git ssb

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const { h, when, send, resolve, Value, Array: MutantArray, computed } = require('mutant')
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const nest = require('depnest')
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const ssbMentions = require('ssb-mentions')
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const extend = require('xtend')
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const addSuggest = require('suggest-box')
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const blobFiles = require('ssb-blob-files')
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exports.gives = nest('message.html.compose')
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exports.needs = nest({
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  'about.async.suggest': 'first',
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  'channel.async.suggest': 'first',
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  'emoji.async.suggest': 'first',
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  'meme.async.suggest': 'first',
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  // 'blob.html.input': 'first', // TODO extract fileInput creator below out into patchcore
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  'message.html.confirm': 'first',
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  'drafts.sync.get': 'first',
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  'drafts.sync.set': 'first',
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  'drafts.sync.remove': 'first',
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  'settings.obs.get': 'first',
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  'sbot.obs.connection': 'first'
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})
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exports.create = function (api) {
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  return nest({ 'message.html.compose': compose })
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  function compose (options, cb) {
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    const {
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      meta,
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      location,
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      feedIdsInThread = [],
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      prepublish,
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      placeholder = 'Write a message',
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      shrink = true
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    } = options
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    if (typeof resolve(meta) !== 'object') throw new Error('Compose needs meta data about what sort of message composer you are making')
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    if (!location) throw new Error('Compose expects a unique location so it can save drafts of messages')
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    var files = []
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    var filesById = {}
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    var channelInputFocused = Value(false)
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    var textAreaFocused = Value(false)
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    var focused = computed([channelInputFocused, textAreaFocused], (a, b) => a || b)
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    var hasContent = Value(false)
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    var blurTimeout = null
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    var expanded = computed([shrink, focused, hasContent], (shrink, focused, hasContent) => {
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      if (!shrink || hasContent) return true
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      return focused
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    })
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    var channelInput = h('input.channel', {
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      'ev-input': () => hasContent.set(!!channelInput.value),
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      'ev-keyup': ev => {
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        ev.target.value = ev.target.value.replace(/^#*([\w@%&])/, '#$1')
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      },
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      'ev-blur': () => {
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        clearTimeout(blurTimeout)
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        blurTimeout = setTimeout(() => channelInputFocused.set(false), 200)
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      },
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      'ev-focus': send(channelInputFocused.set, true),
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      placeholder: '#channel (optional)',
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      value: computed(meta.channel, ch => ch ? '#' + ch : null),
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      disabled: meta.channel ? true : undefined,
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      title: meta.channel ? 'Reply is in same channel as original message' : undefined
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    })
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    var draftPerstTimeout = null
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    var draftLocation = location
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    var textArea = h('textarea', {
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      'ev-input': () => {
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        hasContent.set(!!textArea.value)
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        clearTimeout(draftPerstTimeout)
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        draftPerstTimeout = setTimeout(() => {
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          api.drafts.sync.set(draftLocation, textArea.value)
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        }, 200)
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      },
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      'ev-blur': () => {
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        clearTimeout(blurTimeout)
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        blurTimeout = setTimeout(() => textAreaFocused.set(false), 200)
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      },
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      'ev-focus': send(textAreaFocused.set, true),
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      placeholder
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    })
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    textArea.publish = publish // TODO: fix - clunky api for the keyboard shortcut to target
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    // load draft
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    let draft = api.drafts.sync.get(draftLocation)
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    if (typeof draft === 'string') {
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      textArea.value = draft
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      hasContent.set(true)
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    }
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    var isPrivate = location.page === 'private' ||
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      (location.key && !location.value) ||
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      (location.value && location.value.private)
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    var warningMessages = MutantArray([])
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    var warning = computed(warningMessages, msgs => {
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      if (!msgs.length) return
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      return h('section.warnings', msgs.map((m, i) => {
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        return h('div.warning', [
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          h('i.fa.fa-exclamation-triangle'),
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          h('div.message', m),
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          h('i.fa.fa-times', { 'ev-click': () => warningMessages.deleteAt(i) })
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        ])
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      }))
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    })
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    var fileInput = h('input', {
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      type: 'file',
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      // accept,
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      attributes: { multiple: true },
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      'ev-click': () => hasContent.set(true),
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      'ev-change': (ev) => {
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        warningMessages.set([])
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        const files = ev.target.files
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        const opts = {
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          stripExif: api.settings.obs.get('patchbay.removeExif', true),
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          isPrivate
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        }
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        blobFiles(files, api.sbot.obs.connection, opts, afterBlobed)
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      }
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    })
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    function afterBlobed (err, result) {
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      if (err) {
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        console.error(err)
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        warningMessages.push(err.message)
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        return
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      }
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      files.push(result)
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      filesById[result.link] = result
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      const pos = textArea.selectionStart
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      const embed = result.type.match(/^image/) ? '!' : ''
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      const spacer = embed ? '\n' : ' '
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      const insertLink = spacer + embed + '[' + result.name + ']' + '(' + result.link + ')' + spacer
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      textArea.value = textArea.value.slice(0, pos) + insertLink + textArea.value.slice(pos)
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      console.log('added:', result)
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    }
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    var publishBtn = h('button', { 'ev-click': publish }, isPrivate ? 'Reply' : 'Publish')
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    var actions = h('section.actions', [
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      fileInput,
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      publishBtn
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    ])
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    var composer = h('Compose', {
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      classList: when(expanded, '-expanded', '-contracted')
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    }, [
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      channelInput,
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      textArea,
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      warning,
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      actions
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    ])
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    composer.addQuote = function (data) {
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      try {
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        if (typeof data.content.text === 'string') {
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          var text = data.content.text
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          textArea.value += '> ' + text.replace(/\r\n|\r|\n/g, '\n> ') + '\r\n\n'
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          hasContent.set(!!textArea.value)
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        }
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      } catch (err) {
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        // object not have text or content
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      }
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    }
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    if (location.action === 'quote') { composer.addQuote(location.value) }
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    addSuggest(channelInput, (inputText, cb) => {
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      if (inputText[0] === '#') {
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        api.channel.async.suggest(inputText.slice(1), cb)
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      }
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    }, { cls: 'PatchSuggest' })
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    channelInput.addEventListener('suggestselect', ev => {
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      channelInput.value = ev.detail.id // HACK : this over-rides the markdown value
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    })
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    addSuggest(textArea, (inputText, cb) => {
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      const char = inputText[0]
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      const wordFragment = inputText.slice(1)
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      if (char === '@') api.about.async.suggest(wordFragment, feedIdsInThread, cb)
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      if (char === '#') api.channel.async.suggest(wordFragment, cb)
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      if (char === ':') api.emoji.async.suggest(wordFragment, cb)
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      if (char === '&') api.meme.async.suggest(wordFragment, cb)
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    }, { cls: 'PatchSuggest' })
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    return composer
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    // scoped
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    function publish () {
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      publishBtn.disabled = true
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      const channel = channelInput.value.startsWith('#')
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        ? channelInput.value.substr(1).trim()
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        : channelInput.value.trim()
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      const mentions = ssbMentions(textArea.value).map(mention => {
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        // merge markdown-detected mention with file info
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        var file = filesById[mention.link]
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        if (file) {
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          if (file.type) mention.type = file.type
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          if (file.size) mention.size = file.size
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        }
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        return mention
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      })
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      var content = extend(resolve(meta), {
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        text: textArea.value,
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        channel,
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        mentions
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      })
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      if (!channel) delete content.channel
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      if (!mentions.length) delete content.mentions
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      if (content.recps && content.recps.length === 0) delete content.recps
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      try {
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        if (typeof prepublish === 'function') {
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          content = prepublish(content)
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        }
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      } catch (err) {
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        publishBtn.disabled = false
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        if (cb) cb(err)
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        else throw err
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      }
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      return api.message.html.confirm(content, done)
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      function done (err, msg) {
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        publishBtn.disabled = false
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        if (err) throw err
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        else if (msg) {
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          textArea.value = ''
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          api.drafts.sync.remove(draftLocation)
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        }
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        if (cb) cb(err, msg)
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      }
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    }
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  }
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}
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