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--[[
LuCI - Lua Configuration Interface
Copyright 2019 lisaac <https://github.com/lisaac/luci-app-dockerman>
]]--

local docker = require "luci.model.docker"

local m, s, o

function byte_format(byte)
	local suff = {"B", "KB", "MB", "GB", "TB"}
	for i=1, 5 do
		if byte > 1024 and i < 5 then
			byte = byte / 1024
		else
			return string.format("%.2f %s", byte, suff[i])
		end
	end
end

m = Map("dockerd", translate("Docker"),
	translate("DockerMan is a Simple Docker manager client for LuCI, If you have any issue please visit:") ..
	" " ..
	[[<a href="https://github.com/lisaac/luci-app-dockerman" target="_blank">]] ..
	translate("Github") ..
	[[</a>]])

local docker_info_table = {}
docker_info_table['3ServerVersion'] = {_key=translate("Docker Version"),_value='-'}
docker_info_table['4ApiVersion'] = {_key=translate("Api Version"),_value='-'}
docker_info_table['5NCPU'] = {_key=translate("CPUs"),_value='-'}
docker_info_table['6MemTotal'] = {_key=translate("Total Memory"),_value='-'}
docker_info_table['7DockerRootDir'] = {_key=translate("Docker Root Dir"),_value='-'}
docker_info_table['8IndexServerAddress'] = {_key=translate("Index Server Address"),_value='-'}
docker_info_table['9RegistryMirrors'] = {_key=translate("Registry Mirrors"),_value='-'}

s = m:section(Table, docker_info_table)
s:option(DummyValue, "_key", translate("Info"))
s:option(DummyValue, "_value")

s = m:section(SimpleSection)
s.template = "dockerman/overview"

s.containers_running = '-'
s.images_used = '-'
s.containers_total = '-'
s.images_total = '-'
s.networks_total = '-'
s.volumes_total = '-'

if docker.new():_ping().code == 200 then
	local dk = docker.new()
	local containers_list = dk.containers:list({query = {all=true}}).body
	local images_list = dk.images:list().body
	local vol = dk.volumes:list()
	local volumes_list = vol and vol.body and vol.body.Volumes or {}
	local networks_list = dk.networks:list().body or {}
	local docker_info = dk:info()

	docker_info_table['3ServerVersion']._value = docker_info.body.ServerVersion
	docker_info_table['4ApiVersion']._value = docker_info.headers["Api-Version"]
	docker_info_table['5NCPU']._value = tostring(docker_info.body.NCPU)
	docker_info_table['6MemTotal']._value = byte_format(docker_info.body.MemTotal)
	if docker_info.body.DockerRootDir then
		local statvfs = nixio.fs.statvfs(docker_info.body.DockerRootDir)
		local size = statvfs and (statvfs.bavail * statvfs.bsize) or 0
		docker_info_table['7DockerRootDir']._value = docker_info.body.DockerRootDir .. " (" .. tostring(byte_format(size)) .. " " .. translate("Available") .. ")"
	end

	docker_info_table['8IndexServerAddress']._value = docker_info.body.IndexServerAddress
	for i, v in ipairs(docker_info.body.RegistryConfig.Mirrors) do
		docker_info_table['9RegistryMirrors']._value = docker_info_table['9RegistryMirrors']._value == "-" and v or (docker_info_table['9RegistryMirrors']._value .. ", " .. v)
	end

	s.images_used = 0
	for i, v in ipairs(images_list) do
		for ci,cv in ipairs(containers_list) do
			if v.Id == cv.ImageID then
				s.images_used = s.images_used + 1
				break
			end
		end
	end

	s.containers_running = tostring(docker_info.body.ContainersRunning)
	s.images_used = tostring(s.images_used)
	s.containers_total = tostring(docker_info.body.Containers)
	s.images_total = tostring(#images_list)
	s.networks_total = tostring(#networks_list)
	s.volumes_total = tostring(#volumes_list)
end

return m