".pdf")) mime = "application/pdf";
  else if(g3n1us_helpers.ends_with(path, ".svg")) mime = "image/svg+xml";
  else if(g3n1us_helpers.ends_with(path, ".jpg")) mime = "image/jpeg";
  else if(g3n1us_helpers.ends_with(path, ".jpeg")) mime = "image/jpeg";
  else if(g3n1us_helpers.ends_with(path, ".png")) mime = "image/png";
  else if(g3n1us_helpers.ends_with(path, ".gif")) mime = "image/gif";
  else if(g3n1us_helpers.ends_with(path, ".ico")) mime = "image/vnd.microsoft.icon";
  else if(g3n1us_helpers.ends_with(path, ".json")) mime = "application/json";
  else if(g3n1us_helpers.ends_with(path, ".ttf")) mime = "application/x-font-truetype";
  else if(g3n1us_helpers.ends_with(path, ".woff")) mime = "application/font-woff";
  else if(g3n1us_helpers.ends_with(path, ".woff2")) mime = "application/font-woff2";
  else if(g3n1us_helpers.ends_with(path, ".otf")) mime = "application/x-font-opentype";
  else if(g3n1us_helpers.ends_with(path, ".eot")) mime = "application/vnd.ms-fontobject";
  else if(g3n1us_helpers.ends_with(path, ".md")) mime = "text/markdown; charset=UTF-8";
  else if(g3n1us_helpers.ends_with(path, ".swf")) mime = "application/x-shockwave-flash";
  else if(g3n1us_helpers.ends_with(path, ".php")) mime = "text/html";
  else if(g3n1us_helpers.ends_with(path, ".hbs")) mime = "text/x-handlebars-template";
  else if(g3n1us_helpers.ends_with(path, ".json")) mime = "application/json";
  return mime;
},

is_image: function(filename){
  return g3n1us_helpers.str_contains(g3n1us_helpers.mime(filename), 'image');
},