49 lines
1.1 KiB
Lua
49 lines
1.1 KiB
Lua
local preview = {}
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local HTTP = require('socket.http')
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local bindings = require('bindings')
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local utilities = require('utilities')
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preview.command = 'preview <link>'
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preview.doc = [[```
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/preview <link>
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Returns a full-message, "unlinked" preview.
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```]]
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function preview:init()
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preview.triggers = utilities.triggers(self.info.username):t('preview', true).table
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end
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function preview:action(msg)
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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, preview.doc, true, nil, true)
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return
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end
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input = utilities.get_word(input, 1)
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if not input:match('^https?://.+') then
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input = 'http://' .. input
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end
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local res = HTTP.request(input)
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if not res then
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bindings.sendReply(self, msg, 'Please provide a valid link.')
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return
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end
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if res:len() == 0 then
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bindings.sendReply(self, msg, 'Sorry, the link you provided is not letting us make a preview.')
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return
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end
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-- Invisible zero-width, non-joiner.
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local output = '[](' .. input .. ')'
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bindings.sendMessage(self, msg.chat.id, output, false, nil, true)
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end
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return preview
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