fix: Action will not assign user if another user is assigned (#6)

action.yml

@@ -20,14 +20,21 @@ runs:
         ISSUE_NUMBER="$(jq '.issue.number' $GITHUB_EVENT_PATH)"
         LOGIN="$(jq '.comment.user.login' $GITHUB_EVENT_PATH | tr -d \")"
         REPO="$(jq '.repository.full_name' $GITHUB_EVENT_PATH | tr -d \")"
+        ISSUE_JSON="$(jq '.issue' $GITHUB_EVENT_PATH)"
+        ISSUE_CURRENTLY_ASSIGNED=`echo $ISSUE_JSON | jq '.assignees | length == 0'`
 
         if [[ $BODY == *".take"* ]]; then
-          echo "Assigning issue $ISSUE_NUMBER to $LOGIN"
-          echo "Using the link: https://api.github.com/repos/$REPO/issues/$ISSUE_NUMBER/assignees"
-          curl -H "Authorization: token $GITHUB_TOKEN" -d '{"assignees":["'"$LOGIN"'"]}' https://api.github.com/repos/$REPO/issues/$ISSUE_NUMBER/assignees
-          if [[ ! -z $INPUT_MESSAGE ]]; then
-            jq -n -r --arg body "$INPUT_MESSAGE" '{body: $body}' > payload.json
-            curl -X POST -H "Authorization: token $GITHUB_TOKEN" --data @payload.json https://api.github.com/repos/$REPO/issues/$ISSUE_NUMBER/comments
+          if [[ "$ISSUE_CURRENTLY_ASSIGNED" == true ]]; then
+            echo "$ISSUE_CURRENTLY_ASSIGNED"
+            echo "Assigning issue $ISSUE_NUMBER to $LOGIN"
+            echo "Using the link: https://api.github.com/repos/$REPO/issues/$ISSUE_NUMBER/assignees"
+            curl -H "Authorization: token $GITHUB_TOKEN" -d '{"assignees":["'"$LOGIN"'"]}' https://api.github.com/repos/$REPO/issues/$ISSUE_NUMBER/assignees
+            if [[ ! -z $INPUT_MESSAGE ]]; then
+              jq -n -r --arg body "$INPUT_MESSAGE" '{body: $body}' > payload.json
+              curl -X POST -H "Authorization: token $GITHUB_TOKEN" --data @payload.json https://api.github.com/repos/$REPO/issues/$ISSUE_NUMBER/comments
+            fi
+          else
+            echo "This issue is currently assigned to a different user"
           fi
         fi
       shell: bash