gql.litcoffee

Query = require('./query')

class GQL

  constructor: () ->

  @parse: (script, callback) ->
    queries = []
    lines = script.split("\n")
    lines.forEach((line) ->
      queries.push(GQL.parse_line(line, callback))
    )
    return queries

  @parse_line: (line, callback) ->
    query = null

    node = null
    GQL.parse_node(line, (parsed, rest) ->
      node = parsed
      line = rest
    )

    action = null
    GQL.parse_action(line, (parsed, rest) ->
      action = parsed
      line = rest
    )

    data = line.trim()

    query = new Query(node, action, data)
    callback(query) if callback
    return query

  @parse_node: (line, callback) ->
    line.replace(/^\s+/, '')
    splitted = line.split(' ')
    path = splitted.shift()
    rest = splitted.join(' ')
    callback(path, rest)
    return path

  @parse_action: (line, callback) ->
    line.replace(/^\s+/, '')
    splitted = line.split(' ')
    action = splitted.shift().toLowerCase()
    if action in ['create', 'read', 'update', 'delete']
      rest = splitted.join(' ')
    else
      action = 'read'
      rest = line
    callback(action, rest)
    return action

module.exports = GQL