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Add prev/next buttons navigation support for individual items #1187

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32 changes: 32 additions & 0 deletions pycsw/ogc/api/records.py
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Original file line number Diff line number Diff line change
Expand Up @@ -948,6 +948,37 @@ def item(self, headers_, args, collection, item):
record = self.repository.query_ids([item])[0]
response = record2json(record, self.config['server']['url'],
collection, self.mode)
query = self.repository.session.query(
self.repository.dataset.identifier
).order_by(
self.repository.dataset.identifier
)

ids = [r[0] for r in query.all()]

if item in ids:
idx = ids.index(item)

prev_id = ids[idx - 1] if idx > 0 else None
next_id = ids[idx + 1] if idx < len(ids) - 1 else None

response.setdefault('links', [])

if prev_id:
response['links'].append({
'rel': 'prev',
'type': 'text/html',
'title': 'Previous item',
'href': f"{self.config['server']['url']}/collections/{collection}/items/{prev_id}?f=html"
})

if next_id:
response['links'].append({
'rel': 'next',
'type': 'text/html',
'title': 'Next item',
'href': f"{self.config['server']['url']}/collections/{collection}/items/{next_id}?f=html"
})
except IndexError:
distributed = str2bool(args.get('distributed', False))

Expand Down Expand Up @@ -977,6 +1008,7 @@ def item(self, headers_, args, collection, item):
if 'json' in headers_['Content-Type']:
headers_['Content-Type'] = 'application/geo+json'

print(response['links'])
return self.get_response(200, headers_, response, 'item.html')

def manage_collection_item(self, headers_, action='create', collection=None,
Expand Down
30 changes: 30 additions & 0 deletions pycsw/templates/item.html
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,14 @@
<a href="{{ config['server']['url'] }}/collections/{{ data['collection'] }}/items/{{ data['id'] }}">{{ data['id'] }}</a>
{% endblock %}
{% block body %}
{% set nav_links = namespace(prev=None, next=None) %}
{% for link in data['links'] %}
{% if link['rel'] == 'prev' %}
{% set nav_links.prev = link['href'] %}
{% elif link['rel'] == 'next' %}
{% set nav_links.next = link['href'] %}
{% endif %}
{% endfor %}

<section id="item">
<div class="container-fluid">
Expand Down Expand Up @@ -179,6 +187,28 @@ <h2>{{ data.get('properties',{}).get('title',data['id']) }}</h2>
{% endif %}
</tbody>
</table>
<div class="d-flex justify-content-between mt-2">
<div>
{% if nav_links.prev %}
<a href="{{ nav_links.prev }}">
<button type="button" class="btn btn-sm btn-primary">Prev</button>
</a>
{% else %}
<button type="button" class="btn btn-sm btn-primary" disabled>Prev</button>
{% endif %}
</div>

<div>
{% if nav_links.next %}
<a href="{{ nav_links.next }}">
<button type="button" class="btn btn-sm btn-primary">Next</button>
</a>
{% else %}
<button type="button" class="btn btn-sm btn-primary" disabled>Next</button>
{% endif %}
</div>

</div>
</div>
</div>
</div>
Expand Down