luci-app-radicale: New app to support Radicale CalDAV/CardDAV server

New Application
!!! Dependency not set because there are two packages "radicale-py2" and
"radicale-py3" (currently BROKEN) available !!!

Signed-off-by: Christian Schoenebeck <christian.schoenebeck@gmail.com>

1 files changed, 210 insertions, 0 deletions

diff --git a/applications/luci-app-radicale/luasrc/controller/radicale.lua b/applications/luci-app-radicale/luasrc/controller/radicale.lua
new file mode 100755
index 0000000000..662c60d5a6
--- /dev/null
+++ b/applications/luci-app-radicale/luasrc/controller/radicale.lua
@@ -0,0 +1,210 @@
+-- Copyright 2014 Christian Schoenebeck <christian dot schoenebeck at gmail dot com>
+-- Licensed under the Apache License, Version 2.0
+
+module("luci.controller.radicale", package.seeall)
+
+local NX    = require("nixio")
+local NXFS  = require("nixio.fs")
+local DISP  = require "luci.dispatcher"
+local HTTP  = require("luci.http")
+local I18N = require("luci.i18n")	-- not globally avalible here
+local UTIL  = require("luci.util")
+local SYS   = require("luci.sys")
+
+function index()
+	entry( {"admin", "services", "radicale"}, alias("admin", "services", "radicale", "edit"), _("CalDAV/CardDAV"), 58)
+	entry( {"admin", "services", "radicale", "edit"}, cbi("radicale") ).leaf = true
+	entry( {"admin", "services", "radicale", "logview"}, call("_logread") ).leaf = true
+	entry( {"admin", "services", "radicale", "startstop"}, call("_startstop") ).leaf = true
+	entry( {"admin", "services", "radicale", "status"}, call("_status") ).leaf = true
+end
+
+-- called by XHR.get from detail_logview.htm
+function _logread()
+	-- read application settings
+	local uci     = UCI.cursor()
+	local logfile = uci:get("radicale", "radicale", "logfile") or "/var/log/radicale"
+	uci:unload("radicale")
+
+	local ldata=NXFS.readfile(logfile)
+	if not ldata or #ldata == 0 then
+		ldata="_nodata_"
+	end
+	HTTP.write(ldata)
+end
+
+-- called by XHR.get from detail_startstop.htm
+function _startstop()
+	local pid = get_pid()
+	if pid > 0 then
+		SYS.call("/etc/init.d/radicale stop")
+		NX.nanosleep(1)		-- sleep a second
+		if NX.kill(pid, 0) then	-- still running
+			NX.kill(pid, 9)	-- send SIGKILL
+		end
+		pid = 0
+	else
+		SYS.call("/etc/init.d/radicale start")
+		NX.nanosleep(1)		-- sleep a second
+		pid = get_pid()
+		if pid > 0 and not NX.kill(pid, 0) then
+			pid = 0		-- process did not start
+		end
+	end
+	HTTP.write(tostring(pid))	-- HTTP needs string not number
+end
+
+-- called by XHR.poll from detail_startstop.htm
+function _status()
+	local pid = get_pid()
+	HTTP.write(tostring(pid))	-- HTTP needs string not number
+end
+
+-- Application / Service specific information functions ########################
+function luci_app_name()
+	return	"luci-app-radicale"
+end
+
+function service_name()
+	return	"radicale"
+end
+function service_required()
+	return	"0.10-1"
+end
+function service_installed()
+	local v = ipkg_ver_installed("radicale-py2")
+	if not v or #v == 0 then v = ipkg_ver_installed("radicale-py3") end
+	if not v or #v == 0 then v = "0" end
+	return v
+end
+function service_ok()
+	return	ipkg_ver_compare(service_installed(),">=",service_required())
+end
+
+function app_title_main()
+	return	[[</a><a href="javascript:alert(']]
+			.. I18N.translate("Version Information")
+			.. [[\n\n]] .. luci_app_name()
+			.. [[\n\t]] .. I18N.translate("Version") .. [[:\t]]
+				.. (ipkg_ver_installed(luci_app_name()) == ""
+					and I18N.translate("NOT installed")
+					or ipkg_ver_installed(luci_app_name()) )
+			.. [[\n\n]] .. service_name() .. [[ ]] .. I18N.translate("required") .. [[:]]
+			.. [[\n\t]] .. I18N.translate("Version") .. [[:\t]]
+				.. service_required() .. [[ ]] .. I18N.translate("or higher")
+			.. [[\n\n]] .. service_name() .. [[ ]] .. I18N.translate("installed") .. [[:]]
+			.. [[\n\t]] .. I18N.translate("Version") .. [[:\t]]
+				.. (service_installed() == "0"
+					and I18N.translate("NOT installed")
+					or service_installed())
+			.. [[\n\n]]
+	 	.. [[')">]]
+		.. I18N.translate("Radicale CalDAV/CardDAV Server")
+end
+function app_title_back()
+	return	[[</a><a href="]]
+			.. DISP.build_url("admin", "services", "radicale")
+		.. [[">]]
+		.. I18N.translate("Radicale CalDAV/CardDAV Server")
+end
+function app_description()
+	return	I18N.translate("The Radicale Project is a complete CalDAV (calendar) and CardDAV (contact) server solution.") .. [[<br />]]
+	     .. I18N.translate("Calendars and address books are available for both local and remote access, possibly limited through authentication policies.") .. [[<br />]]
+	     .. I18N.translate("They can be viewed and edited by calendar and contact clients on mobile phones or computers.")
+end
+
+-- other multiused functions ###################################################
+
+--return pid of running process
+function get_pid()
+	return tonumber(SYS.exec([[ps | grep "[p]ython.*[r]adicale" 2>/dev/null | awk '{print $1}']])) or 0
+end
+
+-- compare versions using "<=" "<" ">" ">=" "=" "<<" ">>"
+function ipkg_ver_compare(ver1, comp, ver2)
+	if not ver1 or not (#ver1 > 0)
+	or not ver2 or not (#ver2 > 0)
+	or not comp or not (#comp > 0) then return nil end
+	-- correct compare string
+	if comp == "<>" or comp == "><" or comp == "!=" or comp == "~=" then comp = "~="
+	elseif comp == "<=" or comp == "<" or comp == "=<" then comp = "<="
+	elseif comp == ">=" or comp == ">" or comp == "=>" then comp = ">="
+	elseif comp == "="  or comp == "==" then comp = "=="
+	elseif comp == "<<" then comp = "<"
+	elseif comp == ">>" then comp = ">"
+	else return nil end
+
+	local av1 = UTIL.split(ver1, "[%.%-]", nil, true)
+	local av2 = UTIL.split(ver2, "[%.%-]", nil, true)
+
+	for i = 1, math.max(table.getn(av1),table.getn(av2)), 1  do
+		local s1 = av1[i] or ""
+		local s2 = av2[i] or ""
+		local n1 = tonumber(s1)
+		local n2 = tonumber(s2)
+
+		-- one numeric and other empty string then set other to 0
+		if n1 and not n2 and (not s2 or #s2 == 0) then n2 = 0 end
+		if n2 and not n1 and (not s1 or #s1 == 0) then n1 = 0 end
+
+		local nc = (n1 and n2)	-- numeric compare
+
+		if nc then
+			-- first "not equal" found return true
+			if comp == "~=" and (n1 ~= n2) then return true end
+			-- first "lower" found return true
+			if (comp == "<" or comp == "<=") and (n1 < n2) then return true end
+			-- first "greater" found return true
+			if (comp == ">" or comp == ">=") and (n1 > n2) then return true end
+			-- not equal then return false
+			if (n1 ~= n2) then return false end
+		else
+			if comp == "~=" and (s1 ~= s2) then return true end
+			if (comp == "<" or comp == "<=") and (s1 < s2) then return true end
+			if (comp == ">" or comp == ">=") and (s1 > s2) then return true end
+			if (s1 ~= s2) then return false end
+		end
+	end
+	-- all equal then true
+	return true
+end
+
+-- read version information for given package if installed
+function ipkg_ver_installed(pkg)
+	local version = ""
+	local control = io.open("/usr/lib/opkg/info/%s.control" % pkg, "r")
+	if control then
+		local ln
+		repeat
+			ln = control:read("*l")
+			if ln and ln:match("^Version: ") then
+				version = ln:gsub("^Version: ", "")
+				break
+			end
+		until not ln
+		control:close()
+	end
+	return version
+end
+
+-- replacement of build-in Flag.parse of cbi.lua
+-- modified to mark section as changed if value changes
+-- current parse did not do this, but it is done AbstaractValue.parse()
+function flag_parse(self, section)
+	local fexists = self.map:formvalue(
+		luci.cbi.FEXIST_PREFIX .. self.config .. "." .. section .. "." .. self.option)
+
+	if fexists then
+		local fvalue = self:formvalue(section) and self.enabled or self.disabled
+		local cvalue = self:cfgvalue(section)
+		if fvalue ~= self.default or (not self.optional and not self.rmempty) then
+			self:write(section, fvalue)
+		else
+			self:remove(section)
+		end
+		if (fvalue ~= cvalue) then self.section.changed = true end
+	else
+		self:remove(section)
+		self.section.changed = true
+	end
+end