add "export alias" button

app/dashboard/templates/dashboard/setting.html

@@ -315,10 +315,23 @@
         <div class="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>
+
+        <div class="d-flex">
+          <div>
+            <form method="post">
+              <input type="hidden" name="form-name" value="export-data">
+              <button class="btn btn-outline-info">Export Data</button>
+            </form>
+          </div>
+          <div class="ml-5">
+            <form method="post">
+              <input type="hidden" name="form-name" value="export-alias">
+              <button class="btn btn-outline-primary">Export Aliases</button>
+            </form>
+          </div>
+        </div>
+
+
       </div>
     </div>
 

app/dashboard/views/setting.py

@@ -1,8 +1,17 @@
+import csv
 import json
-from io import BytesIO
+from io import BytesIO, StringIO
 
 import arrow
-from flask import render_template, request, redirect, url_for, flash, Response
+from flask import (
+    render_template,
+    request,
+    redirect,
+    url_for,
+    flash,
+    Response,
+    make_response,
+)
 from flask_login import login_required, current_user, logout_user
 from flask_wtf import FlaskForm
 from flask_wtf.file import FileField
@@ -270,6 +279,18 @@ def setting():
                 mimetype="text/json",
                 headers={"Content-Disposition": "attachment;filename=data.json"},
             )
+        elif request.form.get("form-name") == "export-alias":
+            data = [["alias", "note", "enabled"]]
+            for alias in Alias.filter_by(user_id=current_user.id).all():  # type: Alias
+                data.append([alias.email, alias.note, alias.enabled])
+
+            si = StringIO()
+            cw = csv.writer(si)
+            cw.writerows(data)
+            output = make_response(si.getvalue())
+            output.headers["Content-Disposition"] = "attachment; filename=aliases.csv"
+            output.headers["Content-type"] = "text/csv"
+            return output
 
     manual_sub = ManualSubscription.get_by(user_id=current_user.id)
     return render_template(