Blog: Check if blog_archive_prev/next exist before showing link

Also minor cleanup of the classes and excessive indenting.

src/templates/nodes/custom/blog/_macros.pug

@@ -64,13 +64,14 @@ a.btn.btn-default.button-create(href="{{url_for('nodes.posts_create', project_id
 
 | {% for node in posts[1:] %}
 | {% if loop.first %}
-h4.blog_index-title Blasts from the past
+.blog-archive-navigation
+	span Blasts from the past
 | {% endif %}
 | {{ render_blog_list_item(node) }}
 | {% endfor %}
 
 | {% if more_posts_available %}
-h4.blog_index-title.blog-archive
+.blog-archive-navigation
 	a(href="{{ project.blog_archive_url }}")
 		| {{posts_meta.total - posts|length}} more blog posts over here
 		i.pi-angle-right
@@ -84,22 +85,36 @@ h4.blog_index-title.blog-archive
 | {% endif %} {# posts #}
 | {% endmacro %}
 
-//- ******************************************************* -//
 
+//- Macro for rendering the navigation buttons for prev/next pages -//
 | {% macro render_archive_pagination(project) %}
-h4.blog_index-title.blog-archive
-	a(class="{% if not project.blog_archive_prev %}disabled{% endif %}",
+.blog-archive-navigation
+	| {% if project.blog_archive_prev %}
+	a.archive-nav-button(
 		href="{{ project.blog_archive_prev }}", rel="prev")
 		i.pi-angle-left
 		| Previous page
+	| {% else %}
+	span.archive-nav-button
+		i.pi-angle-left
+		| Previous page
+	| {% endif %}
 
-	a(href="{{ url_for('main.project_blog', project_url=project.url) }}", rel="prev")
+	a.archive-nav-button(
+		href="{{ url_for('main.project_blog', project_url=project.url) }}")
 		| Blog Index
 
-	a(class="{% if not project.blog_archive_next %}disabled{% endif %}",
+	| {% if project.blog_archive_next %}
+	a.archive-nav-button(
 		href="{{ project.blog_archive_next }}", rel="next")
 		| Next page
 		i.pi-angle-right
+	| {% else %}
+	span.archive-nav-button
+		| Next page
+		i.pi-angle-right
+	| {% endif %}
+
 | {% endmacro %}
 
 | {% macro render_archive(project, posts, posts_meta) %}