summernote-seo.js

/* https://github.com/DiemenDesign/summernote-seo */
(function (factory) {
  if (typeof define === 'function' && define.amd) {
    define(['jquery'],factory);
  } else if (typeof module === 'object' && module.exports) {
    module.exports = factory(require('jquery'));
  } else {
    factory(window.jQuery);
  }
}(function ($) {
  $.extend(true,$.summernote.lang, {
    'en-US': {
      seo: {
        tooltip: 'SEO',
        keyNot: 'Keywords Extracted, you should review them!!!',
        keyClipboard:' Keywords Extracted and placed into your Clipboard, paste them where you need them!!!',
        keyNotError: 'Something went wrong!!!',
        capNot: 'Caption has been Copied!!!',
        capClipboard: 'Caption Extracted and placed into your Clipboard, paste it where you need it!!!',
        capNotError: 'You haven\'t Selected Any Text for the Caption!!!',
        desNot: 'Description has been Copied!!!',
        desClipboard: 'Description Extracted and placed into your Clipboard, paste it where you need it!!!',
        desNotError: 'You haven\'t Selected Any Text for the Description!!!',
      }
    }
  });
  $.extend($.summernote.options, {
    seo: {
      el: '#summernote', // Element ID or Class used to Initialise Summernote.
      notTime: 2400, // Time to display Notifications.
      keyEl: '#seoKeywords', // ID or Class of the Target Element to place Keywords.
      capEl: '#seoCaption', // ID or Class of the Target Element to place Caption.
      desEl: '#seoDescription', // ID or Class of the Target Element to place Description.
      triggerInput: true, // Set this to True if like me you use AJAX to update single fields
      action: 'replace', // replace|append Replace or Append Content.
      successClass: 'alert alert-success',
      errorClass: 'alert alert-danger',
      autoClose: false, // Set to True to Auto Close Notifications
      icon: '<i class="note-icon"><svg xmlns="http://www.w3.org/2000/svg" id="libre-seo" viewBox="0 0 14 14" width="14" height="14"><path d="m 5.900978,8.5734763 c 0.57772,0 1.122935,0.12568 1.606781,0.34835 -0.377331,-0.42276 -0.96108,-0.6955 -1.618199,-0.6955 -0.666351,0 -1.257265,0.28066 -1.633576,0.71365 0.493486,-0.23377 1.052332,-0.3665 1.644994,-0.3665 z m 1.654664,-5.33156 c -0.899973,-0.89998 -2.353986,-0.89272 -3.254134,0.007 -0.899973,0.89992 -0.906148,2.35737 -0.0061,3.25714 l 1.6258,1.61694 1.629325,-1.62956 c 0.900031,-0.90006 0.905012,-2.35177 0.0052,-3.2517101 z m -1.62845,3.00577 c -0.765672,0 -1.386324,-0.62074 -1.386324,-1.38623 0,-0.7658201 0.620652,-1.38647 1.386324,-1.38647 0.765817,0 1.386498,0.62079 1.386498,1.38647 0,0.7653799 -0.620506,1.38623 -1.386498,1.38623 z m 3.482804,-3.80628 c -1.92114,-1.92163005 -5.047381,-1.92163005 -6.968813,0 -1.921577,1.9211399 -1.921577,5.0475299 0,6.96881 1.855519,1.8554897 4.834556,1.9186397 6.767084,0.19043 l 0.390671,0.39082 c -0.09728,0.2489997 -0.04628,0.5424197 0.154807,0.7435297 l 2.061471,2.06145 c 0.270991,0.27116 0.710564,0.27116 0.98141,0 0.271165,-0.27085 0.271165,-0.71031 0,-0.98159 L 10.735329,9.7538263 c -0.201262,-0.20141 -0.494797,-0.25238 -0.743827,-0.15496 l -0.39067,-0.39081 c 1.728528,-1.93241 1.6648,-4.91145 -0.190836,-6.76665 z m -6.379938,6.38008 c -1.596673,-1.59649 -1.596673,-4.19476 0,-5.7914401 1.596528,-1.59667 4.19471,-1.59667 5.791354,0 1.596674,1.59668 1.596674,4.1949201 0,5.7914401 -1.596644,1.5964997 -4.194826,1.5964997 -5.791354,0 z"/></svg></i> &nbsp;<span class="caret"></span>',
      menu: [
        'Extract Keywords',
        'Copy Caption',
        'Copy Description'
      ]
    }
  });
  $.extend($.summernote.plugins, {
    'seo': function (context) {
      var self      = this,
          ui        = $.summernote.ui,
          $note     = context.layoutInfo.note,
          $editor   = context.layoutInfo.editor,
          $editable = context.layoutInfo.editable,
          options   = context.options,
          lang      = options.langInfo;
      context.memo('button.seo', function () {
        var button = ui.buttonGroup([
          ui.button({
            className: 'dropdown-toggle',
            contents: options.seo.icon,
            tooltip: lang.seo.tooltip,
            data: {
              toggle: 'dropdown'
            }
          }),
          ui.dropdown({
            className: 'dropdown-template',
            items: options.seo.menu,
            click: function (e) {
              var $button = $(e.target);
              var value   = $button.data('value');
              e.preventDefault();
              switch (value) {
                case 'Copy Caption':
                  var text = $(options.seo.el).summernote('createRange');
                  text.toString();
                  if (text=='') {
                    var seoNotification = '<div class="summernote-seoAlert ' + options.seo.errorClass + '" style="position:absolute;top:' + e.pageX + ';left:' + e.pageY + ';">' + lang.seo.capNotError + (options.seo.autoClose ? '' : '&nbsp;&nbsp;&nbsp;&nbsp;<a class="close" data-dismiss="alert" href="#" aria-hidden="true" title="Close Alert">&times;</a>') + '</div>';
                  } else {
                    if ($(options.seo.keyEl).length) {
                      if ($(options.seo.capEl).is('input,textarea')) {
                        if (options.seo.action == 'replace') {
                          $(options.seo.capEl).val(text);
                        } else {
                          var preText = $(options.seo.capEl).val();
                          if (preText != '') preText += ', ';
                          $(options.seo.capEl).val(preText + text);
                        }
                        if (options.seo.triggerInput == true) $(options.seo.capEl).trigger("change");
                      } else {
                        if (options.seo.action == 'replace') {
                          $(options.seo.capEl).text(text);
                        } else {
                          var preText = $(options.seo.capEl).html();
                          $(options.seo.capEl).text(preText + text);
                        }
                      }
                      var seoNotification = '<div class="summernote-seoAlert ' + options.seo.successClass + '" style="position:absolute;top:' + e.pageX + ';left:' + e.pageY + ';">' + lang.seo.capNot + (options.seo.autoClose ? '' : '&nbsp;&nbsp;&nbsp;&nbsp;<a class="close" data-dismiss="alert" href="#" aria-hidden="true" title="Close Alert">&times;</a>') + '</div>';
                    } else {
                      var $seoTempEl = $('<input>');
                      $("body").append($seoTempEl);
                      $seoTempEl.val(text).select();
                      document.execCommand("copy");
                      $seoTempEl.remove();
                      var seoNotification = '<div class="summernote-seoAlert ' + options.seo.successClass + '" style="position:absolute;top:' + e.pageX + ';left:' + e.pageY + '">' + lang.seo.capClipboard + (options.seo.autoClose ? '' : '&nbsp;&nbsp;&nbsp;&nbsp;<a class="close" data-dismiss="alert" href="#" aria-hidden="true" title="Close Alert">&times;</a>') + '</div>';
                    }
                  }
                break;
                case 'Copy Description':
                  var text = $(options.seo.el).summernote('createRange');
                  text.toString();
                  if (text == '') {
                    var seoNotification = '<div class="summernote-seoAlert ' + options.seo.errorClass + '" style="position:absolute;top:' + e.pageX + ';left:' + e.pageY + ';">' + lang.seo.desNotError + (options.seo.autoClose ? '' : '&nbsp;&nbsp;&nbsp;&nbsp;<a class="close" data-dismiss="alert" href="#" aria-hidden="true" title="Close Alert">&times;</a>') + '</div>';
                  } else {
                    if ($(options.seo.desEl).length) {
                      if ($(options.seo.desEl).is('input')) {
                        if (options.seo.action == 'replace') {
                          $(options.seo.desEl).val(text);
                        } else {
                          var preText = $(options.seo.desEl).val();
                          if (preText != '') preText += ', ';
                          $(options.seo.desEl).val(preText + text);
                        }
                        if (options.seo.triggerInput == true) $(options.seo.desEl).trigger("change");
                      } else {
                        if (options.seo.action=='replace') {
                          $(options.seo.desEl).text(text);
                        } else {
                          var preText = $(options.seo.desEl).text();
                          $(options.seo.desEl).text(preText + text);
                        }
                      }
                      var seoNotification = '<div class="summernote-seoAlert ' + options.seo.successClass + '" style="position:absolute;top:' + e.pageX + ';left:' + e.pageY + '">' + lang.seo.desNot + (options.seo.autoClose ? '' : '&nbsp;&nbsp;&nbsp;&nbsp;<a class="close" data-dismiss="alert" href="#" aria-hidden="true" title="Close Alert">&times;</a>') + '</div>';
                    } else {
                      var $seoTempEl = $('<input>');
                      $("body").append($seoTempEl);
                      $seoTempEl.val(text).select();
                      document.execCommand("copy");
                      $seoTempEl.remove();
                      var seoNotification = '<div class="summernote-seoAlert ' + options.seo.successClass + '" style="position:absolute;top:' + e.pageX + ';left:' + e.pageY + '">' + lang.seo.desClipboard + (options.seo.autoClose ? '' : '&nbsp;&nbsp;&nbsp;&nbsp;<a class="close" data-dismiss="alert" href="#" aria-hidden="true" title="Close Alert">&times;</a>') + '</div>';
                    }
                  }
                break;
                case 'Extract Keywords':
                  var text = getKeywords($(options.seo.el).text());
                  if ($(options.seo.keyEl).length) {
                    if ($(options.seo.keyEl).is('input,textarea')) {
                      if (options.seo.action == 'replace') {
                        $(options.seo.keyEl).val(text);
                      } else {
                        var preText = $(options.seo.keyEl).val();
                        if (preText != '') preText += ',';
                        $(options.seo.keyEl).val(preText + ',' + text);
                      }
                      if (options.seo.triggerInput == true) $(options.seo.keyEl).trigger("change");
                    } else {
                      if (options.seo.action == 'replace') {
                        $(options.seo.keyEl).text(text);
                      } else {
                        var preText = $(options.seo.keyEl).html();
                        $(options.seo.keyEl).text(preText + ',' + text);
                      }
                    }
                    var seoNotification = '<div class="summernote-seoAlert ' + options.seo.successClass + '" style="position:absolute;top:' + e.pageX + ';left:' + e.pageY + ';">' + lang.seo.keyNot + (options.seo.autoClose ? '' : '&nbsp;&nbsp;&nbsp;&nbsp;<a class="close" data-dismiss="alert" href="#" aria-hidden="true" title="Close Alert">&times;</a>') + '</div>'
                  } else {
                    var $seoTempEl = $('<input>');
                    $("body").append($seoTempEl);
                    $seoTempEl.val(text).select();
                    document.execCommand("copy");
                    $seoTempEl.remove();
                    var seoNotification = '<div class="summernote-seoAlert ' + options.seo.successClass + '" style="position:absolute;top:' + e.pageX + ';left:' + e.pageY + '">' + lang.seo.keyClipboard + (options.seo.autoClose ? '' : '&nbsp;&nbsp;&nbsp;&nbsp;<a class="close" data-dismiss="alert" href="#" aria-hidden="true" title="Close Alert">&times;</a>') + '</div>';
                  }
                break;
              }
              $('.note-resizebar').append(seoNotification);
              if (options.seo.autoClose) {
                setTimeout( function () {
                  $('.summernote-seoAlert').remove();
                },options.seo.notTime);
              }
            }
          })
        ]);
        return button.render();
      });
    }
  });
}));
var soundex={
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  en:['A','a','B','b','V','v','G','g','D','d','E','e','E','e','ZH','zh','Z','z','I','i','I','i','K','k','L','l','M','m','N','n','O','o','P','p','R','r','S','s','T','t','U','u','F','f','H','h','C','c','CH','ch','SH','sh','SCH','sch','\'','\'','Y','y','\'','\'','E','e','YU','Yu','YA','ya'],
  accented:{
    'A': /[Aa\xaa\xc0-\xc5\xe0-\xe5\u0100-\u0105\u01cd\u01ce\u0200-\u0203\u0226\u0227\u1d2c\u1d43\u1e00\u1e01\u1e9a\u1ea0-\u1ea3\u2090\u2100\u2101\u213b\u249c\u24b6\u24d0\u3371-\u3374\u3380-\u3384\u3388\u3389\u33a9-\u33af\u33c2\u33ca\u33df\u33ff\uff21\uff41]/ig,
    'B': /[Bb\u1d2e\u1d47\u1e02-\u1e07\u212c\u249d\u24b7\u24d1\u3374\u3385-\u3387\u33c3\u33c8\u33d4\u33dd\uff22\uff42]/ig,
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    'D': /[Dd\u010e\u010f\u01c4-\u01c6\u01f1-\u01f3\u1d30\u1d48\u1e0a-\u1e13\u2145\u2146\u216e\u217e\u249f\u24b9\u24d3\u32cf\u3372\u3377-\u3379\u3397\u33ad-\u33af\u33c5\u33c8\uff24\uff44]/ig,
    'E': /[Ee\xc8-\xcb\xe8-\xeb\u0112-\u011b\u0204-\u0207\u0228\u0229\u1d31\u1d49\u1e18-\u1e1b\u1eb8-\u1ebd\u2091\u2121\u212f\u2130\u2147\u24a0\u24ba\u24d4\u3250\u32cd\u32ce\uff25\uff45]/ig,
    'F': /[Ff\u1da0\u1e1e\u1e1f\u2109\u2131\u213b\u24a1\u24bb\u24d5\u338a-\u338c\u3399\ufb00-\ufb04\uff26\uff46]/ig,
    'G': /[Gg\u011c-\u0123\u01e6\u01e7\u01f4\u01f5\u1d33\u1d4d\u1e20\u1e21\u210a\u24a2\u24bc\u24d6\u32cc\u32cd\u3387\u338d-\u338f\u3393\u33ac\u33c6\u33c9\u33d2\u33ff\uff27\uff47]/ig,
    'H': /[Hh\u0124\u0125\u021e\u021f\u02b0\u1d34\u1e22-\u1e2b\u1e96\u210b-\u210e\u24a3\u24bd\u24d7\u32cc\u3371\u3390-\u3394\u33ca\u33cb\u33d7\uff28\uff48]/ig,
    'I': /[Ii\xcc-\xcf\xec-\xef\u0128-\u0130\u0132\u0133\u01cf\u01d0\u0208-\u020b\u1d35\u1d62\u1e2c\u1e2d\u1ec8-\u1ecb\u2071\u2110\u2111\u2139\u2148\u2160-\u2163\u2165-\u2168\u216a\u216b\u2170-\u2173\u2175-\u2178\u217a\u217b\u24a4\u24be\u24d8\u337a\u33cc\u33d5\ufb01\ufb03\uff29\uff49]/ig,
    'J': /[Jj\u0132-\u0135\u01c7-\u01cc\u01f0\u02b2\u1d36\u2149\u24a5\u24bf\u24d9\u2c7c\uff2a\uff4a]/ig,
    'K': /[Kk\u0136\u0137\u01e8\u01e9\u1d37\u1d4f\u1e30-\u1e35\u212a\u24a6\u24c0\u24da\u3384\u3385\u3389\u338f\u3391\u3398\u339e\u33a2\u33a6\u33aa\u33b8\u33be\u33c0\u33c6\u33cd-\u33cf\uff2b\uff4b]/ig,
    'L': /[Ll\u0139-\u0140\u01c7-\u01c9\u02e1\u1d38\u1e36\u1e37\u1e3a-\u1e3d\u2112\u2113\u2121\u216c\u217c\u24a7\u24c1\u24db\u32cf\u3388\u3389\u33d0-\u33d3\u33d5\u33d6\u33ff\ufb02\ufb04\uff2c\uff4c]/ig,
    'M': /[Mm\u1d39\u1d50\u1e3e-\u1e43\u2120\u2122\u2133\u216f\u217f\u24a8\u24c2\u24dc\u3377-\u3379\u3383\u3386\u338e\u3392\u3396\u3399-\u33a8\u33ab\u33b3\u33b7\u33b9\u33bd\u33bf\u33c1\u33c2\u33ce\u33d0\u33d4-\u33d6\u33d8\u33d9\u33de\u33df\uff2d\uff4d]/ig,
    'N': /[Nn\xd1\xf1\u0143-\u0149\u01ca-\u01cc\u01f8\u01f9\u1d3a\u1e44-\u1e4b\u207f\u2115\u2116\u24a9\u24c3\u24dd\u3381\u338b\u339a\u33b1\u33b5\u33bb\u33cc\u33d1\uff2e\uff4e]/ig,
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    'U': /[Uu\xd9-\xdc\xf9-\xfc\u0168-\u0173\u01af\u01b0\u01d3\u01d4\u0214-\u0217\u1d41\u1d58\u1d64\u1e72-\u1e77\u1ee4-\u1ee7\u2106\u24b0\u24ca\u24e4\u3373\u337a\uff35\uff55]/ig,
    'V': /[Vv\u1d5b\u1d65\u1e7c-\u1e7f\u2163-\u2167\u2173-\u2177\u24b1\u24cb\u24e5\u2c7d\u32ce\u3375\u33b4-\u33b9\u33dc\u33de\uff36\uff56]/ig,
    'W': /[Ww\u0174\u0175\u02b7\u1d42\u1e80-\u1e89\u1e98\u24b2\u24cc\u24e6\u33ba-\u33bf\u33dd\uff37\uff57]/ig,
    'X': /[Xx\u02e3\u1e8a-\u1e8d\u2093\u213b\u2168-\u216b\u2178-\u217b\u24b3\u24cd\u24e7\u33d3\uff38\uff58]/ig,
    'Y': /[Yy\xdd\xfd\xff\u0176-\u0178\u0232\u0233\u02b8\u1e8e\u1e8f\u1e99\u1ef2-\u1ef9\u24b4\u24ce\u24e8\u33c9\uff39\uff59]/ig,
    'Z': /[Zz\u0179-\u017e\u01f1-\u01f3\u1dbb\u1e90-\u1e95\u2124\u2128\u24b5\u24cf\u24e9\u3390-\u3394\uff3a\uff5a]/ig},
  cache:{},
  word: function(str, iscyr) {
    var l        = str.length,
        output   = '',
        i        = 0,
        iscyr    = iscyr||true,
        previous = -1,
        power    = 6;
    while (i < l) {
      var current = last = this.codes[str[i]];
      for (var j = k = 1; k < power + 1; k++) {
        if (!str[i + k] || !current[str[i + k]]) break;
        current = current[str[i + k]];
        if (current[0]) {
          last = current;
          j = k + 1;
        }
      }
      var code;
      if (i == 0) {
        code = last[0][0];
      } else if (!str[i + j] || this.codes[str[i + j]][0][0] != 0) {
        code = iscyr ? (last.length > 1 ? last[1][2] : last[0][2]) : last[0][2];
      } else {
        code = iscyr ? (last.length > 1 ? last[1][1] : last[0][1]) : last[0][1];
      }
      if ((code != -1) && (code != previous)) output += code;
      previous = code;
      i += j;
    }
    if (output && output.length < 3) output += (new Array(3 - output.length + 1)).join('0');
    return output;
  },
  calc: function (str) {
    var str   = str.toUpperCase(),
        iscyr = false,
        trans = str.match(/[А-Я]/g);
    for (var letter in this.accented) {
      str.replace(this.accented[letter], letter);
    }
    if (trans) {
      str = this.translit(str, trans);
      iscyr = true;
    }
    str = str.replace(/[^\s^A-Z]/g, '').replace(/\s{2,}/g, ' ').replace(/^\s+|\s+$/g, '');
    if (!str) return null;
    var matches = str.split(' ');
    for (var i = 0, l = matches.length;i < l; i++) {
      var word = matches[i];
      if (this.cache[word]) {
        matches[i] = this.cache[word];
      } else {
        matches[i] = this.cache[word] = this.word(word,iscyr);
      }
    }
    matches = matches.toString().substr(0, 4);
    return matches;
  },
  translit: function (str,matches) {
    for (var i = 0, l = matches.length; i < l; i++) {
      var index = $.inArray(matches[i], this.ru);
      str = str.replace(matches[i], this.en[index]);
    }
    return str;
  }
};
function getKeywords (sourceText) {
  var start = Date.now();
	sourceText = sourceText.replace(/<style([\s\S]*?)\/style>/ig, " ");
	sourceText = sourceText.replace(/<script([\s\S]*?)\/script>/ig, " ");
	sourceText = sourceText.replace(/<\/?[a-z][a-z0-9]*[^<>]*>/ig, " ");
	sourceText = sourceText.replace(/&([\s\S]*?);/ig, " ");
	sourceText = sourceText.replace(/<!--([\s\S]*?)-->/ig, " ");
	sourceText = sourceText.replace(/[^a-zA-Zа-яА-Я\s]/g, " ");
	sourceText = sourceText.replace(/\s+/g, ' ');
	sourceText = sourceText.replace(/^\s+/, '');
	sourceText = sourceText.replace(/\s+$/, '');
	sourceText = sourceText.toLowerCase();
	var txt = sourceText.split(' ');
	var wordsArray = [];
	var finalArray = [];
	for (key in txt) {
		if (txt[key].length >= 5) {
			var SoundexNumber = soundex.calc(txt[key]);
			if (typeof wordsArray[SoundexNumber] != "undefined") {
				wordsArray[SoundexNumber].count++;
				if (wordsArray[SoundexNumber].string.indexOf(txt[key]) == -1 && wordsArray[SoundexNumber].word != txt[key]) {
					wordsArray[SoundexNumber].string.push(txt[key]);
				}
			} else {
				wordsArray[SoundexNumber] = {'word': txt[key], 'count': 1, 'string': []};
			}
		}
	}
	txt = '';
	for (key in wordsArray) {
		finalArray.push(wordsArray[key]);
	}
	finalArray.sort(function(obj1, obj2) {
		if (obj1.count == obj2.count) {return 0;}
		if (obj1.count > obj2.count) {return -1;} else {return 1;}
	});
	var keywords = '';
	for (key in finalArray) {
		if (keywords != '') keywords = keywords + ',';
		if ((keywords + finalArray[key].word).length > 255) break; else keywords=keywords+finalArray[key].word;
	}
	keywords = keywords.replace(/,+$/, '');
  var stop = Date.now();
	return keywords;
}