mirror of
https://github.com/codeninjasllc/codecombat.git
synced 2024-11-28 01:55:38 -05:00
268 lines
8.3 KiB
CoffeeScript
268 lines
8.3 KiB
CoffeeScript
module.exports = class SuperModel extends Backbone.Model
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constructor: ->
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@num = 0
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@denom = 0
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@progress = 0
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@resources = {}
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@rid = 0
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@maxProgress = 1
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@models = {}
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@collections = {}
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# Since the supermodel has undergone some changes into being a loader and a cache interface,
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# it's a bit wonky to use. The next couple functions are meant to cover the majority of
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# use cases across the site. If they are used, the view will automatically handle errors,
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# retries, progress, and filling the cache. Note that the resource it passes back will not
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# necessarily have the same model or collection that was passed in, if it was fetched from
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# the cache.
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report: ->
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# Useful for debugging why a SuperModel never finishes loading.
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console.info 'SuperModel report ------------------------'
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console.info "#{_.values(@resources).length} resources."
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unfinished = []
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for resource in _.values(@resources) when resource
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console.info "\t", resource.name, 'loaded', resource.isLoaded
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unfinished.push resource unless resource.isLoaded
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unfinished
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loadModel: (model, name, fetchOptions, value=1) ->
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cachedModel = @getModelByURL(model.getURL())
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if cachedModel
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if cachedModel.loaded
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res = @addModelResource(cachedModel, name, fetchOptions, 0)
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res.markLoaded()
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return res
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else
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res = @addModelResource(cachedModel, name, fetchOptions, value)
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res.markLoading()
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return res
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else
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@registerModel(model)
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res = @addModelResource(model, name, fetchOptions, value)
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if model.loaded then res.markLoaded() else res.load()
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return res
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loadCollection: (collection, name, fetchOptions, value=1) ->
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url = collection.getURL()
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if cachedCollection = @collections[url]
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console.debug 'Collection cache hit', url, 'already loaded', cachedCollection.loaded
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if cachedCollection.loaded
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res = @addModelResource(cachedCollection, name, fetchOptions, 0)
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res.markLoaded()
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return res
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else
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res = @addModelResource(cachedCollection, name, fetchOptions, value)
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res.markLoading()
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return res
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else
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@addCollection collection
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@listenToOnce collection, 'sync', (c) ->
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console.debug 'Registering collection', url
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@registerCollection c
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res = @addModelResource(collection, name, fetchOptions, value)
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res.load() if not (res.isLoading or res.isLoaded)
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return res
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# replace or overwrite
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shouldSaveBackups: (model) -> false
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# Caching logic
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getModel: (ModelClass_or_url, id) ->
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return @getModelByURL(ModelClass_or_url) if _.isString(ModelClass_or_url)
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m = new ModelClass_or_url(_id: id)
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return @getModelByURL(m.getURL())
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getModelByURL: (modelURL) ->
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modelURL = modelURL() if _.isFunction(modelURL)
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return @models[modelURL] or null
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getModelByOriginal: (ModelClass, original) ->
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_.find @models, (m) ->
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m.get('original') is original and m.constructor.className is ModelClass.className
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getModelByOriginalAndMajorVersion: (ModelClass, original, majorVersion=0) ->
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_.find @models, (m) ->
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m.get('original') is original and m.get('version').major is majorVersion and m.constructor.className is ModelClass.className
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getModels: (ModelClass) ->
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# can't use instanceof. SuperModel gets passed between windows, and one window
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# will have different class objects than another window.
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# So compare className instead.
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return (m for key, m of @models when m.constructor.className is ModelClass.className) if ModelClass
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return _.values @models
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registerModel: (model) ->
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@models[model.getURL()] = model
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getCollection: (collection) ->
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return @collections[collection.getURL()] or collection
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addCollection: (collection) ->
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# TODO: remove, instead just use registerCollection?
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url = collection.getURL()
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if @collections[url]? and @collections[url] isnt collection
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return console.warn "Tried to add Collection '#{url}' to SuperModel when we already had it."
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@registerCollection(collection)
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registerCollection: (collection) ->
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@collections[collection.getURL()] = collection if collection.isCachable
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# consolidate models
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for model, i in collection.models
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cachedModel = @getModelByURL(model.getURL())
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if cachedModel
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collection.models[i] = cachedModel
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else
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@registerModel(model)
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collection
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# Tracking resources being loaded for this supermodel
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finished: ->
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return @progress is 1.0 or not @denom
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addModelResource: (modelOrCollection, name, fetchOptions, value=1) ->
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modelOrCollection.saveBackups = modelOrCollection.saveBackups or @shouldSaveBackups(modelOrCollection)
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@checkName(name)
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res = new ModelResource(modelOrCollection, name, fetchOptions, value)
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@storeResource(res, value)
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return res
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removeModelResource: (modelOrCollection) ->
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@removeResource _.find(@resources, (resource) -> resource?.model is modelOrCollection)
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addRequestResource: (name, jqxhrOptions, value=1) ->
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@checkName(name)
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res = new RequestResource(name, jqxhrOptions, value)
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@storeResource(res, value)
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return res
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addSomethingResource: (name, value=1) ->
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@checkName(name)
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res = new SomethingResource(name, value)
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@storeResource(res, value)
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return res
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checkName: (name) ->
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if not name
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throw new Error('Resource name should not be empty.')
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storeResource: (resource, value) ->
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@rid++
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resource.rid = @rid
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@resources[@rid] = resource
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@listenToOnce(resource, 'loaded', @onResourceLoaded)
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@listenTo(resource, 'failed', @onResourceFailed)
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@denom += value
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_.defer @updateProgress if @denom
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removeResource: (resource) ->
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return unless @resources[resource.rid]
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@resources[resource.rid] = null
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--@num if resource.isLoaded
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--@denom
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_.defer @updateProgress
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onResourceLoaded: (r) ->
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return unless @resources[r.rid]
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@num += r.value
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_.defer @updateProgress
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r.clean()
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@trigger 'resource-loaded', r
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onResourceFailed: (r) ->
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return unless @resources[r.rid]
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@trigger('failed', resource: r)
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r.clean()
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updateProgress: =>
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# Because this is _.defer'd, this might end up getting called after
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# a bunch of things load all at once.
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# So make sure we only emit events if @progress has changed.
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newProg = if @denom then @num / @denom else 1
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newProg = Math.min @maxProgress, newProg
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return if @progress >= newProg
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@progress = newProg
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@trigger('update-progress', @progress)
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@trigger('loaded-all') if @finished()
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setMaxProgress: (@maxProgress) ->
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resetProgress: -> @progress = 0
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clearMaxProgress: ->
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@maxProgress = 1
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_.defer @updateProgress
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getProgress: -> return @progress
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getResource: (rid) ->
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return @resources[rid]
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class Resource extends Backbone.Model
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constructor: (name, value=1) ->
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@name = name
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@value = value
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@rid = -1 # Used for checking state and reloading
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@isLoading = false
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@isLoaded = false
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@model = null
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@jqxhr = null
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markLoaded: ->
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return if @isLoaded
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@trigger('loaded', @)
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@isLoaded = true
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@isLoading = false
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markFailed: ->
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return if @isLoaded
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@trigger('failed', @)
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@isLoaded = @isLoading = false
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@isFailed = true
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markLoading: ->
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@isLoaded = @isFailed = false
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@isLoading = true
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clean: ->
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# request objects get rather large. Clean them up after the request is finished.
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@jqxhr = null
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load: -> @
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class ModelResource extends Resource
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constructor: (modelOrCollection, name, fetchOptions, value)->
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super(name, value)
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@model = modelOrCollection
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@fetchOptions = fetchOptions
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@jqxhr = @model.jqxhr
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load: ->
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@markLoading()
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@fetchModel()
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@
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fetchModel: ->
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@jqxhr = @model.fetch(@fetchOptions) unless @model.loading
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@listenToOnce @model, 'sync', -> @markLoaded()
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@listenToOnce @model, 'error', -> @markFailed()
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clean: ->
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@jqxhr = null
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@model.jqxhr = null
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class RequestResource extends Resource
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constructor: (name, jqxhrOptions, value) ->
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super(name, value)
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@jqxhrOptions = jqxhrOptions
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load: ->
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@markLoading()
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@jqxhr = $.ajax(@jqxhrOptions)
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# make sure any other success/fail callbacks happen before resource loaded callbacks
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@jqxhr.done => _.defer => @markLoaded()
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@jqxhr.fail => _.defer => @markFailed()
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@
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class SomethingResource extends Resource
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