99 lines
3.2 KiB
Lua
99 lines
3.2 KiB
Lua
local remind = {}
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local bindings = require('bindings')
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local utilities = require('utilities')
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remind.command = 'remind <duration> <message>'
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remind.doc = [[```
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/remind <duration> <message>
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Repeats a message after a duration of time, in minutes.
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```]]
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function remind:init()
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self.database.reminders = self.database.reminders or {}
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remind.triggers = utilities.triggers(self.info.username):t('remind', true).table
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end
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function remind:action(msg)
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-- Ensure there are arguments. If not, send doc.
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local input = utilities.input(msg.text)
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if not input then
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bindings.sendMessage(self, msg.chat.id, remind.doc, true, msg.message_id, true)
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return
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end
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-- Ensure first arg is a number. If not, send doc.
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local duration = utilities.get_word(input, 1)
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if not tonumber(duration) then
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bindings.sendMessage(self, msg.chat.id, remind.doc, true, msg.message_id, true)
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return
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end
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-- Duration must be between one minute and one year (approximately).
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duration = tonumber(duration)
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if duration < 1 then
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duration = 1
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elseif duration > 526000 then
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duration = 526000
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end
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-- Ensure there is a second arg.
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local message = utilities.input(input)
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if not message then
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bindings.sendMessage(self, msg.chat.id, remind.doc, true, msg.message_id, true)
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return
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end
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-- Make a database entry for the group/user if one does not exist.
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self.database.reminders[msg.chat.id_str] = self.database.reminders[msg.chat.id_str] or {}
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-- Limit group reminders to 10 and private reminders to 50.
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if msg.chat.type ~= 'private' and utilities.table_size(self.database.reminders[msg.chat.id_str]) > 9 then
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bindings.sendReply(self, msg, 'Sorry, this group already has ten reminders.')
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return
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elseif msg.chat.type == 'private' and utilities.table_size(self.database.reminders[msg.chat.id_str]) > 49 then
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bindings.sendReply(msg, 'Sorry, you already have fifty reminders.')
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return
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end
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-- Put together the reminder with the expiration, message, and message to reply to.
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local reminder = {
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time = os.time() + duration * 60,
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message = message
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}
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table.insert(self.database.reminders[msg.chat.id_str], reminder)
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local output = 'I will remind you in ' .. duration
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if duration == 1 then
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output = output .. ' minute!'
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else
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output = output .. ' minutes!'
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end
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bindings.sendReply(self, msg, output)
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end
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function remind:cron()
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local time = os.time()
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-- Iterate over the group entries in the reminders database.
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for chat_id, group in pairs(self.database.reminders) do
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local new_group = {}
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-- Iterate over each reminder.
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for _, reminder in ipairs(group) do
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-- If the reminder is past-due, send it and nullify it.
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-- Otherwise, add it to the replacement table.
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if time > reminder.time then
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local output = '*Reminder:*\n"' .. utilities.md_escape(reminder.message) .. '"'
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local res = bindings.sendMessage(self, chat_id, output, true, nil, true)
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-- If the message fails to send, save it for later.
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if not res then
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table.insert(new_group, reminder)
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end
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else
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table.insert(new_group, reminder)
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end
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end
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-- Nullify the original table and replace it with the new one.
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self.database.reminders[chat_id] = new_group
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-- Nullify the table if it is empty.
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if #new_group == 0 then
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self.database.reminders[chat_id] = nil
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end
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end
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end
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return remind
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