attr detail handles label/relation definition updates

src/public/app/services/promoted_attribute_definition_parser.js

@@ -0,0 +1,35 @@
+function parse(value) {
+    const tokens = value.split(',').map(t => t.trim());
+    const defObj = {};
+
+    for (const token of tokens) {
+        if (token === 'promoted') {
+            defObj.isPromoted = true;
+        }
+        else if (['text', 'number', 'boolean', 'date', 'url'].includes(token)) {
+            defObj.labelType = token;
+        }
+        else if (['single', 'multi'].includes(token)) {
+            defObj.multiplicity = token;
+        }
+        else if (token.startsWith('precision')) {
+            const chunks = token.split('=');
+
+            defObj.numberPrecision = parseInt(chunks[1]);
+        }
+        else if (token.startsWith('inverse')) {
+            const chunks = token.split('=');
+
+            defObj.inverseRelation = chunks[1];
+        }
+        else {
+            console.log("Unrecognized attribute definition token:", token);
+        }
+    }
+
+    return defObj;
+}
+
+export default {
+    parse
+};