forked from GitHub/dbot
some command correction shiz
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2ed6488d77
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@ -13,7 +13,27 @@ var command = function(dbot) {
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this.listener = function(event) {
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var commandName = event.params[0];
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if(!_.has(dbot.commands, commandName)) {
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if(_.has(dbot.modules, 'quotes')) {
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if(_.has(dbot.modules, 'spelling')) {
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var commands = _.keys(dbot.commands)
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winner = false,
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closestMatch = Infinity;
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_.each(commands, function(command) {
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var distance = dbot.api.spelling.distance(commandName, command);
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if(distance < closestMatch) {
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closestMatch = distance;
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winner = command;
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}
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});
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if(closestMatch < 3) {
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event.reply(commandName + ' not found. Did you mean ' + winner + '?');
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} else if(_.has(dbot.modules, 'quotes')) {
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commandName = '~';
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} else {
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return;
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}
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} else if(_.has(dbot.modules, 'quotes')) {
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commandName = '~';
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} else {
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return;
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@ -1,83 +1,87 @@
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var _ = require('underscore')._;
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var allGroupings = function(arr) {
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if (arr.length == 0) {
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return []; /* short-circuit the empty-array case */
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}
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var groupings = [];
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for(var n=1;n<=arr.length;n++) {
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for(var i=0;i<(arr.length-(n-1));i++) {
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groupings.push(arr.slice(i, i+n));
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}
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}
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return groupings;
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}
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var distance = function(s1, s2) {
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// Calculate Levenshtein distance between two strings
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//
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// version: 1109.2015
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// discuss at: http://phpjs.org/functions/levenshtein
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// + original by: Carlos R. L. Rodrigues (http://www.jsfromhell.com)
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// + bugfixed by: Onno Marsman
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// + revised by: Andrea Giammarchi (http://webreflection.blogspot.com)
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// + reimplemented by: Brett Zamir (http://brett-zamir.me)
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// + reimplemented by: Alexander M Beedie
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if (s1 == s2) {
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return 0;
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}
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var s1_len = s1.length;
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var s2_len = s2.length;
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if (s1_len === 0) {
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return s2_len; }
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if (s2_len === 0) {
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return s1_len;
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}
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// BEGIN STATIC
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var split = false;
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try {
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split = !('0')[0];
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} catch (e) {
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split = true; // Earlier IE may not support access by string index
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}
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// END STATIC
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if (split) {
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s1 = s1.split(''); s2 = s2.split('');
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}
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var v0 = new Array(s1_len + 1);
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var v1 = new Array(s1_len + 1);
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var s1_idx = 0,
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s2_idx = 0,
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cost = 0;
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for (s1_idx = 0; s1_idx < s1_len + 1; s1_idx++) { v0[s1_idx] = s1_idx;
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}
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var char_s1 = '',
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char_s2 = '';
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for (s2_idx = 1; s2_idx <= s2_len; s2_idx++) { v1[0] = s2_idx;
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char_s2 = s2[s2_idx - 1];
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for (s1_idx = 0; s1_idx < s1_len; s1_idx++) {
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char_s1 = s1[s1_idx]; cost = (char_s1 == char_s2) ? 0 : 1;
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var m_min = v0[s1_idx + 1] + 1;
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var b = v1[s1_idx] + 1;
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var c = v0[s1_idx] + cost;
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if (b < m_min) { m_min = b;
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}
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if (c < m_min) {
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m_min = c;
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} v1[s1_idx + 1] = m_min;
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}
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var v_tmp = v0;
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v0 = v1;
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v1 = v_tmp; }
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return v0[s1_len];
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};
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var spelling = function(dbot) {
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this.last = {};
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this.api = {
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'allGroupings': function(arr) {
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if (arr.length == 0) {
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return []; /* short-circuit the empty-array case */
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}
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var groupings = [];
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for(var n=1;n<=arr.length;n++) {
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for(var i=0;i<(arr.length-(n-1));i++) {
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groupings.push(arr.slice(i, i+n));
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}
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}
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return groupings;
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},
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'distance': function(s1, s2) {
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// Calculate Levenshtein distance between two strings
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//
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// version: 1109.2015
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// discuss at: http://phpjs.org/functions/levenshtein
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// + original by: Carlos R. L. Rodrigues (http://www.jsfromhell.com)
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// + bugfixed by: Onno Marsman
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// + revised by: Andrea Giammarchi (http://webreflection.blogspot.com)
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// + reimplemented by: Brett Zamir (http://brett-zamir.me)
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// + reimplemented by: Alexander M Beedie
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if (s1 == s2) {
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return 0;
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}
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var s1_len = s1.length;
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var s2_len = s2.length;
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if (s1_len === 0) {
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return s2_len; }
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if (s2_len === 0) {
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return s1_len;
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}
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// BEGIN STATIC
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var split = false;
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try {
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split = !('0')[0];
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} catch (e) {
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split = true; // Earlier IE may not support access by string index
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}
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// END STATIC
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if (split) {
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s1 = s1.split(''); s2 = s2.split('');
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}
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var v0 = new Array(s1_len + 1);
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var v1 = new Array(s1_len + 1);
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var s1_idx = 0,
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s2_idx = 0,
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cost = 0;
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for (s1_idx = 0; s1_idx < s1_len + 1; s1_idx++) { v0[s1_idx] = s1_idx;
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}
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var char_s1 = '',
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char_s2 = '';
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for (s2_idx = 1; s2_idx <= s2_len; s2_idx++) { v1[0] = s2_idx;
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char_s2 = s2[s2_idx - 1];
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for (s1_idx = 0; s1_idx < s1_len; s1_idx++) {
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char_s1 = s1[s1_idx]; cost = (char_s1 == char_s2) ? 0 : 1;
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var m_min = v0[s1_idx + 1] + 1;
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var b = v1[s1_idx] + 1;
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var c = v0[s1_idx] + cost;
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if (b < m_min) { m_min = b;
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}
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if (c < m_min) {
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m_min = c;
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} v1[s1_idx + 1] = m_min;
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}
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var v_tmp = v0;
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v0 = v1;
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v1 = v_tmp; }
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return v0[s1_len];
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}
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};
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this.internalAPI = {};
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this.internalAPI.correct = function (event, correction, candidate, output_callback) {
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var rawCandidates = allGroupings(this.last[event.channel.name][candidate].split(' '));
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var rawCandidates = this.api.allGroupings(this.last[event.channel.name][candidate].split(' '));
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var candidates = [];
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for(var i=0;i<rawCandidates.length;i++) {
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@ -87,7 +91,7 @@ var spelling = function(dbot) {
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var winnerDistance = Infinity;
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for(var i=0;i<candidates.length;i++) {
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var d = distance(correction.toLowerCase(), candidates[i].toLowerCase());
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var d = this.api.distance(correction.toLowerCase(), candidates[i].toLowerCase());
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if((d < winnerDistance) && (d > 0)) {
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winner = candidates[i];
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winnerDistance = d;
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