Add personal accounts, scoped access and editable family genealogy
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"""A private family register, independent from login accounts and camera roles."""
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import datetime as dt
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import json
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import secrets
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class Family:
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def __init__(self, app):
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self.a = app
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def initialize(self):
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with self.a.LOCK:
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self.a.DB.executescript('''
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CREATE TABLE IF NOT EXISTS people (id TEXT PRIMARY KEY, body TEXT NOT NULL);
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CREATE TABLE IF NOT EXISTS family_links (id TEXT PRIMARY KEY, body TEXT NOT NULL);
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''')
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self.a.DB.commit()
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def authorize(self, user, edit=False):
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if user['role'] != 'admin' and user.get('familyAccess', 'none') not in (('edit',) if edit else ('read', 'edit')):
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raise self.a.Problem('没有家谱' + ('编辑' if edit else '查看') + '权限', 403)
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def snapshot(self, user):
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self.authorize(user)
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with self.a.LOCK:
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return {'revision': self.a.setting('familyRevision', 0), 'people': self.a.objects('people'),
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'links': self.a.objects('family_links'),
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'canEdit': user['role'] == 'admin' or user.get('familyAccess') == 'edit',
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'selfId': user.get('personId', '')}
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def save(self, kind, data, user):
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self.authorize(user, True)
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a = self.a
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with a.LOCK:
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revision = a.setting('familyRevision', 0)
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if type(data.get('revision')) is not int or data['revision'] != revision:
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raise a.Problem('家谱已被更新，请重新载入后再编辑', 409)
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table = 'people' if kind == 'person' else 'family_links'
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old = a.get_object(table, data.get('id'))
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if data.get('id') and not old:
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raise a.Problem('家谱记录不存在', 404)
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item = self.person(data, old) if kind == 'person' else self.link(data, old)
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item.update(updatedAt=dt.datetime.now(dt.timezone.utc).isoformat(), updatedBy=user['username'])
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# Revision and record are committed together, so concurrent forms cannot overwrite silently.
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a.DB.execute('INSERT OR REPLACE INTO ' + table + ' VALUES (?,?)', (item['id'], json.dumps(item)))
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a.DB.execute('INSERT OR REPLACE INTO settings VALUES (?,?)', ('familyRevision', json.dumps(revision + 1)))
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a.DB.commit()
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a.audit('更新家谱人物' if kind == 'person' else '更新家谱关系', user['username'])
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return {'item': item, 'revision': revision + 1}
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def person(self, data, old):
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a = self.a
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item = {'id': old['id'] if old else secrets.token_hex(8)}
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for key, maximum in [('name', 80), ('alias', 120), ('birthDate', 10), ('deathDate', 10),
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('birthplace', 160), ('biography', 2000), ('note', 500)]:
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value = data.get(key, '')
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if key in ('biography', 'note'):
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if not isinstance(value, str) or len(value) > maximum or any(ord(c) < 32 and c not in '\r\n\t' for c in value):
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raise a.Problem('生平或备注格式不正确')
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item[key] = value.strip()
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else:
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item[key] = a.clean_text(value, maximum, key == 'name')
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for key in ('birthDate', 'deathDate'):
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if item[key]:
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try:
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if dt.date.fromisoformat(item[key]).isoformat() != item[key]:
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raise ValueError()
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except ValueError:
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raise a.Problem('日期请使用公历 YYYY-MM-DD；不确定可留空，在备注记录')
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if item['birthDate'] and item['deathDate'] and item['birthDate'] > item['deathDate']:
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raise a.Problem('逝世日期不能早于出生日期')
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item['gender'] = data.get('gender', 'unknown')
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item['lifeStatus'] = data.get('lifeStatus', 'unknown')
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if item['gender'] not in ('male', 'female', 'unknown') or item['lifeStatus'] not in ('alive', 'deceased', 'unknown'):
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raise a.Problem('人物属性不正确')
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if item['deathDate'] and item['lifeStatus'] != 'deceased':
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raise a.Problem('填写逝世日期时，请选择已故')
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item['archived'] = data.get('archived', False)
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if not isinstance(item['archived'], bool):
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raise a.Problem('归档状态不正确')
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return item
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def link(self, data, old):
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a = self.a
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left, right = data.get('fromId'), data.get('toId')
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if not isinstance(left, str) or not isinstance(right, str) or not a.get_object('people', left) or not a.get_object('people', right):
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raise a.Problem('请先录入关系双方的人物')
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if left == right:
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raise a.Problem('不能把人物与自己建立亲属关系')
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kind = data.get('kind')
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if kind not in ('parent', 'spouse'):
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raise a.Problem('关系类型不正确')
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lineage = data.get('lineage', 'unspecified')
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if lineage not in ('biological', 'adoptive', 'step', 'unspecified'):
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raise a.Problem('亲子关系属性不正确')
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active = data.get('active', True)
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if not isinstance(active, bool):
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raise a.Problem('关系状态不正确')
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item = dict(id=old['id'] if old else secrets.token_hex(8), fromId=left, toId=right, kind=kind,
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lineage=lineage if kind == 'parent' else 'unspecified', active=active,
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note=a.clean_text(data.get('note', ''), 300))
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links = [e for e in a.objects('family_links') if e.get('active') and e['id'] != item['id']]
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if active:
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for e in links:
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same = (e['fromId'], e['toId']) == (left, right)
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if kind == 'spouse':
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same = {e['fromId'], e['toId']} == {left, right}
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if e['kind'] == kind and same:
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raise a.Problem('这条关系已经存在', 409)
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graph = {}
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for e in links + [item]:
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if e['kind'] == 'parent':
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graph.setdefault(e['fromId'], []).append(e['toId'])
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# Iterative walk supports deep ancestry without Python recursion limits.
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def reaches(start, target):
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pending, seen = [start], set()
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while pending:
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p = pending.pop()
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if p in seen:
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continue
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seen.add(p)
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for child in graph.get(p, []):
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if child == target:
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return True
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pending.append(child)
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return False
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if kind == 'parent' and reaches(right, left):
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raise a.Problem('这条关系会形成祖先与后代循环，请检查方向')
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for e in links + [item]:
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if e['kind'] == 'spouse' and (reaches(e['fromId'], e['toId']) or reaches(e['toId'], e['fromId'])):
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raise a.Problem('配偶不能同时是直系祖先或后代，请检查已有关系')
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return item
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