Added resaons in dropdown list

app/src/main/java/fr/free/nrw/commons/delete/ReasonBuilder.java

@@ -0,0 +1,102 @@
+package fr.free.nrw.commons.delete;
+
+import android.accounts.Account;
+import android.content.Context;
+import android.util.Log;
+
+import com.google.gson.JsonObject;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Locale;
+
+import javax.inject.Inject;
+
+import fr.free.nrw.commons.Media;
+import fr.free.nrw.commons.R;
+import fr.free.nrw.commons.auth.SessionManager;
+import fr.free.nrw.commons.mwapi.MediaWikiApi;
+import fr.free.nrw.commons.utils.ViewUtil;
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.disposables.CompositeDisposable;
+import io.reactivex.schedulers.Schedulers;
+import timber.log.Timber;
+
+public class ReasonBuilder {
+
+    private SessionManager sessionManager;
+    private MediaWikiApi mediaWikiApi;
+    private CompositeDisposable compositeDisposable = new CompositeDisposable();
+
+    private String reason;
+    private Context context;
+    private Media media;
+
+    public ReasonBuilder(String reason,
+                         Context context,
+                         Media media,
+                         SessionManager sessionManager,
+                         MediaWikiApi mediaWikiApi){
+        this.reason = reason;
+        this.context = context;
+        this.media = media;
+        this.sessionManager = sessionManager;
+        this.mediaWikiApi = mediaWikiApi;
+    }
+
+    private String prettyUploadedDate(Media media) {
+        Date date = media.getDateUploaded();
+        if (date == null || date.toString() == null || date.toString().isEmpty()) {
+            return "Uploaded date not available";
+        }
+        SimpleDateFormat formatter = new SimpleDateFormat("dd MMM yyyy", Locale.getDefault());
+        return formatter.format(date);
+    }
+
+    private void fetchArticleNumber() {
+        if (checkAccount()) {
+            compositeDisposable.add(mediaWikiApi
+                    .getAchievements(sessionManager.getCurrentAccount().name)
+                    .subscribeOn(Schedulers.io())
+                    .observeOn(AndroidSchedulers.mainThread())
+                    .subscribe(
+                            jsonObject -> appendArticlesUsed(jsonObject),
+                            t -> Timber.e(t, "Fetching achievements statistics failed")
+                    ));
+        }
+    }
+
+    private void appendArticlesUsed(JSONObject object){
+        try {
+            reason += ". Uploaded by myself on" + prettyUploadedDate(media);
+            reason += ",used in " + object.getInt("articlesUsingImages") + " articles";
+            Log.i("New Reason", reason);
+        } catch (JSONException e) {
+            e.printStackTrace();
+        }
+    }
+
+
+    public String getReason(){
+        fetchArticleNumber();
+        return reason;
+    }
+
+    /**
+     * check to ensure that user is logged in
+     * @return
+     */
+    private boolean checkAccount(){
+        Account currentAccount = sessionManager.getCurrentAccount();
+        if(currentAccount == null) {
+            Timber.d("Current account is null");
+            ViewUtil.showLongToast(context, context.getResources().getString(R.string.user_not_logged_in));
+            sessionManager.forceLogin(context);
+            return false;
+        }
+        return true;
+    }
+}