Show old difficulty instead of new difficulty when observing a replayable success. This will likely need revisiting when we are using observing for more than just leaderboards.

app/lib/LevelLoader.coffee

@@ -32,6 +32,7 @@ module.exports = class LevelLoader extends CocoClass
     @team = options.team
     @headless = options.headless
     @spectateMode = options.spectateMode ? false
+    @observing = options.observing
 
     @worldNecessities = []
     @listenTo @supermodel, 'resource-loaded', @onWorldNecessityLoaded
@@ -389,6 +390,8 @@ module.exports = class LevelLoader extends CocoClass
     @world.submissionCount = @session?.get('state')?.submissionCount ? 0
     @world.flagHistory = @session?.get('state')?.flagHistory ? []
     @world.difficulty = @session?.get('state')?.difficulty ? 0
+    if @observing
+      @world.difficulty = Math.max 0, @world.difficulty - 1  # Show the difficulty they won, not the next one.
     serializedLevel = @level.serialize(@supermodel, @session, @opponentSession)
     @world.loadFromLevel serializedLevel, false
     console.log 'World has been initialized from level loader.'

app/views/play/level/ControlBarView.coffee

@@ -64,6 +64,8 @@ module.exports = class ControlBarView extends CocoView
       c.multiplayerStatus = @multiplayerStatusManager?.status
     if @level.get 'replayable'
       c.levelDifficulty = @session.get('state')?.difficulty ? 0
+      if @observing
+        c.levelDifficulty = Math.max 0, c.levelDifficulty - 1  # Show the difficulty they won, not the next one.
       c.difficultyTitle = "#{$.i18n.t 'play.level_difficulty'}#{c.levelDifficulty}"
       @lastDifficulty = c.levelDifficulty
     c.spectateGame = @spectateGame

app/views/play/level/PlayLevelView.coffee

@@ -127,7 +127,7 @@ module.exports = class PlayLevelView extends RootView
   load: ->
     @loadStartTime = new Date()
     @god = new God debugWorker: true
-    @levelLoader = new LevelLoader supermodel: @supermodel, levelID: @levelID, sessionID: @sessionID, opponentSessionID: @opponentSessionID, team: @getQueryVariable('team')
+    @levelLoader = new LevelLoader supermodel: @supermodel, levelID: @levelID, sessionID: @sessionID, opponentSessionID: @opponentSessionID, team: @getQueryVariable('team'), observing: @observing
     @listenToOnce @levelLoader, 'world-necessities-loaded', @onWorldNecessitiesLoaded
 
   trackLevelLoadEnd: ->

app/views/play/level/tome/TomeView.coffee

@@ -166,7 +166,10 @@ module.exports = class TomeView extends CocoView
       sessionState.flagHistory = _.filter sessionState.flagHistory ? [], (event) => event.team isnt (@options.session.get('team') ? 'humans')
       sessionState.lastUnsuccessfulSubmissionTime = new Date() if @options.level.get 'replayable'
       @options.session.set 'state', sessionState
-    Backbone.Mediator.publish 'tome:cast-spells', spells: @spells, preload: preload, realTime: realTime, submissionCount: sessionState.submissionCount ? 0, flagHistory: sessionState.flagHistory ? [], difficulty: sessionState.difficulty ? 0
+    difficulty = sessionState.difficulty ? 0
+    if @options.observing
+      difficulty = Math.max 0, difficulty - 1  # Show the difficulty they won, not the next one.
+    Backbone.Mediator.publish 'tome:cast-spells', spells: @spells, preload: preload, realTime: realTime, submissionCount: sessionState.submissionCount ? 0, flagHistory: sessionState.flagHistory ? [], difficulty: difficulty
 
   onToggleSpellList: (e) ->
     @spellList.rerenderEntries()