Page MenuHomePhabricator (Chris)
Files F135224

sed.lua
No OneTemporary
Actions

Authored By
Unknown
Size
3 KB
Referenced Files
None
Subscribers
None

sed.lua
View Options

--[[
mattata v2.0 - Sed Plugin
Regex-style substitution on replied-to messages using Lua patterns.
]]
local plugin = {}
plugin.name = 'sed'
plugin.category = 'utility'
plugin.description = 'Regex-style find and replace on messages'
plugin.commands = {}
plugin.help = 's/pattern/replacement/ - Reply to a message to perform a find-and-replace using Lua patterns.'
function plugin.on_new_message(api, message, ctx)
if not message.text then return end
if not message.reply then return end
if not message.reply.text or message.reply.text == '' then return end
-- Match s/pattern/replacement/ or s/pattern/replacement (no trailing slash)
-- Support escaped forward slashes within the pattern/replacement
local pattern, replacement, flags = message.text:match('^s/(.-[^\\])/(.-[^\\]?)/([gi]*)$')
if not pattern then
pattern, replacement = message.text:match('^s/(.-[^\\])/(.-[^\\]?)/?$')
flags = ''
end
-- Handle edge case: empty replacement
if not pattern then
pattern = message.text:match('^s/(.-[^\\])//[gi]*$')
if pattern then replacement = '' end
end
if not pattern then
pattern = message.text:match('^s/(.-[^\\])/$')
if pattern then replacement = '' end
end
if not pattern or not replacement then return end
-- Unescape forward slashes
pattern = pattern:gsub('\\/', '/')
replacement = replacement:gsub('\\/', '/')
-- Validate the Lua pattern
local ok, err = pcall(string.find, '', pattern)
if not ok then
return api.send_message(message.chat.id, 'Invalid pattern: ' .. tostring(err))
end
-- Reject patterns that could cause catastrophic backtracking
if #pattern > 128 then
return api.send_message(message.chat.id, 'Pattern too long (max 128 characters).')
end
local wq_count = 0
do
local i = 1
while i <= #pattern do
if pattern:sub(i, i) == '%' then
i = i + 2
elseif pattern:sub(i, i) == '.' and i < #pattern then
local nc = pattern:sub(i + 1, i + 1)
if nc == '+' or nc == '*' or nc == '-' then wq_count = wq_count + 1 end
i = i + 1
else
i = i + 1
end
end
end
if wq_count > 3 then
return api.send_message(message.chat.id, 'Pattern too complex (too many wildcard repetitions).')
end
local original = message.reply.text
local result
if flags and flags:find('g') then
result = original:gsub(pattern, replacement)
else
result = original:gsub(pattern, replacement, 1)
end
if result == original then
return api.send_message(message.chat.id, 'No matches found for that pattern.')
end
local tools = require('telegram-bot-lua.tools')
local name = tools.escape_html(message.reply.from and message.reply.from.first_name or 'Unknown')
return api.send_message(
message.chat.id,
string.format('<b>%s</b> meant to say:\n%s', name, tools.escape_html(result)),
{ parse_mode = 'html' }
)
end
return plugin

File Metadata

Mime Type
text/plain
Expires
Thu, Jun 25, 11:20 PM (3 d, 8 h ago)
Storage Engine
blob
Storage Format
Raw Data
Storage Handle
73043
Default Alt Text
sed.lua (3 KB)

Event Timeline