/**
    @module plugins/sourcetag
    @author Michael Mathews <micmath@gmail.com>
 */

/**
    Support @source tag. Expected value like:
        { "filename": "myfile.js", "lineno": 123 }
    Modifies the corresponding meta values on the given doclet.
 */
exports.newDoclet = function(e) {
    var tags = e.doclet.tags,
        tag,
        value;
        
    //console.log(e.doclet);
    // any user-defined tags in this doclet?  
    if (typeof tags !== 'undefined') {
        // only interested in the @source tags
        tags = tags.filter(function($) {
            return $.title === 'source';
        });
        
        if (tags.length) {
            // take the first one
            tag = tags[0];
            
            try {
                value = JSON.parse(tag.value);
            }
            catch(e) {
                throw new Error('@source tag expects a valid JSON value, like { "filename": "myfile.js", "lineno": 123 }.');
            }
            
            !e.doclet.meta && (e.doclet.meta = {});
            e.doclet.meta.filename = value.filename || '';
            e.doclet.meta.lineno = value.lineno || '';
        } 
    }
};