MB-68819 - problem copying non-objects as TSV

The "Copy as TSV" button in Morpheus works fine when the result
contains JSON objects, but it doesn't work correctly when the result
contains JSON primitive values such as strings. This change enhances
the TSV code to handle cases where a document might be a primitive
instead of an object

For a demonstration of the problem and fix, see this video:

https://drive.google.com/file/d/11iVTMfdKSdHGIQ7wDemm-ecnSMJJowlm/view?usp=share_link

For information on how to set up the data, see this video:

https: //drive.google.com/file/d/14feLMyZG-X0pw0ueLdQRC7Y3hm32vh6i/view?usp=share_link

Change-Id: I795d225fece68018838a91f7a0aa437cf45f807d
Reviewed-on: https://review.couchbase.org/c/query-ui/+/240098
Well-Formed: Restriction Checker
Tested-by: Eben Haber <eben@couchbase.com>
Reviewed-by: Raluca Lupu <raluca.lupu@couchbase.com>

Author: ebenhaber

query-ui/angular-services/qw.json.csv.service.js

@@ -70,7 +70,11 @@ function getQwJsonCsvService() {
     //console.log("Converting result to CSV: " + _.isArray(docArray) + ", " + docArray.length);
 
     // we need an array
-    if (!_.isArray(docArray) || docArray.length == 0)
+    if (!_.isArray(docArray))
+      return([docArray]);
+
+    // we need an array with stuff in it
+    if (docArray.length == 0)
       return(data);
 
     // figure out what fields we have available, by looking at each doc
@@ -121,6 +125,12 @@ function getQwJsonCsvService() {
   //
 
   function getFields(doc,fieldInfo) {
+    // if we have a raw value, indicate as much
+    if (!_.isPlainObject(doc)) {
+     fieldInfo[''] = {nonobj:true};
+     return;
+    }
+
     // assume docs are objects. docs are permitted to be raw values like a string or
     // number, but that can't be flattened into CSV
     for (var key in doc) {
@@ -165,6 +175,11 @@ function getQwJsonCsvService() {
   //
 
   function convertDocToArray(doc,fieldInfo,valArray) {
+    // if the document is a raw value, we just output it as the only value in the array
+    if (fieldInfo['']?.nonobj && !_.isPlainObject(doc)) {
+      valArray.push(doc);
+      return;
+    }
 
     // for each field...
     Object.keys(fieldInfo).sort().forEach(function(fieldName,index) {