Guid formatting

lua/guid.lua

@@ -3,18 +3,6 @@ local function get_cursor_pos()
     return {row = row, col = col}
 end
 
-local function guid_generate()
-    local bytes = {}
-    for i = 1, 16 do
-        bytes[i] = math.random(0, 255)
-    end
-    return bytes
-end
-
-local function guid_format(guid)
-    return string.format('%.2x%.2x%.2x%.2x-%.2x%.2x-%.2x%.2x-%.2x%.2x-%.2x%.2x%.2x%.2x%.2x%.2x', unpack(guid))
-end
-
 local function insert_text_at_pos(text, pos)
     local line = vim.fn.getline(pos.row)
     ---@diagnostic disable-next-line: param-type-mismatch
@@ -24,10 +12,51 @@ local function insert_text_at_pos(text, pos)
     vim.fn.setline(pos.row, prefix .. text .. suffix)
 end
 
-local function guid_insert()
+local function guid_generate()
+    local bytes = {}
+    for i = 1, 16 do
+        bytes[i] = math.random(0, 255)
+    end
+    return bytes
+end
+
+local function guid_format(guid, style)
+    style = style or 'd'
+
+    -- Format specifier definition:
+    -- https://learn.microsoft.com/en-us/dotnet/api/system.guid.tostring?view=net-7.0
+
+    local format = nil
+    local style_lower = style:lower()
+    if style_lower == 'n' then
+        -- 00000000000000000000000000000000
+        format = '%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x'
+    elseif style_lower == 'd' then
+        -- 00000000-0000-0000-0000-000000000000
+        format = '%.2x%.2x%.2x%.2x-%.2x%.2x-%.2x%.2x-%.2x%.2x-%.2x%.2x%.2x%.2x%.2x%.2x'
+    elseif style_lower == 'b' then
+        -- {00000000-0000-0000-0000-000000000000}
+        format = '{%.2x%.2x%.2x%.2x-%.2x%.2x-%.2x%.2x-%.2x%.2x-%.2x%.2x%.2x%.2x%.2x%.2x}'
+    elseif style_lower == 'p' then
+        -- (00000000-0000-0000-0000-000000000000)
+        format = '(%.2x%.2x%.2x%.2x-%.2x%.2x-%.2x%.2x-%.2x%.2x-%.2x%.2x%.2x%.2x%.2x%.2x)'
+    elseif style_lower == 'x' then
+        -- {0x00000000,0x0000,0x0000,{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}}
+        format = '{0x%.2x%.2x%.2x%.2x,0x%.2x%.2x,0x%.2x%.2x,{0x%.2x,0x%.2x,0x%.2x,0x%.2x,0x%.2x,0x%.2x,0x%.2x,0x%.2x}}'
+    end
+
+    local formatted = string.format(format, unpack(guid))
+    if style:upper() == style then
+        formatted = formatted:upper():gsub('X', 'x')
+    end
+
+    return formatted
+end
+
+local function guid_insert(style)
     local pos = get_cursor_pos()
     local guid = guid_generate()
-    insert_text_at_pos(guid_format(guid), pos)
+    insert_text_at_pos(guid_format(guid, style), pos)
 end
 
 return {

plugin/guid.lua

@@ -5,13 +5,13 @@ local function guid_reload()
     guid = require('guid')
 end
 
-local function guid_insert()
+local function guid_insert(ctx)
     guid_reload()
-    guid.guid_insert()
+    guid.guid_insert(ctx.args)
 end
 
 if not vim.g.guid then
     vim.api.nvim_create_user_command('GuidReload', guid_reload, {})
-    vim.api.nvim_create_user_command('GuidInsert', guid_insert, {})
+    vim.api.nvim_create_user_command('GuidInsert', guid_insert, {nargs = '?'})
     vim.g.guid = true
 end