Colloquy Smart Linking Plugin

Smart Links.js

/*
 * Smart Linking Colloquy Plugin
 * By: Brent Shaffer
 * 
 * Add this plugin to one of the following directories and restart Colloquy:
 *   - ~/Library/Application Support/Colloquy/PlugIns
 *   - /Library/Application Support/Colloquy/PlugIns
 *   - /Network/Library/Application Support/Colloquy/PlugIns
 */

/* sample configuration.  Change below to match your desired linking pattern */
var linkConfig = [
    { 
        regex:    /issue #?(\d+)/i,
        regexAll: /issue #?(\d+)/ig,
        url:      'http://issues.mycorp.com/*/show',
    },
    { 
        regex:    /build #?(\d+)/i,
        regexAll: /build #?(\d+)/ig,
        url:      'https://builds.mycorp.com/info?build_id=*',
    },
];
var enabled = true;

function processUserCommand(command, arguments, connection, view) {
    if( command == 'smartlinks' ) {
        if( arguments == 'enable' || arguments == 'on' || arguments == 'yes' ) {
            view.addEventMessageToDisplay('Smart Links enabled.', 'smartLinksEnabled', null );
            enabled = true;
        } else if( arguments == 'disable' || arguments == 'off' || arguments == 'no' ) {
            view.addEventMessageToDisplay('Smart Links disabled.', 'smartLinksDisabled', null );
            enabled = false;
        } else if( arguments == 'reset' || arguments == 'clear' || arguments == 'forget' ) {
            view.addEventMessageToDisplay('Smart Links cache cleared.', 'smartLinksReset', null );
            titleCache = {};
        }

        return true;
    }

    return false;
}

function processIncomingMessage(message, view) {
    if( ! enabled ) return;

    html = message.bodyAsPlainText();

    for(var i=0; i<linkConfig.length; i++) {
        html = processLinkHtml(linkConfig[i], html);
    }
    
    if (html != message.bodyAsPlainText()) {
        message.setBodyAsHTML(html);
    }
}

function processLinkHtml(config, html) {
    if (links = html.match(config.regexAll)) {
        links.unique();
        links.sort( sortByStringLengthDescending );
        for(var i=0; i<links.length; i++) {
            if( matches = links[i].match(config.regex) ) {
                linkHtml = '<a href="'+config.url.replace('*', matches[1])+'">'+matches[0]+'</a>';
                html = html.replace(matches[0], linkHtml);
            }    
        }
    }
    
    return html;
}

function sortByStringLengthDescending ( a, b )
{
    if ( a.length > b.length )
        return -1;
    if ( a.length < b.length )
        return 1;
    return 0; // a and b are the same length
}

Array.prototype.unique = function() {    
    var o = {}, i, l = this.length, r = [];    
    for(i=0; i<l;i+=1) o[this[i]] = this[i];    
    for(i in o) r.push(o[i]);    
    return r;
};