OpenSystemsDevelopment / qpdf

Objectinfo json: write incrementally and in numeric order

This script was used on test data:

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#!/usr/bin/env python3
import json
import sys
import re

def json_dumps(data):
    return json.dumps(data, ensure_ascii=False,
                      indent=2, separators=(',', ': '))

for filename in sys.argv[1:]:
    with open(filename, 'r') as f:
        data = json.loads(f.read())
    if 'objectinfo' not in data:
        continue
    trailer = None
    to_sort = []
    for k, v in data['objectinfo'].items():
        if k == 'trailer':
            trailer = v
        else:
            m = re.match(r'^(\d+) \d+ R', k)
            if m:
                to_sort.append([int(m.group(1)), k, v])
    newobjectinfo = {x[1]: x[2] for x in sorted(to_sort)}
    if trailer is not None:
        newobjectinfo['trailer'] = trailer
    data['objectinfo'] = newobjectinfo
print(json_dumps(data))
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