mgebbe@0: # edge.coffee
mgebbe@0: #
mgebbe@0: # A network edge between users in OStatus or pump.io graph
mgebbe@0: #
mgebbe@0: # Copyright 2013, E14N (https://e14n.com/)
mgebbe@0: #
mgebbe@0: # Licensed under the Apache License, Version 2.0 (the "License");
mgebbe@0: # you may not use this file except in compliance with the License.
mgebbe@0: # You may obtain a copy of the License at
mgebbe@0: #
mgebbe@0: #     http://www.apache.org/licenses/LICENSE-2.0
mgebbe@0: #
mgebbe@0: # Unless required by applicable law or agreed to in writing, software
mgebbe@0: # distributed under the License is distributed on an "AS IS" BASIS,
mgebbe@0: # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mgebbe@0: # See the License for the specific language governing permissions and
mgebbe@0: # limitations under the License.
mgebbe@0: 
mgebbe@0: _ = require("underscore")
mgebbe@0: async = require("async")
mgebbe@0: DatabankObject = require("databank").DatabankObject
mgebbe@0: Edge = DatabankObject.subClass("edge")
mgebbe@0: 
mgebbe@0: Edge.schema =
mgebbe@0:   pkey: "from_to"
mgebbe@0:   fields: [
mgebbe@0:     "from"
mgebbe@0:     "to"
mgebbe@0:     "created"
mgebbe@0:     "received"
mgebbe@0:   ]
mgebbe@0:   indices: [
mgebbe@0:     "from"
mgebbe@0:     "to"
mgebbe@0:   ]
mgebbe@0: 
mgebbe@0: Edge.beforeCreate = (props, callback) ->
mgebbe@0:   if not props.from or not props.to
mgebbe@0:     callback new Error("Need 'from' and 'to' in an edge'"), null
mgebbe@0:     return
mgebbe@0:   props.from_to = Edge.key(props.from, props.to)
mgebbe@0:   props.received = Date.now()
mgebbe@0:   callback null, props
mgebbe@0:   return
mgebbe@0: 
mgebbe@0: Edge::beforeSave = (callback) ->
mgebbe@0:   edge = this
mgebbe@0:   if not edge.from or not edge.to
mgebbe@0:     callback new Error("Need 'from' and 'to' in an edge'"), null
mgebbe@0:     return
mgebbe@0:   edge.from_to = Edge.key(edge.from, edge.to)
mgebbe@0:   edge.received = Date.now()  unless edge.received
mgebbe@0:   callback null
mgebbe@0:   return
mgebbe@0: 
mgebbe@0: Edge.key = (fromId, toId) ->
mgebbe@0:   fromId + "→" + toId
mgebbe@0: 
mgebbe@0: module.exports = Edge