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Merge pull request #33 from CMSgov/jfuqian/BB2-1701-Node-Sample-App-c…
…ode-cleanup [BB2-1701] Node Sample App code cleanup and re-factor to use SDK
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| # Blue Button 2.0 Sample Application Development Documentation | ||
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| ## Introduction | ||
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| This README contains information related to developing the SDK. | ||
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| It is intended for BB2 team members or others performing sample application development work. | ||
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| ## Run selenium tests in docker | ||
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| Configure the remote target BB2 instance where the tested app is registered (as described above "Running the Back-end & Front-end") | ||
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| Change your `callbackUrl` configuration to use `server` instead of `localhost`. For example: | ||
| ```JSON | ||
| "callback_url": "http://server:3001/api/bluebutton/callback/" | ||
| ``` | ||
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| You can also start your configuration by the following the sample config template for selenium tests: | ||
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| cp server/sample-bluebutton-selenium-config.json server/.bluebutton-config.json | ||
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| You will also need to add this URL to your `redirect_uris` list in your application's configuration on the BB2 Sandbox UI. | ||
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| Go to local repository base directory and run docker compose as below: | ||
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| docker-compose -f docker-compose.selenium.yml up --abort-on-container-exit | ||
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| Note: --abort-on-container-exit will abort client and server containers when selenium tests ends | ||
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| Note: You may need to clean up already existing Docker containers, if you are having issues or have changed your configuration file. | ||
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| ## Visual trouble shoot | ||
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| Install VNC viewer and point browser to http://localhost:5900 to monitor web UI interactions |
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| import express, { Request, Response } from "express"; | ||
| import { AuthorizationToken, BlueButton } from "cms-bluebutton-sdk"; | ||
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| interface User { | ||
| authToken?: AuthorizationToken, | ||
| eobData?: any, | ||
| errors?: string[] | ||
| } | ||
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| const BENE_DENIED_ACCESS = "access_denied" | ||
| const FE_MSG_ACCESS_DENIED = "Beneficiary denied app access to their data" | ||
| const ERR_QUERY_EOB = "Error when querying the patient's EOB!" | ||
| const ERR_MISSING_AUTH_CODE = "Response was missing access code!" | ||
| const ERR_MISSING_STATE = "State is required when using PKCE" | ||
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| const app = express(); | ||
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| const bb = new BlueButton(); | ||
| const authData = bb.generateAuthData(); | ||
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| // This is where medicare.gov beneficiary associated | ||
| // with the current logged in app user, | ||
| // in real app, this could be the app specific | ||
| // account management system | ||
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| const loggedInUser: User = { | ||
| }; | ||
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| // helper to clean up cached eob data | ||
| function clearBB2Data() { | ||
| loggedInUser.authToken = undefined; | ||
| loggedInUser.eobData = {}; | ||
| } | ||
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| // AuthorizationToken holds access grant info: | ||
| // access token, expire in, expire at, token type, scope, refreh token, etc. | ||
| // it is associated with current logged in user in real app, | ||
| // check SDK js docs for more details. | ||
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| let authToken: AuthorizationToken; | ||
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| // auth flow: response with URL to redirect to Medicare.gov beneficiary login | ||
| app.get("/api/authorize/authurl", (req: Request, res: Response) => { | ||
| res.send(bb.generateAuthorizeUrl(authData)); | ||
| }); | ||
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| // auth flow: oauth2 call back | ||
| app.get("/api/bluebutton/callback", (req: Request, res: Response) => { | ||
| (async (req: Request, res: Response) => { | ||
| if (typeof req.query.error === "string") { | ||
| // clear all cached claims eob data since the bene has denied access | ||
| // for the application | ||
| clearBB2Data(); | ||
| let errMsg = req.query.error; | ||
| if (req.query.error === BENE_DENIED_ACCESS) { | ||
| errMsg = FE_MSG_ACCESS_DENIED; | ||
| } | ||
| loggedInUser.eobData = {"message": errMsg}; | ||
| process.stdout.write(errMsg + '\n'); | ||
| } else { | ||
| if ( | ||
| typeof req.query.code === "string" && | ||
| typeof req.query.state === "string" | ||
| ) { | ||
| try { | ||
| authToken = await bb.getAuthorizationToken( | ||
| authData, | ||
| req.query.code, | ||
| req.query.state | ||
| ); | ||
| // data flow: after access granted | ||
| // the app logic can fetch the beneficiary's data in app specific ways: | ||
| // e.g. download EOB periodically etc. | ||
| // access token can expire, SDK automatically refresh access token when that happens. | ||
| const eobResults = await bb.getExplanationOfBenefitData(authToken); | ||
| authToken = eobResults.token; // in case authToken got refreshed during fhir call | ||
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| loggedInUser.authToken = authToken; | ||
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| loggedInUser.eobData = eobResults.response?.data; | ||
| } catch (e) { | ||
| loggedInUser.eobData = {}; | ||
| process.stdout.write(ERR_QUERY_EOB + '\n'); | ||
| process.stdout.write("Exception: " + e + '\n'); | ||
| } | ||
| } else { | ||
| clearBB2Data(); | ||
| process.stdout.write(ERR_MISSING_AUTH_CODE + '\n'); | ||
| process.stdout.write("OR" + '\n'); | ||
| process.stdout.write(ERR_MISSING_STATE + '\n'); | ||
| process.stdout.write("AUTH CODE: " + req.query.code + '\n'); | ||
| process.stdout.write("STATE: " + req.query.state + '\n'); | ||
| } | ||
| } | ||
| const fe_redirect_url = | ||
| process.env.SELENIUM_TESTS ? 'http://client:3000' : 'http://localhost:3000'; | ||
| res.redirect(fe_redirect_url); | ||
| } | ||
| )(req, res); | ||
| }); | ||
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| // data flow: front end fetch eob | ||
| app.get("/api/data/benefit", (req: Request, res: Response) => { | ||
| if (loggedInUser.eobData) { | ||
| res.json(loggedInUser.eobData); | ||
| } | ||
| }); | ||
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| const port = 3001; | ||
| app.listen(port, () => { | ||
| process.stdout.write(`[server]: Server is running at https://localhost:${port}`); | ||
| process.stdout.write("\n"); | ||
| }); |
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