feat: add exercism list functionality

lua/exercism/commands.lua

@@ -1,21 +1,22 @@
 local exercism_module = require('exercism.module')
-local config = require('exercism.config')
+local config = require('exercism.config').config
 
 local M = {}
 
 M.setup = function()
-    -- Add all user commands here
-    vim.api.nvim_create_user_command('ExercismHello', function(opts)
-        exercism_module.greet(opts.args)
+    vim.api.nvim_create_user_command('ExercismList', function(opts)
+        local language = vim.split(opts.args, ' ')[1]
+        exercism_module.list_exercises(language)
     end, { nargs = '?' })
 
     if config.add_default_keybindings then
         local function add_keymap(keys, cmd, desc)
             vim.api.nvim_set_keymap('n', keys, cmd, { noremap = true, silent = true, desc = desc })
         end
 
-        -- Add all keybindings here
-        add_keymap('<leader>Th', ':ExercismHello Neovim (btw!)<CR>', 'Exercism says hi')
+        if config.add_default_keybindings then
+            add_keymap('<leader>goe', ':ExercismList lua<CR>', 'Exercism says hi')
+        end
     end
 end
 

lua/exercism/config.lua

@@ -4,6 +4,7 @@ local M = {}
 
 ---@class ExercismConfig
 ---@field name string
+---@field exercism_workspace string
 ---@field add_default_keybindings boolean
 local config = {
     name = 'World!',

lua/exercism/module.lua

@@ -1,20 +1,55 @@
----@class CustomModule
+local utils = require('utils')
+local Path = require('plenary.path')
+
 local M = {}
 local config = require('exercism.config').config
 
----@return string
-M.greet = function(name)
-    name = name and #name > 0 and name or config.name
-
-    M.show_notification('Hello ' .. name)
-    return 'Hello ' .. name
+---@param language any
+---@return any
+local function get_exercise_data(language)
+    local script_path = debug.getinfo(1, 'S').source:sub(2)
+    local plugin_path = vim.fn.fnamemodify(script_path, ':h:h:h')
+    local exercise_file = plugin_path .. '/data/' .. language .. '.json'
+    local exercise_data = vim.fn.json_decode(vim.fn.readfile(exercise_file))
+    return exercise_data
 end
 
-M.show_notification = function(message)
-    vim.notify(message, vim.log.levels.INFO, {
-        title = 'Exercism',
-        timeout = 5000,
-    })
+---@param language string
+M.list_exercises = function(language)
+    local exercise_data = get_exercise_data(language)
+
+    if #exercise_data > 0 then
+        vim.ui.select(exercise_data, {
+            prompt = 'Select Exercise',
+            format_item = function(exercise)
+                return exercise.name .. ' : ' .. exercise.type
+            end,
+        }, function(selected_exercise, _)
+            if not selected_exercise then
+                return
+            end
+            local exercise_dir = config.exercism_workspace .. '/' .. language .. '/' .. selected_exercise.name
+
+            if not Path:new(exercise_dir):exists() then
+                local exercism_cmd =
+                    string.format('exercism download --track=%s --exercise=%s', language, selected_exercise.name)
+
+                utils.show_notification(
+                    'Setting up exercise: ' .. selected_exercise.name .. ' in ' .. language,
+                    vim.log.levels.INFO,
+                    'Exercism'
+                )
+
+                utils.async_shell_execute(exercism_cmd, function(result)
+                    if result then
+                        utils.open_dir(exercise_dir)
+                    end
+                end)
+            else
+                utils.open_dir(exercise_dir)
+            end
+        end)
+    end
 end
 
 return M