sheercms/lib/tags/tags-api.js

Sheer Cliff CMS is a simple and powerful content management system (CMS) for Node JS.

var logger = require('../logger');
var api = require('../api');
var util = require('../utilities');
var S = require('string');

var _tags = null;

/*
callback: (err, tags)
 */
module.exports.getAll = function(callback) {
    if (callback) {
        if (_tags == null) {
            api.sysdocs.getOne('tags', function(err, sysdoc) {
                if (err)
                    callback(err);
                else if (sysdoc) {
                    //data is an array of strings
                    if (sysdoc.data)
                        _tags = sysdoc.data;
                    else
                        _tags = [];
                    callback(null, _tags);
                }
                else {
                    var err = new Error("sysdoc not found: tags");
                    logger.error(err);
                    callback(err);
                }
            });
        }
        else {
            callback(null, _tags);
        }
    }
};

/*
callback: (err)
 */
module.exports.addTags = function(tags, callback) {

    //see if the tags are already in the list
    module.exports.getAll(function(err, list) {
        try {
            if (err) {
                if (callback) callback(err);
            }
            else {
                var updated = false;
                for (var i = 0; i < tags.length; i++) {
                    var found = false;
                    for (var j = 0; j < list.length; j++) {
                        if (tags[j] == list[i]) {
                            found = true;
                            break;
                        }
                    }
                    if (found == false) {
                        //add to the list
                        logger.info("Adding tag to tags list: " + tags[i]);
                        _tags.push(tags[i]);
                        updated = true;
                    }
                }

                if (updated) {
                    api.sysdocs.getOne('tags', function(err, doc) {
                        if (err) {
                            if (callback) callback(err);
                        }
                        else {
                            if (doc)
                                doc.data = _tags;
                            else
                                doc = { key: 'tags', data: _tags };

                            api.sysdocs.save(doc, function(err) {
                                if (callback) callback(err);
                            });
                        }
                    });
                }
                else {
                    if (callback) callback(null);
                }
            }
        }
        catch(e) {
            logger.error(e);
            if (callback) callback(e);
        }
    });
};