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import re
import rdflib
from django import template
from aacore import app, NS


register = template.Library()


@register.filter(name='URLpath')
def URLpath(value, arg=-1):
    splitted = value.split("/")
    arg = int(arg)
    try:
        if splitted[arg] == "":
            arg = arg - 1
        return splitted[arg]
    except IndexError:
        pass


@register.filter(name='uncamel')
def uncamel(value):
    return re.sub('(((?<=[a-z])[A-Z])|([A-Z](?![A-Z]|$)))', ' \\1', value).lower().strip('_')


@register.inclusion_tag('aacore/partials/bigram_list.html')
def bigram_list():
    rows = app.graph.query("""
    SELECT DISTINCT ?o
    WHERE {
        ?s stats:bigram ?o .
    } ORDER BY lcase(?o)
    """, initNs=NS)

    return {'rows': rows}


@register.inclusion_tag('aacore/partials/bigram_list.html')
def character_list():
    rows = app.graph.query("""
    SELECT DISTINCT ?o
    WHERE {
        ?s stats:hasCharacter ?o .
    } ORDER BY lcase(?o)
    """, initNs=NS)

    return {'rows': rows}


@register.inclusion_tag('aacore/partials/bigram_list.html')
def oracle_list():
    g = app.graph.get_context(rdflib.URIRef("http://kavan.land/statements/zotero/zotero.rdf"))

    rows = g.query("""
    SELECT DISTINCT ?o
    WHERE {
        ?s dc:subject ?o .
    } ORDER BY lcase(?o)
    """, initNs=NS)

    return {'rows': rows}