/
modelizer-client.js
executable file
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/
modelizer-client.js
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/**
* The Client implementation of Modelizer
*
* run:
* browserify ./lib/modelizer-client.js -r ./lib/modelizer-client:modelizer -r q -o ./browser-dist/modelizer.js
*/
var Q = require('q');
var http = require('http');
var assert = require('./microlibs').assert;
var check = require('./microlibs').check;
var isEmptyObject = require('./microlibs').isEmptyObject;
var Model = require('./model');
// Using the REST-Interface
Model.ClientConnector = function (host, port) {
var unpackInterceptor = function (model, callback) {
return function (err, docs) {
if (err == undefined) {
if (Array.isArray(docs)) { // result is a collection
for (var i = 0; i < docs.length; i++) {
model._transform(model, docs[i], 'unpack');
}
} else {
model._transform(model, docs, 'unpack');
}
}
callback(err, docs);
}
};
var cookie;
// ajax Call to the server backend
var ajaxCall = function (method, path, data, callback) {
var options = {
host: host,
port: port,
path: path,
method: method,
withCredentials: true
}
if (data != undefined) {
options.headers = {
'Content-Type': 'application/json;charset=utf-8',
'Accept': 'application/json, text/plain, */*'
};
} else {
options.headers = {
'Accept': 'application/json, text/plain, */*'
};
}
// this is only necessary if you use the client via node
// browsers handle cookies on their own
if (cookie) {
options.headers['Cookie'] = cookie;
}
var req = http.request(options, function (res) {
if (res.headers['set-cookie']) {
// funktioniert nur mit einem cookie
cookie = res.headers['set-cookie'][0].split(";")[0];
}
var data = '';
res.on('data', function (chunk) {
data += chunk;
});
res.on('end', function () {
data = JSON.parse(data);
if (data.hasOwnProperty("error")) {
callback(new Error(data.error), null);
} else {
if (res.statusCode == 200) {
callback(undefined, data);
} else {
callback(new Error(data.error), null);
}
}
});
});
req.on('error', function (e) {
callback(new Error("Error in HTTP request:\n " + e.message), null);
});
if (data != undefined) {
req.write(JSON.stringify(data));
}
req.end();
};
/*
$http({method: method, url: url, data: data, withCredentials: true, cache: false})
.success(function (data, status, headers, config) {
if (status == 200) {
if (!status.hasOwnProperty("error")) {
callback(undefined, data);
} else {
callback(status.error, null);
}
} else {
callback(new Error("HTTP Response != 200"), null);
}
})
.error(function (data, status, headers, config) {
if (data.hasOwnProperty("error")) {
callback(new Error(data.error), null);
} else {
callback(new Error("Error in $http-request"), null);
}
});
*/
return function (theModel) {
return {
find: function (search, callback) {
if (isEmptyObject(search)) {
ajaxCall('GET', '/' + theModel.modelName + '/all', undefined, unpackInterceptor(theModel, callback));
} else {
ajaxCall('POST', '/' + theModel.modelName + '/find', search, unpackInterceptor(theModel, callback));
}
},
findOne: function (search, callback) {
assert(search.hasOwnProperty("_id"), "Only searching for id implemented so far");
ajaxCall('GET', '/' + theModel.modelName + '/' + search._id, undefined, unpackInterceptor(theModel, callback));
},
save: function (doc, callback) {
theModel._transform(theModel, doc, 'pack');
ajaxCall('PUT', '/' + theModel.modelName + '/', doc, callback);
},
remove: function (id, ignored, callback) {
ajaxCall('DELETE', '/' + theModel.modelName + '/' + id._id, undefined, callback);
},
callOperation: function (opName, params, HTMLrequest) {
var deferred = Q.defer();
ajaxCall('PUT', '/' + theModel.modelName + '/' + opName, params, function (err, result) {
if (theModel.operations.hasOwnProperty(opName)) { // call is an operation
if (err) deferred.reject(err);
else deferred.resolve(result);
} else if (theModel.factorys.hasOwnProperty(opName)) { // call is an factory
unpackInterceptor(theModel, function(err, result) {
if (err) {
deferred.reject(err);
return deferred.promise;
}
// restore object from document
if (Array.isArray(result)) { // result is a collection
// für jedes document in der DB ein object anlegen
for (var i = 0; i < result.length; i++) {
result[i] = theModel.loadFromDoc(result[i]);
}
} else { // result is one object
result = theModel.loadFromDoc(result); // restore one object
}
deferred.resolve(result);
})(err, result);
} else {
assert(false, "operation or factory is not defined");
}
});
return deferred.promise;
}
}
}
};
// CommonJS
module.exports = Model;