From d4798b7223ef176756b9bd9c9c3ee2899a648f2e Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Fri, 1 Nov 2019 21:04:24 +0300
Subject: [PATCH] Find by contract name

---
 .../block_scout_web/controllers/chain_controller.ex | 13 +++++++++++--
 apps/explorer/lib/explorer/chain.ex                 | 13 +++++++++++++
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/apps/block_scout_web/lib/block_scout_web/controllers/chain_controller.ex b/apps/block_scout_web/lib/block_scout_web/controllers/chain_controller.ex
index 936d3ab0a0..037979155c 100644
--- a/apps/block_scout_web/lib/block_scout_web/controllers/chain_controller.ex
+++ b/apps/block_scout_web/lib/block_scout_web/controllers/chain_controller.ex
@@ -58,12 +58,21 @@ defmodule BlockScoutWeb.ChainController do
     if term == "" do
       json(conn, "{}")
     else
-      result =
+      result_tokens =
         term
         |> String.trim()
         |> Chain.search_token()
 
-      json(conn, result)
+      if result_tokens do
+        json(conn, result_tokens)
+      else
+        result_contracts =
+          term
+          |> String.trim()
+          |> Chain.search_contract()
+
+        json(conn, result_contracts)
+      end
     end
   end
 
diff --git a/apps/explorer/lib/explorer/chain.ex b/apps/explorer/lib/explorer/chain.ex
index 278317b8e7..f65b709ea0 100644
--- a/apps/explorer/lib/explorer/chain.ex
+++ b/apps/explorer/lib/explorer/chain.ex
@@ -850,6 +850,19 @@ defmodule Explorer.Chain do
     Repo.all(query)
   end
 
+  @spec search_contract(String.t()) :: [SmartContract.t()]
+  def search_contract(word) do
+    term = String.replace(word, ~r/\W/u, "") <> ":*"
+
+    query =
+      from(token in SmartContract,
+        where: fragment("to_tsvector('english', name ) @@ to_tsquery(?)", ^term),
+        limit: 5
+      )
+
+    Repo.all(query)
+  end
+
   @doc """
   Converts `t:Explorer.Chain.Address.t/0` `hash` to the `t:Explorer.Chain.Address.t/0` with that `hash`.