My latest attempt tries to handle if the "unlink" file is missing and uses a linkTopicsOnce setting:
(function($) {
$.fn.extend({
linktopics: function( settings ) {
var self = this;
this.settings = $.extend({}, $.linktopics.defaults,
settings);
this.topics = null;
this.trimTopics = function () {
for ( var i = 0; i < self.topics.length; i++ ) {
var allowed = true;
for ( var j = 0, numStopLinks =
self.stopLinks.length; j <
numStopLinks; j++ ) {
if ( self.stopLinks[j] ==
self.topics[i].topic ) {
allowed = false;
break;
}
}
if ( ! allowed ) {
void( self.topics.splice( i, 1
) );
}
}
};
this.setupRegexes = function () {
for ( var i = 0, numTopics =
self.topics.length; i < numTopics; i+
+ ) {
self.topics[i].linked = false;
self.topics[i].strings.sort(function(a,b) { // longer strings
come first
if ( a.length > b.length ) {
return -1;
} else if ( a.length < b.length
) {
return 1;
} else {
return 0;
}
});
self.topics[i].regexes = new
Array(self.topics[i].strings.length);
for ( var j = 0, numStrings =
self.topics[i].strings.length; j <
numStrings; j++ ) {
self.topics[i].regexes[j] = new
RegExp( "(^|\\W)(" +
self.topics[i].strings[j].replace( /([\[\]\(\)\.\*\$\^\?\+\\])/g, '\\
$1' ) + ")((?!\\w)(?![^<]*(?:>|<\\/a)))" );
}
}
};
this.linkHtml = function () {
self.each(function() {
for ( var i = 0, numTopics =
self.topics.length; i < numTopics; i+
+ ) {
if ( self.topics[i].linked ==
false ) {
for ( var j = 0,
numRegexes = self.topics[i].regexes.length; j
< numRegexes; j++ ) {
if (
$(this).html().search( self.topics[i].regexes[j] ) !=
-1 ) {
$(this).html( $
(this).html().replace( self.topics[i].regexes[j], '$1<a rel="topic"
title="Topic: ' + self.topics[i].topic + '" href="' +
self.topics[i].link + '">$2<\/a>$3' ) );
if (
self.settings.linkTopicsOnce ) {
self.topics[i].linked = true;
break;
}
}
}
}
}
});
};
$.getJSON( self.settings.topicLinkJsonUrl,
function(json) {
if ( typeof json.topics == "object" ) {
self.topics = json.topics;
self.stopLinks = new Array();
$.ajax({
type: "GET",
url:
self.settings.topicUnlinkJsonUrl,
dataType: "json",
success: function(json){
if ( typeof
json.stoplinks == "object" ) {
self.stopLinks
= json.stoplinks;
}
self.trimTopics();
self.setupRegexes();
self.linkHtml();
},
error: function(xhr,errType,e) {
self.setupRegexes();
self.linkHtml();
}
});
}
});
}
});
$.linktopics = {};
// define global defaults, editable by client
$.linktopics.defaults = {
topicLinkJsonUrl: "topics_link.json",
topicUnlinkJsonUrl: "topics_unlink.json",
linkTopicsOnce: true
};
})(jQuery);
