Mikubot-2/plugins/hearthstone.lua

 -- Plugin for the Hearthstone database provided by hearthstonejson.com.

if not database.hearthstone or os.time() > database.hearthstone.expiration then

	print('Downloading Hearthstone database...')

	-- This stuff doesn't play well with lua-sec. Disable it for now; hack in curl.
	--local jstr, res = HTTPS.request('https://api.hearthstonejson.com/v1/latest/enUS/cards.json')
	--if res ~= 200 then
		--print('Error connecting to hearthstonejson.com.')
		--print('hearthstone.lua will not be enabled.')
		--return
	--end
	--local jdat = JSON.decode(jstr)

	local s = io.popen('curl -s https://api.hearthstonejson.com/v1/latest/enUS/cards.json'):read('*all')
	local d = JSON.decode(s)

	if not d then
		print('Error connecting to hearthstonejson.com.')
		print('hearthstone.lua will not be enabled.')
		return
	end

	database.hearthstone = d
	database.hearthstone.expiration = os.time() + 600000

	print('Download complete! It will be stored for a week.')

end

local command = 'hearthstone <query>'
local doc = [[```
/hearthstone <query>
Returns Hearthstone card info.
Alias: /hs
```]]

local triggers = {
	'^/hearthstone[@'..bot.username..']*',
	'^/hs[@'..bot.username..']*$',
	'^/hs[@'..bot.username..']* '
}

local format_card = function(card)

	local ctype = card.type
	if card.race then
		ctype = card.race
	end
	if card.rarity then
		ctype = card.rarity .. ' ' .. ctype
	end
	if card.playerClass then
		ctype = ctype .. ' (' .. card.playerClass .. ')'
	elseif card.faction then
		ctype = ctype .. ' (' .. card.faction .. ')'
	end

	local stats
	if card.cost then
		stats = card.cost .. 'c'
		if card.attack then
			stats = stats .. ' | ' .. card.attack .. 'a'
		end
		if card.health then
			stats = stats .. ' | ' .. card.health .. 'h'
		end
		if card.durability then
			stats = stats .. ' | ' .. card.durability .. 'd'
		end
	elseif card.health then
		stats = card.health .. 'h'
	end

	local info = ''
	if card.text then
		info = card.text:gsub('</?.->',''):gsub('%$','')
		if card.flavor then
			info = info .. '\n_' .. card.flavor .. '_'
		end
	elseif card.flavor then
		info = card.flavor
	else
		info = nil
	end

	local s = '*' .. card.name .. '*\n' .. ctype
	if stats then
		s = s .. '\n' .. stats
	end
	if info then
		s = s .. '\n' .. info
	end

	return s

end

local action = function(msg)

	local input = msg.text_lower:input()
	if not input then
		sendMessage(msg.chat.id, doc, true, msg.message_id, true)
		return
	end

	local output = ''
	for k,v in pairs(database.hearthstone) do
		if type(v) == 'table' and string.lower(v.name):match(input) then
			output = output .. format_card(v) .. '\n\n'
		end
	end

	output = output:trim()
	if output:len() == 0 then
		sendReply(msg, config.errors.results)
		return
	end

	sendMessage(msg.chat.id, output, true, msg.message_id, true)

end

return {
	action = action,
	triggers = triggers,
	doc = doc,
	command = command
}