Projects and Diseases placeholder application commands (#17)

* fix module name in backup

* save projects to persistent_term

* retrieve projects on bot startup

* remove commented out code

* register project autocomplete

* placeholder text for project

* placeholder disease command

lib/plantid_discord_bot/cogs/diseases.ex

@@ -0,0 +1,16 @@
+defmodule PlantIdDiscordBot.Cog.Diseases do
+  @moduledoc """
+  Functions for using the /diseases application command.
+  """
+
+  alias PlantIdDiscordBot.PlantNet.Projects
+  @api Application.compile_env(:plantid_discord_bot, :api)
+
+  @doc """
+  Sends an invite link for this bot.
+  """
+  def diseases(interaction) do
+    message = "Diseases coming soon."
+    @api.create_interaction_response(interaction, %{type: 4, data: %{content: message}})
+  end
+end

lib/plantid_discord_bot/cogs/projects.ex

@@ -0,0 +1,71 @@
+defmodule PlantIdDiscordBot.Cog.Projects do
+  @moduledoc """
+  Functions for using the /projects application command.
+  """
+
+  alias PlantIdDiscordBot.PlantNet.Projects
+  @api Application.compile_env(:plantid_discord_bot, :api)
+
+  # ---------------------------------------------------------
+  # 1. AUTOCOMPLETE HANDLER
+  # ---------------------------------------------------------
+  def autocomplete(interaction) do
+    # Extract what the user is typing (may be nil)
+    [%{value: user_input}] = interaction.data.options
+    user_input = user_input || ""
+
+    # Fetch your project list
+    projects = Projects.retrieve_projects()
+
+    # Filter based on description
+    suggestions =
+      projects
+      |> Enum.filter(fn p ->
+        String.contains?(
+          String.downcase(p["description"]),
+          String.downcase(user_input)
+        )
+      end)
+      |> Enum.take(25)
+      |> Enum.map(fn p ->
+        %{
+          # what the user sees
+          name: p["description"],
+          # what your command receives
+          value: p["id"]
+        }
+      end)
+
+    # Respond with autocomplete choices
+    @api.create_interaction_response(interaction, %{
+      type: 8,
+      data: %{choices: suggestions}
+    })
+  end
+
+  # ---------------------------------------------------------
+  # 2. FINAL COMMAND EXECUTION
+  # ---------------------------------------------------------
+  def projects(interaction) do
+    # Extract selected project ID
+    project_id =
+      interaction.data.options
+      |> Enum.find(&(&1.name == "project"))
+      |> then(&(&1 && &1.value))
+
+    @api.create_interaction_response(interaction, %{
+      type: 4,
+      data: %{
+        content:
+          case project_id do
+            nil ->
+              "Please choose a project using autocomplete."
+
+            id ->
+              # "You selected project: **#{id}**"
+              "Identification by project coming soon."
+          end
+      }
+    })
+  end
+end