version 2.0.0, simplified usage, custom channl name

ReadMe.md

@@ -9,37 +9,37 @@ Just copy `check.lua` to where you want in your source.
 
 ## Usage
 
-Start it in its own thread, and send a table on the "send-itchy" channel with
-information on what you're looking for. Wait for a response on the
-"receive-itchy" channel.
+Start it as a thread with a configuration table. Wait for "itchy" channel to
+respond with a table of version information.
 
 ```lua
--- initialize
-versionCheck = love.thread.newThread("lib/itchy/check.lua")
-versionCheckSend = thread.getChannel("send-itchy")
-versionCheck:start()
-versionCheckSend:push({
-  target = "guard13007/asteroid-dodge", -- target/url must be defined, see Options
-  version = current_version             -- defined elsewhere (also, optional)
-  -- other options are available!! see list below
+versionChecker = love.thread.newThread("lib/itchy/check.lua") -- wherever you save it..
+versionChecker:start({
+  target = "guard13007/asteroid-dodge", -- target/url must be defined
+  version = "1.0.0"                     -- optional, config options listed below
 })
--- receive info
-versionCheckReceive = thread.getChannel("receive-itchy")
-if versionCheckReceive:getCount() > 0 then
-  data = versionCheckReceive:demand() -- this is a table of info, format specified below
-  -- easiest usage is to just print something like this to the user somewhere
-  print("Version: " .. current_version .. " Latest version: " .. data.message)
+
+newVersion = love.thread.getChannel("itchy")
+if newVersion:getCount() > 0 then
+  local data = newVersion:demand() -- see example data below
+  -- easiest usage is to just print something like this to the user
+  print("Version: 1.0.0 Latest version: " .. data.message)
 end
 ```
 
+Since it is run as a thread, you can cancel it with `versionChecker:kill()` and
+start it again or with a different configuration later with `:start()`.
+
+### Version Information Example
+
 Returned data example:
 
 ```lua
 {
   status = 200,                -- nil or status code of an HTTP request
-  body = '{"latest":"0.2.0"}', -- raw resulting body from the HTTP request
-  version = "0.2.0",           -- a number or string
-  latest = true,               -- nil or boolean your version == latest version?
+  body = '{"latest":"0.2.0"}', -- raw result body from the HTTP request
+  version = "0.2.0",           -- number/string (if body was parsed correctly)
+  latest = true,               -- nil/boolean: your version == latest version?
   message = "0.2.0, you have the latest version"   -- an error or status message
 }
 ```
@@ -54,9 +54,9 @@ based on this value. If it is unable to extract it or compare, `version` and
 If HTTP status 200 (OK) is encountered or a version is successfully parsed from
 a response, the script terminates (or moves on to checking on an `interval`.)
 Otherwise, it will keep trying with an exponential back-off starting at a 1
-second delay.
+second delay, capped at retrying every 10 minutes.
 
-### Options
+### Configuration Options
 
 At minimum a `url` or `target` must be specified.
 
@@ -71,7 +71,9 @@ At minimum a `url` or `target` must be specified.
 * `version` (string/number) Version of the game running right now.
 * `proxy` (string) This library uses an [HTTP proxy](https://github.com/Guard13007/insecure-proxy)
   for the HTTPS call to itch.io's API. By default it uses `https://104.236.139.220:16343`
-  which is a DigitalOcean VPS I own. If you'd rather use a different proxy
+  which is on a DigitalOcean VPS I own. If you'd rather use a different proxy
   server, you can specify it here.
 * `interval` (number) If specified, a check for the latest version will happen
   again every `interval` seconds.
+* `thread_channel` (string) If specified, will use a different named thread
+  channel to return results to.

check.lua

@@ -5,10 +5,9 @@ do
   thread, timer = _obj_0.thread, _obj_0.timer
 end
 local http = require("socket.http")
-local receive = thread.getChannel("send-itchy")
-local send = thread.getChannel("receive-itchy")
 local check
 check = function(data)
+  local send = thread.getChannel(data.thread_channel or "itchy")
   local exponential_backoff = 1
   while true do
     local _continue_0 = false
@@ -40,6 +39,9 @@ check = function(data)
           send:push(result)
           timer.sleep(exponential_backoff)
           exponential_backoff = exponential_backoff * 2
+          if exponential_backoff > 10 * 60 then
+            exponential_backoff = 10 * 60
+          end
           _continue_0 = true
           break
         elseif result.latest ~= nil then
@@ -62,8 +64,7 @@ check = function(data)
   end
 end
 local start
-start = function()
-  local data = receive:demand()
+start = function(data)
   if not (data.proxy or data.url) then
     data.proxy = "http://45.55.113.149:16343"
   end
@@ -89,12 +90,8 @@ start = function()
   if data.interval then
     while true do
       timer.sleep(data.interval)
-      if receive:getCount() > 0 then
-        return start()
-      else
-        check(data)
-      end
+      check(data)
     end
   end
 end
-return start()
+return start(...)

check.moon

@@ -2,10 +2,10 @@ require "love.timer"
 import thread, timer from love
 
 http = require "socket.http"
-receive = thread.getChannel "send-itchy"
-send = thread.getChannel "receive-itchy"
 
 check = (data) ->
+  send = thread.getChannel data.thread_channel or "itchy"
+
   exponential_backoff = 1
   while true
     result = {}
@@ -33,6 +33,7 @@ check = (data) ->
       send\push result
       timer.sleep exponential_backoff
       exponential_backoff *= 2
+      exponential_backoff = 10 * 60 if exponential_backoff > 10 * 60 -- maximum backoff is 10 minutes
       continue
     elseif result.latest != nil
       if result.latest
@@ -45,9 +46,8 @@ check = (data) ->
     send\push result
     return true
 
-start = ->
-  -- data should be a table of information
-  data = receive\demand!
+-- data should be a table of information
+start = (data) ->
   data.proxy = "http://45.55.113.149:16343" unless data.proxy or data.url
 
   -- channel can be autodetected if not specified
@@ -74,11 +74,6 @@ start = ->
   if data.interval
     while true
       timer.sleep data.interval
+      check data
 
-      -- if we are sent new data, start over entirely
-      if receive\getCount! > 0
-        return start!
-      else
-        check data
-
-start!
+start(...)

usage.lua

@@ -0,0 +1,12 @@
+versionChecker = love.thread.newThread("lib/itchy/check.lua") -- wherever you save it..
+versionChecker:start({
+  target = "guard13007/asteroid-dodge", -- target/url must be defined
+  version = "1.0.0"                     -- optional
+})
+
+newVersion = love.thread.getChannel("itchy")
+if newVersion:getCount() > 0 then
+  local data = newVersion:demand()
+  -- easiest usage is to just print something like this to the user
+  print("Version: 1.0.0 Latest version: " .. data.message)
+end