add print monster driver

print-monster/config.yaml

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+name: print_monster
+packageKey: print_monster
+permissions:
+  lan: {}
+  discovery: {}

print-monster/profiles/print_monster-profile.yaml

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+name: print_monster.v1
+components:
+  - id: main
+    capabilities:
+    - id: switch
+      version: 1
+preferences:
+  - preferenceType: integer
+    title: Number of prints per switch
+    required: true
+    description: The number of print requests to make each time the switch is toggled
+    name: printCount
+    definition:
+      minimum: 10
+      maximum: 300
+      default: 100

print-monster/readme.md

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+# Print Monster
+
+I'm not a driver I just print a lot

print-monster/src/init.lua

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+local Driver = require 'st.driver'
+local json = require 'st.json'
+local log = require 'log'
+local capabilities = require 'st.capabilities'
+local cosock = require "cosock"
+
+local function disco(driver, opts, cont)
+  while (cont()) do
+    local device_list = driver.device_api.get_device_list()
+    if #device_list < 40 then
+      print('discovering a device')
+      local device_info = {
+          type = 'LAN',
+          deviceNetworkId = string.format('%s', os.time()),
+          label = 'Monster ' .. tostring(#device_list),
+          profileReference = 'print_monster.v1',
+          vendorProvidedName = 'Monster ' .. tostring(#device_list),
+      }
+      local device_info_json = json.encode(device_info)
+      assert(driver.device_api.create_device(device_info_json))
+      cosock.socket.sleep(1)
+    else
+      break
+    end
+  end
+end
+
+local function toggle_state(device)
+  local is_on = (((device.state_cache or {}).main or {}).switch or {}).on and true or false
+  if is_on then
+    device:emit_event(capabilities.switch.switch.off())
+  else
+    device:emit_event(capabilities.switch.switch.on())
+end
+
+end
+
+
+local function task_that_runs_for(seconds, device, cap)
+    local is_on = (((device.state_cache or {}).main or {}).switch or {}).on and true or false
+    return function()
+        local start = cosock.socket.gettime()
+        while cosock.socket.gettime() - start < seconds do
+            toggle_state(device)
+            log.info("printing", start, is_on)
+            is_on = not is_on
+        end
+    end
+end
+
+local function emit_state(driver, device)
+  log.debug('Emitting state')
+  local iter = (device.preferences or {}).printCount or 100
+  toggle_state(device)
+  cosock.spawn(task_that_runs_for(iter, device))
+end
+
+local function init_device(driver, device)
+  log.trace("init", device.id)
+  toggle_state(device)
+  local iter = (device.preferences or {}).printCount or 100
+  for i=1,iter do
+    log.info("printing", i)
+  end
+end
+
+
+local driver = Driver('Print Monster', {
+  discovery = disco,
+  lifecycle_handlers = {
+    init = init_device,
+    added = function(_, device)
+      log.trace("added", device.id)
+      toggle_state(device)
+    end,
+    deleted = function() log.debug("device deleted") end,
+  },
+  driver_lifecycle = function()
+    os.exit()
+  end,
+  capability_handlers = {
+    [capabilities.switch.ID] = {
+        [capabilities.switch.commands.on.NAME] = function(...)
+            log.info('Turn on')
+            emit_state(...)
+        end,
+        [capabilities.switch.commands.off.NAME] = function(...)
+          log.info('Turn Off')
+          emit_state(...)
+        end
+    }
+}
+})
+
+driver:run()