package jobs
//
// GangGo Application Server
// Copyright (C) 2017 Lukas Matt <lukas@zauberstuhl.de>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
//

import (
  "encoding/xml"
  "github.com/revel/revel"
  federation "gopkg.in/ganggo/federation.v0"
)

// XXX remove and replace with database sort
const LIKE_SIG_ORDER = "positive guid parent_guid target_type author"

func (d *Dispatcher) Like(like *federation.EntityLike) {
  authorSig, err := federation.AuthorSignature(
    *like, LIKE_SIG_ORDER, (*d).User.SerializedPrivateKey)
  if err != nil {
    revel.ERROR.Println(err)
    return
  }
  (*like).AuthorSignature = authorSig

  // if parent user is local generate a signature
  if d.ParentUser != nil {
    parentAuthorSig, err := federation.AuthorSignature(
      *like, LIKE_SIG_ORDER, d.ParentUser.SerializedPrivateKey)
    if err != nil {
      revel.ERROR.Println(err)
      return
    }
    (*like).ParentAuthorSignature = parentAuthorSig
  }

  entity := federation.Entity{
    Post: federation.EntityPost{
      Like: like,
    },
  }

  entityXml, err := xml.Marshal(entity)
  if err != nil {
    revel.ERROR.Println(err)
    return
  }

  payload, err := federation.MagicEnvelope(
    (*d).User.SerializedPrivateKey,
    like.Author, entityXml,
  )

  // send it to the network
  sendPublic(payload)
}