feat (QA): Support answer rendering without evidence.

Author: Kshitij Fadnis

src/applications/qa/index.js

@@ -55,15 +55,28 @@ async function ask(
     if (resp && !_.isEmpty(resp)) {
       // Step 2.a: Iterate over each entry in response to build answer's object
       resp.forEach((entry) => {
-        answers.push({
+        // Step 2.a.i: Mandator fields
+        let answer = {
           text: entry.answer.text,
-          context: entry.document.text,
-          startCharOffset: entry.answer.start_char_offset,
-          endCharOffset: entry.answer.end_char_offset,
-          title: entry.document.title,
-          url: entry.document.url,
           confidenceScore: entry.answer.confidence_score,
-        });
+        };
+
+        // Step 2.a.ii: Optional fields
+        if (entry.document) {
+          answer.context = entry.document.text;
+          answer.title = entry.document.title;
+          answer.url = entry.document.url;
+        }
+
+        if (entry.answer.start_char_offset) {
+          answer.startCharOffset = entry.answer.start_char_offset;
+        }
+
+        if (entry.answer.end_char_offset) {
+          answer.endCharOffset = entry.answer.end_char_offset;
+        }
+
+        answers.push(answer);
       });
     }
 

src/components/answers/index.js

@@ -58,17 +58,24 @@ async function buildAnswersWithFeedback(
   // Step 1.a: Iterate over each answer
   answers.forEach((answer, answerIndex) => {
     // Step 1.a.i: Generate feedback_id
-    const feedback_id = generateUUID(
-      question +
-        "::" +
-        answer.context.replace(/\s/g, "") +
-        "::" +
-        answer.text.replace(/\s/g, "") +
-        "::" +
-        answer.startCharOffset +
-        "::" +
-        answer.endCharOffset
-    );
+    let feedback_id = null;
+    if (answer.context && answer.startCharOffset && answer.endCharOffset) {
+      feedback_id = generateUUID(
+        question +
+          "::" +
+          answer.context.replace(/\s/g, "") +
+          "::" +
+          answer.text.replace(/\s/g, "") +
+          "::" +
+          answer.startCharOffset +
+          "::" +
+          answer.endCharOffset
+      );
+    } else {
+      feedback_id = generateUUID(
+        question + "::" + answer.text.replace(/\s/g, "")
+      );
+    }
 
     // Step 1.a.ii: Update feedbackIdToAnswerIndexMap
     feedbackIdToAnswerIndexMap.set(feedback_id, answerIndex);