From 0df5c54166c3e695d1ef151378fa632281514554 Mon Sep 17 00:00:00 2001
From: Miguel Freitas <miguel@mf.site>
Date: Tue, 1 Oct 2013 08:57:51 -0300
Subject: [PATCH] promoted posts implemented

---
 src/main.cpp    | 14 +++++++++++++-
 src/twister.cpp | 35 +++++++++++++++++++++++++++++++++++
 src/twister.h   |  2 ++
 3 files changed, 50 insertions(+), 1 deletion(-)

diff --git a/src/main.cpp b/src/main.cpp
index 9f9103cd..a147f4a1 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -12,6 +12,9 @@
 #include "ui_interface.h"
 #include "checkqueue.h"
 #include "chainparams.h"
+
+#include "twister.h"
+
 #include <boost/algorithm/string/replace.hpp>
 #include <boost/filesystem.hpp>
 #include <boost/filesystem/fstream.hpp>
@@ -65,7 +68,7 @@ int64 nHPSTimerStart = 0;
 // Settings
 int64 nTransactionFee = 0;
 
-string strSpamMessage = "spam message test [en]";
+string strSpamMessage = "Promoted posts are needed to run the network infrastructure. If you want to help, start generating blocks and advertise. [en]";
 string strSpamUser = "nobody"; // [MF] FIXME: authenticy check needed
 
 
@@ -1657,6 +1660,15 @@ bool ProcessBlock(CValidationState &state, CNode* pfrom, CBlock* pblock, CDiskBl
     }
 
     printf("ProcessBlock: ACCEPTED\n");
+    if( pblock->vtx[0].IsSpamMessage() ) {
+        string msg = pblock->vtx[0].message.ExtractPushDataString(0);
+        string user = pblock->vtx[0].userName.ExtractPushDataString(0);
+        // [MF] FIXME: validate user properly
+        if( msg.length() <= 140 ) {
+            printf("ProcessBlock: msg='%s' user='%s'\n", msg.c_str(), user.c_str());
+            receivedSpamMessage(msg, user);
+        }
+    }
     return true;
 }
 
diff --git a/src/twister.cpp b/src/twister.cpp
index 7865e3eb..5f286c8c 100644
--- a/src/twister.cpp
+++ b/src/twister.cpp
@@ -41,6 +41,9 @@ static map<sha1_hash, alert_manager*> m_dhtgetMap;
 static map<std::string, bool> m_specialResources;
 static map<std::string, torrent_handle> m_userTorrent;
 static std::set<std::string> m_following;
+static std::string preferredSpamLang = "[en]";
+static std::string receivedSpamMsgStr;
+static std::string receivedSpamUserStr;
 
 sha1_hash dhtTargetHash(std::string const &username, std::string const &resource, std::string const &type)
 {
@@ -715,6 +718,16 @@ int getBestHeight()
     return nBestHeight;
 }
 
+void receivedSpamMessage(std::string const &message, std::string const &user)
+{
+    if( !receivedSpamMsgStr.length() ||
+         (preferredSpamLang.length() && message.find(preferredSpamLang) != string::npos) ) {
+        receivedSpamMsgStr = message;
+        receivedSpamUserStr = user;
+    }
+}
+
+
 Value dhtput(const Array& params, bool fHelp)
 {
     if (fHelp || params.size() < 5 || params.size() > 6)
@@ -1020,6 +1033,28 @@ Value getposts(const Array& params, bool fHelp)
         ret.push_back( entryToJson(rit->second) );
     }
 
+    if( receivedSpamMsgStr.length() ) {
+        // we must agree on an acceptable level here
+        if( rand() < (RAND_MAX/10) ) {
+            entry v;
+            entry &userpost = v["userpost"];
+
+            userpost["n"] = receivedSpamUserStr;
+            userpost["k"] = 1;
+            userpost["time"] = GetAdjustedTime();
+            userpost["height"] = getBestHeight();
+
+            userpost["msg"] = receivedSpamMsgStr;
+
+            unsigned char vchSig[65];
+            RAND_bytes(vchSig,sizeof(vchSig));
+            v["sig_userpost"] = std::string((const char *)vchSig, sizeof(vchSig));
+            ret.insert(ret.begin(),entryToJson(v));
+        }
+        receivedSpamMsgStr = "";
+        receivedSpamUserStr = "";
+    }
+
     return ret;
 }
 
diff --git a/src/twister.h b/src/twister.h
index e75cf3f1..21c10b7e 100644
--- a/src/twister.h
+++ b/src/twister.h
@@ -25,6 +25,8 @@ bool verifySignature(std::string const &strMessage, std::string const &strUserna
 bool acceptSignedPost(char const *data, int data_size, std::string username, int seq, std::string &errmsg, boost::uint32_t *flags);
 bool validatePostNumberForUser(std::string const &username, int k);
 
+void receivedSpamMessage(std::string const &message, std::string const &user);
+
 int getBestHeight();
 
 #endif // TWISTER_H