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/** 
* @version 1.4.5
* @license MIT
*/
(function (ng, undefined){
    'use strict';

ng.module('smart-table', []).run(['$templateCache', function ($templateCache) {
    $templateCache.put('template/smart-table/pagination.html',
        '<div class="pagination" ng-if="pages.length >= 2"><ul class="pagination">' +
        '<li ng-repeat="page in pages" ng-class="{active: page==currentPage}"><a ng-click="selectPage(page)">{{page}}</a></li>' +
        '</ul></div>');
}]);


ng.module('smart-table')
    .controller('stTableController', ['$scope', '$parse', '$filter', '$attrs', function StTableController($scope, $parse, $filter, $attrs) {
        var propertyName = $attrs.stTable;
        var displayGetter = $parse(propertyName);
        var displaySetter = displayGetter.assign;
        var safeGetter;
        var orderBy = $filter('orderBy');
        var filter = $filter('filter');
        var safeCopy = copyRefs(displayGetter($scope));
        var tableState = {
            sort: {},
            search: {},
            pagination: {
                start: 0
            }
        };
        var pipeAfterSafeCopy = true;
        var ctrl = this;
        var lastSelected;

        function copyRefs(src) {
            return [].concat(src);
        }

        function updateSafeCopy() {
            safeCopy = copyRefs(safeGetter($scope));
            if (pipeAfterSafeCopy === true) {
                ctrl.pipe();
            }
        }

        if ($attrs.stSafeSrc) {
            safeGetter = $parse($attrs.stSafeSrc);
            $scope.$watch(function () {
                var safeSrc = safeGetter($scope);
                return safeSrc ? safeSrc.length : 0;

            }, function (newValue, oldValue) {
                if (newValue !== safeCopy.length) {
                    updateSafeCopy();
                }
            });
            $scope.$watch(function () {
                return safeGetter($scope);
            }, function (newValue, oldValue) {
                if (newValue !== oldValue) {
                    updateSafeCopy();
                }
            });
        }

        /**
         * sort the rows
         * @param {Function | String} predicate - function or string which will be used as predicate for the sorting
         * @param [reverse] - if you want to reverse the order
         */
        this.sortBy = function sortBy(predicate, reverse) {
            tableState.sort.predicate = predicate;
            tableState.sort.reverse = reverse === true;
            tableState.pagination.start = 0;
            return this.pipe();
        };

        /**
         * search matching rows
         * @param {String} input - the input string
         * @param {String} [predicate] - the property name against you want to check the match, otherwise it will search on all properties
         */
        this.search = function search(input, predicate) {
            var predicateObject = tableState.search.predicateObject || {};
            var prop = predicate ? predicate : '$';
            predicateObject[prop] = input;
            // to avoid to filter out null value
            if (!input) {
                delete predicateObject[prop];
            }
            tableState.search.predicateObject = predicateObject;
            tableState.pagination.start = 0;
            return this.pipe();
        };

        /**
         * this will chain the operations of sorting and filtering based on the current table state (sort options, filtering, ect)
         */
        this.pipe = function pipe() {
            var pagination = tableState.pagination;
            var filtered = tableState.search.predicateObject ? filter(safeCopy, tableState.search.predicateObject) : safeCopy;
            if (tableState.sort.predicate) {
                filtered = orderBy(filtered, tableState.sort.predicate, tableState.sort.reverse);
            }
            if (pagination.number !== undefined) {
                pagination.numberOfPages = filtered.length > 0 ? Math.ceil(filtered.length / pagination.number) : 1;
                pagination.start = pagination.start >= filtered.length ? (pagination.numberOfPages - 1) * pagination.number : pagination.start;
                filtered = filtered.slice(pagination.start, pagination.start + pagination.number);
            }
            displaySetter($scope, filtered);
        };

        /**
         * select a dataRow (it will add the attribute isSelected to the row object)
         * @param {Object} row - the row to select
         * @param {String} [mode] - "single" or "multiple" (multiple by default)
         */
        this.select = function select(row, mode) {
            var rows = safeCopy;
            var index = rows.indexOf(row);
            if (index !== -1) {
                if (mode === 'single') {
                    row.isSelected = row.isSelected !== true;
                    if (lastSelected) {
                        lastSelected.isSelected = false;
                    }
                    lastSelected = row.isSelected === true ? row : undefined;
                } else {
                    rows[index].isSelected = !rows[index].isSelected;
                }
            }
        };

        /**
         * take a slice of the current sorted/filtered collection (pagination)
         *
         * @param {Number} start - start index of the slice
         * @param {Number} number - the number of item in the slice
         */
        this.slice = function splice(start, number) {
            tableState.pagination.start = start;
            tableState.pagination.number = number;
            return this.pipe();
        };

        /**
         * return the current state of the table
         * @returns {{sort: {}, search: {}, pagination: {start: number}}}
         */
        this.tableState = function getTableState() {
            return tableState;
        };

        /**
         * Use a different filter function than the angular FilterFilter
         * @param filterName the name under which the custom filter is registered
         */
        this.setFilterFunction = function setFilterFunction(filterName) {
            filter = $filter(filterName);
        };

        /**
         *User a different function than the angular orderBy
         * @param sortFunctionName the name under which the custom order function is registered
         */
        this.setSortFunction = function setSortFunction(sortFunctionName) {
            orderBy = $filter(sortFunctionName);
        };

        /**
         * Usually when the safe copy is updated the pipe function is called.
         * Calling this method will prevent it, which is something required when using a custom pipe function
         */
        this.preventPipeOnWatch = function preventPipe() {
            pipeAfterSafeCopy = false;
        };
    }])
    .directive('stTable', function () {
        return {
            restrict: 'A',
            controller: 'stTableController',
            link: function (scope, element, attr, ctrl) {

                if (attr.stSetFilter) {
                    ctrl.setFilterFunction(attr.stSetFilter);
                }

                if (attr.stSetSort) {
                    ctrl.setSortFunction(attr.stSetSort);
                }
            }
        };
    });

ng.module('smart-table')
    .directive('stSearch', ['$timeout', function ($timeout) {
        return {
            require: '^stTable',
            scope: {
                predicate: '=?stSearch'
            },
            link: function (scope, element, attr, ctrl) {
                var tableCtrl = ctrl;
                var promise = null;
                var throttle = attr.stDelay || 400;

                scope.$watch('predicate', function (newValue, oldValue) {
                    if (newValue !== oldValue) {
                        ctrl.tableState().search = {};
                        tableCtrl.search(element[0].value || '', newValue);
                    }
                });

                //table state -> view
                scope.$watch(function () {
                    return ctrl.tableState().search;
                }, function (newValue, oldValue) {
                    var predicateExpression = scope.predicate || '$';
                    if (newValue.predicateObject && newValue.predicateObject[predicateExpression] !== element[0].value) {
                        element[0].value = newValue.predicateObject[predicateExpression] || '';
                    }
                }, true);

                // view -> table state
                element.bind('input', function (evt) {
                    evt = evt.originalEvent || evt;
                    if (promise !== null) {
                        $timeout.cancel(promise);
                    }
                    promise = $timeout(function () {
                        tableCtrl.search(evt.target.value, scope.predicate || '');
                        promise = null;
                    }, throttle);
                });
            }
        };
    }]);

ng.module('smart-table')
    .directive('stSelectRow', function () {
        return {
            restrict: 'A',
            require: '^stTable',
            scope: {
                row: '=stSelectRow'
            },
            link: function (scope, element, attr, ctrl) {
                var mode = attr.stSelectMode || 'single';
                element.bind('click', function () {
                    scope.$apply(function () {
                        ctrl.select(scope.row, mode);
                    });
                });

                scope.$watch('row.isSelected', function (newValue, oldValue) {
                    if (newValue === true) {
                        element.addClass('st-selected');
                    } else {
                        element.removeClass('st-selected');
                    }
                });
            }
        };
    });

ng.module('smart-table')
    .directive('stSort', ['$parse', function ($parse) {
        return {
            restrict: 'A',
            require: '^stTable',
            link: function (scope, element, attr, ctrl) {

                var predicate = attr.stSort;
                var getter = $parse(predicate);
                var index = 0;
                var classAscent = attr.stClassAscent || 'st-sort-ascent';
                var classDescent = attr.stClassDescent || 'st-sort-descent';
                var stateClasses = [classAscent, classDescent];

                //view --> table state
                function sort() {
                    index++;
                    if (index % 3 === 0 && attr.stSkipNatural === undefined) {
                        //manual reset
                        index = 0;
                        ctrl.tableState().sort = {};
                        ctrl.tableState().pagination.start = 0;
                        ctrl.pipe();
                    } else {
                        ctrl.sortBy(predicate, index % 2 === 0);
                    }
                }

                if (ng.isFunction(getter(scope))) {
                    predicate = getter(scope);
                }

                element.bind('click', function sortClick() {
                    if (predicate) {
                        scope.$apply(sort);
                    }
                });

                if (attr.stSortDefault !== undefined) {
                    index = attr.stSortDefault === 'reverse' ? 1 : 0;
                    sort();
                }

                //table state --> view
                scope.$watch(function () {
                    return ctrl.tableState().sort;
                }, function (newValue) {
                    if (newValue.predicate !== predicate) {
                        index = 0;
                        element
                            .removeClass(classAscent)
                            .removeClass(classDescent);
                    } else {
                        index = newValue.reverse === true ? 2 : 1;
                        element
                            .removeClass(stateClasses[index % 2])
                            .addClass(stateClasses[index - 1]);
                    }
                }, true);
            }
        };
    }]);

ng.module('smart-table')
    .directive('stPagination', function () {
        return {
            restrict: 'EA',
            require: '^stTable',
            scope: {
                stItemsByPage: '=?',
                stDisplayedPages: '=?'
            },
            templateUrl: function(element, attrs) {
              if (attrs.stTemplate) {
                return attrs.stTemplate;
              }
              return 'template/smart-table/pagination.html';
            },
            link: function (scope, element, attrs, ctrl) {

                scope.stItemsByPage = scope.stItemsByPage ? +(scope.stItemsByPage) : 10;
                scope.stDisplayedPages = scope.stDisplayedPages ? +(scope.stDisplayedPages) : 5;

                scope.currentPage = 1;
                scope.pages = [];

                function redraw() {
                    var paginationState = ctrl.tableState().pagination;
                    var start = 1;
                    var end;
                    var i;
                    scope.currentPage = Math.floor(paginationState.start / paginationState.number) + 1;

                    start = Math.max(start, scope.currentPage - Math.abs(Math.floor(scope.stDisplayedPages / 2)));
                    end = start + scope.stDisplayedPages;

                    if (end > paginationState.numberOfPages) {
                        end = paginationState.numberOfPages + 1;
                        start = Math.max(1, end - scope.stDisplayedPages);
                    }

                    scope.pages = [];
                    scope.numPages = paginationState.numberOfPages;

                    for (i = start; i < end; i++) {
                        scope.pages.push(i);
                    }
                }

                //table state --> view
                scope.$watch(function () {
                    return ctrl.tableState().pagination;
                }, redraw, true);

                //scope --> table state  (--> view)
                scope.$watch('stItemsByPage', function () {
                    scope.selectPage(1);
                });

                scope.$watch('stDisplayedPages', redraw);

                //view -> table state
                scope.selectPage = function (page) {
                    if (page > 0 && page <= scope.numPages) {
                        ctrl.slice((page - 1) * scope.stItemsByPage, scope.stItemsByPage);
                    }
                };

                //select the first page
                ctrl.slice(0, scope.stItemsByPage);
            }
        };
    });

ng.module('smart-table')
    .directive('stPipe', function () {
        return {
            require: 'stTable',
            scope: {
                stPipe: '='
            },
            link: {
                pre: function (scope, element, attrs, ctrl) {

                    if (ng.isFunction(scope.stPipe)) {
                        ctrl.preventPipeOnWatch();
                        ctrl.pipe = function () {
                            return scope.stPipe(ctrl.tableState(), ctrl);
                        }
                    }
                }
            }
        };
    });

})(angular);