switch mp3 to tts, add genserver to app supervisor tree that periodically checks for newly connected devices and plays their associated tts message

assets/package-lock.json

@@ -1,164 +0,0 @@
-{
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-  "version": "1.0.0",
-  "lockfileVersion": 3,
-  "requires": true,
-  "packages": {
-    "": {
-      "name": "here_i_am",
-      "version": "1.0.0",
-      "license": "MIT",
-      "devDependencies": {
-        "daisyui": "^4.12.10"
-      }
-    },
-    "node_modules/camelcase-css": {
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-      "dev": true,
-      "engines": {
-        "node": ">= 6"
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-      "dev": true,
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-      "dev": true,
-      "bin": {
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-      },
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-        "postcss-js": "^4"
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-      "dev": true
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-      "dev": true,
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-      "dev": true,
-      "funding": [
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-          "url": "https://opencollective.com/postcss/"
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-        },
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-      "dev": true,
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-        "type": "opencollective",
-        "url": "https://opencollective.com/postcss/"
-      },
-      "peerDependencies": {
-        "postcss": "^8.4.21"
-      }
-    },
-    "node_modules/source-map-js": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/source-map-js/-/source-map-js-1.2.0.tgz",
-      "integrity": "sha512-itJW8lvSA0TXEphiRoawsCksnlf8SyvmFzIhltqAHluXd88pkCd+cXJVHTDwdCr0IzwptSm035IHQktUu1QUMg==",
-      "dev": true,
-      "peer": true,
-      "engines": {
-        "node": ">=0.10.0"
-      }
-    }
-  }
-}

assets/package.json

@@ -1,14 +0,0 @@
-{
-  "name": "here_i_am",
-  "version": "1.0.0",
-  "main": "tailwind.config.js",
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
-  "author": "silentsilas",
-  "license": "MIT",
-  "description": "",
-  "devDependencies": {
-    "daisyui": "^4.12.10"
-  }
-}

assets/tailwind.config.js

@@ -19,7 +19,6 @@ module.exports = {
     },
   },
   plugins: [
-    require('daisyui'),
     require("@tailwindcss/forms"),
     require("@tailwindcss/typography"),
     // Allows prefixing tailwind classes with LiveView classes to add rules

config/test.exs

@@ -11,7 +11,8 @@ config :here_i_am, HereIAm.Repo,
   hostname: "localhost",
   database: "here_i_am_test#{System.get_env("MIX_TEST_PARTITION")}",
   pool: Ecto.Adapters.SQL.Sandbox,
-  pool_size: System.schedulers_online() * 2
+  pool_size: System.schedulers_online() * 2,
+  port: 5560
 
 # We don't run a server during test. If one is required,
 # you can enable the server option below.

lib/here_i_am/application.ex

@@ -16,6 +16,7 @@ defmodule HereIAm.Application do
       {Finch, name: HereIAm.Finch},
       # Start a worker by calling: HereIAm.Worker.start_link(arg)
       # {HereIAm.Worker, arg},
+      HereIAm.DeviceMonitor,
       # Start to serve requests, typically the last entry
       HereIAmWeb.Endpoint
     ]

lib/here_i_am/device_monitor.ex

@@ -0,0 +1,71 @@
+defmodule HereIAm.DeviceMonitor do
+  use GenServer
+
+  alias HereIAm.Devices
+
+  def start_link(_opts) do
+    GenServer.start_link(__MODULE__, %{}, name: __MODULE__)
+  end
+
+  @impl true
+  def init(state) do
+    schedule_check()
+    {:ok, Map.put(state, :connected_ips, %{})}
+  end
+
+  @impl true
+  def handle_info(:check_devices, state) do
+    connected_ips = get_connected_ips()
+
+    # Determine new devices and TTS
+    new_devices = MapSet.difference(MapSet.new(connected_ips), MapSet.new(Map.keys(state.connected_ips)))
+    Enum.each(new_devices, fn ip ->
+      case Devices.get_device_by_ip(ip) do
+        {:ok, device} -> play_message(device)
+        {:error, _reason} -> :ok
+      end
+    end)
+
+    # Update the registry
+    new_registry = Map.new(connected_ips, fn ip -> {ip, :connected} end)
+    schedule_check()
+    {:noreply, %{state | connected_ips: new_registry}}
+  end
+
+  defp schedule_check() do
+    Process.send_after(self(), :check_devices, 10_000)  # Check every 60 seconds
+  end
+
+  defp get_connected_ips() do
+    {output, 0} = System.cmd("sudo", ["arp-scan", "-l", "--localnet"])
+    parse_ips_from_arp_scan(output)
+  end
+
+  defp parse_ips_from_arp_scan(output) do
+    output
+    |> String.split("\n")
+    |> Enum.filter(&String.contains?(&1, "\t"))  # Filter lines containing tabs (IP-MAC pairs)
+    |> Enum.map(&String.split(&1, "\t"))
+    |> Enum.map(&List.first(&1))
+    |> Enum.filter(&valid_ip?/1)
+  end
+
+  defp valid_ip?(ip) do
+    case :inet.parse_address(to_charlist(ip)) do
+      {:ok, _} -> true
+      {:error, _} -> false
+    end
+  end
+
+  defp play_message(%{tts: tts_message}) do
+    cond do
+      not is_nil(tts_message) and tts_message != "" -> play_tts(tts_message)
+      true -> IO.puts("No audio or TTS message to play.")
+    end
+  end
+
+  defp play_tts(tts_message) do
+    IO.puts("Playing TTS message: #{tts_message}")
+    System.cmd("espeak", [tts_message])
+  end
+end

lib/here_i_am/devices.ex

@@ -101,4 +101,11 @@ defmodule HereIAm.Devices do
   def change_device(%Device{} = device, attrs \\ %{}) do
     Device.changeset(device, attrs)
   end
+
+  def get_device_by_ip(ip_address) do
+    case Repo.get_by(Device, ip_address: ip_address) do
+      nil -> {:error, :not_found}
+      device -> {:ok, device}
+    end
+  end
 end

lib/here_i_am/devices/device.ex

@@ -4,7 +4,7 @@ defmodule HereIAm.Devices.Device do
 
   schema "devices" do
     field :ip_address, :string
-    field :audio, :string
+    field :tts, :string
 
     timestamps(type: :utc_datetime)
   end
@@ -12,7 +12,7 @@ defmodule HereIAm.Devices.Device do
   @doc false
   def changeset(device, attrs) do
     device
-    |> cast(attrs, [:ip_address, :audio])
+    |> cast(attrs, [:ip_address, :tts])
-    |> validate_required([:ip_address, :audio])
+    |> validate_required([:ip_address, :tts])
   end
 end

lib/here_i_am_web/controllers/page_html/home.html.heex

@@ -3,10 +3,10 @@
 <div class="container mx-auto text-center py-10">
   <article class="prose mx-auto px-4">
     <p>
-      This site allows you to set an MP3 to play when your device connects to the network.
+      This site allows you to set a message to play when your device connects to the network.
     </p>
     <a href="/devices">
-      <button class="btn btn-primary mt-5">Manage Devices</button>
+      <.button class="mt-5">Manage Devices</.button>
     </a>
   </article>
 </div>

lib/here_i_am_web/live/device_live/form_component.ex

@@ -20,7 +20,7 @@ defmodule HereIAmWeb.DeviceLive.FormComponent do
         phx-submit="save"
       >
         <.input field={@form[:ip_address]} type="text" label="IP Address" />
-        <.input field={@form[:audio]} type="text" label="Audio" />
+        <.input field={@form[:tts]} type="text" label="tts" />
         <:actions>
           <.button phx-disable-with="Saving...">Save Device</.button>
         </:actions>

lib/here_i_am_web/live/device_live/index.html.heex

@@ -13,7 +13,7 @@
   row_click={fn {_id, device} -> JS.navigate(~p"/devices/#{device}") end}
 >
   <:col :let={{_id, device}} label="IP Address"><%= device.ip_address %></:col>
-  <:col :let={{_id, device}} label="Audio"><%= device.audio %></:col>
+  <:col :let={{_id, device}} label="TTS"><%= device.tts %></:col>
   <:action :let={{_id, device}}>
     <div class="sr-only">
       <.link navigate={~p"/devices/#{device}"}>Show</.link>

lib/here_i_am_web/live/device_live/show.html.heex

@@ -10,7 +10,7 @@
 
 <.list>
   <:item title="IP Address"><%= @device.ip_address %></:item>
-  <:item title="Audio"><%= @device.audio %></:item>
+  <:item title="TTS"><%= @device.tts %></:item>
 </.list>
 
 <.back navigate={~p"/devices"}>Back to devices</.back>

priv/repo/migrations/20240713185614_create_devices.exs

@@ -4,7 +4,7 @@ defmodule HereIAm.Repo.Migrations.CreateDevices do
   def change do
     create table(:devices) do
       add :ip_address, :string
-      add :audio, :string
+      add :tts, :string
 
       timestamps(type: :utc_datetime)
     end

test/here_i_am/devices_test.exs

@@ -8,7 +8,7 @@ defmodule HereIAm.DevicesTest do
 
     import HereIAm.DevicesFixtures
 
-    @invalid_attrs %{ip_address: nil, audio: nil}
+    @invalid_attrs %{ip_address: nil, tts: nil}
 
     test "list_devices/0 returns all devices" do
       device = device_fixture()
@@ -21,11 +21,11 @@ defmodule HereIAm.DevicesTest do
     end
 
     test "create_device/1 with valid data creates a device" do
-      valid_attrs = %{ip_address: "some ip_address", audio: "some audio"}
+      valid_attrs = %{ip_address: "some ip_address", tts: "some tts"}
 
       assert {:ok, %Device{} = device} = Devices.create_device(valid_attrs)
       assert device.ip_address == "some ip_address"
-      assert device.audio == "some audio"
+      assert device.tts == "some tts"
     end
 
     test "create_device/1 with invalid data returns error changeset" do
@@ -34,11 +34,11 @@ defmodule HereIAm.DevicesTest do
 
     test "update_device/2 with valid data updates the device" do
       device = device_fixture()
-      update_attrs = %{ip_address: "some updated ip_address", audio: "some updated audio"}
+      update_attrs = %{ip_address: "some updated ip_address", tts: "some updated tts"}
 
       assert {:ok, %Device{} = device} = Devices.update_device(device, update_attrs)
       assert device.ip_address == "some updated ip_address"
-      assert device.audio == "some updated audio"
+      assert device.tts == "some updated tts"
     end
 
     test "update_device/2 with invalid data returns error changeset" do

test/here_i_am_web/controllers/page_controller_test.exs

@@ -3,6 +3,6 @@ defmodule HereIAmWeb.PageControllerTest do
 
   test "GET /", %{conn: conn} do
     conn = get(conn, ~p"/")
-    assert html_response(conn, 200) =~ "Peace of mind from prototype to production"
+    assert html_response(conn, 200) =~ "This site allows you to set a message to play when your device connects to the network"
   end
 end

test/here_i_am_web/live/device_live_test.exs

@@ -4,9 +4,9 @@ defmodule HereIAmWeb.DeviceLiveTest do
   import Phoenix.LiveViewTest
   import HereIAm.DevicesFixtures
 
-  @create_attrs %{ip_address: "some ip_address", audio: "some audio"}
+  @create_attrs %{ip_address: "some ip_address", tts: "some tts"}
-  @update_attrs %{ip_address: "some updated ip_address", audio: "some updated audio"}
+  @update_attrs %{ip_address: "some updated ip_address", tts: "some updated tts"}
-  @invalid_attrs %{ip_address: nil, audio: nil}
+  @invalid_attrs %{ip_address: nil, tts: nil}
 
   defp create_device(_) do
     device = device_fixture()

test/support/fixtures/devices_fixtures.ex

@@ -11,7 +11,7 @@ defmodule HereIAm.DevicesFixtures do
     {:ok, device} =
       attrs
       |> Enum.into(%{
-        audio: "some audio",
+        tts: "some tts",
         ip_address: "some ip_address"
       })
       |> HereIAm.Devices.create_device()