Updated actions/init.lua

Added actions@hyperlink_exec. Responsible for acting upon an execution
call from keybinding. Function gets the contents of the buffer and makes
call to actions@suburl.

Added actions@suburl. This function specifically performs a substitution
of text in a buffer line and replaces it with a hyperlink, formatted as
markdown.

lua/presser/actions/init.lua

@@ -1,4 +1,5 @@
 local gcm = require'presser.context_manager'
+--local actions = require'presser.actions'
 local utils = require'presser.utils'
 
 local a = vim.api
@@ -59,6 +60,34 @@ actions.execute = function ()
   a.nvim_exec( cmd, false )
 end
 
+actions.hyperlink_exec = function ()
+  local url = utils.clean_buf(read_buffer()[1])
+  actions.close()
+
+  if url == "" then return nil end
+
+  local _, cur_start, _, cur_end = utils.get_selection()
+  local line = a.nvim_get_current_line()
+  if line == "" then
+    return
+  end
+
+  local row, col = unpack(a.nvim_win_get_cursor(0))
+  if cur_start == -1 then
+    cur_start, cur_end = unpack(utils.subslice(line .. " ", col))
+  end
+
+  actions.suburl( line, row, url, cur_start, cur_end )
+end
+
+actions.suburl = function (line, row, url, cur_start, cur_end)
+  local prefix = string.sub(line, 1, cur_start) -- the first part up to selection
+  local suffix = string.sub(line, cur_end + 1, line:len()) -- the last part after selection
+  local infix = "[" .. utils.clean_buf(string.sub(line, cur_start, cur_end)) .. "]" .. "(" .. url .. ")"
+
+  a.nvim_buf_set_lines( 0, row-1, row, false, { prefix .. infix .. suffix }  )
+end
+
 actions.buf_put_curser_at = function ( label )
   for _, ctx_obj in pairs( vim.g.presser_buf_ctx ) do
     for _, record in pairs( ctx_obj ) do