Added $date$ placeholder

app/src/main/java/eu/faircode/email/EntityAnswer.java

@@ -48,9 +48,12 @@ import org.json.JSONObject;
 import java.io.Serializable;
 import java.text.Collator;
 import java.text.NumberFormat;
+import java.text.SimpleDateFormat;
 import java.util.ArrayList;
+import java.util.Calendar;
 import java.util.Collections;
 import java.util.Comparator;
+import java.util.Date;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Locale;
@@ -178,6 +181,30 @@ public class EntityAnswer implements Serializable {
         text = text.replace("$lastname$", last == null ? "" : Html.escapeHtml(last));
         text = text.replace("$email$", email == null ? "" : Html.escapeHtml(email));
 
+        int s = text.indexOf("$date");
+        while (s >= 0) {
+            int e = text.indexOf('$', s + 5);
+            if (e < 0)
+                break;
+
+            Calendar c = null;
+            String v = text.substring(s + 5, e);
+            if (v.startsWith("-") || v.startsWith("+")) {
+                Integer days = Helper.parseInt(v.substring(1));
+                if (days != null) {
+                    c = Calendar.getInstance();
+                    c.add(Calendar.DATE, days * (v.startsWith("-") ? -1 : 1));
+                }
+            } else if (TextUtils.isEmpty(v))
+                c = Calendar.getInstance();
+
+            if (c != null) {
+                v = Html.escapeHtml(SimpleDateFormat.getDateInstance(SimpleDateFormat.LONG).format(c.getTime()));
+                text = text.substring(0, s) + v + text.substring(e);
+                s = text.indexOf("$date", s + v.length());
+            }
+        }
+
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
         for (String key : prefs.getAll().keySet())
             if (key.startsWith(PREF_PLACEHOLDER)) {

app/src/main/java/eu/faircode/email/FragmentAnswer.java

@@ -321,6 +321,9 @@ public class FragmentAnswer extends FragmentBase {
             } else if (itemId == R.id.menu_placeholder_lastname) {
                 onMenuPlaceholder("$lastname$");
                 return true;
+            } else if (itemId == R.id.menu_placeholder_date) {
+                onMenuPlaceholder("$date$");
+                return true;
             }
         }
         return super.onOptionsItemSelected(item);

app/src/main/res/menu/menu_answer.xml

@@ -22,6 +22,9 @@
             <item
                 android:id="@+id/menu_placeholder_lastname"
                 android:title="@string/title_answer_placeholder_lastname" />
+            <item
+                android:id="@+id/menu_placeholder_date"
+                android:title="@string/title_answer_placeholder_date" />
         </menu>
     </item>
 </menu>

app/src/main/res/values/strings.xml

@@ -1682,6 +1682,7 @@
     <string name="title_answer_placeholder_email">Sender\'s email address</string>
     <string name="title_answer_placeholder_firstname">Sender\'s first name</string>
     <string name="title_answer_placeholder_lastname">Sender\'s last name</string>
+    <string name="title_answer_placeholder_date">Current date</string>
 
     <string name="title_rule_noop">No action</string>
     <string name="title_rule_seen">Mark read</string>