git ssb

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'use strict'
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var h = require('hyperscript')
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var u = require('../util')
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var pull = require('pull-stream')
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var Scroller = require('pull-scroll')
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var ref = require('ssb-ref')
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function map(ary, iter) {
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  if(Array.isArray(ary)) return ary.map(iter)
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}
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exports.needs = {
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  build_scroller: 'first',
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  message_render: 'first',
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  message_compose: 'first',
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  message_unbox: 'first',
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  sbot_log: 'first',
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  sbot_whoami: 'first',
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  avatar_image_link: 'first',
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  emoji_url: 'first'
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}
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exports.gives = {
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  builtin_tabs: true,
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  screen_view: true,
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  message_meta: true,
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  message_content_mini: true
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}
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exports.create = function (api) {
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  function unbox () {
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    return pull(
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      pull.filter(function (msg) {
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        return 'string' == typeof msg.value.content
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      }),
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      pull.map(function (msg) {
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        return api.message_unbox(msg)
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      }),
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      pull.filter(Boolean)
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    )
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  }
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  return {
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    builtin_tabs: function () {
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      return ['/private']
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    },
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    screen_view: function (path) {
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      if(path !== '/private') return
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      var composer = api.message_compose(
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        {type: 'post', recps: [], private: true},
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        {
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          prepublish: function (msg) {
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            msg.recps = [id].concat(msg.mentions).filter(function (e) {
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              return ref.isFeed('string' === typeof e ? e : e.link)
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            })
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            if(!msg.recps.length)
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              throw new Error('cannot make private message without recipients - just mention the user in an at reply in the message you send')
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            return msg
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          },
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          placeholder: 'Write a private message'
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        }
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      )
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      var { container, content } = api.build_scroller({ prepend: composer })
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      // if local id is different from sbot id, sbot won't have indexes of
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      // private threads
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      //TODO: put all private indexes client side.
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      var id = require('../keys').id
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      api.sbot_whoami(function (err, feed) {
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        if (err) return console.error(err)
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        if(id !== feed.id)
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          return container.appendChild(h('h4',
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            'Private messages are not supported in the lite client.'))
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        pull(
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          u.next(api.sbot_log, {old: false, limit: 100}),
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          unbox(),
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          Scroller(container, content, api.message_render, true, false)
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        )
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        pull(
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          u.next(api.sbot_log, {reverse: true, limit: 1000}),
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          unbox(),
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          Scroller(container, content, api.message_render, false, false, function (err) {
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            if(err) throw err
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          })
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        )
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      })
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      return container
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    },
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    message_meta: function (msg) {
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      if(msg.value.content.recps || msg.value.private)
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        return h('span.row', 'PRIVATE', map(msg.value.content.recps, function (id) {
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          return api.avatar_image_link('string' == typeof id ? id : id.link, 'thumbnail')
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        }))
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    },
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    message_content_mini: function (msg, sbot)  {
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      if (typeof msg.value.content === 'string') {
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        var icon = api.emoji_url('lock')
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        return icon
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          ? h('img', {className: 'emoji', src: icon})
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          : 'PRIVATE'
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      }
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    }
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  }
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}
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