MemriseForgiveTypos.user.js

// ==UserScript==
// @name           Memrise Forgive Typos
// @description    Makes Memrise more forgiving on typos
// @match          http://www.memrise.com/course/*/garden/*
// @match          http://www.memrise.com/garden/water/*
// @version        0.1.8
// @updateURL      https://userscripts.org/scripts/source/167003.meta.js
// @downloadURL    https://userscripts.org/scripts/source/167003.user.js
// @grant          none
// ==/UserScript==

var onLoad = function($) {
	// Set to true if you don't want lack of accents to register as typos
	// e.g. garcon acceptable answer for garçon
	var IGNORE_ACCENTS = false;

	var get_question = function() {
		return $('.qquestion')[0].childNodes[0].nodeValue.trim();
	};

	var things, thingusers;
	var get_things = function() {
		if (things === undefined) {
			things     = MEMRISE.garden.things;
			thingusers = MEMRISE.garden.thingusers._list;
		}
	};

	var get_thinguser = function(id) {
		return thingusers.filter(function(e) {
			return e.thing_id === id;
		})[0];
	};

	var get_thing_by_q = function(str) {
		get_things();

		for (var id in things) {
			var thing = things[id];
			var thinguser = get_thinguser(thing.id);
			if (thinguser) {
				// Get the 'question' for the current `thing` based on the
				// column_b from `thinguser` for this particular `thing.
				// Compare the `question` with the given question str and if
				// they match, we can pick the current `thing`.
				//
				// Sometimes the 'question' seems to have trailing
				// whitespace, perhaps because they are written by users who
				// may accidentally put spaces in the end
				var question = thing.columns[thinguser.column_b].val;
        var alts     = thing.columns[thinguser.column_a].alts;  //sometimes the array is full of strings, sometimes objects {id:1, val:"foo"}
        for (i in alts) alts[i] = (typeof(alts[i])=="string") ? alts[i].replace("_","") : alts[i].val.replace("_","");
        
				if ($.trim(question) === $.trim(str)) {
        console.log(thing.columns[thinguser.column_a].val+" plus "+thing.columns[thinguser.column_a].accepted.length+" & "+alts.length);
					return {
						question  : question,
						answer    : thing.columns[thinguser.column_a].val,
            acceptable:[thing.columns[thinguser.column_a].val].concat( thing.columns[thinguser.column_a].accepted , alts )
					};
				}
			}
		}
	};

	var levenshtein = MEMRISE.garden.scoring.levenshtein;

	var compare = function(a, b) {
		a = $.trim(a.toLowerCase());
		b = $.trim(b.toLowerCase());

		if (IGNORE_ACCENTS) {
			a = removeDiacritics(a);
			b = removeDiacritics(b);
		}

		return levenshtein(a, b).distance;
	};

	var LSget = function(key) {
		var value = localStorage[key];
		if (value === null || value === undefined) {
			return undefined;
		}
		try { return JSON.parse(value); } catch (e) { return null; }
	};
  
  var skipAlertDueToChineseTones = function(given, correct) {
    // Return true if typo check should be skipped
    var TONE_REGEX = /(\d)\b/g;
    var tones = function(str) {
      return str.match(TONE_REGEX);
    };

    var correctTones = tones(correct);
    if (correctTones) {
      if (LSget('forgive-typos-pinyin-disable') === true) {
        return true;
      }

      var givenTones = tones(given);
      if (givenTones.join() !== correctTones.join()) {
        // If tones don't match; skip typo check, i.e. typo check
        // should only apply for the pinyin
        return true;
      }
    }

    return false;
  };
  
  var skipAlertDueToFrenchArticles = function(given, correct) {
    var ARTICLES = [ 'le', 'la', 'les', 'un', 'une', 'des' ];
    var regex    = new RegExp('\\b(' + ARTICLES.join('|') + ')\\b', 'gi');
    var article  = function(str) {
      var m = str.match(regex);
      return m && m[0];
    };

    var givenArticle   = article(given);
    var correctArticle = article(correct);
    if (correctArticle && correctArticle !== givenArticle) {
      return true;
    }

    return false;
  };

  var prev_q;
  var check_answers = function(input) {
  var q = get_question();
  if (q === prev_q) {
    // Skip typo check the on second time regardless of given answer
    return true;
  }

    var given    = $(input).val();
    //var correct  = get_thing_by_q(q).answer;
    var acceptable = get_thing_by_q(q).acceptable;
    var category = MEMRISE.garden.session.category.name;

    console.log(acceptable.length+" options: "+acceptable);
    var bestDist = 100;
    var bestDistAnswer = "";
    for (i in acceptable) {
      var correct = acceptable[i];

      var nextDist = compare(given, correct);
      if (bestDist == 0) return true;         //If given perfectly matches one of the alternatives
      if (nextDist<bestDist) {
        bestDist = nextDist;                  //Keep track of the smallest Levenshtein distance 
        bestDistAnswer = correct;
      }
      prev_q = q;
      
    }  //for loop that chooses a new value for correct

    switch (category) {
      case 'Chinese': if (skipAlertDueToChineseTones(  given, correct)) return true; break;
      case 'French' : if (skipAlertDueToFrenchArticles(given, correct)) return true; break;
    }
    if (bestDist > 0 && bestDist <= 2) return false;  //Do not skip the warning popup
		return true;                                      //Do skip the warning popup
	};

  
	var handle_config = function(input) {
		var given = $(input).val();
		var has = function(str) {
			return given.indexOf(str) > -1;
		};

		if (!has('forgive-typos')) {
			return false;
		}

		if (has('pinyin')) {
			localStorage['forgive-typos-pinyin-disable'] = has('disable');
		}

		$(input).val('');
		return true;
	};

	var setup = function() {
		var handlers = [];
		var keydowns = $._data($('body').get(0), 'events').keydown;

		for (var i = keydowns.length - 1; i >= 0; i--){
			handlers.push(keydowns[i]);
		}

		var trigger = function(event) {
			if ($(event.target).is('textarea'))
				return;

			for (var i = handlers.length - 1; i >= 0; i--) {
				handlers[i].handler(event);
			}
		};

		$('body').off('keydown');
		$('body').on('keydown', function(e) {
			//try {
				var copytyping = $('.garden-box').hasClass('copytyping');
				if (!copytyping && $(e.target).is('input') && e.which === 13) {
					if (handle_config(e.target)) return;
					if (!check_answers(e.target)) {
            console.log("Show alert");
						return alert('Close, did you make a typo? Try again.');
					}
				}

				trigger(e);
			} catch (err) {
				console.log('error - falling back to default behavior', err);
				trigger(e);
			}
      
		});
	};

	var ready = function(f) {
		$._data($('body').get(0), 'events') ? f() : setTimeout(ready, 9, f);
	};

	ready(setup);
};

var injectWithJQ = function(f) {
	var script = document.createElement('script');
	script.textContent = '$(' + f.toString() + '($));';
	document.body.appendChild(script);
};

var inject = function(f) {
	var script = document.createElement('script');
	script.textContent = '(' + f.toString() + ')();';
	document.body.appendChild(script);
};

inject(removeDiacritics);
injectWithJQ(onLoad);

function removeDiacritics(){window.removeDiacritics=(function(){var 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etters:/[\u0069\u24D8\uFF49\u00EC\u00ED\u00EE\u0129\u012B\u012D\u00EF\u1E2F\u1EC9\u01D0\u0209\u020B\u1ECB\u012F\u1E2D\u0268\u0131]/g},{base:"j",letters:/[\u006A\u24D9\uFF4A\u0135\u01F0\u0249]/g},{base:"k",letters:/[\u006B\u24DA\uFF4B\u1E31\u01E9\u1E33\u0137\u1E35\u0199\u2C6A\uA741\uA743\uA745\uA7A3]/g},{base:"l",letters:/[\u006C\u24DB\uFF4C\u0140\u013A\u013E\u1E37\u1E39\u013C\u1E3D\u1E3B\u017F\u0142\u019A\u026B\u2C61\uA749\uA781\uA747]/g},{base:"lj",letters:/[\u01C9]/g},{base:"m",letters:/[\u006D\u24DC\uFF4D\u1E3F\u1E41\u1E43\u0271\u026F]/g},{base:"n",letters:/[\u006E\u24DD\uFF4E\u01F9\u0144\u00F1\u1E45\u0148\u1E47\u0146\u1E4B\u1E49\u019E\u0272\u0149\uA791\uA7A5]/g},{base:"nj",letters:/[\u01CC]/g},{base:"o",letters:/[\u006F\u24DE\uFF4F\u00F2\u00F3\u00F4\u1ED3\u1ED1\u1ED7\u1ED5\u00F5\u1E4D\u022D\u1E4F\u014D\u1E51\u1E53\u014F\u022F\u0231\u00F6\u022B\u1ECF\u0151\u01D2\u020D\u020F\u01A1\u1EDD\u1EDB\u1EE1\u1EDF\u1EE3\u1ECD\u1ED9\u01EB\u01ED\u00F8\u01FF\u0254\uA74B\uA74D\u0275]/g},{base:"oi",letters:/[\u01A3]/g},{base:"ou",letters:/[\u0223]/g},{base:"oo",letters:/[\uA74F]/g},{base:"p",letters:/[\u0070\u24DF\uFF50\u1E55\u1E57\u01A5\u1D7D\uA751\uA753\uA755]/g},{base:"q",letters:/[\u0071\u24E0\uFF51\u024B\uA757\uA759]/g},{base:"r",letters:/[\u0072\u24E1\uFF52\u0155\u1E59\u0159\u0211\u0213\u1E5B\u1E5D\u0157\u1E5F\u024D\u027D\uA75B\uA7A7\uA783]/g},{base:"s",letters:/[\u0073\u24E2\uFF53\u00DF\u015B\u1E65\u015D\u1E61\u0161\u1E67\u1E63\u1E69\u0219\u015F\u023F\uA7A9\uA785\u1E9B]/g},{base:"t",letters:/[\u0074\u24E3\uFF54\u1E6B\u1E97\u0165\u1E6D\u021B\u0163\u1E71\u1E6F\u0167\u01AD\u0288\u2C66\uA787]/g},{base:"tz",letters:/[\uA729]/g},{base:"u",letters:/[\u0075\u24E4\uFF55\u00F9\u00FA\u00FB\u0169\u1E79\u016B\u1E7B\u016D\u00FC\u01DC\u01D8\u01D6\u01DA\u1EE7\u016F\u0171\u01D4\u0215\u0217\u01B0\u1EEB\u1EE9\u1EEF\u1EED\u1EF1\u1EE5\u1E73\u0173\u1E77\u1E75\u0289]/g},{base:"v",letters:/[\u0076\u24E5\uFF56\u1E7D\u1E7F\u028B\uA75F\u028C]/g},{base:"vy",letters:/[\uA761]/g},{base:"w",letters:/[\u0077\u24E6\uFF57\u1E81\u1E83\u0175\u1E87\u1E85\u1E98\u1E89\u2C73]/g},{base:"x",letters:/[\u0078\u24E7\uFF58\u1E8B\u1E8D]/g},{base:"y",letters:/[\u0079\u24E8\uFF59\u1EF3\u00FD\u0177\u1EF9\u0233\u1E8F\u00FF\u1EF7\u1E99\u1EF5\u01B4\u024F\u1EFF]/g},{base:"z",letters:/[\u007A\u24E9\uFF5A\u017A\u1E91\u017C\u017E\u1E93\u1E95\u01B6\u0225\u0240\u2C6C\uA763]/g}];var b;return function(d){if(!b){b=a}for(var c=0;c<b.length;c++){d=d.replace(b[c].letters,b[c].base)}return d}}())};