git ssb

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const nest = require('depnest')
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const { h } = require('mutant')
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const Scroller = require('pull-scroll')
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const pull = require('pull-stream')
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exports.gives = nest({
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  'app.html.menuItem': true,
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  'app.page.postRank': true
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})
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exports.needs = nest({
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  'app.html.scroller': 'first',
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  'app.sync.goTo': 'first',
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  'keys.sync.id': 'first',
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  'channel.obs.subscribed': 'first',
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  'contact.obs.following': 'first',
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  'sbot.pull.log': 'first',
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  'message.html.render': 'first'
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})
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exports.create = function (api) {
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  return nest({
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    'app.html.menuItem': menuItem,
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    'app.page.postRank': page
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  })
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  function menuItem () {
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    return h('a', {
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      style: { order: 1 },
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      'ev-click': () => api.app.sync.goTo({ page: 'postRank' })
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    }, '/postRank')
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  }
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  function getPosts (channelPostBoost, friendPostBoost, friendVoteBoost, friendCommentBoost, threshold, cb) {
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    let weights = {
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      post: 1, // base
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      channelPost: channelPostBoost,
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      friendPost: friendPostBoost,
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      vote: 0.5, // base
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      friendVote: friendVoteBoost,
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      comment: 1, // base
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      friendComment: friendCommentBoost
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    }
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    console.log('weights', weights)
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    const myKey = api.keys.sync.id()
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    let myChannels = api.channel.obs.subscribed(myKey)()
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    let imFollowing = new Set(api.contact.obs.following(myKey)())
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    console.log(myChannels)
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    console.log(imFollowing)
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    var messages = {}
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    console.log('pulling', new Date())
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    return pull(
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      api.sbot.pull.log({ reverse: true, limit: 10000 }),
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      pull.drain((msg) => {
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        let content = msg.value.content
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        if (content.type === 'post' && content.root === undefined) {
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          let score = weights['post']
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          if (imFollowing.has(msg.value.author)) { score += weights['friendPost'] }
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          if (myChannels.has(content.channel)) { score += weights['channelPost'] }
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          msg.score = score
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          messages[msg.key] = msg
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        } else if (content.type === 'post' && content.root !== msg.key) {
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          let score = weights['comment']
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          if (imFollowing.has(msg.value.author)) { score += weights['friendComment'] }
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          if (content.root in messages) { messages[content.root].score += score }
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        } else if (content.type === 'vote') {
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          let score = weights['vote']
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          if (imFollowing.has(msg.value.author)) { score += weights['friendVote'] }
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          if (content.vote && content.vote.link in messages) { messages[content.vote.link].score += score }
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        }
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      }, function (err) {
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        if (err) throw err
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        console.log('Went through ' + Object.keys(messages).length, new Date())
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        let msgs = Object.values(messages)
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        msgs.sort((lhs, rhs) => {
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          return rhs.score - lhs.score
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        })
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        cb(msgs.filter(msg => msg.score > threshold))
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      })
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    )
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  }
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  function page (location) {
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    let channelPostBoost = +2
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    let friendPostBoost = +3
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    let friendVoteBoost = +1
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    let friendCommentBoost = +2
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    let threshold = 10
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    let top = [
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      h('span.label', 'Channel boost:'),
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      h('input',
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        {
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          'type': 'number',
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          value: channelPostBoost,
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          'ev-input': ev => { channelPostBoost = parseFloat(ev.target.value) }
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        }),
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      h('span.label', 'Friend post boost:'),
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      h('input',
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        {
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          'type': 'number',
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          value: friendPostBoost,
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          'ev-input': ev => { friendPostBoost = parseFloat(ev.target.value) }
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        }),
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      h('span.label', 'Friend vote boost:'),
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      h('input',
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        {
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          'type': 'number',
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          value: friendVoteBoost,
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          'ev-input': ev => { friendVoteBoost = parseFloat(ev.target.value) }
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        }),
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      h('span.label', 'Friend comment boost:'),
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      h('input',
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        {
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          'type': 'number',
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          value: friendCommentBoost,
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          'ev-input': ev => { friendCommentBoost = parseFloat(ev.target.value) }
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        }),
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      h('span.label', 'Threshold:'),
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      h('input',
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        {
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          'type': 'number',
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          value: threshold,
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          'ev-input': ev => { threshold = parseFloat(ev.target.value) }
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        }),
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      h('button', {
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        'ev-click': draw
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      }, 'Go!')
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    ]
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    const { container, content } = api.app.html.scroller({ prepend: top })
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    function draw () {
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      // reset
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      container.keyboardScroll(0)
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      content.innerHTML = ''
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      getPosts(channelPostBoost, friendPostBoost, friendVoteBoost, friendCommentBoost, threshold,
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        (msgs) => {
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          console.log('msgs', msgs)
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          pull(
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            pull.values(msgs),
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            Scroller(container, content, api.message.html.render)
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          )
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        }
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      )
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    }
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    container.title = '/postRank'
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    return container
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  }
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}
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