add http server files

lib/dunixir/create_bdd.ex

+defmodule CreateBDD do 
+
+    require Logger
+    
+    @base_url 'https://g1-test.duniter.org/blockchain/blocks/'
+  
+    @doc """
+    Create some of the needeed dets table after checking if they already exist
+    """
+    def create_if_not_created do 
+        if not File.dir?('data') do
+            File.mkdir('data')
+            :dets.open_file(:global_iindex , [{:file, 'data/global_iindex'} , {:type, :set}])
+            :dets.open_file(:global_bindex , [{:file, 'data/global_bindex'} , {:type, :set}])
+            :dets.open_file(:global_mindex , [{:file, 'data/global_mindex'} , {:type, :set}])
+            :dets.open_file(:global_cindex , [{:file, 'data/global_cindex'} , {:type, :set}])
+            :dets.open_file(:global_sindex , [{:file, 'data/global_sindex'} , {:type, :set}])
+            :dets.open_file(:block , [{:file, 'data/block'} , {:type, :set}])
+        else 
+            if not File.exists?('data/block') do
+                :dets.open_file(:block , [{:file, 'data/block'} , {:type, :set}])
+            end
+            if not File.exists?('data/global_iindex') do
+                :dets.open_file(:global_iindex , [{:file, 'data/global_iindex'} , {:type, :set}])
+            end
+            if not File.exists?('data/global_bindex') do
+                :dets.open_file(:global_bindex , [{:file, 'data/global_bindex'} , {:type, :set}])
+            end
+            if not File.exists?('data/global_sindex') do
+                :dets.open_file(:global_sindex , [{:file, 'data/global_sindex'} , {:type, :set}])
+            end
+            if not File.exists?('data/global_cindex') do
+                :dets.open_file(:global_cindex , [{:file, 'data/global_cindex'} , {:type, :set}])
+            end
+            if not File.exists?('data/global_mindex') do
+                :dets.open_file(:global_mindex , [{:file, 'data/global_mindex'} , {:type, :set}])
+            end
+        end
+    end
+
+    @doc """
+    Insert in the block dets table the n fisrt block of the bockchain, get throught an http request    """    
+    def fill_with_block(n) do
+        {:ok , :block} = :dets.open_file(:block , [{:file, 'data/block'} , {:type, :set}])
+        case :httpc.request(:get, {@base_url ++ to_charlist(n) ++ '/0', []}, [], []) do
+            {:ok, resp}        ->
+                Logger.info('data received')
+                case resp do
+                    {{_, 200, 'OK'}, _headers, '[]'}
+                        -> Logger.info('---DONE---')
+                    {{_, 200, 'OK'}, _headers, body}
+                        -> Poison.decode!(body) |> Enum.map( fn b -> :dets.insert(:block, { b["number"], b }) end)
+                    _ -> Logger.info('---Failed---')
+                end
+            end
+    end 
+
+
+end
\ No newline at end of file