-- Copyright (c) 2016 IBM. All rights reserved.
--
--   Permission is hereby granted, free of charge, to any person obtaining a
--   copy of this software and associated documentation files (the "Software"),
--   to deal in the Software without restriction, including without limitation
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--   and/or sell copies of the Software, and to permit persons to whom the
--   Software is furnished to do so, subject to the following conditions:
--
--   The above copyright notice and this permission notice shall be included in
--   all copies or substantial portions of the Software.
--
--   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
--   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
--   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
--   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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--   DEALINGS IN THE SOFTWARE.

--- @module resources
-- Management interface for resources for the gateway

local redis = require "lib/redis"
local utils = require "lib/utils"

local REDIS_FIELD = "resources"
local _M = {}

--- Helper function for adding a resource to redis and creating an nginx conf file
-- @param red
-- @param resource
-- @param gatewayPath
-- @param tenantId
function _M.addResource(red, resource, gatewayPath, tenantId)
  -- Create resource object and add to redis
  local redisKey = utils.concatStrings({"resources", ":", tenantId, ":", gatewayPath})
  local apiId
  local operations
  for k, v in pairs(resource) do
    if k == 'apiId' then
      apiId = v
    elseif k == 'operations' then
      operations = v
    end
  end
  local resourceObj = redis.generateResourceObj(operations, apiId)
  redis.createResource(red, redisKey, REDIS_FIELD, resourceObj)
end

--- Helper function for deleting resource in redis and appropriate conf files
-- @param red redis instance
-- @param gatewayPath path in gateway
-- @param tenantId tenant id
function _M.deleteResource(red, gatewayPath, tenantId)
  local redisKey = utils.concatStrings({"resources:", tenantId, ":", gatewayPath})
  redis.deleteResource(red, redisKey, REDIS_FIELD)
end

return _M