mirror of
https://github.com/codeninjasllc/codecombat.git
synced 2024-11-24 08:08:15 -05:00
182 lines
No EOL
6.9 KiB
CoffeeScript
182 lines
No EOL
6.9 KiB
CoffeeScript
SystemNameLoader = require './../core/SystemNameLoader'
|
|
###
|
|
Good-to-knows:
|
|
dataPath: an array of keys that walks you up a JSON object that's being patched
|
|
ex: ['scripts', 0, 'description']
|
|
deltaPath: an array of keys that walks you up a JSON Diff Patch object.
|
|
ex: ['scripts', '_0', 'description']
|
|
###
|
|
|
|
module.exports.expandDelta = (delta, left, schema) ->
|
|
flattenedDeltas = flattenDelta(delta)
|
|
(expandFlattenedDelta(fd, left, schema) for fd in flattenedDeltas)
|
|
|
|
|
|
module.exports.flattenDelta = flattenDelta = (delta, dataPath=null, deltaPath=null) ->
|
|
# takes a single jsondiffpatch delta and returns an array of objects with
|
|
return [] unless delta
|
|
dataPath ?= []
|
|
deltaPath ?= []
|
|
return [{dataPath: dataPath, deltaPath: deltaPath, o: delta}] if _.isArray delta
|
|
|
|
results = []
|
|
affectingArray = delta._t is 'a'
|
|
for deltaIndex, childDelta of delta
|
|
continue if deltaIndex is '_t'
|
|
dataIndex = if affectingArray then parseInt(deltaIndex.replace('_', '')) else deltaIndex
|
|
results = results.concat flattenDelta(
|
|
childDelta, dataPath.concat([dataIndex]), deltaPath.concat([deltaIndex]))
|
|
results
|
|
|
|
|
|
expandFlattenedDelta = (delta, left, schema) ->
|
|
# takes a single flattened delta and converts into an object that can be
|
|
# easily formatted into something human readable.
|
|
|
|
delta.action = '???'
|
|
o = delta.o # the raw jsondiffpatch delta
|
|
|
|
if _.isArray(o) and o.length is 1
|
|
delta.action = 'added'
|
|
delta.newValue = o[0]
|
|
|
|
if _.isArray(o) and o.length is 2
|
|
delta.action = 'modified'
|
|
delta.oldValue = o[0]
|
|
delta.newValue = o[1]
|
|
|
|
if _.isArray(o) and o.length is 3 and o[1] is 0 and o[2] is 0
|
|
delta.action = 'deleted'
|
|
delta.oldValue = o[0]
|
|
|
|
if _.isPlainObject(o) and o._t is 'a'
|
|
delta.action = 'modified-array'
|
|
|
|
if _.isPlainObject(o) and o._t isnt 'a'
|
|
delta.action = 'modified-object'
|
|
|
|
if _.isArray(o) and o.length is 3 and o[2] is 3
|
|
delta.action = 'moved-index'
|
|
delta.destinationIndex = o[1]
|
|
delta.originalIndex = delta.dataPath[delta.dataPath.length-1]
|
|
|
|
if _.isArray(o) and o.length is 3 and o[1] is 0 and o[2] is 2
|
|
delta.action = 'text-diff'
|
|
delta.unidiff = o[0]
|
|
|
|
humanPath = []
|
|
parentLeft = left
|
|
parentSchema = schema
|
|
for key, i in delta.dataPath
|
|
# TODO: Better schema/json walking
|
|
childSchema = parentSchema?.items or parentSchema?.properties?[key] or {}
|
|
childLeft = parentLeft?[key]
|
|
humanKey = null
|
|
childData = if i is delta.dataPath.length-1 and delta.action is 'added' then o[0] else childLeft
|
|
humanKey ?= childData.name or childData.id if childData
|
|
humanKey ?= SystemNameLoader.getName(childData?.original)
|
|
humanKey ?= "#{childSchema.title}" if childSchema.title
|
|
humanKey ?= _.string.titleize key
|
|
humanPath.push humanKey
|
|
parentLeft = childLeft
|
|
parentSchema = childSchema
|
|
|
|
delta.humanPath = humanPath.join(' :: ')
|
|
delta.schema = childSchema
|
|
delta.left = childLeft
|
|
delta.right = jsondiffpatch.patch childLeft, delta.o unless delta.action is 'moved-index'
|
|
|
|
delta
|
|
|
|
module.exports.makeJSONDiffer = ->
|
|
hasher = (obj) -> if obj? then obj.name or obj.id or obj._id or JSON.stringify(_.keys(obj)) else 'null'
|
|
jsondiffpatch.create({objectHash: hasher})
|
|
|
|
module.exports.getConflicts = (headDeltas, pendingDeltas) ->
|
|
# headDeltas and pendingDeltas should be lists of deltas returned by expandDelta
|
|
# Returns a list of conflict objects with properties:
|
|
# headDelta
|
|
# pendingDelta
|
|
# The deltas that have conflicts also have conflict properties pointing to one another.
|
|
|
|
headPathMap = groupDeltasByAffectingPaths(headDeltas)
|
|
pendingPathMap = groupDeltasByAffectingPaths(pendingDeltas)
|
|
paths = _.keys(headPathMap).concat(_.keys(pendingPathMap))
|
|
|
|
# Here's my thinking: conflicts happen when one delta path is a substring of another delta path
|
|
# So, sort paths from both deltas together, which will naturally make conflicts adjacent,
|
|
# and if one is identified AND one path is from the headDeltas AND the other is from pendingDeltas
|
|
# This is all to avoid an O(nm) brute force search.
|
|
|
|
conflicts = []
|
|
paths.sort()
|
|
for path, i in paths
|
|
offset = 1
|
|
while i + offset < paths.length
|
|
# Look at the neighbor
|
|
nextPath = paths[i+offset]
|
|
offset += 1
|
|
|
|
# these stop being substrings of each other? Then conflict DNE
|
|
if not (_.string.startsWith nextPath, path) then break
|
|
|
|
# check if these two are from the same group, but we still need to check for more beyond
|
|
unless headPathMap[path] or headPathMap[nextPath] then continue
|
|
unless pendingPathMap[path] or pendingPathMap[nextPath] then continue
|
|
|
|
# Okay, we found two deltas from different groups which conflict
|
|
for headMetaDelta in (headPathMap[path] or headPathMap[nextPath])
|
|
headDelta = headMetaDelta.delta
|
|
for pendingMetaDelta in (pendingPathMap[path] or pendingPathMap[nextPath])
|
|
pendingDelta = pendingMetaDelta.delta
|
|
conflicts.push({headDelta: headDelta, pendingDelta: pendingDelta})
|
|
pendingDelta.conflict = headDelta
|
|
headDelta.conflict = pendingDelta
|
|
|
|
return conflicts if conflicts.length
|
|
|
|
groupDeltasByAffectingPaths = (deltas) ->
|
|
metaDeltas = []
|
|
for delta in deltas
|
|
conflictPaths = []
|
|
# We're being fairly liberal with what's a conflict, because the alternative is worse
|
|
if delta.action is 'moved-index'
|
|
# If you moved items around in an array, mark the whole array as a gonner
|
|
conflictPaths.push delta.dataPath.slice(0, delta.dataPath.length-1)
|
|
else if delta.action in ['deleted', 'added'] and _.isNumber(delta.dataPath[delta.dataPath.length-1])
|
|
# If you remove or add items in an array, mark the whole thing as a gonner
|
|
conflictPaths.push delta.dataPath.slice(0, delta.dataPath.length-1)
|
|
else
|
|
conflictPaths.push delta.dataPath
|
|
for path in conflictPaths
|
|
metaDeltas.push {
|
|
delta: delta
|
|
path: (item.toString() for item in path).join('/')
|
|
}
|
|
|
|
map = _.groupBy metaDeltas, 'path'
|
|
return map
|
|
|
|
module.exports.pruneConflictsFromDelta = (delta, conflicts) ->
|
|
expandedDeltas = (conflict.pendingDelta for conflict in conflicts)
|
|
module.exports.pruneExpandedDeltasFromDelta delta, expandedDeltas
|
|
|
|
module.exports.pruneExpandedDeltasFromDelta = (delta, expandedDeltas) ->
|
|
# the jsondiffpatch delta mustn't include any dangling nodes,
|
|
# or else things will get removed which shouldn't be, or errors will occur
|
|
for expandedDelta in expandedDeltas
|
|
prunePath delta, expandedDelta.deltaPath
|
|
if _.isEmpty delta then undefined else delta
|
|
|
|
prunePath = (delta, path) ->
|
|
if path.length is 1
|
|
delete delta[path] unless delta[path] is undefined
|
|
else
|
|
prunePath delta[path[0]], path.slice(1) unless delta[path[0]] is undefined
|
|
keys = (k for k in _.keys(delta[path[0]]) when k isnt '_t')
|
|
delete delta[path[0]] if keys.length is 0
|
|
|
|
module.exports.DOC_SKIP_PATHS = [
|
|
'_id','version', 'commitMessage', 'parent', 'created',
|
|
'slug', 'index', '__v', 'patches', 'creator', 'js', 'watchers', 'levelsUpdated'
|
|
] |