User can export their data

app/dashboard/templates/dashboard/setting.html

@@ -57,6 +57,16 @@
       <button class="btn btn-outline-primary">Change password</button>
     </form>
 
+    <hr>
+    <h3 class="mb-0">Export Data</h3>
+    <div class="small-text mb-3">
+      You can download all aliases you have created on SimpleLogin along with other data.
+    </div>
+    <form method="post">
+      <input type="hidden" name="form-name" value="export-data">
+      <button class="btn btn-outline-info">Export Data</button>
+    </form>
+
     <hr>
     <h3 class="mb-0">Delete Account</h3>
     <div class="small-text mb-3">Please note that this operation is irreversible.

app/dashboard/views/setting.py

@@ -1,7 +1,8 @@
+import json
 from io import BytesIO
 
 import arrow
-from flask import render_template, request, redirect, url_for, flash
+from flask import render_template, request, redirect, url_for, flash, Response
 from flask_login import login_required, current_user, logout_user
 from flask_wtf import FlaskForm
 from flask_wtf.file import FileField
@@ -20,6 +21,8 @@ from app.models import (
     User,
     GenEmail,
     DeletedAlias,
+    CustomDomain,
+    Client,
 )
 from app.utils import random_string
 
@@ -118,6 +121,34 @@ def setting():
             logout_user()
             return redirect(url_for("auth.register"))
 
+        elif request.form.get("form-name") == "export-data":
+            data = {
+                "email": current_user.email,
+                "name": current_user.name,
+                "aliases": [],
+                "apps": [],
+                "custom_domains": [],
+            }
+
+            for alias in GenEmail.filter_by(
+                user_id=current_user.id
+            ).all():  # type: GenEmail
+                data["aliases"].append(dict(email=alias.email, enabled=alias.enabled))
+
+            for custom_domain in CustomDomain.filter_by(user_id=current_user.id).all():
+                data["custom_domains"].append(custom_domain.domain)
+
+            for app in Client.filter_by(user_id=current_user.id):  # type: Client
+                data["apps"].append(
+                    dict(name=app.name, home_url=app.home_url, published=app.published)
+                )
+
+            return Response(
+                json.dumps(data),
+                mimetype="text/json",
+                headers={"Content-Disposition": "attachment;filename=data.json"},
+            )
+
         return redirect(url_for("dashboard.setting"))
 
     return render_template(