From 166aa563ad41c4566c02cff583df612e328d1520 Mon Sep 17 00:00:00 2001
From: Christian Mollekopf <chrigi_1@fastmail.fm>
Date: Mon, 20 Jul 2015 20:42:52 +0200
Subject: Deal with non-existing index

---
 common/index.cpp | 4 ++++
 common/index.h   | 4 ++++
 2 files changed, 8 insertions(+)

(limited to 'common')

diff --git a/common/index.cpp b/common/index.cpp
index 9bb467b..a8de697 100644
--- a/common/index.cpp
+++ b/common/index.cpp
@@ -17,6 +17,10 @@ void Index::add(const QByteArray &key, const QByteArray &value)
 void Index::lookup(const QByteArray &key, const std::function<void(const QByteArray &value)> &resultHandler,
                                           const std::function<void(const Error &error)> &errorHandler)
 {
+    if (!mStorage.exists()) {
+        errorHandler(Error("index", IndexNotAvailable, "Index not existing"));
+        return;
+    }
     mStorage.scan(key, [this, resultHandler](void *keyPtr, int keySize, void *valuePtr, int valueSize) -> bool {
         resultHandler(QByteArray(static_cast<char*>(valuePtr), valueSize));
         return true;
diff --git a/common/index.h b/common/index.h
index 3cd7cc8..08b499f 100644
--- a/common/index.h
+++ b/common/index.h
@@ -11,6 +11,10 @@
 class Index
 {
 public:
+    enum ErrorCodes {
+        IndexNotAvailable = -1
+    };
+
     class Error
     {
     public:
-- 
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