git ssb

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var combine = require('depject')
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var entry = require('depject/entry')
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var electron = require('electron')
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var h = require('mutant/h')
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var Value = require('mutant/value')
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var when = require('mutant/when')
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var computed = require('mutant/computed')
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var toCollection = require('mutant/dict-to-collection')
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var MutantDict = require('mutant/dict')
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var MutantMap = require('mutant/map')
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var Url = require('url')
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var insertCss = require('insert-css')
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var nest = require('depnest')
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module.exports = function (config) {
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  var sockets = combine(
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    overrideConfig(config),
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    require('./modules'),
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    require('./plugs'),
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    require('patchcore')
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  )
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  var api = entry(sockets, nest({
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    'page.html.render': 'first'
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  }))
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  var renderPage = api.page.html.render
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  var searchTimer = null
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  var searchBox = h('input.search', {
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    type: 'search',
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    placeholder: 'word, @key, #channel'
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  })
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  searchBox.oninput = function () {
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    clearTimeout(searchTimer)
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    searchTimer = setTimeout(doSearch, 500)
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  }
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  searchBox.onfocus = function () {
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    if (searchBox.value) {
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      doSearch()
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    }
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  }
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  var forwardHistory = []
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  var backHistory = []
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  var views = MutantDict({
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    // preload tabs (and subscribe to update notifications)
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    '/public': renderPage('/public'),
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    // '/private': renderPage('/private'),
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    // [ssbClient.id]: renderPage(ssbClient.id),
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    // '/notifications': renderPage('/notifications')
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  })
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  var lastViewed = {}
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  // delete cached view after 30 mins of last seeing
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  setInterval(() => {
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    views.keys().forEach((view) => {
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      if (lastViewed[view] !== true && Date.now() - lastViewed[view] > (30 * 60e3) && view !== currentView()) {
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        views.delete(view)
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      }
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    })
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  }, 60e3)
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  var canGoForward = Value(false)
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  var canGoBack = Value(false)
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  var currentView = Value('/public')
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  var mainElement = h('div.main', MutantMap(toCollection(views), (item) => {
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    return h('div.view', {
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      hidden: computed([item.key, currentView], (a, b) => a !== b)
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    }, [ item.value ])
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  }))
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  insertCss(require('./styles'))
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  return h('div', {
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    classList: `MainWindow -${process.platform}`,
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    events: {
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      click: catchLinks
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    }
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  }, [
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    h('div.top', [
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      h('span.history', [
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        h('a', {
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          'ev-click': goBack,
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          classList: [ when(canGoBack, '-active') ]
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        }, '<'),
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        h('a', {
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          'ev-click': goForward,
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          classList: [ when(canGoForward, '-active') ]
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        }, '>')
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      ]),
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      h('span.nav', [
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        tab('Public', '/public'),
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        //tab('Private', '/private')
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      ]),
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      h('span.appTitle', ['Patchwork']),
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      h('span', [ searchBox ]),
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      h('span.nav', [
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        // tab('Profile', ssbClient.id),
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        // tab('Mentions', '/notifications')
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      ])
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    ]),
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    mainElement
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  ])
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  // scoped
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  function catchLinks (ev) {
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    if (ev.altKey || ev.ctrlKey || ev.metaKey || ev.shiftKey || ev.defaultPrevented) {
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      return true
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    }
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    var anchor = null
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    for (var n = ev.target; n.parentNode; n = n.parentNode) {
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      if (n.nodeName === 'A') {
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        anchor = n
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        break
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      }
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    }
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    if (!anchor) return true
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    var href = anchor.getAttribute('href')
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    if (href) {
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      var url = Url.parse(href)
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      if (url.host) {
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        electron.shell.openExternal(href)
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      } else if (href !== '#') {
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        setView(href)
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      }
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    }
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    ev.preventDefault()
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    ev.stopPropagation()
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  }
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  function tab (name, view) {
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    var instance = views.get(view)
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    lastViewed[view] = true
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    return h('a', {
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      'ev-click': function (ev) {
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        if (instance.pendingUpdates && instance.pendingUpdates() && instance.reload) {
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          instance.reload()
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        }
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      },
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      href: view,
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      classList: [
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        when(selected(view), '-selected')
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      ]
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    }, [
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      name,
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      when(instance.pendingUpdates, [
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        ' (', instance.pendingUpdates, ')'
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      ])
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    ])
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  }
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  function goBack () {
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    if (backHistory.length) {
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      canGoForward.set(true)
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      forwardHistory.push(currentView())
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      currentView.set(backHistory.pop())
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      canGoBack.set(backHistory.length > 0)
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    }
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  }
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  function goForward () {
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    if (forwardHistory.length) {
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      backHistory.push(currentView())
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      currentView.set(forwardHistory.pop())
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      canGoForward.set(forwardHistory.length > 0)
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      canGoBack.set(true)
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    }
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  }
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  function setView (view) {
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    if (!views.has(view)) {
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      views.put(view, renderPage(view))
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    }
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    if (lastViewed[view] !== true) {
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      lastViewed[view] = Date.now()
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    }
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    if (currentView() && lastViewed[currentView()] !== true) {
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      lastViewed[currentView()] = Date.now()
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    }
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    if (view !== currentView()) {
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      canGoForward.set(false)
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      canGoBack.set(true)
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      forwardHistory.length = 0
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      backHistory.push(currentView())
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      currentView.set(view)
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    }
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  }
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  function doSearch () {
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    var value = searchBox.value.trim()
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    if (value.startsWith('/') || value.startsWith('?') || value.startsWith('@') || value.startsWith('#') || value.startsWith('%')) {
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      setView(value)
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    } else if (value.trim()) {
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      setView(`?${value.trim()}`)
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    } else {
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      setView('/public')
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    }
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  }
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  function selected (view) {
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    return computed([currentView, view], (currentView, view) => {
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      return currentView === view
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    })
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  }
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}
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function overrideConfig (config) {
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  return [{
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    gives: nest('config.sync.load'),
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    create: function (api) {
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      return nest('config.sync.load', () => config)
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    }
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  }]
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}
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