git ssb

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const { h } = require('mutant')
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const nest = require('depnest')
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const insertCss = require('insert-css')
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const Tabs = require('hypertabs')
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exports.gives = nest('main.html.app')
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exports.needs = nest({
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  'main.html.error': 'first',
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  'router.html.page': 'first',
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  'styles.css': 'reduce'
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})
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exports.create = function (api) {
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  return nest('main.html.app', app)
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  function app () {
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    const css = values(api.styles.css()).join('\n')
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    insertCss(css)
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    var tabs = Tabs() // optional onSelect cb
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    var App = h('App', tabs)
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    function addPage (link, change, split) {
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      const page = api.router.html.page(link)
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      if (!page) return
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      page.id = page.id || link
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      tabs.add(page, change, split)
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    }
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    const initialTabs = ['/public', '/private', '/notifications']
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    initialTabs.forEach(r => addPage(r))
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    tabs.select(0)
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    catchClick(App, (link, { ctrlKey: openBackground, isExternal }) => {
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      if (tabs.has(link)) tabs.select(link)
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      else {
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        const changeTab = !openBackground
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        addPage(link, changeTab)
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      }
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      // TODO add external-links module
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    })
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    // Catch errors
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    var { container: errorPage, content: errorList } = api.router.html.page('/errors')
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    window.addEventListener('error', ev => {
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      if (!tabs.has('/errors')) tabs.add(errorPage, true)
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      const error = api.main.html.error(ev.error || ev)
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      errorList.appendChild(error)
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    })
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    return App
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  }
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}
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function values (object) {
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  const keys = Object.keys(object)
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  return keys.map(k => object[k])
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}
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// TODO - replace with extracted module
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var Url = require('url')
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function catchClick (root, cb) {
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  root.addEventListener('click', (ev) => {
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    if (ev.target.tagName === 'INPUT' && ev.target.type === 'file') return
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    if (ev.defaultPrevented) return // TODO check this is in the right place
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    ev.preventDefault()
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    ev.stopPropagation()
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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) return
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    var url = Url.parse(href)
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    var opts = {
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      altKey: ev.altKey,
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      ctrlKey: ev.ctrlKey,
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      metaKey: ev.metaKey,
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      shiftKey: ev.shiftKey,
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      isExternal: !!url.host
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    }
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    cb(href, opts)
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  })
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}
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