Fix reporting mode build issue

* Add isCaughtUp() as a member function of RelationalDBInterfacePostgres

src/ripple/app/ledger/impl/LedgerMaster.cpp

@@ -273,7 +273,7 @@ LedgerMaster::getValidatedLedgerAge()
 
 #ifdef RIPPLED_REPORTING
     if (app_.config().reporting())
-        return dynamic_cast<RelationalDBInterfacePostgres*>(
+        return static_cast<RelationalDBInterfacePostgres*>(
                    &app_.getRelationalDBInterface())
             ->getValidatedLedgerAge();
 #endif
@@ -299,20 +299,9 @@ LedgerMaster::isCaughtUp(std::string& reason)
 
 #ifdef RIPPLED_REPORTING
     if (app_.config().reporting())
-    {
-        auto age = PgQuery(app_.getPgPool())("SELECT age()");
-        if (!age || age.isNull())
-        {
-            reason = "No ledgers in database";
-            return false;
-        }
-        if (std::chrono::seconds{age.asInt()} > 3min)
-        {
-            reason = "No recently-published ledger";
-            return false;
-        }
-        return true;
-    }
+        return static_cast<RelationalDBInterfacePostgres*>(
+                   &app_.getRelationalDBInterface())
+            ->isCaughtUp(reason);
 #endif
 
     if (getPublishedLedgerAge() > 3min)
@@ -1665,7 +1654,7 @@ LedgerMaster::getCompleteLedgers()
 {
 #ifdef RIPPLED_REPORTING
     if (app_.config().reporting())
-        return dynamic_cast<RelationalDBInterfacePostgres*>(
+        return static_cast<RelationalDBInterfacePostgres*>(
                    &app_.getRelationalDBInterface())
             ->getCompleteLedgers();
 #endif

src/ripple/app/rdb/backend/RelationalDBInterfacePostgres.cpp

@@ -128,6 +128,9 @@ public:
     bool
     transactionDbHasSpace(Config const& config) override;
 
+    bool
+    isCaughtUp(std::string& reason) override;
+
 private:
     Application& app_;
     beast::Journal j_;
@@ -272,5 +275,24 @@ getRelationalDBInterfacePostgres(
     return std::make_unique<RelationalDBInterfacePostgresImp>(
         app, config, jobQueue);
 }
+bool
+RelationalDBInterfacePostgresImp::isCaughtUp(std::string& reason)
+{
+#ifdef RIPPLED_REPORTING
+    using namespace std::chrono_literals;
+    auto age = PgQuery(pgPool_)("SELECT age()");
+    if (!age || age.isNull())
+    {
+        reason = "No ledgers in database";
+        return false;
+    }
+    if (std::chrono::seconds{age.asInt()} > 3min)
+    {
+        reason = "No recently-published ledger";
+        return false;
+    }
+#endif
+    return true;
+}
 
 }  // namespace ripple

src/ripple/app/rdb/backend/RelationalDBInterfacePostgres.h

@@ -104,6 +104,18 @@ public:
      */
     virtual Transaction::Locator
     locateTransaction(uint256 const& id) = 0;
+
+    /**
+     * @brief      isCaughtUp returns whether the database is caught up with the
+     *             network
+     * @param[out] reason if the database is not caught up, reason contains a
+     *             helpful message describing why
+     * @return     false if the most recently written
+     *             ledger has a close time over 3 minutes ago, or if there are
+     *             no ledgers in the database. true otherwise
+     */
+    virtual bool
+    isCaughtUp(std::string& reason) = 0;
 };
 
 }  // namespace ripple