git ssb

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'use strict'
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const fs = require('fs')
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const h = require('../h')
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const u = require('../util')
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const suggest = require('suggest-box')
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const mentions = require('ssb-mentions')
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const cont = require('cont')
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exports.needs = {
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  suggest_mentions: 'map', //<-- THIS MUST BE REWRITTEN
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  publish: 'first',
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  message_content: 'first',
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  message_confirm: 'first',
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  file_input: 'first'
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}
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exports.gives = {
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  'message_compose': true,
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  'mcss': true
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}
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exports.create = function (api) {
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  return {
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    message_compose,
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    mcss: () => fs.readFileSync(__filename.replace(/js$/, 'mcss'), 'utf8')
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  }
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  /*
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    opts can take
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      placeholder: string. placeholder text, defaults to "Write a message"
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      prepublish: function. called before publishing a message.
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      shrink: boolean. set to false, to make composer not shrink (or hide controls) when unfocused.
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  */
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  function message_compose (meta = {}, opts = {}, cb) {
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    if(!meta.type) throw new Error('message must have type')
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    if('function' === typeof cb) {
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      if('function' === typeof opts) {
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        opts = {prepublish: opts}
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      }
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    }
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    opts.prepublish = opts.prepublish || id
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    var actions
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    var textArea = h('textarea', {
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      placeholder: opts.placeholder || 'Write a message'
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    })
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    if(opts.shrink !== false) {
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      var blur
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      textArea.addEventListener('focus', () => {
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        clearTimeout(blur)
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        if(!textArea.value) {
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          composer.className = 'Compose -expanded'
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        }
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      })
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      textArea.addEventListener('blur', () => {
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        //don't shrink right away, so there is time
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        //to click the publish button.
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        clearTimeout(blur)
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        blur = setTimeout(() => {
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          if(textArea.value) return
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          composer.className = 'Compose -contracted'
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        }, 300)
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      })
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    }
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    textArea.addEventListener('keydown', ev => {
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      if(ev.keyCode === 13 && ev.ctrlKey) publish()
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    })
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    var files = []
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    var filesById = {}
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    function publish() {
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      publishBtn.disabled = true
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      var content
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      try {
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        content = JSON.parse(textArea.value)
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      } catch (err) {
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        meta.text = textArea.value
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        meta.mentions = mentions(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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        try {
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          meta = opts.prepublish(meta)
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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 alert(err.message)
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        }
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        return api.message_confirm(meta, done)
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      }
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      api.message_confirm(content, done)
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      function done (err, msg) {
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        publishBtn.disabled = false
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        if(err) return alert(err.stack)
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        else if (msg) textArea.value = ''
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        if (cb) cb(err, msg)
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      }
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    }
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    var fileInput = api.file_input(file => {
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      files.push(file)
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      filesById[file.link] = file
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      var embed = file.type.indexOf('image/') === 0 ? '!' : ''
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      textArea.value += embed + '['+file.name+']('+file.link+')'
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      composer.className = 'Compose -expanded'
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      console.log('added:', file)
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    })
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    var publishBtn = h('button', {'ev-click': publish}, 'Publish' )
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    var actions = h('section.actions', [
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      fileInput, publishBtn
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    ])
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    var composer = h('Compose', { 
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      className: opts.shrink === false ? '-expanded' : '-contracted'
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    }, [
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      textArea,
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      actions
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    ])
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    suggest(textArea, (name, cb) => {
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      cont.para(api.suggest_mentions(name))
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        ((err, ary) => {
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          cb(null, ary.reduce((a, b) => {
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            if(!b) return a
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            return a.concat(b)
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          }, []))
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        })
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    }, {})
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    return composer
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  }
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}
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function id (e) { return e }
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