page-relations.py - Forward-Backward-Relations
Forward-Backward-Relations by Numerical Suffixes
When slug without numerical suffix match, pages are not identical, share the language and
the numerical suffix differs exactly by 1, then the prequel and sequel fields are set.
This allows for a lateral navigation, as exemplified on this page.
# set prequel and sequel for pages below toplevel
for page in _all_pages():
if page.parent != None:
page_stripped_slug = page.slug.rstrip('0123456789')
if len(page.slug) != len(page_stripped_slug):
for sibbling_page in page.parent.children:
sibbling_stripped_slug = sibbling_page.slug.rstrip('0123456789')
if len(sibbling_page.slug) != len(sibbling_stripped_slug):
if sibbling_page != page and sibbling_page.lang == page.lang and sibbling_stripped_slug == page_stripped_slug:
page_number = int(page.slug[len(page_stripped_slug):].lstrip('0'))
sibbling_number = int(sibbling_page.slug[len(sibbling_stripped_slug):].lstrip('0'))
if page_number + 1 == sibbling_number:
page.sequel = sibbling_page
sibbling_page.prequel = page
Finally the complete list of prequels and sequels are computed. This would simplify go-first or go-last jumps.
# set list of prequels and sequels
for page in _all_pages():
a_prequel = page.prequel
while a_prequel:
page.prequels.insert(0, a_prequel)
a_prequel = a_prequel.prequel
a_sequel = page.sequel
while a_sequel:
page.sequels.insert(0, a_sequel)
a_sequel = a_sequel.sequel