mimouchat/cli/msgFormatter.js

/**
 * replace all :emoji: codes with corresponding image
 * @param {string} inputString
 * @return {string}
**/
function formatEmojis(inputString) {
    return inputString.replace(/:([^ \t:]+):/g, function(returnFailed, emoji) {
        var emojiDom = makeEmojiDom(emoji);
        if (emojiDom) {
            var domParent = document.createElement("span");
            domParent.className = returnFailed === inputString ? R.klass.emoji.medium : R.klass.emoji.small;
            domParent.appendChild(emojiDom);
            return domParent.outerHTML;
        }
        return returnFailed;
    });
}

/**
 * @param {string} fullText
 * @return {string}
**/
var formatText = (function() {
    return function (fullText) {
        if (!fullText || fullText == "")
            return "";
        var msgContents = fullText.split(/\r?\n/g);

        for (var msgContentIndex=0, nbMsgContents = msgContents.length; msgContentIndex < nbMsgContents; msgContentIndex++) {
            var msgContent = msgContents[msgContentIndex].trim()
                ,_msgContent = ""
                ,currentMods = {}
                ,quote = false
                ,i =0

            msgContent = msgContent.replace(new RegExp('<([@#]?)([^>]*)>', 'g'),
                function(matched, type, entity) {
                    var sub = entity.split('|');

                    if (type === '@') {
                        if (!sub[1]) {
                            var user = SLACK.context.users[sub[0]];
                            sub[1] = user ? ('@' +user.name) : locale.unknownMember;
                        } else if ('@' !== sub[1][0]) {
                            sub[1] = '@' +sub[1];
                        }
                        sub[0] = '#' +sub[0];
                        sub[2] = R.klass.msg.link +' ' +R.klass.msg.linkuser;
                    } else if (type === '#') {
                        if (!sub[1]) {
                            var chan = SLACK.context.channels[sub[0]];
                            sub[1] = chan ? ('#' +chan.name) : locale.unknownChannel;
                        } else if ('#' !== sub[1][0]) {
                            sub[1] = '#' +sub[1];
                        }
                        sub[0] = '#' +sub[0];
                        sub[2] = R.klass.msg.link +' ' +R.klass.msg.linkchan;
                    } else if (sub[0].indexOf("://") !== -1) {
                        if (!sub[1])
                            sub[1] = sub[0];
                        sub[2] = R.klass.msg.link;
                    } else {
                        return matched;
                    }
                    return '<a href="' +sub[0] +'" class="' +sub[2] +'"' +(!type ? ' target="_blank"' : '') +'>' +sub[1] +'</a>';
                });
            msgContent = formatEmojis(msgContent);
            var msgLength = msgContent.length;
            var isAlphadec = function(c) {
                return ((c >= 'A' && c <= 'Z') ||
                    (c >= 'a' && c <= 'z') ||
                    (c >= '0' && c <= '9') ||
                    "àèìòùÀÈÌÒÙáéíóúýÁÉÍÓÚÝâêîôûÂÊÎÔÛãñõÃÑÕäëïöüÿÄËÏÖÜŸçÇßØøÅåÆæœ".indexOf(c) !== -1);
            }
            ,checkEnd = function(str, pos, c) {
                while (str[pos]) {
                    if (isAlphadec(str[pos]) && str[pos] != c && str[pos +1] == c) {
                        return true;
                    }
                    pos++;
                }
                return false;
            } ,appendMod = function(mods) {
                if (!Object.keys(currentMods).length)
                    return "";
                return '<span class="' +Object.keys(mods).join(' ') +'">';
            };

            // Skip trailing
            while (i < msgLength && (msgContent[i] === ' ' || msgContent[i] === '\t'))
                i++;
            if (msgContent.substr(i, 4) === '&gt;') {
                quote = true;
                i += 4;
            }
            for (; i < msgLength; i++) {
                var c = msgContent[i];

                if (c === '<') {
                    do {
                        _msgContent += msgContent[i++];
                    } while (msgContent[i -1] !== '>' && msgContent[i]);
                    i--;
                    continue;
                }
                if (!(currentMods[R.klass.msg.style.bold]) && c === '*' && msgContent[i +1] && checkEnd(msgContent, i, c)) {
                    if (Object.keys(currentMods).length)
                        _msgContent += '</span>';
                    currentMods[R.klass.msg.style.bold] = true;
                    _msgContent += appendMod(currentMods);
                } else if (!(currentMods[R.klass.msg.style.strike]) && c === '~' && msgContent[i +1] && checkEnd(msgContent, i, c)) {
                    if (Object.keys(currentMods).length)
                        _msgContent += '</span>';
                    currentMods[R.klass.msg.style.strike] = true;
                    _msgContent += appendMod(currentMods);
                } else if (!(currentMods[R.klass.msg.style.code]) && c === '`' && msgContent[i +1] && checkEnd(msgContent, i, c)) {
                    if (Object.keys(currentMods).length)
                        _msgContent += '</span>';
                    currentMods[R.klass.msg.style.code] = true;
                    _msgContent += appendMod(currentMods);
                } else if (!(currentMods[R.klass.msg.style.italic]) && c === '_' && msgContent[i +1] && checkEnd(msgContent, i, c)) {
                    if (Object.keys(currentMods).length)
                        _msgContent += '</span>';
                    currentMods[R.klass.msg.style.italic] = true;
                    _msgContent += appendMod(currentMods);
                } else {
                    var finalFound = false;
                    _msgContent += c;

                    do {
                        if ((currentMods[R.klass.msg.style.bold]) && c !== '*' && msgContent[i +1] === '*') {
                            delete currentMods[R.klass.msg.style.bold];
                            finalFound = true;
                        } else if ((currentMods[R.klass.msg.style.strike]) && c !== '~' && msgContent[i +1] === '~') {
                            delete currentMods[R.klass.msg.style.strike];
                            finalFound = true;
                        } else if ((currentMods[R.klass.msg.style.code]) && c !== '`' && msgContent[i +1] === '`') {
                            delete currentMods[R.klass.msg.style.code];
                            finalFound = true;
                        } else if ((currentMods[R.klass.msg.style.italic]) && c !== '_' && msgContent[i +1] === '_') {
                            delete currentMods[R.klass.msg.style.italic];
                            finalFound = true;
                        } else {
                            break;
                        }
                        c = msgContent[++i];
                    } while (i < msgLength);
                    if (finalFound)
                        _msgContent += '</span>' +appendMod(currentMods);
                }
            }
            if (!isObjectEmpty(currentMods)) {
                // Should not append
                console.warn("formatter warning");
                _msgContent += '</span>';
            }
            if (quote)
                msgContents[msgContentIndex] = '<span class="' +R.klass.msg.style.quote +'">' +_msgContent +'</span>';
            else
                msgContents[msgContentIndex] = _msgContent;
        }
        return msgContents.length === 0 ? "" : msgContents.join('<br/>');
    }
})();