From 44757d932abac6c8346366dfa3c0fb94e5ee0d06 Mon Sep 17 00:00:00 2001
From: Christian Mollekopf <chrigi_1@fastmail.fm>
Date: Wed, 3 Dec 2014 20:36:37 +0100
Subject: dummyresource that doesn't work yet

---
 store/database.cpp | 27 ++++++++++++++++++++-------
 store/database.h   |  5 ++++-
 2 files changed, 24 insertions(+), 8 deletions(-)

(limited to 'store')

diff --git a/store/database.cpp b/store/database.cpp
index c16a077..7e2019e 100644
--- a/store/database.cpp
+++ b/store/database.cpp
@@ -63,7 +63,7 @@ void Database::write(const std::string &sKey, const std::string &sValue, MDB_txn
     }
 }
 
-void Database::read(const std::string &sKey)
+void Database::read(const std::string &sKey, const std::function<void(const std::string)> &resultHandler)
 {
     int rc;
     MDB_txn *txn;
@@ -76,13 +76,26 @@ void Database::read(const std::string &sKey)
 
     rc = mdb_txn_begin(env, NULL, MDB_RDONLY, &txn);
     rc = mdb_cursor_open(txn, dbi, &cursor);
-    // while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
-    if ((rc = mdb_cursor_get(cursor, &key, &data, MDB_SET)) == 0) {
-        const std::string resultKey(static_cast<char*>(key.mv_data), key.mv_size);
-        const std::string resultValue(static_cast<char*>(data.mv_data), data.mv_size);
-        // std::cout << "key: " << resultKey << " data: " << resultValue << std::endl;
+    if (sKey.empty()) {
+        std::cout << "Iterating over all values of store!" << std::endl;
+        while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
+            const std::string resultKey(static_cast<char*>(key.mv_data), key.mv_size);
+            const std::string resultValue(static_cast<char*>(data.mv_data), data.mv_size);
+            // std::cout << "key: " << resultKey << " data: " << resultValue << std::endl;
+            resultHandler(resultValue);
+        }
     } else {
-        std::cout << "couldn't find value " << sKey << std::endl;
+        if ((rc = mdb_cursor_get(cursor, &key, &data, MDB_SET)) == 0) {
+            const std::string resultKey(static_cast<char*>(key.mv_data), key.mv_size);
+            const std::string resultValue(static_cast<char*>(data.mv_data), data.mv_size);
+            // std::cout << "key: " << resultKey << " data: " << resultValue << std::endl;
+            resultHandler(resultValue);
+        } else {
+            std::cout << "couldn't find value " << sKey << std::endl;
+        }
+    }
+    if (rc) {
+        std::cerr << "mdb_cursor_get: " << rc << mdb_strerror(rc) << std::endl;
     }
     mdb_cursor_close(cursor);
     mdb_txn_abort(txn);
diff --git a/store/database.h b/store/database.h
index 1a124be..999a89e 100644
--- a/store/database.h
+++ b/store/database.h
@@ -1,3 +1,5 @@
+#pragma once
+
 #include <lmdb.h>
 #include <string>
 #include <QString>
@@ -9,7 +11,8 @@ public:
     MDB_txn *startTransaction();
     void endTransaction(MDB_txn *transaction);
     void write(const std::string &sKey, const std::string &sValue, MDB_txn *transaction);
-    void read(const std::string &sKey);
+    //Perhaps prefer iterators (assuming we need to be able to match multiple values
+    void read(const std::string &sKey, const std::function<void(const std::string)> &);
 
 private:
     MDB_env *env;
-- 
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