Add some error handling

lua/telescope/_extensions/knot.lua

@@ -53,12 +53,21 @@ local _parse_record = function(rec)
   for _, v in ipairs(rec) do
     if v ~= nil and v ~= "" then
       local key = v:match("%w+"):lower()
-      record[key] = v:gsub("%w+%:%s", "")
+      if vim.tbl_contains({ "zone", "rtype", "name", "data", "ttl" }, key) then
+        record[key] = v:gsub("%w+%:%s", "")
+      end
     end
   end
   return record
 end
 
+local _validate_record = function(record)
+  if record.zone == nil or record.rtype == nil or record.name == nil or record.data == nil then
+    return false
+  end
+  return true
+end
+
 local M = {}
 M.add = function(_)
   local tempfile = vim.fn.tempname()
@@ -82,14 +91,18 @@ M.add = function(_)
     callback = function(_)
       local new = vim.api.nvim_buf_get_lines(buffer, 0, -1, false)
       local record = _parse_record(new)
-      local command = "knotctl add -z " .. record.zone ..
-          " -t " .. record.ttl ..
-          " -n " .. record.name ..
-          " -r " .. record.rtype ..
-          " -d " .. record.data
-      local choice = vim.fn.confirm("Create record?", "&Yes\n&No", 2)
-      if choice == 1 then
-        log.info(vim.fn.system(command))
+      if _validate_record(record) then
+        local command = "knotctl add -z " .. record.zone ..
+            " -t " .. record.ttl ..
+            " -n " .. record.name ..
+            " -r " .. record.rtype ..
+            " -d " .. record.data
+        local choice = vim.fn.confirm("Create record?", "&Yes\n&No", 2)
+        if choice == 1 then
+          log.info(vim.fn.system(command))
+        end
+      else
+        log.error("Invalid record")
       end
     end
   })
@@ -182,15 +195,19 @@ M.update = function(opts)
                 end
               end
               if did_update then
-                local command = "knotctl update -z " .. cleanold.zone ..
-                    " -t " .. cleanold.ttl ..
-                    " -n " .. cleanold.name ..
-                    " -r " .. cleanold.rtype ..
-                    " -d " .. cleanold.data ..
-                    table.concat(updated, " ")
-                local choice = vim.fn.confirm("Update record?", "&Yes\n&No", 2)
-                if choice == 1 then
-                  log.info(vim.fn.system(command))
+                if _validate_record(cleannew) and _validate_record(cleanold) then
+                  local command = "knotctl update -z " .. cleanold.zone ..
+                      " -t " .. cleanold.ttl ..
+                      " -n " .. cleanold.name ..
+                      " -r " .. cleanold.rtype ..
+                      " -d " .. cleanold.data ..
+                      table.concat(updated, " ")
+                  local choice = vim.fn.confirm("Update record?", "&Yes\n&No", 2)
+                  if choice == 1 then
+                    log.info(vim.fn.system(command))
+                  end
+                else
+                  log.error("Invalid record")
                 end
               end
             end