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i2b2-dom.js
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Fri, Jul 26, 09:23

i2b2-dom.js
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/**
* TODO: make this and extension of mock-dom
*/
var wgxpath = require('wgxpath');
var Promise = require('bluebird');
var jsdom = require('node-jsdom');
var DOMParser = require('xmldom').DOMParser;
var fs = Promise.promisifyAll(require('fs'));
var path = require('path');
var HiveHelper = require('./hive-helper');
var clientLoadCallback;
var hiveHelper;
function I2B2DOM() {
//expose to client.
dom = this;
}
I2B2DOM.prototype.load = load;
I2B2DOM.prototype.getAbsolutePath = getAbsolutePath;
I2B2DOM.prototype.loadData = loadData;
I2B2DOM.prototype.mockMessageResult = mockMessageResult;
/**
* load files.
*/
function load(url, jsIncludes, onLoad) {
clientLoadCallback = onLoad;
jsdom.env(url, jsIncludes, main);
}
/**
* called when files are loaded.
*/
function main(errors, window) {
// -- setup other items such as window. -- //
wgxpath.install(window, true);
window.DOMParser = DOMParser;
hiveHelper = new HiveHelper(window);
// -- replace i2b2.h with ours -- //
if(window.i2b2) {
window.i2b2.h = hiveHelper;
}
dom.hiveHelper = hiveHelper;
dom.window = window;
// -- core dom ready -- //
clientLoadCallback(window);
}
/**
* utility for loading absolute path.
*/
function getAbsolutePath(relativePath) {
return path.join(__dirname, relativePath);
}
function loadData(filename) {
var absPath = getAbsolutePath(filename);
// -- create a promise after loading and parsing the file. --//
var promise = new Promise(function (resolve, reject) {
fs.readFileAsync(absPath)
.then(function (data) {
var str = String(data);
var results = {
error: false,
data: str
};
resolve(results);
});
});
return promise;
}
/**
* Return a promise that can be utilized after file is loaded and parsed.
*/
function mockMessageResult(filename) {
var absPath = getAbsolutePath(filename);
// -- create a promise after loading and parsing the file. --//
var promise = new Promise(function (resolve, reject) {
fs.readFileAsync(absPath)
.then(function (data) {
var str = String(data);
var xmlDoc = hiveHelper.parseXml(str);
var results = {
error: false,
refXML: xmlDoc
};
resolve(results);
});
});
return promise;
}
// -- singleton -- //
module.exports = new I2B2DOM();

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