chatPane.js

/*   Chat Pane
**
**  Plan is to support a finte number of chat graph shapes
** and investigate the interop between them.
*/

const UI = require('solid-ui')
const ns = UI.ns
const kb = UI.store

module.exports = {
  icon: UI.icons.iconBase + 'noun_346319.svg',

  name: 'chat',

  /*   AN RRSAgent IRC log:

  <irc://localhost:6667/&mit>
      a    foaf:ChatChannel
      foaf:chatEventList
              [ rdf:_100
                 <#T19-10-58>
              rdf:_101
                 <#T19-10-58-1>
              rdf:_102
  ..
  <#T19-28-47-1>
      dc:creator
         [ a wn:Person; foaf:nick "timbl" ]
      dc:date
         "2016-03-15T19:28:47Z"
      dc:description
         "timbl has joined &mit"
      a    foaf:chatEvent.

  */

  label: function (subject) {
    var n = UI.store.each(subject, ns.wf('message')).length
    if (n > 0) return 'Chat (' + n + ')' // Show how many in hover text

    if (kb.holds(subject, ns.rdf('type'), ns.meeting('Chat'))) { // subject is the file
      return 'Meeting chat'
    }
    if (kb.holds(undefined, ns.rdf('type'), ns.foaf('ChatChannel'), subject)) { // subject is the file
      return 'IRC log' // contains anything of this type
    }
    return null // Suppress pane otherwise
  },

  mintClass: ns.meeting('Chat'),

  mintNew: function (newPaneOptions) {
    var updater = kb.updater
    if (newPaneOptions.me && !newPaneOptions.me.uri) throw new Error('chat mintNew:  Invalid userid ' + newPaneOptions.me)

    var newInstance = newPaneOptions.newInstance = newPaneOptions.newInstance || kb.sym(newPaneOptions.newBase + 'index.ttl#this')
    var newChatDoc = newInstance.doc()

    kb.add(newInstance, ns.rdf('type'), ns.meeting('Chat'), newChatDoc)
    kb.add(newInstance, ns.dc('title'), 'Chat', newChatDoc)
    kb.add(newInstance, ns.dc('created'), new Date(), newChatDoc)
    if (newPaneOptions.me) {
      kb.add(newInstance, ns.dc('author'), newPaneOptions.me, newChatDoc)
    }

    return new Promise(function (resolve, reject) {
      updater.put(
        newChatDoc,
        kb.statementsMatching(undefined, undefined, undefined, newChatDoc),
        'text/turtle',
        function (uri2, ok, message) {
          if (ok) {
            resolve(newPaneOptions)
          } else {
            reject(new Error('FAILED to save new tool at: ' + uri2 + ' : ' +
              message))
          };
        })
    })
  },

  render: function (subject, dom) {
    var complain = function complain (message, color) {
      var pre = dom.createElement('pre')
      pre.setAttribute('style', 'background-color: ' + color || '#eed' + ';')
      div.appendChild(pre)
      pre.appendChild(dom.createTextNode(message))
    }

    var div = dom.createElement('div')
    div.setAttribute('class', 'chatPane')
    let options = {} // Like newestFirst
    var messageStore
    if (kb.holds(subject, ns.rdf('type'), ns.meeting('Chat'))) { // subject may be the file
      messageStore = subject.doc()
    } else if (kb.any(subject, UI.ns.wf('message'))) {
      messageStore = UI.store.any(subject, UI.ns.wf('message')).doc()
    } else if (kb.holds(undefined, ns.rdf('type'), ns.foaf('ChatChannel'), subject) ||
               kb.holds(subject, ns.rdf('type'), ns.foaf('ChatChannel'))) { // subject is the file
      var ircLogQuery = function () {
        var query = new $rdf.Query('IRC log entries')
        var v = []
        var vv = ['chan', 'msg', 'date', 'list', 'pred', 'creator', 'content']
        vv.map(function (x) {
          query.vars.push(v[x] = $rdf.variable(x))
        })
        query.pat.add(v['chan'], ns.foaf('chatEventList'), v['list']) // chatEventList
        query.pat.add(v['list'], v['pred'], v['msg']) //
        query.pat.add(v['msg'], ns.dc('date'), v['date'])
        query.pat.add(v['msg'], ns.dc('creator'), v['creator'])
        query.pat.add(v['msg'], ns.dc('description'), v['content'])
        return query
      }
      messageStore = subject.doc()
      options.query = ircLogQuery()
    } else {
      complain('Unknown chat type')
    }

//    var context = {dom, div}
//    UI.authn.logIn(context).then( context => { // The widget itself sees to login

    div.appendChild(UI.messageArea(dom, kb, subject, messageStore, options))
    kb.updater.addDownstreamChangeListener(messageStore, function () {
      UI.widgets.refreshTree(div)
    }) // Live update
//    })

    return div
  }
}