git ssb

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var marksum = require('markdown-summary')
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var nest = require('depnest')
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exports.gives = nest({
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  'blog.html.title': true,
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  'blog.html.summary': true,
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  'blog.html.thumbnail': true,
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  'blog.html.content': true,
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})
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exports.needs = nest({
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  'message.html.markdown': 'first',
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})
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exports.create = function (api) {
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  function fromPost(fn) {
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    return function (data) {
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      if('post' !== data.value.content.type) return
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      return api.message.html.markdown ({text: fn(data.value.content)})
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    }
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  }
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  return nest({
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    'blog.html.title': fromPost(function (content) {
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      return content.title || marksum.title(content.text)
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    }),
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    'blog.html.summary': fromPost(function (content) {
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      return content.summary || marksum.summary(content.text)
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    }),
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    'blog.html.thumbnail': function (data) {
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      if('post' !== data.value.content.type) return
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      var content = data.value.content
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      if(content.thumbnail) return content.thumbnail
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      var img = marksum.image(content.text)
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      var m = /\!\[[^]+\]\(([^\)]+)\)/.exec(img)
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      if(m) return m[1]
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    },
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    'blog.html.content': fromPost(function (content) {
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      return content.text
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    })
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  })
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}
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