Refactoring

app/src/main/java/eu/faircode/email/AdapterMessage.java

@@ -3166,15 +3166,10 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                     args.putBoolean("has_amp", has_amp);
 
                     // Check for structured email
-                    // https://structured.email/content/introduction/getting_started.html
                     if (BuildConfig.DEBUG)
                         for (Element struct : document.select("script[type=application/ld+json]"))
                             try {
-                                JSONObject jstruct = new JSONObject(struct.html());
-                                document.body()
-                                        .appendElement("pre")
-                                        .attr("style", "font-size: smaller !important;")
-                                        .text(jstruct.toString(2));
+                                document.body().append(new StructuredEmail(struct.html()).getHtml());
                             } catch (Throwable ex) {
                                 Log.w(ex);
                             }

app/src/main/java/eu/faircode/email/StructuredEmail.java

@@ -0,0 +1,43 @@
+package eu.faircode.email;
+
+/*
+    This file is part of FairEmail.
+
+    FairEmail is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    FairEmail is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with FairEmail.  If not, see <http://www.gnu.org/licenses/>.
+
+    Copyright 2018-2023 by Marcel Bokhorst (M66B)
+*/
+
+import org.json.JSONException;
+import org.json.JSONObject;
+import org.jsoup.nodes.Document;
+
+// https://structured.email/content/introduction/getting_started.html
+// https://schema.org/FlightReservation
+
+public class StructuredEmail {
+    private JSONObject jroot;
+
+    public StructuredEmail(String json) throws JSONException {
+        jroot = new JSONObject(json);
+    }
+
+    public String getHtml() throws JSONException {
+        Document d = Document.createShell("");
+        d.appendElement("pre")
+                .attr("style", "font-size: smaller !important;")
+                .text(jroot.toString(2));
+        return d.html();
+    }
+}