promise chaining with $q

promiseChainingForCatalog.svc.js

(function() {
    'use strict';

    angular
        .module('alienadv.core')
        .factory('catalogService', catalogService);

    /* @ngInject */
    function catalogService($q) {
        var service = {
            getCatalogs: getCatalogs,
            catalogUrls: {
                SportsDifficulties: getDifficultyType,
                Seasons: getMonths,
                Hours: getHours,
                ActiityDays: getActivityDays,
                TypeOfRequirements: getTypeOfActiviyRequirements,
                Equipements: getAllEquipements,
                TypeOfTripInclusions: getTripInclusionTypes,
                Skills: getAllSkills,
                Countries: getAllCountries,
                Sports: getSports,
                TypeOfDocuments: getAllDocumentsType,
                TypeOfDiscounts: getAllDiscounts
            }
        };
        return service;

        function resolver(key, func) {
            var defer = $q.defer(), temp = {};
            func().then(function (res) {
                temp[key] = res;
                defer.resolve(temp);
            });
            return defer.promise;
        }

        function getCatalogs(req) {
            var allRequestChain = [];
            _.forEach(req, function(cName) {
                if (service.catalogUrls[cName]) {
                    allRequestChain.push(resolver(cName, service.catalogUrls[cName]));
                }
            });
            return $q.all(allRequestChain);
        }

        function getSports() {
            var defer = $q.defer();
            defer.resolve({
                0: 'Select a sport',
                2: 'Scuba Diving',
                3: 'Tekking',
                4: 'Offbeat',
                5: 'Paragliding',
                6: 'Rafting'
            });
            return defer.promise;
        }

        function getDifficultyType() {
            var defer = $q.defer();
            defer.resolve({
                0: 'Select activity dificulty',
                1: 'Easy',
                2: 'Medium',
                3: 'Hard'
            });
            return defer.promise;
        }

        function getMonths() {
            var defer = $q.defer();
            defer.resolve({
                1: 'January',
                2: 'Feburary',
                3: 'March',
                4: 'April',
                5: 'May',
                6: 'June',
                7: 'July',
                8: 'August',
                9: 'September',
                10: 'October',
                11: 'November',
                12: 'December'
            });
            return defer.promise;
        }

        function getHours() {
            var defer = $q.defer();
            defer.resolve({
                1: '1',
                2: '2',
                3: '3',
                4: '4',
                5: '5',
                6: '6',
                7: '7',
                8: '8',
                9: '9',
                10: '10',
                11: '11',
                12: '12',
                13: '13',
                14: '14',
                15: '15',
                16: '16',
                17: '17',
                18: '18',
                19: '19',
                20: '20',
                21: '21',
                22: '22',
                23: '23'
            });
            return defer.promise;
        }

        function getActivityDays() {
            var defer = $q.defer();
            defer.resolve({
                1: '1',
                2: '2',
                3: '3',
                4: '4',
                5: '5',
                6: '6',
                7: '7',
                8: '8',
                9: '9',
                10: '10',
                11: '11',
                12: '12',
                13: '13',
                14: '14',
                15: '15',
                16: '16',
                17: '17',
                18: '18',
                19: '19',
                20: '20'
            });
            return defer.promise();
        }

        function getTypeOfActiviyRequirements() {
            var defer = $q.defer();
            defer.resolve({
                0: 'Select',
                1: 'Equiments',
                2: 'Extra'
            });
            return defer.promise;
        }

        function getAllEquipements() {
            var defer = $q.defer();
            defer.resolve({
                0: 'Select',
                1: 'Wet Suits',
                2: 'Masks',
                3: 'BCD',
                4: 'Fins'
            });
            return defer.promise;
        }

        function getTripInclusionTypes() {
            var defer = $q.defer();
            defer.resolve({
                1: 'Accomodation',
                2: 'Transport',
                3: 'Safety',
                4: 'Meals'
            });
            return defer.promise;
        }

        function getAllSkills() {
            var defer = $q.defer();
            defer.resolve({
                0: 'Select',
                1: 'Open Water Driver'
            });
            return defer.promise;
        }

        function getAllCountries() {
            var defer = $q.defer();
            defer.resolve([{
                name: 'Afghanistan',
                code: 'AF'
            }, {
                name: 'Åland Islands',
                code: 'AX'
            }, {
                name: 'Albania',
                code: 'AL'
            }, {
                name: 'Algeria',
                code: 'DZ'
            }, {
                name: 'American Samoa',
                code: 'AS'
            }, {
                name: 'AndorrA',
                code: 'AD'
            }, {
                name: 'Angola',
                code: 'AO'
            }, {
                name: 'Anguilla',
                code: 'AI'
            }, {
                name: 'Antarctica',
                code: 'AQ'
            }, {
                name: 'Antigua and Barbuda',
                code: 'AG'
            }, {
                name: 'Argentina',
                code: 'AR'
            }, {
                name: 'Armenia',
                code: 'AM'
            }]);
            return defer.promise;
        }

        function getAllCities() {
            var defer = $q.defer();
            defer.resolve({
                0: 'Select City',
                1: 'Delhi',
                2: 'Bangalore'
            });
            return defer.promise;
        }

        function getAllRegions() {
            var defer = $q.defer();
            defer.resolve({
                0: 'Select Region',
                1: 'Koramangla',
                2: 'Indranagar'
            });
            return defer.promise;
        }

        function getAllDocumentsType() {
            var defer = $q.defer();
            defer.resolve({
                0: 'Select',
                1: 'Age Documnet',
                2: 'Driving License'
            });
            return defer.promise;
        }

        function getAllDiscounts() {
            var defer = $q.defer();
            defer.resolve({
                1: 'Age',
                2: 'Season',
                3: 'Group Size'
            });
            return defer.promise;
        }
    }
})();