From f2c049265ed5078538f4bc84c7b0498258e59ac2 Mon Sep 17 00:00:00 2001
From: alfredo <oxarbitrage@gmail.com>
Date: Tue, 31 Jan 2017 18:01:57 -0300
Subject: [PATCH] Asset API Added 2 functions

---
 libraries/app/api.cpp                      | 37 ++++++++++++++++++++++
 libraries/app/include/graphene/app/api.hpp | 12 ++++++-
 2 files changed, 48 insertions(+), 1 deletion(-)

diff --git a/libraries/app/api.cpp b/libraries/app/api.cpp
index 47d07289..40aa7b97 100644
--- a/libraries/app/api.cpp
+++ b/libraries/app/api.cpp
@@ -611,5 +611,42 @@ namespace graphene { namespace app {
 
       return result;
     }
+    // get number of asset holders.
+    int asset_api::get_asset_holders_count( asset_id_type asset_id ) const {
+
+      const auto& bal_idx = _db.get_index_type< account_balance_index >().indices().get< by_asset_balance >();
+      auto range = bal_idx.equal_range( boost::make_tuple( asset_id ) );
+            
+      int count = boost::distance(range) - 1;
+
+      return count;
+    }
+    // function to get vector of system assets with holders count.
+    vector<asset_holders> asset_api::get_all_asset_holders() const {
+            
+      vector<asset_holders> result;
+            
+      vector<asset_id_type> total_assets;
+      for( const asset_object& asset_obj : _db.get_index_type<asset_index>().indices() )
+      {
+        const auto& dasset_obj = asset_obj.dynamic_asset_data_id(_db);
+
+        asset_id_type asset_id;
+        asset_id = dasset_obj.id;
+
+        const auto& bal_idx = _db.get_index_type< account_balance_index >().indices().get< by_asset_balance >();
+        auto range = bal_idx.equal_range( boost::make_tuple( asset_id ) );
+
+        int count = boost::distance(range) - 1;
+                
+        asset_holders ah;
+        ah.asset_id       = asset_id;
+        ah.count     = count;
+
+        result.push_back(ah);
+      }
+
+      return result;
+    }
 
 } } // graphene::app
diff --git a/libraries/app/include/graphene/app/api.hpp b/libraries/app/include/graphene/app/api.hpp
index bc629ea2..be0e0a23 100644
--- a/libraries/app/include/graphene/app/api.hpp
+++ b/libraries/app/include/graphene/app/api.hpp
@@ -77,7 +77,12 @@ namespace graphene { namespace app {
       account_id_type account_id;
       share_type      amount;
    };
-
+   struct asset_holders
+   {
+      asset_id_type   asset_id;
+      int             count;
+   };
+   
    /**
     * @brief The history_api class implements the RPC API for account history
     *
@@ -285,6 +290,8 @@ namespace graphene { namespace app {
          ~asset_api();
 
          vector<account_asset_balance> get_asset_holders( asset_id_type asset_id )const;
+         int get_asset_holders_count( asset_id_type asset_id )const;
+         vector<asset_holders> get_all_asset_holders() const;
 
       private:
          graphene::chain::database& _db;
@@ -355,6 +362,7 @@ FC_REFLECT( graphene::app::verify_range_proof_rewind_result,
 //FC_REFLECT_TYPENAME( fc::ecc::commitment_type );
 
 FC_REFLECT( graphene::app::account_asset_balance, (name)(account_id)(amount) );
+FC_REFLECT( graphene::app::asset_holders, (asset_id)(count) );
 
 FC_API(graphene::app::history_api,
        (get_account_history)
@@ -392,6 +400,8 @@ FC_API(graphene::app::crypto_api,
      )
 FC_API(graphene::app::asset_api,
        (get_asset_holders)
+	   (get_asset_holders_count)
+       (get_all_asset_holders)
      )
 FC_API(graphene::app::login_api,
        (login)