SGH / COMPONENTS

(function ($) {
  $(document).ready(function() {

    // Function to update labels of text fields
    Materialize.updateTextFields = function() {
      var input_selector = 'input[type=text], input[type=password], input[type=email], input[type=url], input[type=tel], input[type=number], input[type=search], textarea';
      $(input_selector).each(function(index, element) {
        if ($(element).val().length > 0 || $(this).attr('placeholder') !== undefined || $(element)[0].validity.badInput === true) {
          $(this).siblings('label').addClass('active');
        }
        else {
          $(this).siblings('label, i').removeClass('active');
        }
      });
    };

    // Text based inputs
    var input_selector = 'input[type=text], input[type=password], input[type=email], input[type=url], input[type=tel], input[type=number], input[type=search], textarea';

    // Handle HTML5 autofocus
    $('input[autofocus]').siblings('label, i').addClass('active');

    // Add active if form auto complete
    $(document).on('change', input_selector, function () {
      if($(this).val().length !== 0 || $(this).attr('placeholder') !== undefined) {
        $(this).siblings('label').addClass('active');
      }
      validate_field($(this));
    });

    // Add active if input element has been pre-populated on document ready
    $(document).ready(function() {
      Materialize.updateTextFields();
    });

    // HTML DOM FORM RESET handling
    $(document).on('reset', function(e) {
      var formReset = $(e.target);
      if (formReset.is('form')) {
        formReset.find(input_selector).removeClass('valid').removeClass('invalid');
        formReset.find(input_selector).each(function () {
          if ($(this).attr('value') === '') {
            $(this).siblings('label, i').removeClass('active');
          }
        });

        // Reset select
        formReset.find('select.initialized').each(function () {
          var reset_text = formReset.find('option[selected]').text();
          formReset.siblings('input.select-dropdown').val(reset_text);
        });
      }
    });

    // Add active when element has focus
    $(document).on('focus', input_selector, function () {
      $(this).siblings('label, i').addClass('active');
    });

    $(document).on('blur', input_selector, function () {
      var $inputElement = $(this);
      if ($inputElement.val().length === 0 && $inputElement[0].validity.badInput !== true && $inputElement.attr('placeholder') === undefined) {
        $inputElement.siblings('label, i').removeClass('active');
      }

      if ($inputElement.val().length === 0 && $inputElement[0].validity.badInput !== true && $inputElement.attr('placeholder') !== undefined) {
        $inputElement.siblings('i').removeClass('active');
      }
      validate_field($inputElement);
    });

    window.validate_field = function(object) {
      var hasLength = object.attr('length') !== undefined;
      var lenAttr = parseInt(object.attr('length'));
      var len = object.val().length;

      if (object.val().length === 0 && object[0].validity.badInput === false) {
        if (object.hasClass('validate')) {
          object.removeClass('valid');
          object.removeClass('invalid');
        }
      }
      else {
        if (object.hasClass('validate')) {
          // Check for character counter attributes
          if ((object.is(':valid') && hasLength && (len <= lenAttr)) || (object.is(':valid') && !hasLength)) {
            object.removeClass('invalid');
            object.addClass('valid');
          }
          else {
            object.removeClass('valid');
            object.addClass('invalid');
          }
        }
      }
    };


    // Textarea Auto Resize
    var hiddenDiv = $('.hiddendiv').first();
    if (!hiddenDiv.length) {
      hiddenDiv = $('<div class="hiddendiv common"></div>');
      $('body').append(hiddenDiv);
    }
    var text_area_selector = '.materialize-textarea';

    function textareaAutoResize($textarea) {
      // Set font properties of hiddenDiv

      var fontFamily = $textarea.css('font-family');
      var fontSize = $textarea.css('font-size');

      if (fontSize) { hiddenDiv.css('font-size', fontSize); }
      if (fontFamily) { hiddenDiv.css('font-family', fontFamily); }

      if ($textarea.attr('wrap') === "off") {
        hiddenDiv.css('overflow-wrap', "normal")
                 .css('white-space', "pre");
      }




      hiddenDiv.text($textarea.val() + '\n');
      var content = hiddenDiv.html().replace(/\n/g, '<br>');
      hiddenDiv.html(content);


      // When textarea is hidden, width goes crazy.
      // Approximate with half of window size

      if ($textarea.is(':visible')) {
        hiddenDiv.css('width', $textarea.width());
      }
      else {
        hiddenDiv.css('width', $(window).width()/2);
      }

      $textarea.css('height', hiddenDiv.height());
    }

    $(text_area_selector).each(function () {
      var $textarea = $(this);
      if ($textarea.val().length) {
        textareaAutoResize($textarea);
      }
    });

    $('body').on('keyup keydown autoresize', text_area_selector, function () {
      textareaAutoResize($(this));
    });


    // File Input Path

    $(document).on('change', '.file-field input[type="file"]', function () {
      var file_field = $(this).closest('.file-field');
      var path_input = file_field.find('input.file-path');
      var files      = $(this)[0].files;
      var file_names = [];
      for (var i = 0; i < files.length; i++) {
        file_names.push(files[i].name);
      }
      path_input.val(file_names.join(", "));
      path_input.trigger('change');
    });


    /****************
    *  Range Input  *
    ****************/

    var range_type = 'input[type=range]';
    var range_mousedown = false;
    var left;

    $(range_type).each(function () {
      var thumb = $('<span class="thumb"><span class="value"></span></span>');
      $(this).after(thumb);
    });

    var range_wrapper = '.range-field';
    $(document).on('change', range_type, function(e) {
      var thumb = $(this).siblings('.thumb');
      thumb.find('.value').html($(this).val());
    });

    $(document).on('input mousedown touchstart', range_type, function(e) {
      var thumb = $(this).siblings('.thumb');

      // If thumb indicator does not exist yet, create it
      if (thumb.length <= 0) {
        thumb = $('<span class="thumb"><span class="value"></span></span>');
        $(this).append(thumb);
      }

      // Set indicator value
      thumb.find('.value').html($(this).val());

      range_mousedown = true;
      $(this).addClass('active');

      if (!thumb.hasClass('active')) {
        thumb.velocity({ height: "30px", width: "30px", top: "-20px", marginLeft: "-15px"}, { duration: 300, easing: 'easeOutExpo' });
      }

      if(e.pageX === undefined || e.pageX === null){//mobile
         left = e.originalEvent.touches[0].pageX - $(this).offset().left;
      }
      else{ // desktop
         left = e.pageX - $(this).offset().left;
      }
      var width = $(this).outerWidth();

      if (left < 0) {
        left = 0;
      }
      else if (left > width) {
        left = width;
      }
      thumb.addClass('active').css('left', left);
      thumb.find('.value').html($(this).val());


    });

    $(document).on('mouseup touchend', range_wrapper, function() {
      range_mousedown = false;
      $(this).removeClass('active');
    });

    $(document).on('mousemove touchmove', range_wrapper, function(e) {
      var thumb = $(this).children('.thumb');
      var left;
      if (range_mousedown) {
        if (!thumb.hasClass('active')) {
          thumb.velocity({ height: '30px', width: '30px', top: '-20px', marginLeft: '-15px'}, { duration: 300, easing: 'easeOutExpo' });
        }
        if (e.pageX === undefined || e.pageX === null) { //mobile
          left = e.originalEvent.touches[0].pageX - $(this).offset().left;
        }
        else{ // desktop
          left = e.pageX - $(this).offset().left;
        }
        var width = $(this).outerWidth();

        if (left < 0) {
          left = 0;
        }
        else if (left > width) {
          left = width;
        }
        thumb.addClass('active').css('left', left);
        thumb.find('.value').html(thumb.siblings(range_type).val());
      }
    });

    $(document).on('mouseout touchleave', range_wrapper, function() {
      if (!range_mousedown) {

        var thumb = $(this).children('.thumb');

        if (thumb.hasClass('active')) {
          thumb.velocity({ height: '0', width: '0', top: '10px', marginLeft: '-6px'}, { duration: 100 });
        }
        thumb.removeClass('active');
      }
    });

  }); // End of $(document).ready




  // Select Plugin
  $.fn.material_select = function (callback) {
    $(this).each(function(){
      $select = $(this);

      if ( $select.hasClass('browser-default')) {
        return; // Continue to next (return false breaks out of entire loop)
      }

      // Tear down structure if Select needs to be rebuilt
      var lastID = $select.data('select-id');
      if (lastID) {
        $select.parent().find('span.caret').remove();
        $select.parent().find('input').remove();

        $select.unwrap();
        $('ul#select-options-'+lastID).remove();
      }

      // If destroying the select, remove the selelct-id and reset it to it's uninitialized state.
      if(callback === 'destroy') {
          $select.data('select-id', null).removeClass('initialized');
          return;
      }

      var uniqueID = Materialize.guid();
      $select.data('select-id', uniqueID);
      var wrapper = $('<div class="select-wrapper"></div>');
      wrapper.addClass($select.attr('class'));
      var options = $('<ul id="select-options-' + uniqueID+'" class="dropdown-content select-dropdown"></ul>');
      var selectOptions = $select.children('option');

      var label;
      if ($select.find('option:selected') !== undefined) {
        label = $select.find('option:selected');
      }
      else {
        label = options.first();
      }


      // Create Dropdown structure
      selectOptions.each(function () {
        // Add disabled attr if disabled
        options.append($('<li class="' + (($(this).is(':disabled')) ? 'disabled' : '') + '"><span>' + $(this).html() + '</span></li>'));
      });


      options.find('li').each(function (i) {
        var $curr_select = $select;
        $(this).click(function () {
          // Check if option element is disabled
          if (!$(this).hasClass('disabled')) {
            $curr_select.find('option').eq(i).prop('selected', true);
            // Trigger onchange() event
            $curr_select.trigger('change');
            $curr_select.siblings('input.select-dropdown').val($(this).text());
            if (typeof callback !== 'undefined') callback();
          }
        });

      });

      // Wrap Elements
      $select.wrap(wrapper);
      // Add Select Display Element
      var dropdownIcon = $('<span class="caret">&#9660;</span>');
      if ( $select.is(':disabled') )
        dropdownIcon.addClass('disabled');

      // escape double quotes
      var sanitizedLabelHtml = label.html().replace(/"/g, '&quot;');

      var $newSelect = $('<input type="text" class="select-dropdown" readonly="true" ' + (($select.is(':disabled')) ? 'disabled' : '') + ' data-activates="select-options-' + uniqueID +'" value="'+ sanitizedLabelHtml +'"/>');
      $select.before($newSelect);
      $newSelect.before(dropdownIcon);

      $('body').append(options);
      // Check if section element is disabled
      if (!$select.is(':disabled')) {
        $newSelect.dropdown({"hover": false});
      }

      // Copy tabindex
      if ($select.attr('tabindex')) {
        $($newSelect[0]).attr('tabindex', $select.attr('tabindex'));
      }

      $select.addClass('initialized');

      $newSelect.on('focus', function(){
        $(this).trigger('open');
        label = $(this).val();
        selectedOption = options.find('li').filter(function() {
          return $(this).text().toLowerCase() === label.toLowerCase();
        })[0];
        activateOption(options, selectedOption);
      });

      $newSelect.on('blur', function(){
        $(this).trigger('close');
      });

      // Make option as selected and scroll to selected position
      activateOption = function(collection, newOption) {
        collection.find('li.active').removeClass('active');
        $(newOption).addClass('active');
        collection.scrollTo(newOption);
      };

      // Allow user to search by typing
      // this array is cleared after 1 second
      filterQuery = [];

      onKeyDown = function(event){
        // TAB - switch to another input
        if(event.which == 9){
          $newSelect.trigger('close');
          return;
        }

        // ARROW DOWN WHEN SELECT IS CLOSED - open select options
        if(event.which == 40 && !options.is(":visible")){
          $newSelect.trigger('open');
          return;
        }

        // ENTER WHEN SELECT IS CLOSED - submit form
        if(event.which == 13 && !options.is(":visible")){
          return;
        }

        event.preventDefault();

        // CASE WHEN USER TYPE LETTERS
        letter = String.fromCharCode(event.which).toLowerCase();
        var nonLetters = [9,13,27,38,40];
        if (letter && (nonLetters.indexOf(event.which) === -1)){
          filterQuery.push(letter);

          string = filterQuery.join("");

          newOption = options.find('li').filter(function() {
            return $(this).text().toLowerCase().indexOf(string) === 0;
          })[0];

          if(newOption){
            activateOption(options, newOption);
          }
        }

        // ENTER - select option and close when select options are opened
        if(event.which == 13){
          activeOption = options.find('li.active:not(.disabled)')[0];
          if(activeOption){
            $(activeOption).trigger('click');
            $newSelect.trigger('close');
          }
        }

        // ARROW DOWN - move to next not disabled option
        if(event.which == 40){
          newOption = options.find('li.active').next('li:not(.disabled)')[0];
          if(newOption){
            activateOption(options, newOption);
          }
        }

        // ESC - close options
        if(event.which == 27){
          $newSelect.trigger('close');
        }

        // ARROW UP - move to previous not disabled option
        if(event.which == 38){
          newOption = options.find('li.active').prev('li:not(.disabled)')[0];
          if(newOption){
            activateOption(options, newOption);
          }
        }

        // Automaticaly clean filter query so user can search again by starting letters
        setTimeout(function(){ filterQuery = []; }, 1000);
      };

      $newSelect.on('keydown', onKeyDown);
    });
  };

}( jQuery ));