mirror of
https://github.com/ankitects/anki.git
synced 2025-09-19 14:32:22 -04:00
bc9f6e6a24
Decks now have an "update sequence number". All objects also have a USN, which is set to the deck USN each time they are modified. When syncing, each side sends any objects with a USN >= clientUSN. When objects are copied via sync, they have their USNs bumped to the current serverUSN. After a sync, the USN on both sides is set to serverUSN + 1. This solves the failing three way test, ensures we receive all changes regardless of clock drift, and as the revlog also has a USN now, ensures that old revlog entries are imported properly too. Objects retain a separate modification time, which is used for conflict resolution, deck subscriptions/importing, and info for the user. Note that if the clock is too far off, it will still cause confusion for users, as the due counts may be different depending on the time. For this reason it's probably a good idea to keep a limit on how far the clock can deviate. We still keep track of the last sync time, but only so we can determine if the schema has changed since the last sync. The media code needs to be updated to use USNs too.
417 lines
12 KiB
Python
417 lines
12 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright: Damien Elmes <anki@ichi2.net>
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# License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
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import simplejson, copy
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from anki.utils import intTime, hexifyID, joinFields, splitFields, ids2str, \
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timestampID
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from anki.lang import _
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from anki.consts import *
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# Models
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##########################################################################
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# careful not to add any lists/dicts/etc here, as they aren't deep copied
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defaultModel = {
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'css': "",
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'sortf': 0,
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'gid': 1,
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'clozectx': False,
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'newOrder': NEW_CARDS_DUE,
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'latexPre': """\
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\\documentclass[12pt]{article}
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\\special{papersize=3in,5in}
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\\usepackage[utf8x]{inputenc}
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\\usepackage{amssymb,amsmath}
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\\pagestyle{empty}
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\\setlength{\\parindent}{0in}
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\\begin{document}
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""",
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'latexPost': "\\end{document}",
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'mod': 0,
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'usn': 0,
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}
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defaultField = {
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'name': "",
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'ord': None,
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'rtl': False,
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'req': False,
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'uniq': False,
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'font': "Arial",
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'qsize': 20,
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'esize': 20,
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'qcol': "#000",
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'pre': True,
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'sticky': False,
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}
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defaultTemplate = {
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'name': "",
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'ord': None,
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'actv': True,
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'qfmt': "",
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'afmt': "",
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'hideQ': False,
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'align': 0,
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'bg': "#fff",
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'emptyAns': True,
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'typeAns': None,
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'gid': None,
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}
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class ModelManager(object):
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# Saving/loading registry
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#############################################################
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def __init__(self, deck):
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self.deck = deck
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def load(self, json):
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"Load registry from JSON."
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self.changed = False
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self.models = simplejson.loads(json)
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def save(self, m=None):
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"Mark M modified if provided, and schedule registry flush."
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if m:
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m['mod'] = intTime()
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m['usn'] = self.deck.usn()
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m['css'] = self._css(m)
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self.changed = True
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def flush(self):
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"Flush the registry if any models were changed."
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if self.changed:
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self.deck.db.execute("update deck set models = ?",
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simplejson.dumps(self.models))
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# Retrieving and creating models
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#############################################################
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def current(self):
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"Get current model."
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try:
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return self.get(self.deck.groups.top()['curModel'])
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except:
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return self.models.values()[0]
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def setCurrent(self, m):
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self.deck.groups.top()['curModel'] = m['id']
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def get(self, id):
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"Get model with ID, or None."
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id = str(id)
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if id in self.models:
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return self.models[id]
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def all(self):
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"Get all models."
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return self.models.values()
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def byName(self, name):
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"Get model with NAME."
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for m in self.models.values():
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if m['name'].lower() == name.lower():
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return m
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def new(self, name):
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"Create a new model, save it in the registry, and return it."
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# caller should call save() after modifying
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m = defaultModel.copy()
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m['name'] = name
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m['mod'] = intTime()
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m['flds'] = []
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m['tmpls'] = []
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m['tags'] = []
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return self._add(m)
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def rem(self, m):
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"Delete model, and all its cards/facts."
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self.deck.modSchema()
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current = self.current()['id'] == m['id']
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# delete facts/cards
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self.deck.remCards(self.deck.db.list("""
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select id from cards where fid in (select id from facts where mid = ?)""",
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m['id']))
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# then the model
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del self.models[m['id']]
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self.save()
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# GUI should ensure last model is not deleted
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if current:
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self.setCurrent(self.models.values()[0])
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def _add(self, m):
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self._setID(m)
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self.update(m)
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self.setCurrent(m)
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return m
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def update(self, m):
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"Add or update an existing model. Used for syncing and merging."
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self.models[str(m['id'])] = m
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# mark registry changed, but don't bump mod time
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self.save()
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def _setID(self, m):
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while 1:
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id = str(intTime(1000))
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if id not in self.models:
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break
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m['id'] = id
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# Tools
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##################################################
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def fids(self, m):
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"Fact ids for M."
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return self.deck.db.list(
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"select id from facts where mid = ?", m['id'])
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def useCount(self, m):
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"Number of fact using M."
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return self.deck.db.scalar(
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"select count() from facts where mid = ?", m['id'])
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def randomNew(self):
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return self.current()['newOrder'] == NEW_CARDS_RANDOM
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# Copying
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##################################################
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def copy(self, m):
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"Copy, save and return."
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m2 = copy.deepcopy(m)
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m2['name'] = _("%s copy") % m2['name']
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return self._add(m2)
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# CSS generation
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##################################################
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def css(self):
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"CSS for all models."
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return "\n".join([m['css'] for m in self.all()])
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def _css(self, m):
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# fields
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css = "".join(self._fieldCSS(
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".fm%s-%s" % (hexifyID(m['id']), hexifyID(f['ord'])),
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(f['font'], f['qsize'], f['qcol'], f['rtl'], f['pre']))
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for f in m['flds'])
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# templates
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css += "".join(".cm%s-%s {text-align:%s;background:%s}\n" % (
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hexifyID(m['id']), hexifyID(t['ord']),
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("center", "left", "right")[t['align']], t['bg'])
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for t in m['tmpls'])
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return css
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def _rewriteFont(self, font):
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"Convert a platform font to a multiplatform list."
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font = font.lower()
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for family in self.deck.conf['fontFamilies']:
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for font2 in family:
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if font == font2.lower():
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return ",".join(family)
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return font
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def _fieldCSS(self, prefix, row):
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(fam, siz, col, rtl, pre) = row
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t = 'font-family:"%s";' % self._rewriteFont(fam)
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t += 'font-size:%dpx;' % siz
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t += 'color:%s;' % col
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if rtl:
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t += "direction:rtl;unicode-bidi:embed;"
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if pre:
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t += "white-space:pre-wrap;"
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t = "%s {%s}\n" % (prefix, t)
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return t
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# Fields
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##################################################
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def newField(self, name):
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f = defaultField.copy()
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f['name'] = name
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return f
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def fieldMap(self, m):
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"Mapping of field name -> (ord, field)."
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return dict((f['name'], (f['ord'], f)) for f in m['flds'])
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def sortIdx(self, m):
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return m['sortf']
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def setSortIdx(self, m, idx):
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assert idx >= 0 and idx < len(m['flds'])
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self.deck.modSchema()
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m['sortf'] = idx
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self.deck.updateFieldCache(self.fids(m), csum=False)
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self.save(m)
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def addField(self, m, field):
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m['flds'].append(field)
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self._updateFieldOrds(m)
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self.save(m)
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def add(fields):
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fields.append("")
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return fields
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self._transformFields(m, add)
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def delField(self, m, field):
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idx = m['flds'].index(field)
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m['flds'].remove(field)
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self._updateFieldOrds(m)
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def delete(fields):
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del fields[idx]
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return fields
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self._transformFields(m, delete)
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if idx == self.sortIdx(m):
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# need to rebuild
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self.deck.updateFieldCache(self.fids(m), csum=False)
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# saves
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self.renameField(m, field, None)
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def moveField(self, m, field, idx):
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oldidx = m['flds'].index(field)
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if oldidx == idx:
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return
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m['flds'].remove(field)
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m['flds'].insert(idx, field)
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self._updateFieldOrds(m)
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self.save(m)
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def move(fields, oldidx=oldidx):
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val = fields[oldidx]
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del fields[oldidx]
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fields.insert(idx, val)
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return fields
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self._transformFields(m, move)
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def renameField(self, m, field, newName):
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self.deck.modSchema()
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for t in m['tmpls']:
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types = ("{{%s}}", "{{text:%s}}", "{{#%s}}",
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"{{^%s}}", "{{/%s}}")
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for type in types:
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for fmt in ('qfmt', 'afmt'):
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if newName:
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repl = type%newName
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else:
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repl = ""
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t[fmt] = t[fmt].replace(type%field['name'], repl)
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field['name'] = newName
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self.save(m)
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def _updateFieldOrds(self, m):
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for c, f in enumerate(m['flds']):
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f['ord'] = c
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def _transformFields(self, m, fn):
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self.deck.modSchema()
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r = []
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for (id, flds) in self.deck.db.execute(
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"select id, flds from facts where mid = ?", m['id']):
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r.append((joinFields(fn(splitFields(flds))),
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intTime(), self.deck.usn(), id))
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self.deck.db.executemany(
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"update facts set flds=?,mod=?,usn=? where id = ?", r)
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# Templates
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##################################################
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def newTemplate(self, name):
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t = defaultTemplate.copy()
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t['name'] = name
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return t
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def addTemplate(self, m, template):
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self.deck.modSchema()
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m['tmpls'].append(template)
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self._updateTemplOrds(m)
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self.save(m)
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def delTemplate(self, m, template):
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self.deck.modSchema()
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ord = m['tmpls'].index(template)
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cids = self.deck.db.list("""
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select c.id from cards c, facts f where c.fid=f.id and mid = ? and ord = ?""",
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m['id'], ord)
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self.deck.remCards(cids)
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# shift ordinals
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self.deck.db.execute("""
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update cards set ord = ord - 1, usn = ?, mod = ?
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where fid in (select id from facts where mid = ?) and ord > ?""",
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self.deck.usn(), intTime(), m['id'], ord)
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m['tmpls'].remove(template)
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self._updateTemplOrds(m)
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self.save(m)
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def _updateTemplOrds(self, m):
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for c, t in enumerate(m['tmpls']):
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t['ord'] = c
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def moveTemplate(self, m, template, idx):
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oldidx = m['tmpls'].index(template)
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if oldidx == idx:
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return
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oldidxs = dict((id(t), t['ord']) for t in m['tmpls'])
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m['tmpls'].remove(template)
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m['tmpls'].insert(idx, template)
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self._updateTemplOrds(m)
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# generate change map
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map = []
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for t in m['tmpls']:
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map.append("when ord = %d then %d" % (oldidxs[id(t)], t['ord']))
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# apply
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self.save(m)
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self.deck.db.execute("""
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update cards set ord = (case %s end),usn=?,mod=? where fid in (
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select id from facts where mid = ?)""" % " ".join(map),
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self.deck.usn(), intTime(), m['id'])
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# Model changing
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##########################################################################
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# - maps are ord->ord, and there should not be duplicate targets
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# - newModel should be self if model is not changing
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def change(self, m, fids, newModel, fmap, cmap):
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self.deck.modSchema()
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assert newModel['id'] == m['id'] or (fmap and cmap)
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if fmap:
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self._changeFacts(fids, newModel, fmap)
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if cmap:
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self._changeCards(fids, newModel, cmap)
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def _changeFacts(self, fids, newModel, map):
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d = []
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nfields = len(newModel['flds'])
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for (fid, flds) in self.deck.db.execute(
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"select id, flds from facts where id in "+ids2str(fids)):
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newflds = {}
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flds = splitFields(flds)
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for old, new in map.items():
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newflds[new] = flds[old]
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flds = []
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for c in range(nfields):
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flds.append(newflds.get(c, ""))
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flds = joinFields(flds)
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d.append(dict(fid=fid, flds=flds, mid=newModel['id'],
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m=intTime(),u=self.deck.usn()))
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self.deck.db.executemany(
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"update facts set flds=:flds,mid=:mid,mod=:m,usn=:u where id = :fid", d)
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self.deck.updateFieldCache(fids)
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def _changeCards(self, fids, newModel, map):
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d = []
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deleted = []
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for (cid, ord) in self.deck.db.execute(
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"select id, ord from cards where fid in "+ids2str(fids)):
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if map[ord] is not None:
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d.append(dict(
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cid=cid,new=map[ord],u=self.deck.usn(),m=intTime()))
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else:
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deleted.append(cid)
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self.deck.db.executemany(
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"update cards set ord=:new,usn=:u,mod=:m where id=:cid",
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d)
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self.deck.remCards(deleted)
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