added launch-local launch point for kicking off a local-resource base…

…d launch. includes functionality to present a list of resource bundles in a predefined local folder to the user, and to collect the name of one of them from the user in order to kick off a launch. for issue #31

src/main/java/edu/ohsu/cmp/coach/controller/SessionController.java

@@ -6,6 +6,7 @@
 import edu.ohsu.cmp.coach.model.fhir.FHIRCredentialsWithClient;
 import edu.ohsu.cmp.coach.model.recommendation.Audience;
 import edu.ohsu.cmp.coach.util.FhirUtil;
+import edu.ohsu.cmp.coach.util.FileUtil;
 import edu.ohsu.cmp.coach.workspace.UserWorkspace;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -18,6 +19,8 @@
 import org.springframework.web.bind.annotation.RequestParam;
 
 import javax.servlet.http.HttpSession;
+import java.io.IOException;
+import java.util.List;
 
 @Controller
 public class SessionController extends BaseController {
@@ -26,6 +29,23 @@ public class SessionController extends BaseController {
     @Value("${socket.timeout:300000}")
     private Integer socketTimeout;
 
+    @Value("${security.permit-load-local}")
+    private Boolean permitLoadLocal;
+
+    @Value("${local-test-resources-path}")
+    private String localTestResourcesPath;
+
+    @GetMapping("launch-local")
+    public String launchLocal(Model model) throws IOException {
+        model.addAttribute("applicationName", applicationName);
+        if (permitLoadLocal) {
+            model.addAttribute("permitLoadLocal", true);
+            List<String> bundleItems = FileUtil.getFilenameList(localTestResourcesPath);
+            model.addAttribute("bundleItems", bundleItems);
+        }
+        return "launch-local";
+    }
+
     @GetMapping("launch-ehr")
     public String launchEHR(Model model) {
         model.addAttribute("applicationName", applicationName);
@@ -45,6 +65,15 @@ public String launchPatient(Model model) {
         return "launch-patient";
     }
 
+    @PostMapping("prepare-detached-session")
+    public ResponseEntity<?> prepareDetachedSession(HttpSession session,
+                                                    @RequestParam("bundleName") String bundleName) {
+
+        logger.info("preparing local detached session for bundle=" + bundleName);
+
+        return ResponseEntity.ok("session configured successfully");
+    }
+
     @PostMapping("prepare-session")
     public ResponseEntity<?> prepareSession(HttpSession session,
                                             @RequestParam("clientId") String clientId,

src/main/java/edu/ohsu/cmp/coach/util/FileUtil.java

@@ -0,0 +1,48 @@
+package edu.ohsu.cmp.coach.util;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.*;
+import java.util.ArrayList;
+import java.util.List;
+
+public class FileUtil {
+    private static final Logger logger = LoggerFactory.getLogger(FileUtil.class);
+
+    public static List<String> getResourceFilenameList(String resourcePath) throws IOException {
+        List<String> list = new ArrayList<>();
+
+        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
+        try (InputStream in = classLoader.getResourceAsStream(resourcePath)) {
+            if (in != null) {
+                BufferedReader reader = new BufferedReader(new InputStreamReader(in));
+                String resource;
+                while ((resource = reader.readLine()) != null) {
+                    list.add(resource);
+                }
+            } else {
+                logger.error("couldn't obtain resource as stream for resourcePath=" + resourcePath);
+            }
+        }
+
+        return list;
+    }
+
+    public static List<String> getFilenameList(String path) throws IOException {
+        List<String> list = new ArrayList<>();
+
+        File dir = new File(path);
+        File[] fileArr = dir.listFiles();
+        if (fileArr != null) {
+            for (File file : fileArr) {
+                list.add(file.getName());
+            }
+
+        } else {
+            throw new IOException(path + " is not a directory");
+        }
+
+        return list;
+    }
+}

src/main/resources/application.properties

@@ -7,6 +7,9 @@ server.port=8082
 security.salt=CHANGE_THIS_BEFORE_RUNNING_IN_PRODUCTION
 security.show-dev-errors=false
 security.browser.cache-credentials=false
+security.permit-load-local=false
+
+local-test-resources-path=c://git//coach//test-resource-bundles/
 
 feature.button.clear-supplemental-data.show=false
 

src/main/resources/templates/launch-local.mustache

@@ -0,0 +1,65 @@
+<!DOCTYPE html>
+<html lang="en">
+{{#permitLoadLocal}}
+    <head>
+        <meta charset="UTF-8">
+        <title>{{applicationName}} - Load Local Patient</title>
+        <script type="text/javascript" src="/node_modules/jquery/dist/jquery.js"></script>
+        <script type="text/javascript">
+            const REDIRECT_URL = "/";
+
+            function prepareSession(bundleName) {
+                let data = {
+                    bundleName: bundleName
+                };
+
+                // alert("useful development breakpoint");
+
+                $.ajax({
+                    method: "POST",
+                    url: "/prepare-detached-session",
+                    data: data
+                }).done(function(cards, textStatus, jqXHR) {
+                    if (jqXHR.status === 200) {
+                        $('body').html("Handshake completed, redirecting ...<br/>If you are not redirected, please <a href='" + REDIRECT_URL + "'>click here</a>.")
+                        window.location.href = REDIRECT_URL;
+
+                    } else {
+                        $('body').html("Error - received response " + response.status + " status");
+                    }
+                });
+            }
+
+            $(document).on('click', '#launchButton', function() {
+                let bundleName = $('#bundleName').val();
+                prepareSession(bundleName);
+            });
+
+            $(document).on('change', '#bundleName', function() {
+                $('#launchButton').prop('disabled', $(this).val() === '');
+            });
+        </script>
+    </head>
+    <body>
+    Select a local FHIR Resource Bundle:
+    <form action="/prepare-detached-session">
+        <select id="bundleName">
+            <option value="">-- Select a Local Bundle --</option>
+            {{#bundleItems}}
+                <option value="{{.}}">{{.}}</option>
+            {{/bundleItems}}
+        </select>
+        <input id="launchButton" type="button" value="Launch Detached" disabled />
+    </form>
+    </body>
+{{/permitLoadLocal}}
+{{^permitLoadLocal}}
+    <head>
+        <meta charset="UTF-8">
+        <title>{{applicationName}} - Operation Not Supported</title>
+    </head>
+    <body>
+        This operation is not currently supported.
+    </body>
+{{/permitLoadLocal}}
+</html>