mirror of
https://github.com/ankitects/anki.git
synced 2025-09-19 06:22:22 -04:00
680 lines
22 KiB
Python
680 lines
22 KiB
Python
# Copyright: Ankitects Pty Ltd and contributors
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# License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
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from __future__ import annotations
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import gzip
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import io
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import json
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import os
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import random
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from typing import Any, Dict, List, Optional, Sequence, Tuple, Union
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import anki
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from anki.consts import *
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from anki.db import DB
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from anki.utils import checksum, devMode, ids2str, intTime, platDesc, versionWithBuild
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from . import hooks
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from .httpclient import HttpClient
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# add-on compat
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AnkiRequestsClient = HttpClient
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class UnexpectedSchemaChange(Exception):
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pass
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# Incremental syncing
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##########################################################################
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class Syncer:
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chunkRows: Optional[List[Sequence]]
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def __init__(self, col: anki.storage._Collection, server=None) -> None:
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self.col = col.weakref()
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self.server = server
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# these are set later; provide dummy values for type checking
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self.lnewer = False
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self.maxUsn = 0
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self.tablesLeft: List[str] = []
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def sync(self) -> str:
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"Returns 'noChanges', 'fullSync', 'success', etc"
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self.syncMsg = ""
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self.uname = ""
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# if the deck has any pending changes, flush them first and bump mod
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# time
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self.col.save()
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# step 1: login & metadata
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hooks.sync_stage_did_change("login")
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meta = self.server.meta()
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self.col.log("rmeta", meta)
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if not meta:
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return "badAuth"
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# server requested abort?
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self.syncMsg = meta["msg"]
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if not meta["cont"]:
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return "serverAbort"
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else:
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# don't abort, but if 'msg' is not blank, gui should show 'msg'
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# after sync finishes and wait for confirmation before hiding
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pass
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rscm = meta["scm"]
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rts = meta["ts"]
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self.rmod = meta["mod"]
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self.maxUsn = meta["usn"]
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self.uname = meta.get("uname", "")
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self.hostNum = meta.get("hostNum")
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meta = self.meta()
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self.col.log("lmeta", meta)
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self.lmod = meta["mod"]
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self.minUsn = meta["usn"]
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lscm = meta["scm"]
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lts = meta["ts"]
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if abs(rts - lts) > 300:
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self.col.log("clock off")
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return "clockOff"
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if self.lmod == self.rmod:
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self.col.log("no changes")
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return "noChanges"
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elif lscm != rscm:
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self.col.log("schema diff")
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return "fullSync"
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self.lnewer = self.lmod > self.rmod
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# step 1.5: check collection is valid
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if not self.col.basicCheck():
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self.col.log("basic check")
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return "basicCheckFailed"
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# step 2: startup and deletions
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hooks.sync_stage_did_change("meta")
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rrem = self.server.start(
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minUsn=self.minUsn, lnewer=self.lnewer, offset=self.col.localOffset()
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)
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# apply deletions to server
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lgraves = self.removed()
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while lgraves:
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gchunk, lgraves = self._gravesChunk(lgraves)
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self.server.applyGraves(chunk=gchunk)
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# then apply server deletions here
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self.remove(rrem)
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# ...and small objects
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lchg = self.changes()
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rchg = self.server.applyChanges(changes=lchg)
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try:
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self.mergeChanges(lchg, rchg)
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except UnexpectedSchemaChange:
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self.server.abort()
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return self._forceFullSync()
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# step 3: stream large tables from server
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hooks.sync_stage_did_change("server")
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while 1:
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hooks.sync_stage_did_change("stream")
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chunk = self.server.chunk()
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self.col.log("server chunk", chunk)
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self.applyChunk(chunk=chunk)
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if chunk["done"]:
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break
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# step 4: stream to server
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hooks.sync_stage_did_change("client")
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while 1:
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hooks.sync_stage_did_change("stream")
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chunk = self.chunk()
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self.col.log("client chunk", chunk)
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self.server.applyChunk(chunk=chunk)
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if chunk["done"]:
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break
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# step 5: sanity check
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hooks.sync_stage_did_change("sanity")
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c = self.sanityCheck()
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ret = self.server.sanityCheck2(client=c)
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if ret["status"] != "ok":
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return self._forceFullSync()
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# finalize
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hooks.sync_stage_did_change("finalize")
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mod = self.server.finish()
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self.finish(mod)
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return "success"
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def _forceFullSync(self) -> str:
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# roll back and force full sync
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self.col.rollback()
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self.col.modSchema(False)
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self.col.save()
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return "sanityCheckFailed"
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def _gravesChunk(self, graves: Dict) -> Tuple[Dict, Optional[Dict]]:
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lim = 250
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chunk: Dict[str, Any] = dict(notes=[], cards=[], decks=[])
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for cat in "notes", "cards", "decks":
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if lim and graves[cat]:
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chunk[cat] = graves[cat][:lim]
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graves[cat] = graves[cat][lim:]
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lim -= len(chunk[cat])
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# anything remaining?
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if graves["notes"] or graves["cards"] or graves["decks"]:
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return chunk, graves
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return chunk, None
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def meta(self) -> dict:
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return dict(
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mod=self.col.mod,
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scm=self.col.scm,
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usn=self.col._usn,
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ts=intTime(),
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musn=0,
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msg="",
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cont=True,
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)
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def changes(self) -> dict:
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"Bundle up small objects."
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d: Dict[str, Any] = dict(
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models=self.getModels(), decks=self.getDecks(), tags=self.getTags()
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)
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if self.lnewer:
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d["conf"] = self.getConf()
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d["crt"] = self.col.crt
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return d
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def mergeChanges(self, lchg, rchg) -> None:
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# then the other objects
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self.mergeModels(rchg["models"])
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self.mergeDecks(rchg["decks"])
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self.mergeTags(rchg["tags"])
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if "conf" in rchg:
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self.mergeConf(rchg["conf"])
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# this was left out of earlier betas
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if "crt" in rchg:
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self.col.crt = rchg["crt"]
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self.prepareToChunk()
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def sanityCheck(self) -> Union[list, str]:
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if not self.col.basicCheck():
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return "failed basic check"
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for t in "cards", "notes", "revlog", "graves":
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if self.col.db.scalar("select count() from %s where usn = -1" % t):
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return "%s had usn = -1" % t
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for g in self.col.decks.all():
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if g["usn"] == -1:
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return "deck had usn = -1"
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for t, usn in self.col.tags.allItems():
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if usn == -1:
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return "tag had usn = -1"
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found = False
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for m in self.col.models.all():
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if m["usn"] == -1:
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return "model had usn = -1"
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if found:
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self.col.models.save()
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self.col.sched.reset()
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# check for missing parent decks
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self.col.sched.deckDueList()
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# return summary of deck
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return [
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list(self.col.sched.counts()),
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self.col.db.scalar("select count() from cards"),
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self.col.db.scalar("select count() from notes"),
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self.col.db.scalar("select count() from revlog"),
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self.col.db.scalar("select count() from graves"),
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len(self.col.models.all()),
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len(self.col.decks.all()),
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len(self.col.decks.allConf()),
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]
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def usnLim(self) -> str:
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return "usn = -1"
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def finish(self, mod: int) -> int:
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self.col.ls = mod
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self.col._usn = self.maxUsn + 1
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# ensure we save the mod time even if no changes made
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self.col.db.mod = True
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self.col.save(mod=mod)
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return mod
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# Chunked syncing
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##########################################################################
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def prepareToChunk(self) -> None:
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self.tablesLeft = ["revlog", "cards", "notes"]
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self.chunkRows = None
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def getChunkRows(self, table) -> List[Sequence]:
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lim = self.usnLim()
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x = self.col.db.all
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d = (self.maxUsn, lim)
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if table == "revlog":
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return x(
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"""
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select id, cid, %d, ease, ivl, lastIvl, factor, time, type
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from revlog where %s"""
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% d
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)
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elif table == "cards":
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return x(
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"""
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select id, nid, did, ord, mod, %d, type, queue, due, ivl, factor, reps,
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lapses, left, odue, odid, flags, data from cards where %s"""
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% d
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)
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else:
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return x(
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"""
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select id, guid, mid, mod, %d, tags, flds, '', '', flags, data
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from notes where %s"""
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% d
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)
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def chunk(self) -> dict:
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buf: Dict[str, Any] = dict(done=False)
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lim = 250
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while self.tablesLeft and lim:
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curTable = self.tablesLeft[0]
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if not self.chunkRows:
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self.chunkRows = self.getChunkRows(curTable)
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rows = self.chunkRows[:lim]
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self.chunkRows = self.chunkRows[lim:]
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fetched = len(rows)
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if fetched != lim:
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# table is empty
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self.tablesLeft.pop(0)
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self.chunkRows = None
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# mark the objects as having been sent
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self.col.db.execute(
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"update %s set usn=? where usn=-1" % curTable, self.maxUsn
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)
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buf[curTable] = rows
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lim -= fetched
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if not self.tablesLeft:
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buf["done"] = True
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return buf
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def applyChunk(self, chunk) -> None:
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if "revlog" in chunk:
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self.mergeRevlog(chunk["revlog"])
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if "cards" in chunk:
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self.mergeCards(chunk["cards"])
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if "notes" in chunk:
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self.mergeNotes(chunk["notes"])
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# Deletions
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##########################################################################
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def removed(self) -> dict:
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cards = []
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notes = []
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decks = []
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curs = self.col.db.execute("select oid, type from graves where usn = -1")
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for oid, type in curs:
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if type == REM_CARD:
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cards.append(oid)
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elif type == REM_NOTE:
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notes.append(oid)
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else:
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decks.append(oid)
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self.col.db.execute("update graves set usn=? where usn=-1", self.maxUsn)
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return dict(cards=cards, notes=notes, decks=decks)
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def remove(self, graves) -> None:
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# pretend to be the server so we don't set usn = -1
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self.col.server = True # type: ignore
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# notes first, so we don't end up with duplicate graves
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self.col._remNotes(graves["notes"])
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# then cards
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self.col.remCards(graves["cards"], notes=False)
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# and decks
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for oid in graves["decks"]:
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self.col.decks.rem(oid, childrenToo=False)
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self.col.server = False # type: ignore
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# Models
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##########################################################################
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def getModels(self) -> List:
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mods = [m for m in self.col.models.all() if m["usn"] == -1]
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for m in mods:
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m["usn"] = self.maxUsn
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self.col.models.save()
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return mods
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def mergeModels(self, rchg) -> None:
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for r in rchg:
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l = self.col.models.get(r["id"])
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# if missing locally or server is newer, update
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if not l or r["mod"] > l["mod"]:
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# This is a hack to detect when the note type has been altered
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# in an import without a full sync being forced. A future
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# syncing algorithm should handle this in a better way.
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if l:
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if len(l["flds"]) != len(r["flds"]):
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raise UnexpectedSchemaChange()
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if len(l["tmpls"]) != len(r["tmpls"]):
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raise UnexpectedSchemaChange()
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self.col.models.update(r)
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# Decks
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##########################################################################
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def getDecks(self) -> List[list]:
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decks = [g for g in self.col.decks.all() if g["usn"] == -1]
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for g in decks:
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g["usn"] = self.maxUsn
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dconf = [g for g in self.col.decks.allConf() if g["usn"] == -1]
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for g in dconf:
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g["usn"] = self.maxUsn
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self.col.decks.save()
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return [decks, dconf]
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def mergeDecks(self, rchg) -> None:
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for r in rchg[0]:
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l = self.col.decks.get(r["id"], False)
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# work around mod time being stored as string
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if l and not isinstance(l["mod"], int):
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l["mod"] = int(l["mod"])
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# if missing locally or server is newer, update
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if not l or r["mod"] > l["mod"]:
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self.col.decks.update(r)
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for r in rchg[1]:
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try:
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l = self.col.decks.getConf(r["id"])
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except KeyError:
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l = None
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# if missing locally or server is newer, update
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if not l or r["mod"] > l["mod"]:
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self.col.decks.updateConf(r)
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# Tags
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##########################################################################
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def getTags(self) -> List:
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tags = []
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for t, usn in self.col.tags.allItems():
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if usn == -1:
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self.col.tags.tags[t] = self.maxUsn
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tags.append(t)
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self.col.tags.save()
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return tags
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def mergeTags(self, tags) -> None:
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self.col.tags.register(tags, usn=self.maxUsn)
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# Cards/notes/revlog
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##########################################################################
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def mergeRevlog(self, logs) -> None:
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self.col.db.executemany(
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"insert or ignore into revlog values (?,?,?,?,?,?,?,?,?)", logs
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)
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def newerRows(self, data, table, modIdx) -> List:
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ids = (r[0] for r in data)
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lmods = {}
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for id, mod in self.col.db.execute(
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"select id, mod from %s where id in %s and %s"
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% (table, ids2str(ids), self.usnLim())
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):
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lmods[id] = mod
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update = []
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for r in data:
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if r[0] not in lmods or lmods[r[0]] < r[modIdx]:
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update.append(r)
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self.col.log(table, data)
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return update
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def mergeCards(self, cards) -> None:
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self.col.db.executemany(
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"insert or replace into cards values "
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"(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)",
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self.newerRows(cards, "cards", 4),
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)
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def mergeNotes(self, notes) -> None:
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rows = self.newerRows(notes, "notes", 3)
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self.col.db.executemany(
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"insert or replace into notes values (?,?,?,?,?,?,?,?,?,?,?)", rows
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)
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self.col.updateFieldCache([f[0] for f in rows])
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# Col config
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##########################################################################
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def getConf(self) -> Any:
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return self.col.conf
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def mergeConf(self, conf) -> None:
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self.col.conf = conf
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# HTTP syncing tools
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##########################################################################
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class HttpSyncer:
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def __init__(self, hkey=None, client=None, hostNum=None) -> None:
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self.hkey = hkey
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self.skey = checksum(str(random.random()))[:8]
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self.client = client or HttpClient()
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self.postVars: Dict[str, str] = {}
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self.hostNum = hostNum
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self.prefix = "sync/"
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def syncURL(self) -> str:
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if devMode:
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url = "https://l1sync.ankiweb.net/"
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else:
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url = SYNC_BASE % (self.hostNum or "")
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return url + self.prefix
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def assertOk(self, resp) -> None:
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# not using raise_for_status() as aqt expects this error msg
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if resp.status_code != 200:
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raise Exception("Unknown response code: %s" % resp.status_code)
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# Posting data as a file
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######################################################################
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# We don't want to post the payload as a form var, as the percent-encoding is
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# costly. We could send it as a raw post, but more HTTP clients seem to
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# support file uploading, so this is the more compatible choice.
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def _buildPostData(self, fobj, comp) -> Tuple[Dict[str, str], io.BytesIO]:
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BOUNDARY = b"Anki-sync-boundary"
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bdry = b"--" + BOUNDARY
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buf = io.BytesIO()
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# post vars
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self.postVars["c"] = "1" if comp else "0"
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for (key, value) in list(self.postVars.items()):
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buf.write(bdry + b"\r\n")
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buf.write(
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(
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'Content-Disposition: form-data; name="%s"\r\n\r\n%s\r\n'
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% (key, value)
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).encode("utf8")
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)
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# payload as raw data or json
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rawSize = 0
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if fobj:
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# header
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buf.write(bdry + b"\r\n")
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buf.write(
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b"""\
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Content-Disposition: form-data; name="data"; filename="data"\r\n\
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Content-Type: application/octet-stream\r\n\r\n"""
|
|
)
|
|
# write file into buffer, optionally compressing
|
|
if comp:
|
|
tgt = gzip.GzipFile(mode="wb", fileobj=buf, compresslevel=comp)
|
|
else:
|
|
tgt = buf # type: ignore
|
|
while 1:
|
|
data = fobj.read(65536)
|
|
if not data:
|
|
if comp:
|
|
tgt.close()
|
|
break
|
|
rawSize += len(data)
|
|
tgt.write(data)
|
|
buf.write(b"\r\n")
|
|
buf.write(bdry + b"--\r\n")
|
|
size = buf.tell()
|
|
# connection headers
|
|
headers = {
|
|
"Content-Type": "multipart/form-data; boundary=%s"
|
|
% BOUNDARY.decode("utf8"),
|
|
"Content-Length": str(size),
|
|
}
|
|
buf.seek(0)
|
|
|
|
if size >= 100 * 1024 * 1024 or rawSize >= 250 * 1024 * 1024:
|
|
raise Exception("Collection too large to upload to AnkiWeb.")
|
|
|
|
return headers, buf
|
|
|
|
def req(self, method, fobj=None, comp=6, badAuthRaises=True) -> Any:
|
|
headers, body = self._buildPostData(fobj, comp)
|
|
|
|
r = self.client.post(self.syncURL() + method, data=body, headers=headers)
|
|
if not badAuthRaises and r.status_code == 403:
|
|
return False
|
|
self.assertOk(r)
|
|
|
|
buf = self.client.streamContent(r)
|
|
return buf
|
|
|
|
|
|
# Incremental sync over HTTP
|
|
######################################################################
|
|
|
|
|
|
class RemoteServer(HttpSyncer):
|
|
def __init__(self, hkey, hostNum) -> None:
|
|
HttpSyncer.__init__(self, hkey, hostNum=hostNum)
|
|
|
|
def hostKey(self, user, pw) -> Any:
|
|
"Returns hkey or none if user/pw incorrect."
|
|
self.postVars = dict()
|
|
ret = self.req(
|
|
"hostKey",
|
|
io.BytesIO(json.dumps(dict(u=user, p=pw)).encode("utf8")),
|
|
badAuthRaises=False,
|
|
)
|
|
if not ret:
|
|
# invalid auth
|
|
return
|
|
self.hkey = json.loads(ret.decode("utf8"))["key"]
|
|
return self.hkey
|
|
|
|
def meta(self) -> Any:
|
|
self.postVars = dict(k=self.hkey, s=self.skey,)
|
|
ret = self.req(
|
|
"meta",
|
|
io.BytesIO(
|
|
json.dumps(
|
|
dict(
|
|
v=SYNC_VER,
|
|
cv="ankidesktop,%s,%s" % (versionWithBuild(), platDesc()),
|
|
)
|
|
).encode("utf8")
|
|
),
|
|
badAuthRaises=False,
|
|
)
|
|
if not ret:
|
|
# invalid auth
|
|
return
|
|
return json.loads(ret.decode("utf8"))
|
|
|
|
def applyGraves(self, **kw) -> Any:
|
|
return self._run("applyGraves", kw)
|
|
|
|
def applyChanges(self, **kw) -> Any:
|
|
return self._run("applyChanges", kw)
|
|
|
|
def start(self, **kw) -> Any:
|
|
return self._run("start", kw)
|
|
|
|
def chunk(self, **kw) -> Any:
|
|
return self._run("chunk", kw)
|
|
|
|
def applyChunk(self, **kw) -> Any:
|
|
return self._run("applyChunk", kw)
|
|
|
|
def sanityCheck2(self, **kw) -> Any:
|
|
return self._run("sanityCheck2", kw)
|
|
|
|
def finish(self, **kw) -> Any:
|
|
return self._run("finish", kw)
|
|
|
|
def abort(self, **kw) -> Any:
|
|
return self._run("abort", kw)
|
|
|
|
def _run(self, cmd: str, data: Any) -> Any:
|
|
return json.loads(
|
|
self.req(cmd, io.BytesIO(json.dumps(data).encode("utf8"))).decode("utf8")
|
|
)
|
|
|
|
|
|
# Full syncing
|
|
##########################################################################
|
|
|
|
|
|
class FullSyncer(HttpSyncer):
|
|
def __init__(self, col, hkey, client, hostNum) -> None:
|
|
HttpSyncer.__init__(self, hkey, client, hostNum=hostNum)
|
|
self.postVars = dict(
|
|
k=self.hkey, v="ankidesktop,%s,%s" % (anki.version, platDesc()),
|
|
)
|
|
self.col = col.weakref()
|
|
|
|
def download(self) -> Optional[str]:
|
|
hooks.sync_stage_did_change("download")
|
|
localNotEmpty = self.col.db.scalar("select 1 from cards")
|
|
self.col.close()
|
|
cont = self.req("download")
|
|
tpath = self.col.path + ".tmp"
|
|
if cont == "upgradeRequired":
|
|
hooks.sync_stage_did_change("upgradeRequired")
|
|
return None
|
|
open(tpath, "wb").write(cont)
|
|
# check the received file is ok
|
|
d = DB(tpath)
|
|
assert d.scalar("pragma integrity_check") == "ok"
|
|
remoteEmpty = not d.scalar("select 1 from cards")
|
|
d.close()
|
|
# accidental clobber?
|
|
if localNotEmpty and remoteEmpty:
|
|
os.unlink(tpath)
|
|
return "downloadClobber"
|
|
# overwrite existing collection
|
|
os.unlink(self.col.path)
|
|
os.rename(tpath, self.col.path)
|
|
self.col = None
|
|
return None
|
|
|
|
def upload(self) -> bool:
|
|
"True if upload successful."
|
|
hooks.sync_stage_did_change("upload")
|
|
# make sure it's ok before we try to upload
|
|
if self.col.db.scalar("pragma integrity_check") != "ok":
|
|
return False
|
|
if not self.col.basicCheck():
|
|
return False
|
|
# apply some adjustments, then upload
|
|
self.col.beforeUpload()
|
|
if self.req("upload", open(self.col.path, "rb")) != b"OK":
|
|
return False
|
|
return True
|