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#!/usr/bin/env python3
from rdflib import URIRef, BNode, Literal, Graph, Namespace
from rdflib.namespace import RDF, NamespaceManager
from urllib.parse import urlparse
import sys
from itertools import chain
def first (it):
try:
return next (it)
except StopIteration:
return None
def humanList (l):
if len (l) == 0:
return ''
elif len (l) == 1:
return l[0]
else:
return ', '.join (l[:-1]) + ' and ' + l[-1]
def formatDomain (url):
d = urlparse (url).hostname
if d.startswith ('www.'):
d = d[4:]
return d
def formatPerson (s, g, n):
firstname = first (g.objects (n, s.givenName))
familyname = first (g.objects (n, s.familyName))
if firstname:
return '{} {}'.format (firstname, familyname)
else:
return familyname
def formatParent (s, g, n, useName = True):
ret = []
if useName:
parentname = first (g.objects (n, s.name))
if parentname:
ret.append (parentname)
volume = first (g.objects (n, s.volumeNumber))
if volume:
ret.append ('volume {}'.format (volume))
issue = first (g.objects (n, s.issueNumber))
if issue:
ret.append ('issue {}'.format (issue))
# pages
start = first (g.objects (n, s.pageStart))
end = first (g.objects (n, s.pageEnd))
if start:
try:
num = int (end)-int (start)
except (ValueError, TypeError):
num = 1
if end and num >= 1:
ret.append ('pp. {}–{}'.format (start, end))
else:
ret.append ('p. {}'.format (start))
return ', '.join (ret)
def relUri (base, u):
if u.startswith (base):
return u[len (base):]
else:
return u
def hideLocalUri (base, l):
"""
Show local uris only iff no other sources are available
"""
l = list (l)
notLocal = list (filter (lambda u: relUri (base, u) == u, l))
return notLocal or l
def getRecursive (s, g, n, predicate):
"""
Look for predicate in n and all Things it is a part of until it is found
"""
res = g.objects (n, predicate)
if res:
yield from res
parents = g.objects (n, s.isPartOf)
for p in parents:
yield from getRecursive (s, g, p, predicate)
def getRecursiveAll (s, g, n, predicate):
parents = list (g.objects (n, predicate))
yield from parents
for p in parents:
yield from getRecursiveAll (s, g, p, predicate)
def warnUnusedButDefined (graph, rootNode):
"""
Warn about defined, but unused subjects
"""
subjects = set ()
objects = set ()
for s, p, o in graph:
subjects.add (s)
objects.add (o)
for unused in subjects.difference (objects):
if unused == rootNode:
continue
print ('Unused: {}'.format (unused), file=sys.stderr)
for ctxp, ctxo in g[unused]:
print ('\t{} {}'.format (ctxp, ctxo), file=sys.stderr)
if __name__ == '__main__':
g = Graph()
result = g.parse (sys.stdin, format='turtle')
rootUri = sys.argv[1]
rootNode = URIRef (rootUri)
s = Namespace("https://schema.org/")
warnUnusedButDefined (result, rootNode)
for ref in result.objects (rootNode, s.citation):
t = list (g.objects (ref, RDF.type))
assert len (t) == 1
t = t[0]
# object should have a name
what = first (g.objects (ref, s.name))
# look for people who wrote/translated/edited it
who = map (lambda a: formatPerson (s, g, a), getRecursive (s, g, ref, s.author))
#who = chain (who, map (lambda a: formatPerson (s, g, a) + ' (ed.)', getRecursive (s, g, ref, s.editor)))
#who = chain (who, map (lambda a: formatPerson (s, g, a) + ' (trans.)', getRecursive (s, g, ref, s.translator)))
who = humanList (list (who))
# when was it published?
when = first (getRecursive (s, g, ref, s.datePublished))
if not when:
# fall back to creation date
when = first (getRecursive (s, g, ref, s.dateCreated))
# where can we find it? (print)
# print from root to ref (i.e. magazine, volume, issue)
parents = reversed (list (getRecursiveAll (s, g, ref, s.isPartOf)))
where = list (filter (lambda x: x, [formatParent (s, g, p) for p in parents]))
thiswhere = formatParent (s, g, ref, False)
if thiswhere:
where.append (thiswhere)
# where can we find it? (online)
urls = hideLocalUri (rootUri, g.objects (ref, s.url))
urls = ['`{} <{}>`__'.format (formatDomain (url), relUri (rootUri, url)) for url in urls]
refname = urlparse (ref).fragment
if not refname:
refname = first (g.objects (ref, s.alternateName))
ret = '.. [{}] \\ '.format (refname)
if who:
ret += ' {}:'.format (who)
if what:
ret += ' *{}*.'.format (what)
if where:
ret += ' {}.'.format (', '.join (where))
if when:
ret += ' {}.'.format (when)
if urls:
ret += ' {}.'.format (', '.join (urls))
print (ret)
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