Add metatags to the Address page

apps/block_scout_web/lib/block_scout_web/templates/address/_metatags.html.eex

@@ -0,0 +1,15 @@
+<%= if assigns[:address] do %>
+  <title>
+    <%= gettext(
+          "%{address} - %{subnetwork} Explorer",
+          address: BlockScoutWeb.AddressView.address_page_title(@address),
+          subnetwork: LayoutView.subnetwork_title()
+        ) %>
+  </title>
+  <meta name="description" content="<%= gettext "View the account balance, transactions, and other data for %{address} on the %{network}", address: to_string(@address), network: LayoutView.network_title() %>">
+  <meta name="keywords" content="<%= BlockScoutWeb.AddressView.address_page_title(@address) <> ", " <> Explorer.coin() <> ", "<> LayoutView.network_title() %>">
+<% else %>
+  <title>
+    <%= gettext "Top Accounts - %{subnetwork} Explorer", subnetwork: LayoutView.subnetwork_title() %>
+  </title>
+<% end %>

apps/block_scout_web/lib/block_scout_web/templates/address/overview.html.eex

@@ -23,7 +23,7 @@
             <% end %>
             <span class="mr-4 mb-2">
               <span data-selector="transaction-count">
-                <%= Cldr.Number.to_string!(@transaction_count, format: "#,###") %>    
+                <%= Cldr.Number.to_string!(@transaction_count, format: "#,###") %>
               </span> <%= gettext("Transactions") %>
               <%= if validator?(@validation_count) do %>
                 <span data-selector="validation-count">

apps/block_scout_web/lib/block_scout_web/templates/address_contract/_metatags.html.eex

@@ -0,0 +1 @@
+<%= render BlockScoutWeb.AddressView, "_metatags.html", conn: @conn, address: @address %>

apps/block_scout_web/lib/block_scout_web/templates/address_internal_transaction/_metatags.html.eex

@@ -0,0 +1 @@
+<%= render BlockScoutWeb.AddressView, "_metatags.html", conn: @conn, address: @address %>

apps/block_scout_web/lib/block_scout_web/templates/address_read_contract/_metatags.html.eex

@@ -0,0 +1 @@
+<%= render BlockScoutWeb.AddressView, "_metatags.html", conn: @conn, address: @address %>

apps/block_scout_web/lib/block_scout_web/templates/address_token/_metatags.html.eex

@@ -0,0 +1 @@
+<%= render BlockScoutWeb.AddressView, "_metatags.html", conn: @conn, address: @address %>

apps/block_scout_web/lib/block_scout_web/templates/address_token_transfer/_metatags.html.eex

@@ -0,0 +1 @@
+<%= render BlockScoutWeb.AddressView, "_metatags.html", conn: @conn, address: @address %>

apps/block_scout_web/lib/block_scout_web/templates/address_transaction/_metatags.html.eex

@@ -0,0 +1 @@
+<%= render BlockScoutWeb.AddressView, "_metatags.html", conn: @conn, address: @address %>

apps/block_scout_web/lib/block_scout_web/templates/address_validation/_metatags.html.eex

@@ -0,0 +1 @@
+<%= render BlockScoutWeb.AddressView, "_metatags.html", conn: @conn, address: @address %>

apps/block_scout_web/lib/block_scout_web/views/address_view.ex

@@ -3,6 +3,7 @@ defmodule BlockScoutWeb.AddressView do
 
   alias Explorer.Chain
   alias Explorer.Chain.{Address, Hash, InternalTransaction, SmartContract, Token, TokenTransfer, Transaction, Wei}
+  alias BlockScoutWeb.LayoutView
 
   @dialyzer :no_match
 
@@ -231,4 +232,12 @@ defmodule BlockScoutWeb.AddressView do
 
     "0x" <> short_address
   end
+
+  def address_page_title(address) do
+    cond do
+      smart_contract_verified?(address) -> "#{address.smart_contract.name} (#{to_string(address)})"
+      contract?(address) -> "Contract #{to_string(address)}"
+      true -> "#{to_string(address)}"
+    end
+  end
 end

apps/block_scout_web/test/block_scout_web/views/address_view_test.exs

@@ -316,4 +316,25 @@ defmodule BlockScoutWeb.AddressViewTest do
       assert String.length(short_hash) == 6
     end
   end
+
+  describe "address_page_title/1" do
+    test "uses the Smart Contract name when the contract is verified" do
+      smart_contract = build(:smart_contract, name: "POA")
+      address = build(:address, smart_contract: smart_contract)
+
+      assert AddressView.address_page_title(address) == "POA (#{address.hash})"
+    end
+
+    test "uses the string 'Contract' when it's a contract" do
+      address = build(:contract_address, smart_contract: nil)
+
+      assert AddressView.address_page_title(address) == "Contract #{address.hash}"
+    end
+
+    test "uses the address hash when it is not a contract" do
+      address = build(:address, smart_contract: nil)
+
+      assert AddressView.address_page_title(address) == "#{address.hash}"
+    end
+  end
 end