Update viewer to use prior studies for Hanging Protocols initialization and using those studies in HP Match Image process (added getStudyPriors and getStudyPriorsMap)

Packages/ohif-study-list/client/lib/getStudyPriorsMap.js

@@ -0,0 +1,33 @@
+import { OHIF } from 'meteor/ohif:core';
+import 'meteor/ohif:viewerbase';
+// Local Dependencies
+import { getStudyPriors } from './getStudyPriors';
+
+const StudyMetadata = OHIF.viewerbase.metadata.StudyMetadata;
+const StudySummary = OHIF.viewerbase.metadata.StudySummary;
+
+/**
+ * Create a Map of study priors where the key of each entry is the StudyInstanceUID and its value is an array of StudySummary instances.
+ * @returns {Map} The study map.
+ */
+const getStudyPriorsMap = studies => {
+
+    const priorsMap = new Map();
+
+    if (studies instanceof Array) {
+        studies.forEach(study => {
+            if (study instanceof StudyMetadata || study instanceof StudySummary) {
+                const studyInstanceUID = study.getStudyInstanceUID();
+                if (studyInstanceUID) {
+                    const priors = getStudyPriors(study);
+                    priorsMap.set(studyInstanceUID, priors);
+                }
+            }
+        });
+    }
+
+    return priorsMap;
+
+};
+
+export { getStudyPriorsMap };