OHIF-135: providing all data required by cornerstoneWADOImageLoader to wadors instances

Packages/ohif-viewerbase/client/lib/classes/metadata/WadoRsMetaDataBuilder.js

@@ -0,0 +1,48 @@
+export class WadoRsMetaDataBuilder {
+    constructor() {
+        this.tags = {};
+    }
+
+    addTag(tag, value, multi) {
+        this.tags[tag] = {
+            tag,
+            value,
+            multi
+        };
+
+        return this;
+    }
+
+    toJSON() {
+        const json = {};
+        const keys = Object.keys(this.tags);
+
+        keys.forEach(key => {
+            if (!this.tags.hasOwnProperty(key)) {
+                return;
+            }
+
+            const tag = this.tags[key];
+            const multi = !!tag.multi;
+            let value = tag.value;
+
+            if ((value == null) || ((value.length === 1) && (value[0] == null))) {
+                return;
+            }
+
+            if ((typeof value === 'string') && multi) {
+                value = value.split('\\');
+            }
+
+            if (!_.isArray(value)) {
+                value = [value];
+            }
+
+            json[key] = {
+                Value: value
+            };
+        });
+
+        return json;
+    }
+}