ssb: Make blocks begin to do something.

src/ssb.db.c

@@ -2918,3 +2918,21 @@ void tf_ssb_db_remove_block(sqlite3* db, const char* id)
 		sqlite3_finalize(statement);
 	}
 }
+
+bool tf_ssb_db_is_blocked(sqlite3* db, const char* id)
+{
+	bool is_blocked = false;
+	sqlite3_stmt* statement = NULL;
+	if (sqlite3_prepare_v2(db, "SELECT 1 FROM blocks WHERE id = ?", -1, &statement, NULL) == SQLITE_OK)
+	{
+		if (sqlite3_bind_text(statement, 1, id, -1, NULL) == SQLITE_OK)
+		{
+			if (sqlite3_step(statement) == SQLITE_ROW)
+			{
+				is_blocked = true;
+			}
+		}
+		sqlite3_finalize(statement);
+	}
+	return is_blocked;
+}