55 lines
1.3 KiB
CoffeeScript
55 lines
1.3 KiB
CoffeeScript
Discourse.Onebox = (->
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# for now it only stores in a var, in future we can change it so it uses localStorage,
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# trouble with localStorage is that expire semantics need some thinking
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#cacheKey = "__onebox__"
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localCache = {}
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cache = (url, contents) ->
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localCache[url] = contents
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null
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lookupCache = (url) ->
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cached = localCache[url]
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if cached && cached.then # its a promise
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null
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else
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cached
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lookup = (url, refresh, callback) ->
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cached = localCache[url]
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cached = null if refresh && cached && !cached.then
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if cached
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if cached.then
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cached.then(callback(lookupCache(url)))
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else
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callback(cached)
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return false
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else
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cache(url, $.get "/onebox", url: url, refresh: refresh, (html) ->
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cache(url,html)
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callback(html)
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)
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return true
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load = (e, refresh=false) ->
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url = e.href
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$elem = $(e)
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return if $elem.data('onebox-loaded')
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loading = lookup url, refresh, (html) ->
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$elem.removeClass('loading-onebox')
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$elem.data('onebox-loaded')
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return unless html
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return unless html.trim().length > 0
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$elem.replaceWith(html)
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$elem.addClass('loading-onebox') if loading
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load: load
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lookup: lookup
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lookupCache: lookupCache
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)()
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