Implement received Webmention handling

Add the Flask application setup, database models and migrations,
authentication, and configuration for development and testing.

Implement asynchronous Webmention verification with Huey, including HTML
and plain-text source validation, retries, status tracking, and size
limits.

Add status, login, and paginated received-Webmention views together with
comprehensive tests for forms, views, and receiver tasks.

1 files changed, 69 insertions, 0 deletions

diff --git a/webmentions_ssg/templates/received.html b/webmentions_ssg/templates/received.html
new file mode 100644
index 0000000..ea74557
--- /dev/null
+++ b/webmentions_ssg/templates/received.html
@@ -0,0 +1,69 @@
+{% extends "base.html" %}
+{% from "bootstrap5/pagination.html" import render_pagination %}
+{% block content %}
+  <div class="d-flex justify-content-between align-items-center mb-3">
+    <h1 class="h3 mb-0">Received Webmentions</h1>
+    <span class="text-body-secondary">{{ webmentions.total }} total</span>
+  </div>
+  {% if webmentions.items %}
+    <div class="table-responsive">
+      <table class="table table-bordered table-striped table-hover align-middle">
+        <thead>
+          <tr>
+            <th scope="col">Status</th>
+            <th scope="col">Source</th>
+            <th scope="col">Target</th>
+            <th scope="col">Received</th>
+            <th scope="col">Updated</th>
+            <th scope="col">Reason</th>
+          </tr>
+        </thead>
+        <tbody>
+          {% for webmention in webmentions %}
+            {% if webmention.status == "verified" %}
+              {% set row_class = "table-success" %}
+              {% set display_status = "Verified" %}
+            {% elif webmention.status in ("received", "verifying") %}
+              {% set row_class = "table-warning" %}
+              {% set display_status = "Pending" %}
+            {% else %}
+              {% set row_class = "table-danger" %}
+              {% set display_status = "Declined" %}
+            {% endif %}
+            <tr class="{{ row_class }}">
+              <td>
+                <strong>{{ display_status }}</strong>
+              </td>
+              <td class="text-break">
+                <a href="{{ webmention.source }}">{{ webmention.source }}</a>
+              </td>
+              <td class="text-break">
+                <a href="{{ webmention.target }}">{{ webmention.target }}</a>
+              </td>
+              <td class="text-nowrap">
+                <time datetime="{{ webmention.created_at.isoformat() }}">
+                  {{ webmention.created_at.strftime("%Y-%m-%d %H:%M:%S") }}
+                </time>
+              </td>
+              <td class="text-nowrap">
+                <time datetime="{{ webmention.updated_at.isoformat() }}">
+                  {{ webmention.updated_at.strftime("%Y-%m-%d %H:%M:%S") }}
+                </time>
+              </td>
+              <td>{{ webmention.failure_reason or "—" }}</td>
+            </tr>
+          {% endfor %}
+        </tbody>
+      </table>
+    </div>
+    {% if webmentions.pages > 1 %}
+      <div class="mt-3">
+        {{ render_pagination(webmentions,
+                align="center",
+                size="sm") }}
+      </div>
+    {% endif %}
+  {% else %}
+    <p class="text-body-secondary">No Webmentions have been received yet.</p>
+  {% endif %}
+{% endblock %}