def string_blocks_to_events(string_blocks, p = None):
"""Given a set of string blocks (as produced by html_to_string_blocks,
expects that all strings are non-empty), returns a list of timeline
events. A timeline event is {date: number, date_string: string, content: string}
"""
curr_ignore_sections = _ignore_sections.copy()
p = param_defaults(p or {})
def section_test(name):
if p['single_section']:
return name.strip().lower() == p['single_section'].strip().lower()
else:
return name.strip().lower() not in curr_ignore_sections
if all(not section_test(sb['heading'][0]) for sb in string_blocks):
# allow the first section to be processed if it is the only section,
# excluding excluded sections like see also, etc. Usually this section
# is just an intro paragraph, but if this if statement is true, it is
# probably the entire content of the article
try:
curr_ignore_sections.remove('')
except KeyError:
pass
if p['extra_ignore_sections']:
for s in p['extra_ignore_sections'].split('&'):
curr_ignore_sections.add(s.lower().strip())
curr_event = None
events = []
for string_block in string_blocks:
prev_date = None
if section_test(string_block['heading'][0]):
# create base date based on headings:
# possible perf improvement by caching results for headings across string_blocks
base_date = TimelineDate(TimePoint())
base_date_string = ''
for h in string_block['heading']:
parse = parse_date_html(h)
if parse:
base_date = TimelineDate.combine(base_date, parse[0])
base_date_string = parse[1]
# if there's a year specified in the headings, we create a fuzzy
# range that child elements of those headings need to fall in
base_date_range = None
if base_date.start_year() != None:
delta_minus = 10
delta_plus = 20
m = re.search(ur'0+$', str(base_date.start.year))
if m:
delta_minus = int('1' + ('0' * (m.end() - m.start())))
delta_plus = delta_minus * 2
base_date_range = (base_date.start_year() - delta_minus, base_date.start_year() + delta_plus)
for line in string_block['lines']:
if line['line_type'] == LineTypes.line:
parse = parse_date_html(line['line'])
# if we can parse a date, create a new event
if parse and \
((not base_date_range) or \
(parse[0].start_year() == None) or \
(base_date_string.lower().strip() == 'antiquity') or \
(parse[0].start_year() >= base_date_range[0] and \
parse[0].start_year() <= base_date_range[1]) or \
(TimelineDate.can_combine_as_day(base_date, parse[0]))
):
_close_event(events, curr_event)
date = parse[0]
if date.start_year() == None and prev_date:
# this is the case where we have a month or
# monthday but no year. in this case, take it from
# the previous event
date = TimelineDate.combine(prev_date, date)
date = TimelineDate.combine(base_date, date)
curr_event = {
'date': date.start_year(),
'date_length': date.length(),
'date_string': parse[1],
'content': parse[2]
}
prev_date = date
# if we can't parse a date, append the line to the
# current event if there is one
elif curr_event:
if p['continuations']:
curr_event['content'] += _line_break + line['line']
else:
_close_event(events, curr_event)
curr_event = {
'date': curr_event['date'],
'date_length': curr_event['date_length'],
'date_string': curr_event['date_string'],
'content': line['line']
}
# if there's no parse and no current event, see if we can
# use the base_date
elif base_date.start_year() != None:
# no need to close events because curr_event is None
curr_event = {
'date': base_date.start_year(),
'date_length': base_date.length(),
'date_string': base_date_string,
'content': line['line']
}
elif line['line_type'] == LineTypes.table:
_close_event(events, curr_event)
events += _table_to_events(line['line'], base_date, p)
curr_event = None
_close_event(events, curr_event)
curr_event = None
return events
def _table_to_events(table, base_date, p = None):
"""Given a table html element as a BeautifulSoup, returns a list of
"""
p = param_defaults(p or {})
def get_rowspan(td):
s = td.get('rowspan')
if s == None:
return None
try:
i = int(s)
except ValueError:
return None
if i >= 0:
return i
else:
return None
events = []
year_col_index = None
date_col_index = None
for row in table.find_all('tr'):
cells = row.find_all('th')
for i, cell in enumerate(cells):
cell_text = cell.get_text().strip().lower()
if cell_text == 'year': year_col_index = i
elif cell_text == 'date': date_col_index = i
if date_col_index != None and year_col_index == None:
year_col_index = date_col_index
date_col_index = None
if year_col_index == None and date_col_index == None:
# just try using the first column. could be a bit smarter about giving
# up early to save some cycles...
year_col_index = 0
if year_col_index != None or date_col_index != None:
# a td that has a rowspan will be stored as (col_index, cell) The
# rowspan number essentially gets decremented in the td element each
# time it is added to the subsequent row
rowspans = []
# only used if split_within_row is True
open_rowspans = {}
for row in table.find_all('tr'):
cells = row.find_all('td')
# first, apply existing rowspans
for (i, cell) in rowspans:
if get_rowspan(cell) > 0:
cells.insert(i, cell)
# then, recollect existing and new rowspans
rowspans = []
for (i, cell) in enumerate(cells):
rs = get_rowspan(cell)
if rs:
cell['rowspan'] = rs - 1
rowspans.append((i, cell))
if len(cells) == 0 and len(row.find_all('th')) == 1:
cells = row.find_all('th')
if len(cells) == 1:
extract = parse_date_html(_bs_inner_html(cells[0]))
if extract:
base_date = TimelineDate.combine(base_date, extract[0])
events.append({
'date': base_date.start_year(),
'date_length': base_date.length(),
'date_string': extract[1],
'content': extract[2]
})
elif len(cells) > year_col_index:
extract = parse_date_html(_bs_inner_html(cells[year_col_index]))
if extract:
date = extract[0]
date_string = extract[1]
if date_col_index != None and len(cells) > date_col_index:
extract2 = parse_date_html(_bs_inner_html(cells[date_col_index]))
if extract2:
date = TimelineDate.combine(date, extract2[0])
date_string += ' ' + extract2[1]
date = TimelineDate.combine(base_date, date)
content_cells = [cell for (i, cell) in \
enumerate(cells) if i != year_col_index and i != date_col_index]
if p['keep_row_together']:
content = ' '.join(_bs_inner_html(cell) for cell in content_cells)
events.append({
'date': date.start_year(),
'date_length': date.length(),
'date_string': date_string,
'content': content
})
else:
# deal with rowspan cells
rowspan_cells = [cell for cell in content_cells if get_rowspan(cell) != None]
for cell in rowspan_cells:
if _bs_inner_html(cell) not in open_rowspans:
open_rowspans[_bs_inner_html(cell)] = (date, date_string)
elif get_rowspan(cell) <= 0: # and in open_rowspans, implicitly
rowspan_start = open_rowspans[_bs_inner_html(cell)]
rowspan_date = TimelineDate.span_from_dates(rowspan_start[0], date)
rowspan_date_string = rowspan_start[1] + ' - ' + date_string
for line in _lines_from_html(cell):
events.append({
'date': rowspan_date.start_year(),
'date_length': rowspan_date.length(),
'date_string': rowspan_date_string,
'content': line
})
# deal with non-rowspan cells
for cell in content_cells:
if get_rowspan(cell) == None:
for line in _lines_from_html(cell):
events.append({
'date': date.start_year(),
'date_length': date.length(),
'date_string': date_string,
'content': line
})
return events
def test_one(self): print(TimePoint.combine(TimePoint(1920, 4), TimePoint(None, 5, 3))) print(TimePoint.combine(TimePoint(1920), TimePoint(None, 4))) print(TimelineDate.combine(TimelineDate(TimePoint(1920, 8)), TimelineDate(TimePoint(4))))
