Added subject / quesction count on subject browser site

src/pages/subjectBrowser.js

@@ -13,6 +13,9 @@ export default function SubjectBrowser (props) {
   const [activeSubjName, setActiveSubjName] = useState('')
   const [searchTerm, setSearchTerm] = useState('')
 
+  const [sCount, setSCount] = useState(0)
+  const [qCount, setQCount] = useState(0)
+
   useEffect(() => {
     console.info('Fetching data')
     fetch(`${constants.apiUrl}data.json`)
@@ -21,6 +24,10 @@ export default function SubjectBrowser (props) {
       })
       .then((data) => {
         setData(data)
+        setSCount(data.Subjects.length)
+        setQCount(data.Subjects.reduce((acc, subj) => {
+          return acc + subj.Questions.length
+        }, 0))
       })
   }, [])
 
@@ -55,6 +62,9 @@ export default function SubjectBrowser (props) {
           onSubjSelect={(subjName) => { setActiveSubjName(subjName) }}
         />
         <hr />
+        <div>
+          {sCount} tárgy, {qCount} kérdés
+        </div>
         <div>
           <Subject
             subj={currSubj}