user can set client.referral

app/developer/templates/developer/client_details/base.html

@@ -27,6 +27,13 @@
           <span class="icon mr-3"><i class="fe fe-shield"></i></span>OAuth Endpoints
         </a>
 
+        {% if current_user.referrals|count > 0 %}
+        <a href="{{ url_for('developer.client_detail_referral', client_id=client.id) }}"
+           class="list-group-item list-group-item-action {{ 'active' if client_details_page == 'referral' }}">
+          <span class="icon mr-3"><i class="fe fe-share"></i></span>Referral
+        </a>
+        {% endif %}
+
         <a href="{{ url_for('developer.client_detail_advanced', client_id=client.id) }}"
            class="list-group-item list-group-item-action {{ 'active' if client_details_page == 'advanced' }}">
           <span class="icon mr-3"><i class="fe fe-alert-octagon"></i></span>Danger

app/developer/templates/developer/client_details/referral.html

@@ -0,0 +1,28 @@
+{% extends 'developer/client_details/base.html' %}
+
+{% set client_details_page = "referral" %}
+
+{% block client_details_content %}
+  <h1 class="h2">Referral</h1>
+  <div class="">
+    If you are in the <a href="{{ url_for('dashboard.referral_route') }}">referral</a> program, you can attach a
+    referral to this website.
+    Any SimpleLogin sign up thanks to the SIWSL on your website will be counted towards this referral.
+  </div>
+  <form method="post" class="mt-3">
+    <div class="form-group">
+      <label class="form-label" for="client-select">Referral</label>
+      <select class="form-control" name="referral-id" id="client-select">
+        {% for referral in current_user.referrals %}
+          <option value="{{ referral.id }}"
+              {% if client.referral_id == referral.id %} selected {% endif %}>{{ referral.name }}</option>
+        {% endfor %}
+        {% if client.referral_id is none %}
+          <option value="" selected>No referral selected</option>
+        {% endif %}
+      </select>
+    </div>
+    <input type="submit" class="btn btn-primary" value="Update">
+
+  </form>
+{% endblock %}

app/developer/views/client_detail.py

@@ -12,7 +12,7 @@ from app.db import Session
 from app.developer.base import developer_bp
 from app.email_utils import send_email
 from app.log import LOG
-from app.models import Client, RedirectUri, File
+from app.models import Client, RedirectUri, File, Referral
 from app.utils import random_string
 
 
@@ -189,3 +189,34 @@ def client_detail_advanced(client_id):
     return render_template(
         "developer/client_details/advanced.html", form=form, client=client
     )
+
+
+@developer_bp.route("/clients/<client_id>/referral", methods=["GET", "POST"])
+@login_required
+def client_detail_referral(client_id):
+    client = Client.get(client_id)
+    if not client:
+        flash("no such app", "warning")
+        return redirect(url_for("developer.index"))
+
+    if client.user_id != current_user.id:
+        flash("you cannot see this app", "warning")
+        return redirect(url_for("developer.index"))
+
+    if request.method == "POST":
+        referral_id = request.form.get("referral-id")
+        if not referral_id:
+            flash("A referral must be selected", "error")
+            return redirect(request.url)
+
+        referral = Referral.get(referral_id)
+
+        if not referral or referral.user_id != current_user.id:
+            flash("something went wrong, refresh the page", "error")
+            return redirect(request.url)
+
+        client.referral_id = referral.id
+        Session.commit()
+        flash(f"Referral {referral.name} is now attached to {client.name}", "success")
+
+    return render_template("developer/client_details/referral.html", client=client)