git ssb

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var marksum = require('markdown-summary')
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//var markdown = require('ssb-markdown')
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exports.gives = {
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  message: {
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    html: {
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      title: true,
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      summary: true,
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      thumbnail: true,
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      content: true
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    }
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  }
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}
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exports.needs = {
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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 render (source) {
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    return markdown.block(source, {
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      emoji: (emoji) => {
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        return renderEmoji(emoji, api.emoji.sync.url(emoji))
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      },
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      toUrl: (id) => {
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        if (ref.isBlob(id)) return api.blob.sync.url(id)
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        return id
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      },
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      imageLink: (id) => id
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    })
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  }
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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 {
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    message: {
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      html: {
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        title: fromPost(function (content) {
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          return content.title || marksum.title(content.text)
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        }),
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        summary: fromPost(function (content) {
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          return content.summary || marksum.summary(content.text)
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        }),
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        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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        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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  }
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}
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