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/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",