feat: Add vim.notify messages (#36)

lua/neogen.lua

@@ -19,18 +19,33 @@ neogen.generate = function(opts)
     opts = opts or {}
     opts.type = (opts.type == nil or opts.type == "") and "func" or opts.type -- Default type
 
+    if not neogen.configuration.enabled then
+        vim.notify("Neogen not enabled. Please enable it.", vim.log.levels.WARN)
+        return
+    end
+
+    if vim.bo.filetype == "" then
+        vim.notify("No filetype detected", vim.log.levels.WARN)
+        return
+    end
+
     local parser = vim.treesitter.get_parser(0, vim.bo.filetype)
     local tstree = parser:parse()[1]
     local tree = tstree:root()
 
     local language = neogen.configuration.languages[vim.bo.filetype]
 
-    if language then
+    if not language then
+        vim.notify("Language " .. vim.bo.filetype .. " not supported.", vim.log.levels.WARN)
+        return
+    end
+
     language.locator = language.locator or neogen.default_locator
     language.granulator = language.granulator or neogen.default_granulator
     language.generator = language.generator or neogen.default_generator
 
     if not language.parent[opts.type] or not language.data[opts.type] then
+        vim.notify("Type `" .. opts.type .. "` not supported", vim.log.levels.WARN)
         return
     end
 
@@ -116,7 +131,6 @@ neogen.generate = function(opts)
             end
         end
     end
-    end
 end
 
 function neogen.jump_next()