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springDataRestApi.js
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springDataRestApi.js
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(function() {
/**
* @author Vivek Yadav
*/
'use strict';
var springDataRestApiModule = angular.module('spring-data-rest-api', []);
var isDebug = false;
var DEBUG = function(val) {
if (isDebug) {
console.log("SpringDataRestApi : LOG : ");
console.log(val);
}
};
var ERROR = function(val) {
console.log("SpringDataRestApi : ERROR : ");
console.log(val);
};
var LOG = function(val) {
console.log("SpringDataRestApi : LOG : ");
console.log(val);
};
springDataRestApiModule
.provider(
"SpringDataRestApi",
function() {
var provider = {};
var config = {
baseApiUrl : '/api',
debug : false,
putResponseBody : false,
postResponseBody : false
};
var APIs = null;
provider.config = function(newConfig) {
if (newConfig) {
if (angular.isObject(newConfig)) {
if (newConfig.baseApiUrl) {
config.baseApiUrl = newConfig.baseApiUrl;
}
if (newConfig.debug) {
config.debug = newConfig.debug;
}
if(newConfig.putResponseBody){
config.putResponseBody = newConfig.putResponseBody;
}
if(newConfig.postResponseBody){
config.postResponseBody = newConfig.postResponseBody;
}
}
}
isDebug = config.debug;
return config;
};
provider.APIs = function(APIobj) {
if (APIobj) {
APIs = APIobj._links;
}
};
provider.$get = function($http,$q,$timeout) {
var service = {};
service.test = function() {
var deferred = $q.defer();
$timeout(function() {
deferred.resolve(['Hello', 'world!']);
}, 2000);
return deferred.promise;
};
service.init = function() {
var call = null;
var returnObj = {
then : function(callback) {
call = callback;
}
};
$http.get(config.baseApiUrl).then(
function(response) {
APIs = response.data._links;
if (call) {
call();
}
}.bind(this),
function(response) {
ERROR(response.status + ' : '
+ response.statusText);
}.bind(this));
return returnObj;
};
service.list = function(repository, links,
forceFetch, page, size, sort) {
var deferred = $q.defer();
if (!repository) {
ERROR('SpringDataRestApi.list(<type of repository>) : here type of repository cannot be null');
deferred.reject('SpringDataRestApi.list(<type of repository>) : here type of repository cannot be null');
}
if (!APIs) {
service.init();
}
if (!APIs[repository]) {
ERROR('Type of repository : ' + repository+ ' not found in the API');
deferred.reject('Type of repository : ' + repository+ ' not found in the API');
}
var reFetch = false;
if (forceFetch) {
reFetch = forceFetch;
}
if (!APIs[repository].list) {
APIs[repository].list = [];
reFetch = true;
}
if (reFetch) {
var fetchUrl = extractUrl(APIs[repository].href, (APIs[repository].templated)?(APIs[repository].templated):false);
if (page!=null) {
fetchUrl = fetchUrl + '?page=' + page;
if (size!=null) {
fetchUrl = fetchUrl + '&size='
+ size;
}
}
if (sort!=null && page==null) {
fetchUrl = fetchUrl + '?sort=' + sort;
} else if (sort!=null) {
fetchUrl = fetchUrl + '&sort=' + sort;
}
$http
.get(fetchUrl)
.then(
function(response) {
APIs[repository].list = response.data._embedded[repository];
if (links instanceof Array) {
if(links.length > 0){
var subLinks = fetchFirstLevelLinks(links);
angular.forEach(APIs[repository].list,function(item) {
angular.forEach(subLinks,function(subLink) {
if (item._links[subLink]) {
var newSubLinks = fetchSubLinksFor(links,subLink);
if(!item._ref){
item._ref = {};
}
item._ref[subLink] = {};
service.get(item._links[subLink].href,newSubLinks).then(function(response){
item._ref[subLink] = response;
});
} else {
ERROR("SubLink : "+ subLink+ " not found in "+ item._links.self.href);
deferred.reject("SubLink : "+ subLink+ " not found in "+ item._links.self.href);
}
},this);
},this);
deferred.resolve(APIs[repository].list);
}else{
deferred.resolve(APIs[repository].list);
}
}else{
deferred.resolve(APIs[repository].list);
}
}.bind(this),
function(response) {
ERROR('Href : '+fetchUrl+' : '+response.status+ ' : '+ response.statusText);
deferred.reject('Href : '+fetchUrl+' : '+response.status+ ' : '+ response.statusText);
}.bind(this));
}else{
deferred.resolve(APIs[repository].list);
}
return deferred.promise;
};
service.get = function(href, links,isWait) {
var deferred = $q.defer();
var result = new Object();
if(!angular.isObject(href)){
href = {
url: href,
method: "GET"
};
}
$http(href).then(
function(response) {
result = response.data;
var resultItems = null;
if (result._embedded) {
for ( var subItem in result._embedded)
break;
resultItems = result._embedded[subItem];
}
var promises = [];
if (links instanceof Array) {
if(links.length > 0){
var subLinks = fetchFirstLevelLinks(links);
if (resultItems instanceof Array) {
angular.forEach(resultItems,function(item) {
angular.forEach(subLinks, function(subLink) {
if (item._links[subLink]) {
var newSubLinks = fetchSubLinksFor(links,subLink);
if(!item._ref){
item._ref = {};
}
item._ref[subLink] = {};
promises.push(service.get(item._links[subLink].href,newSubLinks).then(function(response){
item._ref[subLink] = response;
}));
} else {
ERROR("SubLink : "+ subLink+ " not found in "+ item._links.self.href);
deferred.reject("SubLink : "+ subLink+ " not found in "+ item._links.self.href);
}
},this);
},this);
// deferred.resolve(result);
} else {
angular.forEach(subLinks,function(subLink) {
if (result._links[subLink]) {
var newSubLinks = fetchSubLinksFor(links,subLink);
if(!result._ref){
result._ref = {};
}
result._ref[subLink] = {};
promises.push(service.get(result._links[subLink].href,newSubLinks).then(function(response){
result._ref[subLink] = response;
}));
} else {
ERROR("SubLink : "+ subLink+ " not found in "+ result._links.self.href);
deferred.reject("SubLink : "+ subLink+ " not found in "+ result._links.self.href);
}
},this);
// deferred.resolve(result);
}
}
// else{
// deferred.resolve(result);
// }
}
//else{
if(isWait){
$q.all(promises).then(function(values){
deferred.resolve(result);
});
}
else{
deferred.resolve(result);
}
//}
}.bind(this),
function(response) {
ERROR('Href : '+ href+ ' : '+ response.status+ ' : '+ response.statusText);
deferred.reject('Href : '+ href+ ' : '+ response.status+ ' : '+ response.statusText);
}.bind(this));
return deferred.promise;
};
service.save = function(obj,repository){
var deferred = $q.defer();
if (!APIs) {
service.init();
}
for(var item in obj._ref){
if(obj._ref[item])
if(obj._ref[item]._links)
obj[item] = obj._ref[item]._links.self.href;
}
if(obj._links && obj._links.self){
//PUT
$http.put(obj._links.self.href,obj).then(
function(response){
if(config.putResponseBody){
for(var item in response.data){
obj[item] = response.data[item];
}
}
deferred.resolve(response);
}.bind(this),
function(response){
ERROR('PUT Error on Href : '+ postUrl+ ' : '+ response.status+ ' : '+ response.statusText);
DEBUG(response);
deferred.reject('PUT Error on Href : '+ postUrl+ ' : '+ response.status+ ' : '+ response.statusText);
}.bind(this)
);
}else{
//POST
if (!repository) {
ERROR('SpringDataRestApi.save(<object>,<type of repository>) : here type of repository cannot be null in POST');
deferred.reject('SpringDataRestApi.save(<object>,<type of repository>) : here type of repository cannot be null in POST');
}
if (!APIs[repository]) {
ERROR('Type of repository : ' + repository+ ' not found in the API');
deferred.reject('Type of repository : ' + repository+ ' not found in the API');
}
var postUrl = extractUrl(APIs[repository].href, (APIs[repository].templated)?(APIs[repository].templated):false);
$http.post(postUrl,obj).then(
function(response){
if(config.postResponseBody){
for(var item in response.data){
obj[item] = response.data[item];
}
}
deferred.resolve(response);
}.bind(this),
function(response){
ERROR('POST Error on Href : '+ postUrl+ ' : '+ response.status+ ' : '+ response.statusText);
DEBUG(response);
deferred.reject('POST Error on Href : '+ postUrl+ ' : '+ response.status+ ' : '+ response.statusText);
}.bind(this)
);
}
return deferred.promise;
};
service.remove = function(obj){
var deferred = $q.defer();
if(!obj._links||!obj._links.self||!obj._links.self.href){
deferred.reject('DELETE Failed Error on Href : '+ obj._links.self.href+ ' : '+ response.status+ ' : '+ response.statusText);
}else{
$http.delete(obj._links.self.href).then(
function(response){
deferred.resolve(response);
}.bind(this),
function(response){
ERROR('DELETE Error on Href : '+ obj._links.self.href+ ' : '+ response.status+ ' : '+ response.statusText);
DEBUG(response);
deferred.reject('DELETE Error on Href : '+ obj._links.self.href+ ' : '+ response.status+ ' : '+ response.statusText);
}.bind(this)
);
}
return deferred.promise;
};
return service;
}
return provider;
});
function fetchFirstLevelLinks(links) {
var firstLevelLinks = [];
for (var i = 0; i < links.length; i++) {
if(links[i]){
var subLinks = links[i].split('.');
firstLevelLinks.push(subLinks[0]);
}
}
return firstLevelLinks;
}
function fetchSubLinksFor(links,mainLink) {
var subLinks = null;
for (var i = 0; i < links.length; i++) {
var tmp = links[i].split('.')
if(tmp.length > 1){
var parts = links[i].split(/\.(.+)?/);
if(parts[0]==mainLink){
if(!subLinks){
subLinks = new Array();
}
subLinks.push(parts[1]);
}
}
}
return subLinks;
}
/**
* Returns the template parameters of the given url as object. e.g. from
* this url 'http://localhost:8080/categories{?page,size,sort}' it will
* return the following object: {'page': "", 'size': "", 'sort': ""}
*
* @param {string}
* url the url with the template parameters
* @returns {object} the object containing the template parameters
*/
function extractTemplateParameters(url) {
var templateParametersObject = {};
var regexp = /{\?(.*)}/g;
var templateParametersArray = regexp.exec(url)[1].split(',');
angular.forEach(templateParametersArray, function(value) {
templateParametersObject[value] = "";
});
return templateParametersObject;
}
/**
* Removes the template parameters of the given url. e.g. from this url
* 'http://localhost:8080/categories{?page,size,sort}' it will remove the
* curly braces and everything within.
*
* @param {string}
* url the url with the template parameters
* @returns {string} the url without the template parameters
*/
function removeTemplateParameters(url) {
return url.replace(/{.*}/g, '');
}
/**
* Extracts the url out of a url string. If template parameters exist, they
* will be removed from the returned url.
*
* @param {string}
* url the url string from which to extract the url
* @param {boolean}
* templated true if the url is templated
* @returns {string} the url of the resource object
*/
function extractUrl(url, templated) {
if (templated) {
url = removeTemplateParameters(url)
}
return url;
}
})();