Allow to filter parties by country

src/lanpartydb_website/blueprints/base/templates/layout/base.html

@@ -22,6 +22,7 @@
           <ol>
             <li><a class="nav-item" href="{{ url_for('party.index') }}">{{ _('Parties') }}</a></li>
             <li><a class="nav-item" href="{{ url_for('series.index') }}">{{ _('Series') }}</a></li>
+            <li><a class="nav-item" href="{{ url_for('party.index_countries') }}">{{ _('Countries') }}</a></li>
           </ol>
         </nav>
     </section>

src/lanpartydb_website/blueprints/homepage/templates/homepage/index.html

@@ -18,8 +18,10 @@
       </a>
     </div>
     <div class="column text--centered">
-      <div class="bignumber">{{ country_count }}</div>
-      <div class="bignumber-caption">countries</div>
+      <a href="{{ url_for('party.index_countries') }}">
+        <div class="bignumber">{{ country_count }}</div>
+        <div class="bignumber-caption">countries</div>
+      </a>
     </div>
     <div class="column text--centered">
       <div class="bignumber">0</div>

src/lanpartydb_website/blueprints/party/templates/party/index_by_country.html

@@ -0,0 +1,22 @@
+{% extends 'layout/base.html' %}
+
+{% block body %}
+
+<div class="breadcrumbs"><a href="{{ url_for('.index_countries') }}">{{ 'Countries' }}</a> /</div>
+<h1>{{ country.flag }} {{ country.name }} <small>{{ pagination.total }}</small></h1>
+
+<div class="block">
+{{ pagination.links }}
+</div>
+
+{% include 'party/_list.html' %}
+
+<div class="block text--centered">
+{{ pagination.info }}
+</div>
+
+<div class="block">
+{{ pagination.links }}
+</div>
+
+{%- endblock %}

src/lanpartydb_website/blueprints/party/templates/party/index_countries.html

@@ -0,0 +1,25 @@
+{% extends 'layout/base.html' %}
+
+{% block body %}
+
+<h1>{{ _('Countries') }} <small>{{ countries_with_party_count|length }}</small></h1>
+
+<table class="table--index is-centered-h">
+  <thead>
+    <tr>
+      <th colspan="2">{{ _('Country') }}</th>
+      <th class="number">{{ _('Parties') }}</th>
+    </tr>
+  </thead>
+  <tbody>
+    {%- for country, party_count in countries_with_party_count|sort(attribute='0.name') %}
+    <tr>
+      <td>{{ country.flag }}</td>
+      <td><a href="{{ url_for('party.index_by_country', country_code=country.alpha_2.lower()) }}">{{ country.name }}</a></td>
+      <td class="number">{{ party_count }}</td>
+    </tr>
+    {%- endfor %}
+  </tbody>
+</table>
+
+{%- endblock %}

src/lanpartydb_website/blueprints/party/views.py

@@ -6,6 +6,8 @@
 :License: MIT
 """
 
+from collections import Counter
+
 from flask import abort, current_app, request
 from flask_paginate import Pagination
 from lanpartydb.models import Party
@@ -26,7 +28,7 @@ def index(page: int):
     per_page = request.args.get('per_page', type=int, default=50)
     offset = (page - 1) * per_page
 
-    parties = list(current_app.parties_by_slug.values())
+    parties = _get_parties()
     parties.sort(key=lambda party: party.start_on, reverse=True)
 
     pagination = Pagination(page=page, per_page=per_page, total=len(parties))
@@ -40,6 +42,54 @@ def index(page: int):
     }
 
 
+@blueprint.get('/-/by-country/')
+@templated
+def index_countries():
+    counter = Counter()
+    for party in _get_parties():
+        if party.location:
+            counter[party.location.country_code] += 1
+
+    country_codes_with_party_count = list(counter.items())
+
+    countries_with_party_count = [
+        (_find_country(country_code), party_count)
+        for country_code, party_count in country_codes_with_party_count
+    ]
+
+    return {
+        'countries_with_party_count': countries_with_party_count,
+    }
+
+
+@blueprint.get('/-/by-country/<country_code>/', defaults={'page': 1})
+@blueprint.get('/-/by-country/<country_code>/pages/<int:page>/')
+@templated
+def index_by_country(country_code: str, page: int):
+    country = _find_country(country_code)
+
+    per_page = request.args.get('per_page', type=int, default=50)
+    offset = (page - 1) * per_page
+
+    parties = _get_parties()
+    parties = filter(
+        lambda party: _find_party_country_code(party) == country.alpha_2.lower(),
+        parties,
+    )
+    parties = list(sorted(parties, key=lambda party: party.start_on, reverse=True))
+
+    pagination = Pagination(page=page, per_page=per_page, total=len(parties))
+
+    parties_slice = parties[offset : offset + per_page]
+
+    return {
+        'country': country,
+        'parties': parties_slice,
+        'pagination': pagination,
+        'countries': countries,
+    }
+
+
 @blueprint.get('/<slug>/')
 @templated
 def view(slug: str):
@@ -49,7 +99,7 @@ def view(slug: str):
 
     series = current_app.series_by_slug.get(party.series_slug)
 
-    country = _get_country(party)
+    country = _find_party_country(party)
 
     return {
         'party': party,
@@ -58,8 +108,24 @@ def view(slug: str):
     }
 
 
-def _get_country(party: Party) -> Country | None:
+def _get_parties() -> list[Party]:
+    return list(current_app.parties_by_slug.values())
+
+
+def _find_party_country_code(party: Party) -> str | None:
     if not party.location:
         return None
 
-    return countries.get(alpha_2=party.location.country_code)
+    return party.location.country_code
+
+
+def _find_party_country(party: Party) -> Country | None:
+    country_code = _find_party_country_code(party)
+    if not country_code:
+        return None
+
+    return _find_country(country_code)
+
+
+def _find_country(country_code: str) -> Country | None:
+    return countries.get(alpha_2=country_code)