milo shop example

swshop/shopView-example.lua

@@ -0,0 +1,89 @@
+local Config     = require('config')
+local Event      = require('event')
+local itemDB     = require('itemDB')
+local Milo       = require('milo')
+
+local multishell = _ENV.multishell
+local os         = _G.os
+local shell      = _ENV.shell
+
+local config = Config.load('shop')
+local shopTab
+
+-- You will need to register this plugin in usr/config/milo.state
+-- replace the shopView entry with your file name.
+
+--[[ Display ]]--
+local function showListing(node)
+  local mon = node.adapter
+  local list = Milo:listItems()
+
+  mon.clear()
+  local i = 1
+
+  for k,v in pairs(config) do
+    local item = list[k]
+    if item and item.count > 0 then
+      mon.setCursorPos(1, i)
+      mon.write(string.format('%d  %s: %d kst', v.count, v.displayName, v.price))
+      mon.setCursorPos(1, i + 1)
+      mon.write(v.info)
+      i = i + 2
+    end
+  end
+end
+
+-- everything below is important to keep
+local function startShop(node)
+  if shopTab then
+    multishell.terminate(shopTab)
+  end
+  shopTab = shell.openTab('/packages/swshop/swshop.lua', node.domain, node.password)
+end
+
+-- node has been reconfigured
+Event.on('shop_restart', function(_, node)
+  startShop(node)
+end)
+
+-- milo is being terminated
+Event.on('terminate', function()
+  if shopTab then
+    multishell.terminate(shopTab)
+    shopTab = nil
+  end
+end)
+
+-- called when an item to sell has been changed
+Event.on('shop_refresh', function()
+  config = Config.load('shop')
+end)
+
+-- called from the shop when an item has been purchased
+Event.on('shop_provide', function(_, item, quantity, uid)
+  Milo:queueRequest({ }, function()
+    local count = Milo:eject(itemDB:splitKey(item), quantity)
+    os.queueEvent('shop_provided', uid, count)
+  end)
+end)
+
+--[[ Task ]]--
+local StoreTask = {
+  name = 'shop',
+  priority = 30,
+}
+
+function StoreTask:cycle(context)
+  local node = context.storage:filterActive('shop')()
+  if node then
+    -- a monitor has been configured
+    if not shopTab then
+      -- first time running
+      startShop(node)
+    end
+
+    showListing(node)
+  end
+end
+
+Milo:registerTask(StoreTask)