feat(nodeinfo): extract and save NodeInfo information from instances to display it on instances list

We also try to detect the application actor if it's not given by NodeInfo metadata (FEP-2677)
(guessing for Mobilizon, PeerTube & Mastodon).

Closes #1392

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

test/federation/node_info_test.exs

@@ -8,6 +8,10 @@ defmodule Mobilizon.Federation.NodeInfoTest do
   @instance_domain "event-federation.eu"
   @nodeinfo_fixture_path "test/fixtures/nodeinfo/wp-event-federation.json"
   @nodeinfo_regular_fixture_path "test/fixtures/nodeinfo/regular.json"
+  @nodeinfo_both_versions_fixture_path "test/fixtures/nodeinfo/both_versions.json"
+  @nodeinfo_older_versions_fixture_path "test/fixtures/nodeinfo/older_versions.json"
+  @nodeinfo_data_fixture_path "test/fixtures/nodeinfo/data.json"
+  @nodeinfo_wp_data_fixture_path "test/fixtures/nodeinfo/wp-data.json"
 
   describe "getting application actor" do
     test "from wordpress event federation" do
@@ -57,4 +61,128 @@ defmodule Mobilizon.Federation.NodeInfoTest do
       assert nil == NodeInfo.application_actor(@instance_domain)
     end
   end
+
+  describe "getting informations" do
+    test "with both 2.0 and 2.1 endpoints" do
+      nodeinfo_end_point_data =
+        @nodeinfo_both_versions_fixture_path |> File.read!() |> Jason.decode!()
+
+      nodeinfo_data = @nodeinfo_data_fixture_path |> File.read!() |> Jason.decode!()
+
+      WebfingerClientMock
+      |> expect(:call, fn
+        %{
+          method: :get,
+          url: "https://mobilizon.fr/.well-known/nodeinfo"
+        },
+        _opts ->
+          {:ok, %Tesla.Env{status: 200, body: nodeinfo_end_point_data}}
+      end)
+
+      WebfingerClientMock
+      |> expect(:call, fn
+        %{
+          method: :get,
+          url: "https://mobilizon.fr/.well-known/nodeinfo/2.1"
+        },
+        _opts ->
+          {:ok, %Tesla.Env{status: 200, body: nodeinfo_data}}
+      end)
+
+      assert {:ok, data} = NodeInfo.nodeinfo("mobilizon.fr")
+      assert data["version"] == "2.1"
+      assert data["software"]["name"] == "Mobilizon"
+      # Added in 2.1
+      refute is_nil(data["software"]["repository"])
+    end
+
+    test "with only 2.0 endpoint" do
+      nodeinfo_end_point_data = @nodeinfo_regular_fixture_path |> File.read!() |> Jason.decode!()
+      nodeinfo_wp_data = @nodeinfo_wp_data_fixture_path |> File.read!() |> Jason.decode!()
+
+      WebfingerClientMock
+      |> expect(:call, fn
+        %{
+          method: :get,
+          url: "https://event-federation.eu/.well-known/nodeinfo"
+        },
+        _opts ->
+          {:ok, %Tesla.Env{status: 200, body: nodeinfo_end_point_data}}
+      end)
+
+      WebfingerClientMock
+      |> expect(:call, fn
+        %{
+          method: :get,
+          url: "https://event-federation.eu/wp-json/activitypub/1.0/nodeinfo"
+        },
+        _opts ->
+          {:ok, %Tesla.Env{status: 200, body: nodeinfo_wp_data}}
+      end)
+
+      assert {:ok, data} = NodeInfo.nodeinfo("event-federation.eu")
+      assert data["version"] == "2.0"
+      assert data["software"]["name"] == "wordpress"
+      # Added in 2.1
+      assert is_nil(data["software"]["repository"])
+    end
+
+    test "with no valid endpoint" do
+      nodeinfo_end_point_data =
+        @nodeinfo_older_versions_fixture_path |> File.read!() |> Jason.decode!()
+
+      WebfingerClientMock
+      |> expect(:call, fn
+        %{
+          method: :get,
+          url: "https://somewhere.tld/.well-known/nodeinfo"
+        },
+        _opts ->
+          {:ok, %Tesla.Env{status: 200, body: nodeinfo_end_point_data}}
+      end)
+
+      assert {:error, :no_node_info_endpoint_found} = NodeInfo.nodeinfo("somewhere.tld")
+    end
+
+    test "with no answer from well-known endpoint" do
+      WebfingerClientMock
+      |> expect(:call, fn
+        %{
+          method: :get,
+          url: "https://somewhere.tld/.well-known/nodeinfo"
+        },
+        _opts ->
+          {:ok, %Tesla.Env{status: 404}}
+      end)
+
+      assert {:error, :node_info_meta_http_error} = NodeInfo.nodeinfo("somewhere.tld")
+    end
+
+    test "with no answer from version endpoint" do
+      nodeinfo_end_point_data =
+        @nodeinfo_both_versions_fixture_path |> File.read!() |> Jason.decode!()
+
+      WebfingerClientMock
+      |> expect(:call, fn
+        %{
+          method: :get,
+          url: "https://mobilizon.fr/.well-known/nodeinfo"
+        },
+        _opts ->
+          {:ok, %Tesla.Env{status: 200, body: nodeinfo_end_point_data}}
+      end)
+
+      WebfingerClientMock
+      |> expect(:call, fn
+        %{
+          method: :get,
+          url: "https://mobilizon.fr/.well-known/nodeinfo/2.1"
+        },
+        _opts ->
+          {:ok, %Tesla.Env{status: 404}}
+      end)
+
+      assert {:error, :node_info_endpoint_http_error} = NodeInfo.nodeinfo("mobilizon.fr")
+    end
+  end
 end

test/fixtures/nodeinfo/both_versions.json

@@ -0,0 +1,12 @@
+{
+    "links": [
+        {
+            "rel": "http://nodeinfo.diaspora.software/ns/schema/2.0",
+            "href": "https://mobilizon.fr/.well-known/nodeinfo/2.0"
+        },
+        {
+            "rel": "http://nodeinfo.diaspora.software/ns/schema/2.1",
+            "href": "https://mobilizon.fr/.well-known/nodeinfo/2.1"
+        }
+    ]
+}

test/fixtures/nodeinfo/data.json

@@ -0,0 +1,29 @@
+{
+    "version": "2.1",
+    "protocols": [
+        "activitypub"
+    ],
+    "metadata": {
+        "nodeDescription": "Mobilizon.fr est l'instance Mobilizon de Framasoft.",
+        "nodeName": "Mobilizon"
+    },
+    "usage": {
+        "users": {
+            "total": 9204
+        },
+        "localComments": 3253,
+        "localPosts": 7545
+    },
+    "services": {
+        "outbound": [
+            "atom1.0"
+        ],
+        "inbound": []
+    },
+    "software": {
+        "name": "Mobilizon",
+        "version": "4.0.2",
+        "repository": "https://framagit.org/framasoft/mobilizon"
+    },
+    "openRegistrations": true
+}

test/fixtures/nodeinfo/older_versions.json

@@ -0,0 +1,8 @@
+{
+    "links": [
+        {
+            "rel": "http://nodeinfo.diaspora.software/ns/schema/1.1",
+            "href": "https://mobilizon.fr/.well-known/nodeinfo/1.1"
+        }
+    ]
+}

test/fixtures/nodeinfo/regular.json

@@ -1,8 +1,8 @@
 {
     "links": [
         {
-            "rel": "http:\/\/nodeinfo.diaspora.software\/ns\/schema\/2.0",
-            "href": "https:\/\/event-federation.eu\/wp-json\/activitypub\/1.0\/nodeinfo"
+            "rel": "http://nodeinfo.diaspora.software/ns/schema/2.0",
+            "href": "https://event-federation.eu/wp-json/activitypub/1.0/nodeinfo"
         }
     ]
 }

test/fixtures/nodeinfo/wp-data.json

@@ -0,0 +1,24 @@
+{
+    "version": "2.0",
+    "software": {
+        "name": "wordpress",
+        "version": "6.4.2"
+    },
+    "usage": {
+        "users": {
+            "total": 1,
+            "activeMonth": 1,
+            "activeHalfyear": 1
+        },
+        "localPosts": 3,
+        "localComments": 3
+    },
+    "openRegistrations": false,
+    "protocols": [
+        "activitypub"
+    ],
+    "services": {
+        "inbound": [],
+        "outbound": []
+    }
+}

test/fixtures/nodeinfo/wp-event-federation.json

@@ -1,8 +1,8 @@
 {
     "links": [
         {
-            "rel": "http:\/\/nodeinfo.diaspora.software\/ns\/schema\/2.0",
-            "href": "https:\/\/event-federation.eu\/wp-json\/activitypub\/1.0\/nodeinfo"
+            "rel": "http://nodeinfo.diaspora.software/ns/schema/2.0",
+            "href": "https://event-federation.eu/wp-json/activitypub/1.0/nodeinfo"
         },
         {
             "rel": "https://www.w3.org/ns/activitystreams#Application",