git ssb

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var nest = require('depnest')
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var extend = require('xtend')
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var Pickr = require('flatpickr')
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var spacetime = require('spacetime')
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var {Value, h, computed, when} = require('mutant')
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exports.gives = nest('gathering.sheet.edit')
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exports.needs = nest({
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  'sheet.display': 'first',
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  'message.sheet.preview': 'first',
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  'keys.sync.id': 'first',
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  'sbot.async.publish': 'first',
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  'about.obs.latestValue': 'first',
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  'blob.html.input': 'first',
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  'blob.sync.url': 'first',
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  'intl.sync.i18n': 'first'
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})
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exports.create = function (api) {
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  const i18n = api.intl.sync.i18n
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  return nest('gathering.sheet.edit', function (id) {
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    api.sheet.display(close => {
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      var current = id ? {
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        title: api.about.obs.latestValue(id, 'title'),
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        startDateTime: api.about.obs.latestValue(id, 'startDateTime'),
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        image: api.about.obs.latestValue(id, 'image'),
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        description: api.about.obs.latestValue(id, 'description')
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      } : {
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        title: Value(),
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        startDateTime: Value(),
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        image: Value(),
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        description: Value()
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      }
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      var publishing = Value(false)
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      var chosen = {
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        title: Value(current.title()),
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        startDateTime: Value(current.startDateTime()),
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        image: Value(current.image()),
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        description: Value(current.description())
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      }
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      var imageUrl = computed(chosen.image, (id) => id && api.blob.sync.url(id))
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      return {
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        content: h('div', {
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          style: {
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            padding: '20px',
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            'text-align': 'center'
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          }
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        }, [
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          h('h2', {
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            style: {
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              'font-weight': 'normal'
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            }
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          }, [id ? i18n('Edit') : i18n('Create Gathering')]),
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          h('GatheringEditor', [
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            h('input.title', {
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              placeholder: i18n('Choose a title'),
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              hooks: [ValueHook(chosen.title), FocusHook()]
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            }),
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            h('input.date', {
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              placeholder: i18n('Choose date and time'),
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              hooks: [
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                PickrHook(chosen.startDateTime)
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              ]
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            }),
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            h('ImageInput .banner', {
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              style: { 'background-image': computed(imageUrl, x => `url(${x})`) }
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            }, [
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              h('span', ['🖼 ', i18n('Choose Banner Image...')]),
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              api.blob.html.input(file => {
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                chosen.image.set(file)
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              }, {
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                accept: 'image/*'
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              })
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            ]),
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            h('textarea.description', {
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              placeholder: i18n('Describe the gathering (if you want)'),
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              hooks: [ValueHook(chosen.description)]
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            })
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          ])
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        ]),
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        footer: [
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          h('button -save', {
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            'ev-click': save,
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            'disabled': publishing
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          }, when(publishing, i18n('Publishing...'), i18n('Preview & Publish'))),
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          h('button -cancel', {
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            'ev-click': close
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          }, i18n('Cancel'))
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        ]
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      }
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      function ensureExists (cb) {
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        if (!id) {
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          api.sbot.async.publish({
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            type: 'gathering'
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          }, (err, msg) => {
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            if (err) return cb(err)
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            cb(null, msg.key)
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          })
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        } else {
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          cb(null, id)
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        }
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      }
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      function save () {
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        // no confirm
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        var update = {}
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        if (!compareImage(chosen.image(), current.image())) update.image = chosen.image()
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        if (!compareTime(chosen.startDateTime(), current.startDateTime())) update.startDateTime = chosen.startDateTime()
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        if (chosen.title() !== current.title()) update.title = chosen.title() || i18n('Untitled Gathering')
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        if (chosen.description() !== current.description()) update.description = chosen.description()
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        if (Object.keys(update).length) {
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          // gatherings consist of multiple messages (maybe none of them exist yet), so we need to
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          // construct the preview dialog manually, and override the about values
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          api.message.sheet.preview({
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            key: id,
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            previewAbout: update,
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            publicallyEditable: true,
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            value: {
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              author: api.keys.sync.id(),
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              content: {
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                type: 'gathering'
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              }
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            }
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          }, (err, confirmed) => {
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            if (err) throw err
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            if (confirmed) {
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              publish(update)
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            }
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          })
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        } else {
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          showDialog({
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            type: 'info',
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            title: i18n('Update Profile'),
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            buttons: [i18n('OK')],
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            message: i18n('Nothing to publish'),
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            detail: i18n('You have not made any changes.')
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          })
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          close()
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        }
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      }
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      function publish (update) {
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        publishing.set(true)
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        ensureExists((err, id) => {
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          if (err) throw err
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          api.sbot.async.publish(extend({
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            type: 'about',
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            about: id
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          }, update), (err) => {
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            if (err) {
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              publishing.set(false)
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              showDialog({
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                type: 'error',
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                title: i18n('Error'),
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                buttons: ['OK'],
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                message: i18n('An error occurred while attempting to publish gathering.'),
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                detail: err.message
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              })
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            } else {
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              close()
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            }
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          })
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        })
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      }
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    })
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  })
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}
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function compareTime (a, b) {
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  if (!a && !b) {
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    return true
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  } else if (!a || !b) {
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    return false
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  } else {
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    return a.epoch === b.epoch
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  }
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}
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function compareImage (a, b) {
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  a = isObject(a) ? a.link : a
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  b = isObject(b) ? b.link : b
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  return a === b
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}
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function isObject (value) {
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  return value && typeof value === 'object'
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}
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function FocusHook () {
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  return function (element) {
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    setTimeout(() => {
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      element.focus()
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      element.select()
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    }, 5)
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  }
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}
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function ValueHook (obs) {
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  return function (element) {
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    element.value = obs()
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    element.oninput = function () {
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      obs.set(element.value.trim())
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    }
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  }
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}
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function showDialog (opts) {
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  var electron = require('electron')
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  electron.remote.dialog.showMessageBox(electron.remote.getCurrentWindow(), opts)
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}
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function PickrHook (obs) {
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  return function (element) {
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    var picker = new Pickr(element, {
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      enableTime: true,
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      altInput: true,
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      dateFormat: 'U',
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      onChange: function (dates) {
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        obs.set(spacetime(parseInt(element.value, 10) * 1000))
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      }
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    })
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    var value = obs()
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    if (value) {
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      picker.setDate(value.epoch)
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    }
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    return () => picker.destroy()
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  }
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}
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