sentence_parser.js

SentenceParser =
{
    parseIntoLines: function(html)
    {
        var LINK_PLACEHOLDER = "%%link%%";
        var SPOILER_PLACEHOLDER = "%%spoiler%%";

        // Extract all the links, store them in links[] and replace the link with a %%link%% placeholder in the post 
        var link_regex = new RegExp(/<a.*? href=(\"|')(.*?)([\n|\r]*?)(\"|').*?>(.*?)([\n|\r]*?)<\/a>/igm);
        var links = html.match(link_regex);
        html = html.replace(link_regex, LINK_PLACEHOLDER);

        // Extract all the spoilers, store them in spoilers[] and replace the spoilers with a %%spoiler%% placeholder in the post 
        var spoiler_regex = new RegExp(/<span class="jt_spoiler" onclick="return doSpoiler\( event \);">(|.|\r|\n)*?<\/span>/i);
        var spoilers = html.match(spoiler_regex);
        html = html.replace(spoiler_regex, SPOILER_PLACEHOLDER);

        // remove the rest of the html from the post
        post = stripHtml(html);

        // match a sentence as: 
        // 1. anything (non-greedy)
        // 2. one or more punctuation (unless it is a . followed by a number, letter, another . or a ]), or the end of the line
        var sentence_regex = new RegExp(/.+?(!|\.(?!\w|\.|\])|\?|$)+/gm);

        var link_replace_regex = new RegExp(LINK_PLACEHOLDER, "i");
        var spoiler_replace_regex = new RegExp(SPOILER_PLACEHOLDER, "i");

        var sentences = new Array(); 

        // Get sentences from paragraphs
        var matches = post.match(sentence_regex);
        if (matches)
        {
            for (var j = 0; j < matches.length; j++)
            {
                var tmp = matches[j].trim();

                if (tmp.length > 0)
                {
                    // replace placeholders with items
                    // do spoilers first, because spoilers could contain links!
                    while (tmp.indexOf(SPOILER_PLACEHOLDER) >= 0 && spoilers && spoilers.length > 0)
                        tmp = tmp.replace(spoiler_replace_regex, spoilers.shift());

                    while (tmp.indexOf(LINK_PLACEHOLDER) >= 0 && links && links.length > 0)
                        tmp = tmp.replace(link_replace_regex, links.shift());
    
                    sentences.push(tmp);
                }
            }
        }

        return sentences; 

    }
}