smartTable2extjs_query_filter

// predicates filter to extjs query format
//usage put in html <input st-search="like['test.text']"> 
//then parse SmartTable's tableState var criteria = queryParserFilter(tableState);
myModule
    .filter('queryParser', function () {
        return function (tableState) {
            var criteria = {
                start: tableState.pagination.start,
                limit: tableState.pagination.number
            };
            if (tableState.sort.predicate) {
                criteria.sort = [{
                    property: tableState.sort.predicate,
                    direction: tableState.sort.reverse ? 'DESC' : 'ASC'
                }];
            } else {
                criteria.sort = [];
            }
            
            var predicates = tableState.search.predicateObject;
            //parse query, e.g. eq['content.id']='test'
            if (predicates) {
                criteria.filter = Object.keys(predicates).map(function (op) {
                    return Object.keys(predicates[op]).map(function (prop) {
                        var val = predicates[op][prop];
                        if ('like' == op) {
                            val = '%' + val + '%'
                        }
                        if (!prop || !op || !val) {
                            return undefined;
                        }
                        return {
                            property: prop,
                            operator: op,
                            value: val
                        };
                    });
                })[0].filter(function (element) {
                        return element;
                    });
            } else {
                criteria.filter = [];
            }
            return criteria;
        };
    });