Refactor Options constructor into loadOptions and init methods.

omega-target-chromium-extension/omega_target_web.coffee

@@ -136,5 +136,7 @@ angular.module('omegaTarget', []).factory 'omegaTarget', ($q) ->
       return d.promise
     openManage: ->
       chrome.tabs.create url: 'chrome://extensions/?id=' + chrome.runtime.id
+    setOptionsSync: (enabled, args) ->
+      callBackground('setOptionsSync', enabled, args)
 
   return omegaTarget

omega-target-chromium-extension/src/options.coffee

@@ -237,13 +237,13 @@ class ChromeOptions extends OmegaTarget.Options
       else
         Promise.reject()
 
-      getOldOptions = getOldOptions.catch =>
+      getOldOptions = getOldOptions.catch ->
         if options?['config']
           Promise.resolve options
         else if localStorage['config']
           Promise.resolve localStorage
         else
-          Promise.reject new @NoOptionsError()
+          Promise.reject new OmegaTarget.Options.NoOptionsError()
 
       getOldOptions.then (oldOptions) =>
         i18n = {

omega-target/src/options.coffee

@@ -55,48 +55,99 @@ class Options
         value = profile
     return value
 
-  constructor: (@_options, @_storage, @_state, @log, @sync) ->
+  constructor: (options, @_storage, @_state, @log, @sync) ->
     @_storage ?= Storage()
     @_state ?= Storage()
     @log ?= Log
-    if @_options?
-      @ready = Promise.resolve(@_options)
+    if not options?
+      @init()
     else
-      @ready = if @sync?.enabled then Promise.resolve() else @_storage.get(null)
-      @ready = @ready.then (options) =>
-        return options if not @sync?
-        if options?['schemaVersion']
-          @_state.get({'syncOptions': ''}).then ({syncOptions}) =>
-            return if syncOptions
-            @_state.set({'syncOptions': 'conflict'})
-            @sync.storage.get('schemaVersion').then({schemaVersion}) =>
-              @_state.set({'syncOptions': 'pristine'}) if not schemaVersion
-          return options
+      @ready = @_storage.remove().then(=>
+        @_storage.set(options)
+      ).then =>
+        @init()
+
+  ###*
+  # Attempt to load options from local and remote storage.
+  # @param {?{}} args Extra arguments
+  # @param {number=3} args.retry Number of retries before giving up.
+  # @returns {Promise<OmegaOptions>} The loaded options
+  ###
+  loadOptions: ({retry} = {}) ->
+    retry ?= 3
+    @_syncWatchStop?()
+    @_syncWatchStop = null
+    @_watchStop?()
+    @_watchStop = null
+
+    loadRaw = if options? then Promise.resolve(options) else
+      if not @sync?.enabled
+        if not @sync?
+          @_state.set({'syncOptions': 'unsupported'})
+        @_storage.get(null)
+      else
         @_state.set({'syncOptions': 'sync'})
-        @sync.watchAndPull(@_storage)
+        @_syncWatchStop = @sync.watchAndPull(@_storage)
         @sync.copyTo(@_storage).then =>
           @_storage.get(null)
-    @ready = @ready.then((options) =>
-      @upgrade(options).then(([options, changes]) =>
-        modified = {}
-        removed = []
-        for own key, value of changes
-          if typeof value == 'undefined'
-            removed.push(value)
-          else
-            modified[key] = value
-        @_storage.set(modified).then(=>
-          @_storage.remove(removed)
-        ).return(options)
-      ).catch (ex) =>
-        if not ex instanceof NoOptionsError
-          @log.error(ex.stack)
-        @reset().tap =>
-          @_state.set({'firstRun': 'new', 'web.switchGuide': 'showOnFirstUse'})
-    ).then((options) =>
+
+    @optionsLoaded = loadRaw.then((options) =>
+      @upgrade(options)
+    ).then(([options, changes]) =>
+      @_storage.apply(changes: changes).return(options)
+    ).tap((options) =>
       @_options = options
-      @_watch()
-    ).then(=>
+      @_watchStop = @_watch()
+      # Try to set syncOptions to some value if not initialized.
+      @_state.get({'syncOptions': ''}).then ({syncOptions}) =>
+        return if syncOptions
+        @_state.set({'syncOptions': 'conflict'})
+        @sync.storage.get('schemaVersion').then ({schemaVersion}) =>
+          @_state.set({'syncOptions': 'pristine'}) if not schemaVersion
+    ).catch (e) =>
+      return Promise.reject(e) unless retry > 0
+
+      getFallbackOptions = Promise.resolve().then =>
+        if e instanceof NoOptionsError
+          @_state.get({
+            'firstRun': 'new'
+            'web.switchGuide': 'showOnFirstUse'
+          }).then (items) => @_state.set(items)
+          return null unless @sync?
+          # Try to fetch options from sync storage.
+          return @sync.storage.get(null).then (options) =>
+            if not options['schemaVersion']
+              @_state.set({'syncOptions': 'pristine'})
+              return null
+            else
+              @_state.set({'syncOptions': 'sync'})
+              @sync.enabled = true
+              @log.log('Options#loadOptions::fromSync', options)
+              options
+        else
+          @log.error(e.stack)
+          # Some serious error happened when loading options. Disable syncing
+          # and use fallback options.
+          @_state.remove(['syncOptions'])
+          return null
+
+      getFallbackOptions.then (options) =>
+        options ?= @parseOptions(@getDefaultOptions())
+        if @sync?
+          prevEnabled = @sync.enabled
+          @sync.enabled = false
+        @_storage.remove().then(=>
+          @_storage.set(options)
+        ).then =>
+          @sync.enabled = prevEnabled if @sync?
+          @loadOptions({retry: retry - 1})
+
+  ###*
+  # Attempt to initialize (or reinitialize) options.
+  # @returns {Promise<OmegaOptions>} A promise that is fulfilled on ready.
+  ###
+  init: ->
+    @ready = @loadOptions().then(=>
       if @_options['-startupProfileName']
         @applyProfile(@_options['-startupProfileName'])
       else
@@ -125,6 +176,8 @@ class Options
       if @_options['-downloadInterval'] > 0
         @updateProfile()
 
+    return @ready
+
   toString: -> "<Options>"
 
   ###*
@@ -173,14 +226,11 @@ class Options
       Promise.reject new Error("Invalid schemaVerion #{version}!")
 
   ###*
-  # Reset the options to the given options or initial options.
-  # @param {?OmegaOptions} options The options to set. Defaults to initial.
-  # @returns {Promise<OmegaOptions>} The options just applied
+  # Parse options in various formats (including JSON & base64).
+  # @param {OmegaOptions|string} options The options to parse
+  # @returns {Promise<OmegaOptions>} The parsed options.
   ###
-  reset: (options) ->
-    @log.method('Options#reset', this, arguments)
-    if not options
-      options = @getDefaultOptions()
+  parseOptions: (options) ->
     if typeof options == 'string'
       if options[0] != '{'
         try
@@ -190,11 +240,26 @@ class Options
           options = null
       options = try JSON.parse(options)
     if not options
-      return Promise.reject new Error('Invalid options!')
-    @upgrade(options).then ([opt]) =>
+      return throw new Error('Invalid options!')
+
+    return options
+
+  ###*
+  # Reset the options to the given options or initial options.
+  # @param {?OmegaOptions} options The options to set. Defaults to initial.
+  # @returns {Promise<OmegaOptions>} The options just applied
+  ###
+  reset: (options) ->
+    @log.method('Options#reset', this, arguments)
+    options ?= getDefaultOptions()
+    @upgrade(@parseOptions(options)).then ([opt]) =>
+      # Disable syncing when resetting to avoid affecting sync storage.
+      @sync.enabled = false if @sync?
+      @_state.remove(['syncOptions'])
       @_storage.remove().then(=>
         @_storage.set(opt)
-      ).then -> opt
+      ).then =>
+        @init()
 
   ###*
   # Called on the first initialization of options.
@@ -856,4 +921,44 @@ class Options
       @currentProfileChanged('external')
       return
 
+  ###*
+  # Switch options syncing on and off.
+  # @param {boolean} enabled Whether to enable syncing
+  # @param {?{}} args Extra arguments
+  # @param {boolean=false} args.force If true, overwrite options when conflict
+  # @returns {Promise} A promise which is fulfilled when the syncing is switched
+  ###
+  setOptionsSync: (enabled, args) ->
+    @log.method('Options#setOptionsSync', this, arguments)
+    if not @sync?
+      return Promise.reject(new Error('Options syncing is unsupported.'))
+    @_state.get({'syncOptions': ''}).then ({syncOptions}) =>
+      if not enabled
+        if syncOptions == 'sync'
+          @_state.set({'syncOptions': 'conflict'})
+        @sync.enabled = false
+        @_syncWatchStop?()
+        @_syncWatchStop = null
+        return
+
+      if syncOptions == 'conflict'
+        if not args?.force
+          return Promise.reject(new Error(
+            'Syncing not enabled due to conflict. Retry with force to overwrite
+            local options and enable syncing.'))
+      return if syncOptions == 'sync'
+      @_state.set({'syncOptions': 'sync'}).then =>
+        if syncOptions == 'conflict'
+          # Try to re-init options from sync.
+          @sync.enabled = false
+          @_storage.remove().then =>
+            @sync.enabled = true
+            @init()
+        else
+          @sync.enabled = true
+          @_syncWatchStop?()
+          @sync.requestPush(@_options)
+          @_syncWatchStop = @sync.watchAndPull(@_storage)
+          return
+
 module.exports = Options